Squeak-dev December 2021

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[Sounds] How to turn off reverb
by Thiede, Christoph 20 Jul '22

20 Jul '22

Hi all, I never have dealt with the Sound system in Squeak before so here is a newbie question from my side: How can I turn off the reverb which you hear every time you play an FM sound? Take this example: AbstractSound dial: '#'. Either my speakers are broken or there is a reverb that is hidden somewhere in the implementation of FMSound. :-) I can also reproduce this when creating an FMSound manually without defining any envelopes. I also took a look at the ingenious Speech-TTS package from Squeak 3 and could hear a reverb there, too. Is this a bug? Is this a - maybe unfortunate - default setting? How can I turn off this? Thanks in advance! :-) Best, Christoph

8 13

The Inbox: ST80-mt.265.mcz
by commits＠source.squeak.org 08 Jul '22

08 Jul '22

A new version of ST80 was added to project The Inbox: http://source.squeak.org/inbox/ST80-mt.265.mcz ==================== Summary ==================== Name: ST80-mt.265 Author: mt Time: 9 March 2021, 1:33:39.525921 pm UUID: 1b02e796-d790-b34d-9f4f-dd406f43e130 Ancestors: ST80-mt.264 Free the names Path, Arc, Circle, Line, Spline to be used in a prospective Math package. =============== Diff against ST80-mt.264 =============== Item was removed: - Path subclass: #Arc - instanceVariableNames: 'quadrant radius center' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !Arc commentStamp: '<historical>' prior: 0! - Arcs are an unusual implementation of splines due to Ted Kaehler. Imagine two lines that meet at a corner. Now imagine two moving points; one moves from the corner to the end on one line, the other moves from the end of the other line in to the corner. Now imagine a series of lines drawn between those moving points at each step along the way (they form a sort of spider web pattern). By connecting segments of the intersecting lines, a smooth curve is achieved that is tangent to both of the original lines. Voila.! Item was removed: - ----- Method: Arc class>>example (in category 'examples') ----- - example - "Click the button somewhere on the screen. The designated point will - be the center of an Arc with radius 50 in the 4th quadrant." - - | anArc aForm | - aForm := Form extent: 1 @ 30. "make a long thin Form for display" - aForm fillBlack. "turn it black" - anArc := Arc new. - anArc form: aForm. "set the form for display" - anArc radius: 50.0. - anArc center: Sensor waitButton. - anArc quadrant: 4. - anArc displayOn: Display. - Sensor waitButton - - "Arc example"! Item was removed: - ----- Method: Arc>>center (in category 'accessing') ----- - center - "Answer the point at the center of the receiver." - - ^center! Item was removed: - ----- Method: Arc>>center: (in category 'accessing') ----- - center: aPoint - "Set aPoint to be the receiver's center." - - center := aPoint! Item was removed: - ----- Method: Arc>>center:radius: (in category 'accessing') ----- - center: aPoint radius: anInteger - "The receiver is defined by a point at the center and a radius. The - quadrant is not reset." - - center := aPoint. - radius := anInteger! Item was removed: - ----- Method: Arc>>center:radius:quadrant: (in category 'accessing') ----- - center: aPoint radius: anInteger quadrant: section - "Set the receiver's quadrant to be the argument, section. The size of the - receiver is defined by the center and its radius." - - center := aPoint. - radius := anInteger. - quadrant := section! Item was removed: - ----- Method: Arc>>computeBoundingBox (in category 'display box access') ----- - computeBoundingBox - | aRectangle aPoint | - aRectangle := center - radius + form offset extent: form extent + (radius * 2) asPoint. - aPoint := center + form extent. - quadrant = 1 ifTrue: [^ aRectangle encompass: center x @ aPoint y]. - quadrant = 2 ifTrue: [^ aRectangle encompass: aPoint x @ aPoint y]. - quadrant = 3 ifTrue: [^ aRectangle encompass: aPoint x @ center y]. - quadrant = 4 ifTrue: [^ aRectangle encompass: center x @ center y]! Item was removed: - ----- Method: Arc>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm - - | nSegments line angle sin cos xn yn | - nSegments := 12.0. - line := Line new. - line form: self form. - angle := (90.0 / nSegments) degreesToRadians. - sin := angle sin. - cos := angle cos. - quadrant = 1 - ifTrue: - [xn := radius asFloat. - yn := 0.0]. - quadrant = 2 - ifTrue: - [xn := 0.0. - yn := 0.0 - radius asFloat]. - quadrant = 3 - ifTrue: - [xn := 0.0 - radius asFloat. - yn := 0.0]. - quadrant = 4 - ifTrue: - [xn := 0.0. - yn := radius asFloat]. - nSegments asInteger - timesRepeat: - [ | xn1 yn1 | - xn1 := xn * cos + (yn * sin). - yn1 := yn * cos - (xn * sin). - line beginPoint: center + (xn asInteger @ yn asInteger). - line endPoint: center + (xn1 asInteger @ yn1 asInteger). - line - displayOn: aDisplayMedium - at: aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm. - xn := xn1. - yn := yn1]! Item was removed: - ----- Method: Arc>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm - - | newArc tempCenter | - newArc := Arc new. - tempCenter := aTransformation applyTo: self center. - newArc center: tempCenter x asInteger @ tempCenter y asInteger. - newArc quadrant: self quadrant. - newArc radius: (self radius * aTransformation scale x) asInteger. - newArc form: self form. - newArc - displayOn: aDisplayMedium - at: 0 @ 0 - clippingBox: clipRect - rule: anInteger - fillColor: aForm! Item was removed: - ----- Method: Arc>>quadrant (in category 'accessing') ----- - quadrant - "Answer the part of the circle represented by the receiver." - ^quadrant! Item was removed: - ----- Method: Arc>>quadrant: (in category 'accessing') ----- - quadrant: section - "Set the part of the circle represented by the receiver to be the argument, - section." - - quadrant := section! Item was removed: - ----- Method: Arc>>radius (in category 'accessing') ----- - radius - "Answer the receiver's radius." - - ^radius! Item was removed: - ----- Method: Arc>>radius: (in category 'accessing') ----- - radius: anInteger - "Set the receiver's radius to be the argument, anInteger." - - radius := anInteger! Item was removed: - Arc subclass: #Circle - instanceVariableNames: '' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !Circle commentStamp: '<historical>' prior: 0! - I represent a full circle. I am made from four Arcs.! Item was removed: - ----- Method: Circle class>>exampleOne (in category 'examples') ----- - exampleOne - "Click any button somewhere on the screen. The point will be the center - of the circcle of radius 150." - - | aCircle aForm | - aForm := Form extent: 1@30. - aForm fillBlack. - aCircle := Circle new. - aCircle form: aForm. - aCircle radius: 150. - aCircle center: Sensor waitButton. - aCircle displayOn: Display - - "Circle exampleOne"! Item was removed: - ----- Method: Circle class>>exampleTwo (in category 'examples') ----- - exampleTwo - "Designate a rectangular area that should be used as the brush for - displaying the circle. Click any button at a point on the screen which - will be the center location for the circle. The curve will be displayed - with a long black form." - - | aCircle aForm | - aForm := Form fromUser. - aCircle := Circle new. - aCircle form: aForm. - aCircle radius: 150. - aCircle center: Sensor waitButton. - aCircle displayOn: Display at: 0 @ 0 rule: Form reverse - - "Circle exampleTwo"! Item was removed: - ----- Method: Circle>>computeBoundingBox (in category 'display box access') ----- - computeBoundingBox - - ^center - radius + form offset extent: form extent + (radius * 2) asPoint! Item was removed: - ----- Method: Circle>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm - - 1 to: 4 do: - [:i | - super quadrant: i. - super displayOn: aDisplayMedium - at: aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm]! Item was removed: - ----- Method: Circle>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm - - 1 to: 4 do: - [:i | - super quadrant: i. - super displayOn: aDisplayMedium - transformation: aTransformation - clippingBox: clipRect - rule: anInteger - fillColor: aForm]! Item was removed: - Path subclass: #CurveFitter - instanceVariableNames: '' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !CurveFitter commentStamp: '<historical>' prior: 0! - I represent a conic section determined by three points p1, p2 and p3. I interpolate p1 and p3 and am tangent to line p1, p2 at p1 and line p3, p2 at p3.! Item was removed: - ----- Method: CurveFitter class>>example (in category 'examples') ----- - example - "Designate three locations on the screen by clicking any button. The - curve determined by the points will be displayed with a long black form." - - | aCurveFitter aForm | - aForm := Form extent: 1@30. "make a long thin Form for display " - aForm fillBlack. "turn it black" - aCurveFitter := CurveFitter new. - aCurveFitter form: aForm. "set the form for display" - "collect three Points and show them on the dispaly" - aCurveFitter firstPoint: Sensor waitButton. Sensor waitNoButton. - aForm displayOn: Display at: aCurveFitter firstPoint. - aCurveFitter secondPoint: Sensor waitButton. Sensor waitNoButton. - aForm displayOn: Display at: aCurveFitter secondPoint. - aCurveFitter thirdPoint: Sensor waitButton. Sensor waitNoButton. - aForm displayOn: Display at: aCurveFitter thirdPoint. - - aCurveFitter displayOn: Display "display the CurveFitter" - - "CurveFitter example"! Item was removed: - ----- Method: CurveFitter class>>new (in category 'instance creation') ----- - new - - | newSelf | - newSelf := super new: 3. - newSelf add: 0@0. - newSelf add: 0@0. - newSelf add: 0@0. - ^newSelf! Item was removed: - ----- Method: CurveFitter>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm - - | pa pb k s p1 p2 p3 line | - line := Line new. - line form: self form. - collectionOfPoints size < 3 ifTrue: [self error: 'Curve must have three points']. - p1 := self firstPoint. - p2 := self secondPoint. - p3 := self thirdPoint. - s := Path new. - s add: p1. - pa := p2 - p1. - pb := p3 - p2. - k := 5 max: pa x abs + pa y abs + pb x abs + pb y abs // 20. - "k is a guess as to how many line segments to use to approximate - the curve." - 1 to: k do: - [:i | - s add: pa * i // k + p1 * (k - i) + (pb * (i - 1) // k + p2 * (i - 1)) // (k - 1)]. - s add: p3. - 1 to: s size - 1 do: - [:i | - line beginPoint: (s at: i). - line endPoint: (s at: i + 1). - line displayOn: aDisplayMedium - at: aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm]! Item was removed: - ----- Method: CurveFitter>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm - - | transformedPath newCurveFitter | - transformedPath := aTransformation applyTo: self. - newCurveFitter := CurveFitter new. - newCurveFitter firstPoint: transformedPath firstPoint. - newCurveFitter secondPoint: transformedPath secondPoint. - newCurveFitter thirdPoint: transformedPath thirdPoint. - newCurveFitter form: self form. - newCurveFitter - displayOn: aDisplayMedium - at: 0 @ 0 - clippingBox: clipRect - rule: anInteger - fillColor: aForm! Item was added: + DisplayPath subclass: #DisplayArc + instanceVariableNames: 'quadrant radius center' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplayArc commentStamp: '<historical>' prior: 0! + Arcs are an unusual implementation of splines due to Ted Kaehler. Imagine two lines that meet at a corner. Now imagine two moving points; one moves from the corner to the end on one line, the other moves from the end of the other line in to the corner. Now imagine a series of lines drawn between those moving points at each step along the way (they form a sort of spider web pattern). By connecting segments of the intersecting lines, a smooth curve is achieved that is tangent to both of the original lines. Voila.! Item was added: + ----- Method: DisplayArc class>>example (in category 'examples') ----- + example + "Click the button somewhere on the screen. The designated point will + be the center of an DisplayArc with radius 50 in the 4th quadrant." + + | anDisplayArc aForm | + aForm := Form extent: 1 @ 30. "make a long thin Form for display" + aForm fillBlack. "turn it black" + anDisplayArc := DisplayArc new. + anDisplayArc form: aForm. "set the form for display" + anDisplayArc radius: 50.0. + anDisplayArc center: Sensor waitButton. + anDisplayArc quadrant: 4. + anDisplayArc displayOn: Display. + Sensor waitButton + + "DisplayArc example"! Item was added: + ----- Method: DisplayArc>>center (in category 'accessing') ----- + center + "Answer the point at the center of the receiver." + + ^center! Item was added: + ----- Method: DisplayArc>>center: (in category 'accessing') ----- + center: aPoint + "Set aPoint to be the receiver's center." + + center := aPoint! Item was added: + ----- Method: DisplayArc>>center:radius: (in category 'accessing') ----- + center: aPoint radius: anInteger + "The receiver is defined by a point at the center and a radius. The + quadrant is not reset." + + center := aPoint. + radius := anInteger! Item was added: + ----- Method: DisplayArc>>center:radius:quadrant: (in category 'accessing') ----- + center: aPoint radius: anInteger quadrant: section + "Set the receiver's quadrant to be the argument, section. The size of the + receiver is defined by the center and its radius." + + center := aPoint. + radius := anInteger. + quadrant := section! Item was added: + ----- Method: DisplayArc>>computeBoundingBox (in category 'display box access') ----- + computeBoundingBox + | aRectangle aPoint | + aRectangle := center - radius + form offset extent: form extent + (radius * 2) asPoint. + aPoint := center + form extent. + quadrant = 1 ifTrue: [^ aRectangle encompass: center x @ aPoint y]. + quadrant = 2 ifTrue: [^ aRectangle encompass: aPoint x @ aPoint y]. + quadrant = 3 ifTrue: [^ aRectangle encompass: aPoint x @ center y]. + quadrant = 4 ifTrue: [^ aRectangle encompass: center x @ center y]! Item was added: + ----- Method: DisplayArc>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm + + | nSegments line angle sin cos xn yn | + nSegments := 12.0. + line := DisplayLine new. + line form: self form. + angle := (90.0 / nSegments) degreesToRadians. + sin := angle sin. + cos := angle cos. + quadrant = 1 + ifTrue: + [xn := radius asFloat. + yn := 0.0]. + quadrant = 2 + ifTrue: + [xn := 0.0. + yn := 0.0 - radius asFloat]. + quadrant = 3 + ifTrue: + [xn := 0.0 - radius asFloat. + yn := 0.0]. + quadrant = 4 + ifTrue: + [xn := 0.0. + yn := radius asFloat]. + nSegments asInteger + timesRepeat: + [ | xn1 yn1 | + xn1 := xn * cos + (yn * sin). + yn1 := yn * cos - (xn * sin). + line beginPoint: center + (xn asInteger @ yn asInteger). + line endPoint: center + (xn1 asInteger @ yn1 asInteger). + line + displayOn: aDisplayMedium + at: aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm. + xn := xn1. + yn := yn1]! Item was added: + ----- Method: DisplayArc>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm + + | newDisplayArc tempCenter | + newDisplayArc := DisplayArc new. + tempCenter := aTransformation applyTo: self center. + newDisplayArc center: tempCenter x asInteger @ tempCenter y asInteger. + newDisplayArc quadrant: self quadrant. + newDisplayArc radius: (self radius * aTransformation scale x) asInteger. + newDisplayArc form: self form. + newDisplayArc + displayOn: aDisplayMedium + at: 0 @ 0 + clippingBox: clipRect + rule: anInteger + fillColor: aForm! Item was added: + ----- Method: DisplayArc>>quadrant (in category 'accessing') ----- + quadrant + "Answer the part of the circle represented by the receiver." + ^quadrant! Item was added: + ----- Method: DisplayArc>>quadrant: (in category 'accessing') ----- + quadrant: section + "Set the part of the circle represented by the receiver to be the argument, + section." + + quadrant := section! Item was added: + ----- Method: DisplayArc>>radius (in category 'accessing') ----- + radius + "Answer the receiver's radius." + + ^radius! Item was added: + ----- Method: DisplayArc>>radius: (in category 'accessing') ----- + radius: anInteger + "Set the receiver's radius to be the argument, anInteger." + + radius := anInteger! Item was added: + DisplayArc subclass: #DisplayCircle + instanceVariableNames: '' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplayCircle commentStamp: '<historical>' prior: 0! + I represent a full circle. I am made from four Arcs.! Item was added: + ----- Method: DisplayCircle class>>exampleOne (in category 'examples') ----- + exampleOne + "Click any button somewhere on the screen. The point will be the center + of the circcle of radius 150." + + | aDisplayCircle aForm | + aForm := Form extent: 1@30. + aForm fillBlack. + aDisplayCircle := DisplayCircle new. + aDisplayCircle form: aForm. + aDisplayCircle radius: 150. + aDisplayCircle center: Sensor waitButton. + aDisplayCircle displayOn: Display + + "DisplayCircle exampleOne"! Item was added: + ----- Method: DisplayCircle class>>exampleTwo (in category 'examples') ----- + exampleTwo + "Designate a rectangular area that should be used as the brush for + displaying the circle. Click any button at a point on the screen which + will be the center location for the circle. The curve will be displayed + with a long black form." + + | aDisplayCircle aForm | + aForm := Form fromUser. + aDisplayCircle := DisplayCircle new. + aDisplayCircle form: aForm. + aDisplayCircle radius: 150. + aDisplayCircle center: Sensor waitButton. + aDisplayCircle displayOn: Display at: 0 @ 0 rule: Form reverse + + "DisplayCircle exampleTwo"! Item was added: + ----- Method: DisplayCircle>>computeBoundingBox (in category 'display box access') ----- + computeBoundingBox + + ^center - radius + form offset extent: form extent + (radius * 2) asPoint! Item was added: + ----- Method: DisplayCircle>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm + + 1 to: 4 do: + [:i | + super quadrant: i. + super displayOn: aDisplayMedium + at: aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm]! Item was added: + ----- Method: DisplayCircle>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm + + 1 to: 4 do: + [:i | + super quadrant: i. + super displayOn: aDisplayMedium + transformation: aTransformation + clippingBox: clipRect + rule: anInteger + fillColor: aForm]! Item was added: + DisplayPath subclass: #DisplayCurveFitter + instanceVariableNames: '' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplayCurveFitter commentStamp: '<historical>' prior: 0! + I represent a conic section determined by three points p1, p2 and p3. I interpolate p1 and p3 and am tangent to line p1, p2 at p1 and line p3, p2 at p3.! Item was added: + ----- Method: DisplayCurveFitter class>>example (in category 'examples') ----- + example + "Designate three locations on the screen by clicking any button. The + curve determined by the points will be displayed with a long black form." + + | aDisplayCurveFitter aForm | + aForm := Form extent: 1@30. "make a long thin Form for display " + aForm fillBlack. "turn it black" + aDisplayCurveFitter := DisplayCurveFitter new. + aDisplayCurveFitter form: aForm. "set the form for display" + "collect three Points and show them on the dispaly" + aDisplayCurveFitter firstPoint: Sensor waitButton. Sensor waitNoButton. + aForm displayOn: Display at: aDisplayCurveFitter firstPoint. + aDisplayCurveFitter secondPoint: Sensor waitButton. Sensor waitNoButton. + aForm displayOn: Display at: aDisplayCurveFitter secondPoint. + aDisplayCurveFitter thirdPoint: Sensor waitButton. Sensor waitNoButton. + aForm displayOn: Display at: aDisplayCurveFitter thirdPoint. + + aDisplayCurveFitter displayOn: Display "display the DisplayCurveFitter" + + "DisplayCurveFitter example"! Item was added: + ----- Method: DisplayCurveFitter class>>new (in category 'instance creation') ----- + new + + | newSelf | + newSelf := super new: 3. + newSelf add: 0@0. + newSelf add: 0@0. + newSelf add: 0@0. + ^newSelf! Item was added: + ----- Method: DisplayCurveFitter>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm + + | pa pb k s p1 p2 p3 line | + line := DisplayLine new. + line form: self form. + collectionOfPoints size < 3 ifTrue: [self error: 'Curve must have three points']. + p1 := self firstPoint. + p2 := self secondPoint. + p3 := self thirdPoint. + s := DisplayPath new. + s add: p1. + pa := p2 - p1. + pb := p3 - p2. + k := 5 max: pa x abs + pa y abs + pb x abs + pb y abs // 20. + "k is a guess as to how many line segments to use to approximate + the curve." + 1 to: k do: + [:i | + s add: pa * i // k + p1 * (k - i) + (pb * (i - 1) // k + p2 * (i - 1)) // (k - 1)]. + s add: p3. + 1 to: s size - 1 do: + [:i | + line beginPoint: (s at: i). + line endPoint: (s at: i + 1). + line displayOn: aDisplayMedium + at: aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm]! Item was added: + ----- Method: DisplayCurveFitter>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm + + | transformedPath newDisplayCurveFitter | + transformedPath := aTransformation applyTo: self. + newDisplayCurveFitter := DisplayCurveFitter new. + newDisplayCurveFitter firstPoint: transformedPath firstPoint. + newDisplayCurveFitter secondPoint: transformedPath secondPoint. + newDisplayCurveFitter thirdPoint: transformedPath thirdPoint. + newDisplayCurveFitter form: self form. + newDisplayCurveFitter + displayOn: aDisplayMedium + at: 0 @ 0 + clippingBox: clipRect + rule: anInteger + fillColor: aForm! Item was added: + DisplayPath subclass: #DisplayLine + instanceVariableNames: '' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplayLine commentStamp: '<historical>' prior: 0! + I represent the line segment specified by two points.! Item was added: + ----- Method: DisplayLine class>>example (in category 'examples') ----- + example + "Designate two places on the screen by clicking any mouse button. A + straight path with a square black form will be displayed connecting the + two selected points." + + | aDisplayLine aForm | + aForm := Form extent: 20@20. "make a form one quarter of inch square" + aForm fillBlack. "turn it black" + aDisplayLine := DisplayLine new. + aDisplayLine form: aForm. "use the black form for display" + aDisplayLine beginPoint: Sensor waitButton. Sensor waitNoButton. + aForm displayOn: Display at: aDisplayLine beginPoint. + aDisplayLine endPoint: Sensor waitButton. + aDisplayLine displayOn: Display. "display the line" + + "DisplayLine example"! Item was added: + ----- Method: DisplayLine class>>from:to:withForm: (in category 'instance creation') ----- + from: beginPoint to: endPoint withForm: aForm + "Answer an instance of me with end points begingPoint and endPoint; + the source form for displaying the line is aForm." + + | newSelf | + newSelf := super new: 2. + newSelf add: beginPoint. + newSelf add: endPoint. + newSelf form: aForm. + ^newSelf! Item was added: + ----- Method: DisplayLine class>>new (in category 'instance creation') ----- + new + + | newSelf | + newSelf := super new: 2. + newSelf add: 0@0. + newSelf add: 0@0. + ^newSelf! Item was added: + ----- Method: DisplayLine>>beginPoint (in category 'accessing') ----- + beginPoint + "Answer the first end point of the receiver." + + ^self first! Item was added: + ----- Method: DisplayLine>>beginPoint: (in category 'accessing') ----- + beginPoint: aPoint + "Set the first end point of the receiver to be the argument, aPoint. + Answer aPoint." + + self at: 1 put: aPoint. + ^aPoint! Item was added: + ----- Method: DisplayLine>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm + "The form associated with this Path will be displayed, according + to one of the sixteen functions of two logical variables (rule), at + each point on the Line. Also the source form will be first anded + with aForm as a mask. Does not effect the state of the Path." + + collectionOfPoints size < 2 ifTrue: [self error: 'a line must have two points']. + aDisplayMedium + drawLine: self form + from: self beginPoint + aPoint + to: self endPoint + aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm! Item was added: + ----- Method: DisplayLine>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm + + | newPath newDisplayLine | + newPath := aTransformation applyTo: self. + newDisplayLine := DisplayLine new. + newDisplayLine beginPoint: newPath firstPoint. + newDisplayLine endPoint: newPath secondPoint. + newDisplayLine form: self form. + newDisplayLine + displayOn: aDisplayMedium + at: 0 @ 0 + clippingBox: clipRect + rule: anInteger + fillColor: aForm! Item was added: + ----- Method: DisplayLine>>displayOnPort:at: (in category 'displaying') ----- + displayOnPort: aPort at: aPoint + aPort sourceForm: self form; combinationRule: Form under; fillColor: nil. + aPort drawFrom: collectionOfPoints first + aPoint + to: collectionOfPoints last + aPoint! Item was added: + ----- Method: DisplayLine>>endPoint (in category 'accessing') ----- + endPoint + "Answer the last end point of the receiver." + + ^self last! Item was added: + ----- Method: DisplayLine>>endPoint: (in category 'accessing') ----- + endPoint: aPoint + "Set the first end point of the receiver to be the argument, aPoint. + Answer aPoint." + + self at: 2 put: aPoint. + ^aPoint! Item was added: + DisplayPath subclass: #DisplayLinearFit + instanceVariableNames: '' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplayLinearFit commentStamp: '<historical>' prior: 0! + I represent a piece-wise linear approximation to a set of points in the plane.! Item was added: + ----- Method: DisplayLinearFit class>>example (in category 'examples') ----- + example + "Select points on a Path using the red button. Terminate by selecting + any other button. Creates a Path from the points and displays it as a + piece-wise linear approximation." + + | aDisplayLinearFit aForm flag | + aDisplayLinearFit := DisplayLinearFit new. + aForm := Form extent: 1 @ 40. + aForm fillBlack. + aDisplayLinearFit form: aForm. + flag := true. + [flag] whileTrue: + [Sensor waitButton. + Sensor redButtonPressed + ifTrue: [aDisplayLinearFit add: Sensor waitButton. Sensor waitNoButton. + aForm displayOn: Display at: aDisplayLinearFit last] + ifFalse: [flag:=false]]. + aDisplayLinearFit displayOn: Display + + "DisplayLinearFit example"! Item was added: + ----- Method: DisplayLinearFit>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger + fillColor: aForm + + | line | + line := DisplayLine new. + line form: self form. + 1 to: self size - 1 do: + [:i | + line beginPoint: (self at: i). + line endPoint: (self at: i + 1). + line displayOn: aDisplayMedium + at: aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm]! Item was added: + ----- Method: DisplayLinearFit>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: aTransformation clippingBox: + clipRect rule: anInteger fillColor: aForm + + | transformedPath | + "get the scaled and translated Path." + transformedPath := aTransformation applyTo: self. + transformedPath + displayOn: aDisplayMedium + at: 0 @ 0 + clippingBox: clipRect + rule: anInteger + fillColor: aForm! Item was added: + DisplayObject subclass: #DisplayPath + instanceVariableNames: 'form collectionOfPoints' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplayPath commentStamp: '<historical>' prior: 0! + I am the abstract superclass of the Graphic spatial primitives. I represent an ordered sequence of Points. Spatial primitives are used to generate "trajectories" such as lines and circles.! Item was added: + ----- Method: DisplayPath class>>example (in category 'examples') ----- + example + "Creates a DisplayPath from mousePoints and displays it several ways on the display screen. Messes up the display. For learning about class DisplayPath, just select the code below and execute it to create a path and see it redisplayed in another place on the screen. Each path displays using a different form. A path is indicated by pressing the red mouse button in a sequence; press any other mouse button to terminate. " + + | aDisplayPath aForm pl fl flag | + aForm := Form extent: 2 @ 40. "creates a form one inch long" + aForm fillBlack. "turns it black" + aDisplayPath := DisplayPath new. + aDisplayPath form: aForm. "use the long black form for displaying" + flag := true. + [flag] + whileTrue: + [Sensor waitButton. + Sensor redButtonPressed + ifTrue: + [aDisplayPath add: Sensor waitButton. + Sensor waitNoButton. + aForm displayOn: Display at: aDisplayPath last] + ifFalse: [flag := false]]. + Display fillWhite. + aDisplayPath displayOn: Display. "the original path" + pl := aDisplayPath translateBy: 0 @ 100. + fl := Form extent: 40 @ 40. + fl fillGray. + pl form: fl. + pl displayOn: Display. "the translated path" + Sensor waitNoButton + + "DisplayPath example"! Item was added: + ----- Method: DisplayPath class>>new (in category 'instance creation') ----- + new + + ^self basicNew initializeCollectionOfPoints! Item was added: + ----- Method: DisplayPath class>>new: (in category 'instance creation') ----- + new: anInteger + + ^self basicNew initializeCollectionOfPoints: anInteger! Item was added: + ----- Method: DisplayPath>>add: (in category 'adding') ----- + add: aPoint + "Include aPoint as one of the receiver's elements." + + ^collectionOfPoints add: aPoint! Item was added: + ----- Method: DisplayPath>>at: (in category 'accessing') ----- + at: index + "Answer the point on the receiver's path at position index." + + ^collectionOfPoints at: index! Item was added: + ----- Method: DisplayPath>>at:put: (in category 'accessing') ----- + at: index put: aPoint + "Store the argument, aPoint, as the point on the receiver's path at position + index." + + ^collectionOfPoints at: index put: aPoint! Item was added: + ----- Method: DisplayPath>>collect: (in category 'enumerating') ----- + collect: aBlock + "Evaluate aBlock with each of the receiver's elements as the argument. + Collect the resulting values into a path that is like the receiver. Answer + the new path." + + | newCollection | + newCollection := collectionOfPoints collect: aBlock. + newCollection form: self form. + ^newCollection! Item was added: + ----- Method: DisplayPath>>computeBoundingBox (in category 'display box access') ----- + computeBoundingBox + "Refer to the comment in DisplayObject|computeBoundingBox." + + | box | + box := Rectangle origin: (self at: 1) extent: 0 @ 0. + collectionOfPoints do: + [:aPoint | box swallow: (Rectangle origin: aPoint extent: 0 @ 0)]. + ^box! Item was added: + ----- Method: DisplayPath>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aDisplayPoint clippingBox: clipRectangle rule: ruleInteger fillColor: aForm + "Display this Path--offset by aPoint, clipped by clipRect and the form + associated with this Path will be displayedr according to one of the sixteen + functions of two logical variables (rule). Also the source form will be first + anded with aForm as a mask. Does not effect the state of the Path" + + collectionOfPoints do: + [:element | + self form + displayOn: aDisplayMedium + at: element + aDisplayPoint + clippingBox: clipRectangle + rule: ruleInteger + fillColor: aForm]! Item was added: + ----- Method: DisplayPath>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: displayTransformation clippingBox: clipRectangle rule: ruleInteger fillColor: aForm + "Displays this path, translated and scaled by aTransformation. Get the + scaled and translated DisplayPath." + + | newDisplayPath transformedDisplayPath | + transformedDisplayPath := displayTransformation applyTo: self. + newDisplayPath := DisplayPath new. + transformedDisplayPath do: [:point | newDisplayPath add: point]. + newDisplayPath form: self form. + newDisplayPath + displayOn: aDisplayMedium + at: 0 @ 0 + clippingBox: clipRectangle + rule: ruleInteger + fillColor: aForm! Item was added: + ----- Method: DisplayPath>>first (in category 'accessing') ----- + first + "Answer the first point on the receiver's path; included to correspond to + OrderedCollection protocol." + + ^collectionOfPoints first! Item was added: + ----- Method: DisplayPath>>firstPoint (in category 'accessing') ----- + firstPoint + "Answer the first point on the receiver's path." + + ^collectionOfPoints first! Item was added: + ----- Method: DisplayPath>>firstPoint: (in category 'accessing') ----- + firstPoint: aPoint + "Replace the first element of the receiver with the new value aPoint. + Answer the argument aPoint." + + collectionOfPoints at: 1 put: aPoint. + ^aPoint! Item was added: + ----- Method: DisplayPath>>form (in category 'accessing') ----- + form + "Answer the receiver's form, or, if form is nil, then answer a 1 x 1 black + form (a black dot)." + + | aForm | + form == nil + ifTrue: + [aForm := Form extent: 1 @ 1. + aForm fillBlack. + ^aForm] + ifFalse: + [^form]! Item was added: + ----- Method: DisplayPath>>form: (in category 'accessing') ----- + form: aForm + "Make the argument, aForm, be the receiver's form." + + form := aForm! Item was added: + ----- Method: DisplayPath>>initializeCollectionOfPoints (in category 'private') ----- + initializeCollectionOfPoints + + collectionOfPoints := OrderedCollection new! Item was added: + ----- Method: DisplayPath>>initializeCollectionOfPoints: (in category 'private') ----- + initializeCollectionOfPoints: anInteger + + collectionOfPoints := OrderedCollection new: anInteger! Item was added: + ----- Method: DisplayPath>>isEmpty (in category 'testing') ----- + isEmpty + + ^collectionOfPoints isEmpty! Item was added: + ----- Method: DisplayPath>>last (in category 'accessing') ----- + last + "Answer the last point on the receiver's path; included to correspond to + OrderedCollection protocol." + + ^collectionOfPoints last! Item was added: + ----- Method: DisplayPath>>offset (in category 'accessing') ----- + offset + "There are basically two kinds of display objects in the system: those + that, when asked to transform themselves, create a new object; and those + that side effect themselves by maintaining a record of the transformation + request (typically an offset). Path, like Rectangle and Point, is a display + object of the first kind." + + self shouldNotImplement! Item was added: + ----- Method: DisplayPath>>removeAllSuchThat: (in category 'removing') ----- + removeAllSuchThat: aBlock + "Evaluate aBlock for each element of the receiver. + Remove each element for which aBlock evaluates to true." + + collectionOfPoints removeAllSuchThat: aBlock. + ! Item was added: + ----- Method: DisplayPath>>scaleBy: (in category 'transforming') ----- + scaleBy: aPoint + "Answers a new Path scaled by aPoint. Does not affect the current data in + this Path." + + | newPath | + newPath := self species new: self size. + newPath form: self form. + collectionOfPoints do: [:element | newPath add: (element scaleBy: aPoint)]. + ^newPath! Item was added: + ----- Method: DisplayPath>>secondPoint (in category 'accessing') ----- + secondPoint + "Answer the second element of the receiver." + + ^collectionOfPoints at: 2! Item was added: + ----- Method: DisplayPath>>secondPoint: (in category 'accessing') ----- + secondPoint: aPoint + "Replace the second element of the receiver with the new value aPoint. + Answer the argument aPoint." + + collectionOfPoints at: 2 put: aPoint. + ^aPoint! Item was added: + ----- Method: DisplayPath>>select: (in category 'enumerating') ----- + select: aBlock + "Evaluate aBlock with each of the receiver's elements as the argument. + Collect into a new path like the receiver only those elements for which + aBlock evaluates to true. Answer the new path." + + | newCollection | + newCollection := collectionOfPoints select: aBlock. + newCollection form: self form. + ^newCollection! Item was added: + ----- Method: DisplayPath>>size (in category 'accessing') ----- + size + "Answer the length of the receiver." + + ^collectionOfPoints size! Item was added: + ----- Method: DisplayPath>>thirdPoint (in category 'accessing') ----- + thirdPoint + "Answer the third element of the receiver." + + ^collectionOfPoints at: 3! Item was added: + ----- Method: DisplayPath>>thirdPoint: (in category 'accessing') ----- + thirdPoint: aPoint + "Replace the third element of the receiver with the new value aPoint. + Answer the argument aPoint." + + collectionOfPoints at: 3 put: aPoint. + ^aPoint! Item was added: + ----- Method: DisplayPath>>translateBy: (in category 'transforming') ----- + translateBy: aPoint + "Answers a new Path whose elements are translated by aPoint. Does not + affect the elements of this Path." + + | newPath | + newPath := self species new: self size. + newPath form: self form. + collectionOfPoints do: [:element | newPath add: (element translateBy: aPoint)]. + ^newPath! Item was added: + DisplayPath subclass: #DisplaySpline + instanceVariableNames: 'coefficients' + classVariableNames: '' + poolDictionaries: '' + category: 'ST80-Paths'! + + !DisplaySpline commentStamp: '<historical>' prior: 0! + I represent a collection of Points through which a cubic spline curve is fitted.! Item was added: + ----- Method: DisplaySpline class>>example (in category 'examples') ----- + example + "Designate points on the Path by clicking the red button. Terminate by + pressing any other button. A curve will be displayed, through the + selected points, using a long black form." + + | splineCurve aForm flag| + aForm := Form extent: 2@2. + aForm fillBlack. + splineCurve := DisplaySpline new. + splineCurve form: aForm. + flag := true. + [flag] whileTrue: + [Sensor waitButton. + Sensor redButtonPressed + ifTrue: + [splineCurve add: Sensor waitButton. + Sensor waitNoButton. + aForm displayOn: Display at: splineCurve last] + ifFalse: [flag:=false]]. + splineCurve computeCurve. + splineCurve isEmpty + ifFalse: [splineCurve displayOn: Display. + Sensor waitNoButton]. + + "DisplaySpline example"! Item was added: + ----- Method: DisplaySpline>>coefficients (in category 'accessing') ----- + coefficients + "Answer an eight-element Array of Arrays each of which is the length + of the receiver. The first four arrays are the values, first, second and + third derivatives, respectively, for the parametric spline in x. The last + four elements are for y." + + ^coefficients! Item was added: + ----- Method: DisplaySpline>>computeCurve (in category 'displaying') ----- + computeCurve + "Compute an array for the coefficients." + + | length extras | + length := self size. + extras := 0. + coefficients := Array new: 8. + 1 to: 8 do: [:i | coefficients at: i put: (Array new: length + extras)]. + 1 to: 5 by: 4 do: + [:k | + 1 to: length do: + [:i | (coefficients at: k) + at: i put: (k = 1 + ifTrue: [(self at: i) x asFloat] + ifFalse: [(self at: i) y asFloat])]. + 1 to: extras do: [:i | (coefficients at: k) + at: length + i put: ((coefficients at: k) + at: i + 1)]. + self derivs: (coefficients at: k) + first: (coefficients at: k + 1) + second: (coefficients at: k + 2) + third: (coefficients at: k + 3)]. + extras > 0 + ifTrue: [1 to: 8 do: + [:i | + coefficients at: i put: ((coefficients at: i) + copyFrom: 2 to: length + 1)]]! Item was added: + ----- Method: DisplaySpline>>derivs:first:second:third: (in category 'private') ----- + derivs: a first: point1 second: point2 third: point3 + "Compute the first, second and third derivitives (in coefficients) from + the Points in this Path (coefficients at: 1 and coefficients at: 5)." + + | l v anArray | + l := a size. + l < 2 ifTrue: [^self]. + l > 2 + ifTrue: + [v := Array new: l. + v at: 1 put: 4.0. + anArray := Array new: l. + anArray at: 1 put: (6.0 * ((a at: 1) - ((a at: 2) * 2.0) + (a at: 3))). + 2 to: l - 2 do: + [:i | + v at: i put: (4.0 - (1.0 / (v at: (i - 1)))). + anArray + at: i + put: (6.0 * ((a at: i) - ((a at: (i + 1)) * 2.0) + (a at: (i + 2))) + - ((anArray at: (i - 1)) / (v at: (i - 1))))]. + point2 at: (l - 1) put: ((anArray at: (l - 2)) / (v at: (l - 2))). + l - 2 to: 2 by: 0-1 do: + [:i | + point2 + at: i + put: ((anArray at: (i - 1)) - (point2 at: (i + 1)) / (v at: (i - 1)))]]. + point2 at: 1 put: (point2 at: l put: 0.0). + 1 to: l - 1 do: + [:i | point1 + at: i + put: ((a at: (i + 1)) - (a at: i) - + ((point2 at: i) * 2.0 + (point2 at: (i + 1)) / 6.0)). + point3 at: i put: ((point2 at: (i + 1)) - (point2 at: i))]! Item was added: + ----- Method: DisplaySpline>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm + "Display the receiver, a spline curve, approximated by straight line + segments." + + | n line t x y x1 x2 x3 y1 y2 y3 | + collectionOfPoints size < 1 ifTrue: [self error: 'a spline must have at least one point']. + line := DisplayLine new. + line form: self form. + line beginPoint: + (x := (coefficients at: 1) at: 1) rounded @ (y := (coefficients at: 5) at: 1) rounded. + 1 to: (coefficients at: 1) size - 1 do: + [:i | + "taylor series coefficients" + x1 := (coefficients at: 2) at: i. + y1 := (coefficients at: 6) at: i. + x2 := ((coefficients at: 3) at: i) / 2.0. + y2 := ((coefficients at: 7) at: i) / 2.0. + x3 := ((coefficients at: 4) at: i) / 6.0. + y3 := ((coefficients at: 8) at: i) / 6.0. + "guess n" + n := 5 max: (x2 abs + y2 abs * 2.0 + ((coefficients at: 3) + at: i + 1) abs + ((coefficients at: 7) + at: i + 1) abs / 100.0) rounded. + 1 to: n - 1 do: + [:j | + t := j asFloat / n. + line endPoint: + (x3 * t + x2 * t + x1 * t + x) rounded + @ (y3 * t + y2 * t + y1 * t + y) rounded. + line + displayOn: aDisplayMedium + at: aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm. + line beginPoint: line endPoint]. + line beginPoint: + (x := (coefficients at: 1) at: i + 1) rounded + @ (y := (coefficients at: 5) at: i + 1) rounded. + line + displayOn: aDisplayMedium + at: aPoint + clippingBox: clipRect + rule: anInteger + fillColor: aForm]! Item was added: + ----- Method: DisplaySpline>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- + displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm + "Get the scaled and translated path of newKnots." + + | newKnots newDisplaySpline | + newKnots := aTransformation applyTo: self. + newDisplaySpline := DisplaySpline new. + newKnots do: [:knot | newDisplaySpline add: knot]. + newDisplaySpline form: self form. + newDisplaySpline + displayOn: aDisplayMedium + at: 0 @ 0 + clippingBox: clipRect + rule: anInteger + fillColor: aForm! Item was changed: ----- Method: FormEditor>>curve (in category 'editing tools') ----- curve "Conic-section specified by three points designated by: first point--press red button second point--release red button third point--click red button. The resultant curve on the display is displayed according to the current form and mode." | firstPoint secondPoint thirdPoint curve drawForm | "sensor noButtonPressed ifTrue: [^self]." firstPoint := self cursorPoint. secondPoint := self rubberBandFrom: firstPoint until: [sensor noButtonPressed]. thirdPoint := self rubberBandFrom: secondPoint until: [sensor redButtonPressed]. Display depth > 1 ifTrue: [self deleteRubberBandFrom: secondPoint to: thirdPoint. self deleteRubberBandFrom: firstPoint to: secondPoint]. + curve := DisplayCurveFitter new. - curve := CurveFitter new. curve firstPoint: firstPoint. curve secondPoint: secondPoint. curve thirdPoint: thirdPoint. drawForm := form asFormOfDepth: Display depth. Display depth > 1 ifTrue: [drawForm mapColor: Color white to: Color transparent; mapColor: Color black to: color]. curve form: drawForm. curve displayOn: Display at: 0 @ 0 clippingBox: view insetDisplayBox rule: (Display depth > 1 ifTrue: [mode ~= Form erase ifTrue: [Form paint] ifFalse: [mode]] ifFalse: [mode]) fillColor: (Display depth = 1 ifTrue: [color] ifFalse: [nil]). sensor waitNoButton. hasUnsavedChanges contents: true.! Item was changed: ----- Method: FormEditor>>deleteRubberBandFrom:to: (in category 'private') ----- deleteRubberBandFrom: startPoint to: endPoint + (DisplayLine from: startPoint to: endPoint withForm: form) - (Line from: startPoint to: endPoint withForm: form) displayOn: Display at: 0 @ 0 clippingBox: view insetDisplayBox rule: Form reverse fillColor: (Display depth = 1 ifTrue: [Color black] ifFalse: [Color gray]).! Item was changed: ----- Method: FormEditor>>line (in category 'editing tools') ----- line + "DisplayLine is specified by two points from the mouse: first point--press red - "Line is specified by two points from the mouse: first point--press red button; second point--release red button. The resultant line is displayed according to the current form and mode." | firstPoint endPoint drawForm | drawForm := form asFormOfDepth: Display depth. Display depth > 1 ifTrue: [drawForm mapColor: Color white to: Color transparent; mapColor: Color black to: color]. firstPoint := self cursorPoint. endPoint := self rubberBandFrom: firstPoint until: [sensor noButtonPressed]. endPoint isNil ifTrue: [^self]. Display depth > 1 ifTrue: [self deleteRubberBandFrom: firstPoint to: endPoint.]. + (DisplayLine from: firstPoint to: endPoint withForm: drawForm) - (Line from: firstPoint to: endPoint withForm: drawForm) displayOn: Display at: 0 @ 0 clippingBox: view insetDisplayBox rule: (Display depth > 1 ifTrue: [mode ~= Form erase ifTrue: [Form paint] ifFalse: [mode]] ifFalse: [mode]) fillColor: (Display depth = 1 ifTrue: [color] ifFalse: [nil]). hasUnsavedChanges contents: true.! Item was changed: ----- Method: FormEditor>>rubberBandFrom:until: (in category 'private') ----- rubberBandFrom: startPoint until: aBlock | endPoint previousEndPoint | previousEndPoint := startPoint. [aBlock value] whileFalse: [(endPoint := self cursorPoint) = previousEndPoint ifFalse: + [(DisplayLine from: startPoint to: previousEndPoint withForm: form) - [(Line from: startPoint to: previousEndPoint withForm: form) displayOn: Display at: 0 @ 0 clippingBox: view insetDisplayBox rule: Form reverse fillColor: Color gray. + (DisplayLine from: startPoint to: endPoint withForm: form) - (Line from: startPoint to: endPoint withForm: form) displayOn: Display at: 0 @ 0 clippingBox: view insetDisplayBox rule: Form reverse fillColor: Color gray. previousEndPoint := endPoint]]. + (DisplayLine from: startPoint to: previousEndPoint withForm: form) - (Line from: startPoint to: previousEndPoint withForm: form) displayOn: Display at: 0 @ 0 clippingBox: view insetDisplayBox rule: Form reverse fillColor: (Display depth = 1 ifTrue: [Color gray] ifFalse: [Color black]). ^endPoint! Item was changed: ----- Method: GraphicSymbolInstance class>>example (in category 'examples') ----- example "Simply evaluate the method and two GraphicSymbolInstances, each displaying a transformation of the same graphic symbol, will be presented on the screen. Clears the screen to white." | gate instance1 instance2 trans1 trans2 line arc f| Display fillWhite. "clear the Screen." f := Form extent: 2 @ 2. f fillBlack. gate:= GraphicSymbol new. "make a logic gate out of lines and arcs." + line:=DisplayLine new. line beginPoint: -20 @ -20. line endPoint: 0 @ -20. line form: f. - line:=Line new. line beginPoint: -20 @ -20. line endPoint: 0 @ -20. line form: f. gate add: line. + line:=DisplayLine new. line beginPoint: -20 @ 20. line endPoint: 0 @ 20. line form: f. - line:=Line new. line beginPoint: -20 @ 20. line endPoint: 0 @ 20. line form: f. gate add: line. + line:=DisplayLine new. line beginPoint: 0 @ -40. line endPoint: 0 @ 40. line form: f. - line:=Line new. line beginPoint: 0 @ -40. line endPoint: 0 @ 40. line form: f. gate add: line. + arc := DisplayArc new. arc center: 0 @ 0 radius: 40 quadrant: 1. - arc := Arc new. arc center: 0 @ 0 radius: 40 quadrant: 1. arc form: f. gate add: arc. + arc := DisplayArc new. arc center: 0 @ 0 radius: 40 quadrant: 4. - arc := Arc new. arc center: 0 @ 0 radius: 40 quadrant: 4. arc form: f. gate add: arc. "one instance at 1/2 scale." trans1:=WindowingTransformation identity. trans1:= trans1 scaleBy: 0.5 @ 0.5. trans1:= trans1 translateBy: 100 @ 100. "the other instance at 2 times scale" trans2:=WindowingTransformation identity. trans2:= trans2 scaleBy: 2.0 @ 2.0. trans2:= trans2 translateBy: 200 @ 200. instance1 := GraphicSymbolInstance new. instance1 transformation: trans1. instance1 graphicSymbol: gate. instance2 := GraphicSymbolInstance new. instance2 transformation: trans2. instance2 graphicSymbol: gate. "display both instances of the logic gate" instance1 displayOn: Display transformation: WindowingTransformation identity clippingBox: Display boundingBox rule: Form under fillColor: nil. instance2 displayOn: Display transformation: WindowingTransformation identity clippingBox: Display boundingBox rule: Form under fillColor: nil "GraphicSymbolInstance example"! Item was removed: - Path subclass: #Line - instanceVariableNames: '' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !Line commentStamp: '<historical>' prior: 0! - I represent the line segment specified by two points.! Item was removed: - ----- Method: Line class>>example (in category 'examples') ----- - example - "Designate two places on the screen by clicking any mouse button. A - straight path with a square black form will be displayed connecting the - two selected points." - - | aLine aForm | - aForm := Form extent: 20@20. "make a form one quarter of inch square" - aForm fillBlack. "turn it black" - aLine := Line new. - aLine form: aForm. "use the black form for display" - aLine beginPoint: Sensor waitButton. Sensor waitNoButton. - aForm displayOn: Display at: aLine beginPoint. - aLine endPoint: Sensor waitButton. - aLine displayOn: Display. "display the line" - - "Line example"! Item was removed: - ----- Method: Line class>>from:to:withForm: (in category 'instance creation') ----- - from: beginPoint to: endPoint withForm: aForm - "Answer an instance of me with end points begingPoint and endPoint; - the source form for displaying the line is aForm." - - | newSelf | - newSelf := super new: 2. - newSelf add: beginPoint. - newSelf add: endPoint. - newSelf form: aForm. - ^newSelf! Item was removed: - ----- Method: Line class>>new (in category 'instance creation') ----- - new - - | newSelf | - newSelf := super new: 2. - newSelf add: 0@0. - newSelf add: 0@0. - ^newSelf! Item was removed: - ----- Method: Line>>beginPoint (in category 'accessing') ----- - beginPoint - "Answer the first end point of the receiver." - - ^self first! Item was removed: - ----- Method: Line>>beginPoint: (in category 'accessing') ----- - beginPoint: aPoint - "Set the first end point of the receiver to be the argument, aPoint. - Answer aPoint." - - self at: 1 put: aPoint. - ^aPoint! Item was removed: - ----- Method: Line>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm - "The form associated with this Path will be displayed, according - to one of the sixteen functions of two logical variables (rule), at - each point on the Line. Also the source form will be first anded - with aForm as a mask. Does not effect the state of the Path." - - collectionOfPoints size < 2 ifTrue: [self error: 'a line must have two points']. - aDisplayMedium - drawLine: self form - from: self beginPoint + aPoint - to: self endPoint + aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm! Item was removed: - ----- Method: Line>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm - - | newPath newLine | - newPath := aTransformation applyTo: self. - newLine := Line new. - newLine beginPoint: newPath firstPoint. - newLine endPoint: newPath secondPoint. - newLine form: self form. - newLine - displayOn: aDisplayMedium - at: 0 @ 0 - clippingBox: clipRect - rule: anInteger - fillColor: aForm! Item was removed: - ----- Method: Line>>displayOnPort:at: (in category 'displaying') ----- - displayOnPort: aPort at: aPoint - aPort sourceForm: self form; combinationRule: Form under; fillColor: nil. - aPort drawFrom: collectionOfPoints first + aPoint - to: collectionOfPoints last + aPoint! Item was removed: - ----- Method: Line>>endPoint (in category 'accessing') ----- - endPoint - "Answer the last end point of the receiver." - - ^self last! Item was removed: - ----- Method: Line>>endPoint: (in category 'accessing') ----- - endPoint: aPoint - "Set the first end point of the receiver to be the argument, aPoint. - Answer aPoint." - - self at: 2 put: aPoint. - ^aPoint! Item was removed: - Path subclass: #LinearFit - instanceVariableNames: '' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !LinearFit commentStamp: '<historical>' prior: 0! - I represent a piece-wise linear approximation to a set of points in the plane.! Item was removed: - ----- Method: LinearFit class>>example (in category 'examples') ----- - example - "Select points on a Path using the red button. Terminate by selecting - any other button. Creates a Path from the points and displays it as a - piece-wise linear approximation." - - | aLinearFit aForm flag | - aLinearFit := LinearFit new. - aForm := Form extent: 1 @ 40. - aForm fillBlack. - aLinearFit form: aForm. - flag := true. - [flag] whileTrue: - [Sensor waitButton. - Sensor redButtonPressed - ifTrue: [aLinearFit add: Sensor waitButton. Sensor waitNoButton. - aForm displayOn: Display at: aLinearFit last] - ifFalse: [flag:=false]]. - aLinearFit displayOn: Display - - "LinearFit example"! Item was removed: - ----- Method: LinearFit>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger - fillColor: aForm - - | line | - line := Line new. - line form: self form. - 1 to: self size - 1 do: - [:i | - line beginPoint: (self at: i). - line endPoint: (self at: i + 1). - line displayOn: aDisplayMedium - at: aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm]! Item was removed: - ----- Method: LinearFit>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: aTransformation clippingBox: - clipRect rule: anInteger fillColor: aForm - - | transformedPath | - "get the scaled and translated Path." - transformedPath := aTransformation applyTo: self. - transformedPath - displayOn: aDisplayMedium - at: 0 @ 0 - clippingBox: clipRect - rule: anInteger - fillColor: aForm! Item was removed: - DisplayObject subclass: #Path - instanceVariableNames: 'form collectionOfPoints' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !Path commentStamp: '<historical>' prior: 0! - I am the abstract superclass of the Graphic spatial primitives. I represent an ordered sequence of Points. Spatial primitives are used to generate "trajectories" such as lines and circles.! Item was removed: - ----- Method: Path class>>example (in category 'examples') ----- - example - "Creates a Path from mousePoints and displays it several ways on the display screen. Messes up the display. For learning about class Path, just select the code below and execute it to create a path and see it redisplayed in another place on the screen. Each path displays using a different form. A path is indicated by pressing the red mouse button in a sequence; press any other mouse button to terminate. " - - | aPath aForm pl fl flag | - aForm := Form extent: 2 @ 40. "creates a form one inch long" - aForm fillBlack. "turns it black" - aPath := Path new. - aPath form: aForm. "use the long black form for displaying" - flag := true. - [flag] - whileTrue: - [Sensor waitButton. - Sensor redButtonPressed - ifTrue: - [aPath add: Sensor waitButton. - Sensor waitNoButton. - aForm displayOn: Display at: aPath last] - ifFalse: [flag := false]]. - Display fillWhite. - aPath displayOn: Display. "the original path" - pl := aPath translateBy: 0 @ 100. - fl := Form extent: 40 @ 40. - fl fillGray. - pl form: fl. - pl displayOn: Display. "the translated path" - Sensor waitNoButton - - "Path example"! Item was removed: - ----- Method: Path class>>new (in category 'instance creation') ----- - new - - ^self basicNew initializeCollectionOfPoints! Item was removed: - ----- Method: Path class>>new: (in category 'instance creation') ----- - new: anInteger - - ^self basicNew initializeCollectionOfPoints: anInteger! Item was removed: - ----- Method: Path>>add: (in category 'adding') ----- - add: aPoint - "Include aPoint as one of the receiver's elements." - - ^collectionOfPoints add: aPoint! Item was removed: - ----- Method: Path>>at: (in category 'accessing') ----- - at: index - "Answer the point on the receiver's path at position index." - - ^collectionOfPoints at: index! Item was removed: - ----- Method: Path>>at:put: (in category 'accessing') ----- - at: index put: aPoint - "Store the argument, aPoint, as the point on the receiver's path at position - index." - - ^collectionOfPoints at: index put: aPoint! Item was removed: - ----- Method: Path>>collect: (in category 'enumerating') ----- - collect: aBlock - "Evaluate aBlock with each of the receiver's elements as the argument. - Collect the resulting values into a path that is like the receiver. Answer - the new path." - - | newCollection | - newCollection := collectionOfPoints collect: aBlock. - newCollection form: self form. - ^newCollection! Item was removed: - ----- Method: Path>>computeBoundingBox (in category 'display box access') ----- - computeBoundingBox - "Refer to the comment in DisplayObject|computeBoundingBox." - - | box | - box := Rectangle origin: (self at: 1) extent: 0 @ 0. - collectionOfPoints do: - [:aPoint | box swallow: (Rectangle origin: aPoint extent: 0 @ 0)]. - ^box! Item was removed: - ----- Method: Path>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aDisplayPoint clippingBox: clipRectangle rule: ruleInteger fillColor: aForm - "Display this Path--offset by aPoint, clipped by clipRect and the form - associated with this Path will be displayedr according to one of the sixteen - functions of two logical variables (rule). Also the source form will be first - anded with aForm as a mask. Does not effect the state of the Path" - - collectionOfPoints do: - [:element | - self form - displayOn: aDisplayMedium - at: element + aDisplayPoint - clippingBox: clipRectangle - rule: ruleInteger - fillColor: aForm]! Item was removed: - ----- Method: Path>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: displayTransformation clippingBox: clipRectangle rule: ruleInteger fillColor: aForm - "Displays this path, translated and scaled by aTransformation. Get the - scaled and translated Path." - - | newPath transformedPath | - transformedPath := displayTransformation applyTo: self. - newPath := Path new. - transformedPath do: [:point | newPath add: point]. - newPath form: self form. - newPath - displayOn: aDisplayMedium - at: 0 @ 0 - clippingBox: clipRectangle - rule: ruleInteger - fillColor: aForm! Item was removed: - ----- Method: Path>>first (in category 'accessing') ----- - first - "Answer the first point on the receiver's path; included to correspond to - OrderedCollection protocol." - - ^collectionOfPoints first! Item was removed: - ----- Method: Path>>firstPoint (in category 'accessing') ----- - firstPoint - "Answer the first point on the receiver's path." - - ^collectionOfPoints first! Item was removed: - ----- Method: Path>>firstPoint: (in category 'accessing') ----- - firstPoint: aPoint - "Replace the first element of the receiver with the new value aPoint. - Answer the argument aPoint." - - collectionOfPoints at: 1 put: aPoint. - ^aPoint! Item was removed: - ----- Method: Path>>form (in category 'accessing') ----- - form - "Answer the receiver's form, or, if form is nil, then answer a 1 x 1 black - form (a black dot)." - - | aForm | - form == nil - ifTrue: - [aForm := Form extent: 1 @ 1. - aForm fillBlack. - ^aForm] - ifFalse: - [^form]! Item was removed: - ----- Method: Path>>form: (in category 'accessing') ----- - form: aForm - "Make the argument, aForm, be the receiver's form." - - form := aForm! Item was removed: - ----- Method: Path>>initializeCollectionOfPoints (in category 'private') ----- - initializeCollectionOfPoints - - collectionOfPoints := OrderedCollection new! Item was removed: - ----- Method: Path>>initializeCollectionOfPoints: (in category 'private') ----- - initializeCollectionOfPoints: anInteger - - collectionOfPoints := OrderedCollection new: anInteger! Item was removed: - ----- Method: Path>>isEmpty (in category 'testing') ----- - isEmpty - - ^collectionOfPoints isEmpty! Item was removed: - ----- Method: Path>>last (in category 'accessing') ----- - last - "Answer the last point on the receiver's path; included to correspond to - OrderedCollection protocol." - - ^collectionOfPoints last! Item was removed: - ----- Method: Path>>offset (in category 'accessing') ----- - offset - "There are basically two kinds of display objects in the system: those - that, when asked to transform themselves, create a new object; and those - that side effect themselves by maintaining a record of the transformation - request (typically an offset). Path, like Rectangle and Point, is a display - object of the first kind." - - self shouldNotImplement! Item was removed: - ----- Method: Path>>removeAllSuchThat: (in category 'removing') ----- - removeAllSuchThat: aBlock - "Evaluate aBlock for each element of the receiver. - Remove each element for which aBlock evaluates to true." - - collectionOfPoints removeAllSuchThat: aBlock. - ! Item was removed: - ----- Method: Path>>scaleBy: (in category 'transforming') ----- - scaleBy: aPoint - "Answers a new Path scaled by aPoint. Does not affect the current data in - this Path." - - | newPath | - newPath := self species new: self size. - newPath form: self form. - collectionOfPoints do: [:element | newPath add: (element scaleBy: aPoint)]. - ^newPath! Item was removed: - ----- Method: Path>>secondPoint (in category 'accessing') ----- - secondPoint - "Answer the second element of the receiver." - - ^collectionOfPoints at: 2! Item was removed: - ----- Method: Path>>secondPoint: (in category 'accessing') ----- - secondPoint: aPoint - "Replace the second element of the receiver with the new value aPoint. - Answer the argument aPoint." - - collectionOfPoints at: 2 put: aPoint. - ^aPoint! Item was removed: - ----- Method: Path>>select: (in category 'enumerating') ----- - select: aBlock - "Evaluate aBlock with each of the receiver's elements as the argument. - Collect into a new path like the receiver only those elements for which - aBlock evaluates to true. Answer the new path." - - | newCollection | - newCollection := collectionOfPoints select: aBlock. - newCollection form: self form. - ^newCollection! Item was removed: - ----- Method: Path>>size (in category 'accessing') ----- - size - "Answer the length of the receiver." - - ^collectionOfPoints size! Item was removed: - ----- Method: Path>>thirdPoint (in category 'accessing') ----- - thirdPoint - "Answer the third element of the receiver." - - ^collectionOfPoints at: 3! Item was removed: - ----- Method: Path>>thirdPoint: (in category 'accessing') ----- - thirdPoint: aPoint - "Replace the third element of the receiver with the new value aPoint. - Answer the argument aPoint." - - collectionOfPoints at: 3 put: aPoint. - ^aPoint! Item was removed: - ----- Method: Path>>translateBy: (in category 'transforming') ----- - translateBy: aPoint - "Answers a new Path whose elements are translated by aPoint. Does not - affect the elements of this Path." - - | newPath | - newPath := self species new: self size. - newPath form: self form. - collectionOfPoints do: [:element | newPath add: (element translateBy: aPoint)]. - ^newPath! Item was removed: - Path subclass: #Spline - instanceVariableNames: 'coefficients' - classVariableNames: '' - poolDictionaries: '' - category: 'ST80-Paths'! - - !Spline commentStamp: '<historical>' prior: 0! - I represent a collection of Points through which a cubic spline curve is fitted.! Item was removed: - ----- Method: Spline class>>example (in category 'examples') ----- - example - "Designate points on the Path by clicking the red button. Terminate by - pressing any other button. A curve will be displayed, through the - selected points, using a long black form." - - | splineCurve aForm flag| - aForm := Form extent: 2@2. - aForm fillBlack. - splineCurve := Spline new. - splineCurve form: aForm. - flag := true. - [flag] whileTrue: - [Sensor waitButton. - Sensor redButtonPressed - ifTrue: - [splineCurve add: Sensor waitButton. - Sensor waitNoButton. - aForm displayOn: Display at: splineCurve last] - ifFalse: [flag:=false]]. - splineCurve computeCurve. - splineCurve isEmpty - ifFalse: [splineCurve displayOn: Display. - Sensor waitNoButton]. - - "Spline example"! Item was removed: - ----- Method: Spline>>coefficients (in category 'accessing') ----- - coefficients - "Answer an eight-element Array of Arrays each of which is the length - of the receiver. The first four arrays are the values, first, second and - third derivatives, respectively, for the parametric spline in x. The last - four elements are for y." - - ^coefficients! Item was removed: - ----- Method: Spline>>computeCurve (in category 'displaying') ----- - computeCurve - "Compute an array for the coefficients." - - | length extras | - length := self size. - extras := 0. - coefficients := Array new: 8. - 1 to: 8 do: [:i | coefficients at: i put: (Array new: length + extras)]. - 1 to: 5 by: 4 do: - [:k | - 1 to: length do: - [:i | (coefficients at: k) - at: i put: (k = 1 - ifTrue: [(self at: i) x asFloat] - ifFalse: [(self at: i) y asFloat])]. - 1 to: extras do: [:i | (coefficients at: k) - at: length + i put: ((coefficients at: k) - at: i + 1)]. - self derivs: (coefficients at: k) - first: (coefficients at: k + 1) - second: (coefficients at: k + 2) - third: (coefficients at: k + 3)]. - extras > 0 - ifTrue: [1 to: 8 do: - [:i | - coefficients at: i put: ((coefficients at: i) - copyFrom: 2 to: length + 1)]]! Item was removed: - ----- Method: Spline>>derivs:first:second:third: (in category 'private') ----- - derivs: a first: point1 second: point2 third: point3 - "Compute the first, second and third derivitives (in coefficients) from - the Points in this Path (coefficients at: 1 and coefficients at: 5)." - - | l v anArray | - l := a size. - l < 2 ifTrue: [^self]. - l > 2 - ifTrue: - [v := Array new: l. - v at: 1 put: 4.0. - anArray := Array new: l. - anArray at: 1 put: (6.0 * ((a at: 1) - ((a at: 2) * 2.0) + (a at: 3))). - 2 to: l - 2 do: - [:i | - v at: i put: (4.0 - (1.0 / (v at: (i - 1)))). - anArray - at: i - put: (6.0 * ((a at: i) - ((a at: (i + 1)) * 2.0) + (a at: (i + 2))) - - ((anArray at: (i - 1)) / (v at: (i - 1))))]. - point2 at: (l - 1) put: ((anArray at: (l - 2)) / (v at: (l - 2))). - l - 2 to: 2 by: 0-1 do: - [:i | - point2 - at: i - put: ((anArray at: (i - 1)) - (point2 at: (i + 1)) / (v at: (i - 1)))]]. - point2 at: 1 put: (point2 at: l put: 0.0). - 1 to: l - 1 do: - [:i | point1 - at: i - put: ((a at: (i + 1)) - (a at: i) - - ((point2 at: i) * 2.0 + (point2 at: (i + 1)) / 6.0)). - point3 at: i put: ((point2 at: (i + 1)) - (point2 at: i))]! Item was removed: - ----- Method: Spline>>displayOn:at:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium at: aPoint clippingBox: clipRect rule: anInteger fillColor: aForm - "Display the receiver, a spline curve, approximated by straight line - segments." - - | n line t x y x1 x2 x3 y1 y2 y3 | - collectionOfPoints size < 1 ifTrue: [self error: 'a spline must have at least one point']. - line := Line new. - line form: self form. - line beginPoint: - (x := (coefficients at: 1) at: 1) rounded @ (y := (coefficients at: 5) at: 1) rounded. - 1 to: (coefficients at: 1) size - 1 do: - [:i | - "taylor series coefficients" - x1 := (coefficients at: 2) at: i. - y1 := (coefficients at: 6) at: i. - x2 := ((coefficients at: 3) at: i) / 2.0. - y2 := ((coefficients at: 7) at: i) / 2.0. - x3 := ((coefficients at: 4) at: i) / 6.0. - y3 := ((coefficients at: 8) at: i) / 6.0. - "guess n" - n := 5 max: (x2 abs + y2 abs * 2.0 + ((coefficients at: 3) - at: i + 1) abs + ((coefficients at: 7) - at: i + 1) abs / 100.0) rounded. - 1 to: n - 1 do: - [:j | - t := j asFloat / n. - line endPoint: - (x3 * t + x2 * t + x1 * t + x) rounded - @ (y3 * t + y2 * t + y1 * t + y) rounded. - line - displayOn: aDisplayMedium - at: aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm. - line beginPoint: line endPoint]. - line beginPoint: - (x := (coefficients at: 1) at: i + 1) rounded - @ (y := (coefficients at: 5) at: i + 1) rounded. - line - displayOn: aDisplayMedium - at: aPoint - clippingBox: clipRect - rule: anInteger - fillColor: aForm]! Item was removed: - ----- Method: Spline>>displayOn:transformation:clippingBox:rule:fillColor: (in category 'displaying') ----- - displayOn: aDisplayMedium transformation: aTransformation clippingBox: clipRect rule: anInteger fillColor: aForm - "Get the scaled and translated path of newKnots." - - | newKnots newSpline | - newKnots := aTransformation applyTo: self. - newSpline := Spline new. - newKnots do: [:knot | newSpline add: knot]. - newSpline form: self form. - newSpline - displayOn: aDisplayMedium - at: 0 @ 0 - clippingBox: clipRect - rule: anInteger - fillColor: aForm!

4 5

laptops, secondary monitors and projects...
by Eliot Miranda 08 Jul '22

08 Jul '22

Hi All, I use a lot of projects, and tend to keep one or two images for a long time. [tangent: I use two images so I can develop in one, using Vanessa's superb partial commit feature, load the clean packages in the second image, and generate VM sources from there. This allows me to have uncommitted changes in my main work image.] The only glitch in this perfect world is the tension of moving between my large secondary monitor, my standard work context, and the laptop screen, which occurs when I want to work away from home. The image on the secondary monitor is set up with windows laid out according to its dimensions. When I start the image on the laptop away from the secondary monitor it of course doesn't fit. So how about a preference that - remember's a project's screen extent when it last had a window laid out in it, or perhaps remembers the minimum rectangle enclosing all the windows in the project - on launch (effectively an entry into the current project) and/or entry into a project, if the screen extent is substantially smaller than the project's saved screen extent, all windows are scaled by the transformation from the original to the current size, i.e. they all get smaller and move towards the origin. _,,,^..^,,,_ best, Eliot

3 3

SequenceableCollection #= method in current trunk differs from Squeak 5.2
by Nikolay Suslov 07 Jul '22

07 Jul '22

Hello all, Figuring out, could we go back to the previous version of SequenceableCollection #= method (as in Squeak 5.2), to check if the receiver is equivalent to the otherCollection by using "self species == otherCollection species", instead of "self class = otherCollection class"? The current version of #= method breaks code in different places. For example the RFB/VNC server gives wrong results starting from an authentication process, where RFBMessage is the ByteArray subclass and implements #species. Best regards, Nikolai

9 18

The Inbox: ToolBuilder-Morphic-cbc.270.mcz
by commits＠source.squeak.org 07 Jul '22

07 Jul '22

A new version of ToolBuilder-Morphic was added to project The Inbox: http://source.squeak.org/inbox/ToolBuilder-Morphic-cbc.270.mcz ==================== Summary ==================== Name: ToolBuilder-Morphic-cbc.270 Author: cbc Time: 8 January 2021, 11:27:47.8204 am UUID: abbbeb8a-9a8b-ef4a-b6a9-051b55cc2d5b Ancestors: ToolBuilder-Morphic-mt.269 Set the initial extent of the ListChooser to not require resizing the dialog for reasonable sized lists (i.e., expand it so you can see all of the list). At the small end, still object MT's suggested size; at the large end, will not take up more the 3/4ths of the world size. =============== Diff against ToolBuilder-Morphic-mt.269 =============== Item was changed: ----- Method: ListChooser>>initialExtent (in category 'building') ----- initialExtent + | listFont width height | - - | listFont | listFont := Preferences standardListFont. + width := (items collect: [:item| listFont widthOfString: item]) max + 20 "Acutal size of items plus dialog buffer left/right" + max: (20 * (listFont widthOf: $m)). "but we want a not-too-small box as well" + height := ((items size max: 15) * listFont height) + 40. "for various other stuff in dialog above/below list" + "But, don't use the whole world." + width := width min: (self currentWorld extent x * 0.75) asInteger. + height := height min: (self currentWorld extent y * 0.75) asInteger. + ^ width@height! - ^ (20 * (listFont widthOf: $m))@(15 * listFont height)!

3 7

`ensure:` ... doesn't (in some circumstances involving nesting `ensure:` blocks in `ensure:` handlers).
by Tony Garnock-Jones 07 Jul '22

07 Jul '22

Here's an example of where `ensure:` doesn't quite do what it says on the tin: [ [Processor activeProcess terminate] ensure: [ Transcript cr; show: 'outer1'. [nil error: 'aiee'] ensure: [Transcript cr; show: 'inner']. Transcript cr; show: 'outer2'. ] ] fork Expected output: outer1 (debugger appears; click 'abandon') inner (or possibly: outer1 (debugger appears; click 'abandon') inner outer2 which is what you get if you change "Processor activeProcess terminate" to "1 + 2" above... but this also seems odd.) Actual output: outer1 (no debugger appears, nothing more happens) Are my expectations out-of-line, or is there a problem worth investigating here? "--" I think it's worth noting that a related program: [ [Processor activeProcess terminate] ensure: [ [ Transcript cr; show: 'outer1'. [nil error: 'aiee'] ensure: [ Transcript cr; show: 'inner']. Transcript cr; show: 'outer2'. ] on: Error do: [:ex | Transcript cr; show: ex] ] ] fork yields the reasonable output outer1 Error: aiee inner Cheers, Tony

6 6

Squeak VM & image package/bundle building?
by tim Rowledge 07 Jul '22

07 Jul '22

We obviously have some system in place that produces the downloadable packages containing the vm & image etc. I haven't so far successfully googled anything that usefully helps me understand *how*. What is the current build setup for these things? Do we have to run platform specific jobs or is it practical to have a single system? I'm interested in how one might build a Mac bundle, for example, that might have a custom name, icons, image file, other resources. I recall some quite long threads about the joy of signing Mac application bundles too. And can Mac & Windows applications run without open windows these days? Again, I recall interesting issues with this years ago but nothing from more recent times. Imagine I want to run a Seaside server; no open windows, write errors to a suitable log, stuff like that. tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim Useful Latin Phrases:- Furnulum pani nolo = I don't want a toaster.

2 1

A bug in #releaseCriticalSection: preventing correct unwind (in rare situations)
by mail＠jaromir.net 07 Jul '22

07 Jul '22

--==CelesteAttachment21924== Content-type: text/plain;charset=UTF-8 Hi Eliot, all, There's a bug, or rather an omission, in #releaseCriticalSection: causing the following examples unwind incorrectly: Mutex new inspect critical: [self halt] If you run the example in a workspace, a debugger and an inspector opens - please watch Mutex's 'owner' variable; then step into a few times to get right before sending #primitiveExitCriticalSection and terminate the debugger (in the newest images please use debugger's window menu -> terminate process); and observe the owner won't get cleared and will remain blocking the Mutex. Same behavior for Semaphores: Semaphore forMutualExclusion inspect critical: [self halt] Again, watch Semaphore's excessSignals variable in the Inspector, step into a few times until you stand before sending #signal - and terminate the debugged process (from the debuggers menu or from the Process Browser if you like) - the Semaphore won't recharge excessSignals back to 1. The root cause is #releaseCriticalSection: doesn't account for terminating in this particular position of the computation. It can be fixed e.g. by adding an additional condition ('progressedIntoEnsure') - try the examples with the enclosed changeset; both Mutexes and Semaphores work ok now. Best, ~~~ ^[^ Jaromir Sent from Squeak Inbox Talk ["Process-releaseCriticalSection.st"] --==CelesteAttachment21924== Content-transfer-encoding: base64 Content-disposition: attachment;filename="Process-releaseCriticalSection.st" Content-type: application/octet-stream;name="Process-releaseCriticalSection.st" J0Zyb20gU3F1ZWFrNi4wYWxwaGEgb2YgMTcgRGVjZW1iZXIgMjAyMSBbbGF0ZXN0IHVwZGF0 ZTogIzIwODgwXSBvbiAyMSBEZWNlbWJlciAyMDIxIGF0IDY6MDQgcG0nIQ0NIVByb2Nlc3Mg bWV0aG9kc0ZvcjogJ3ByaXZhdGUnIHN0YW1wOiAnamFyIDEyLzIxLzIwMjEgMTY6MzUnIQ1y ZWxlYXNlQ3JpdGljYWxTZWN0aW9uOiBydW5uYWJsZQ0JIkZpZ3VyZSBvdXQgaWYgd2UgYXJl IHRlcm1pbmF0aW5nIGEgcHJvY2VzcyB0aGF0IGlzIGluIHRoZSBlbnN1cmU6IGJsb2NrIG9m IGEgY3JpdGljYWwgc2VjdGlvbi4NCSBJbiB0aGlzIGNhc2UsIGlmIHRoZSBibG9jayBoYXMg bWFkZSBwcm9ncmVzcywgcG9wIHRoZSBzdXNwZW5kZWRDb250ZXh0IHNvIHRoYXQgd2UgbGVh dmUgdGhlDQkgZW5zdXJlOiBibG9jayBpbnNpZGUgdGhlIGNyaXRpY2FsOiB3aXRob3V0IHNp Z25hbGluZyB0aGUgc2VtYXBob3JlL2V4aXRpbmcgdGhlIHByaW1pdGl2ZSBzZWN0aW9uLA0J IHNpbmNlIHByZXN1bWFibHkgdGhpcyBoYXMgYWxyZWFkeSBoYXBwZW5lZC4gIEJ1dCBpZiBp dCBoYXNuJ3QgbWFkZSBwcm9ncmVzcyBidXQgaXMgYmV5b25kIHRoZQ0JIHdhaXQgKHdoaWNo IHdlIGNhbiB0ZWxsIGJ5IHRoZSBvbGRMaXN0IGJlaW5nIG9uZSBvZiB0aGUgcnVubmFibGUg bGlzdHMsIGkuZS4gYSBMaW5rZWRMaXN0LCBub3QgYQ0JIFNlbWFwaG9yZSBvciBNdXRleCwg ZXQgYWwpLCB0aGVuIHRoZSBlbnN1cmU6IGJsb2NrIG5lZWRzIHRvIGJlIHJ1bi4iDQl8IHNl bGVjdG9ySnVzdFNlbnQgfA0JKHN1c3BlbmRlZENvbnRleHQgbWV0aG9kIHByYWdtYUF0OiAj Y3JpdGljYWxTZWN0aW9uKSBpZk5pbDogW15zZWxmXS4NCXNlbGVjdG9ySnVzdFNlbnQgOj0g c3VzcGVuZGVkQ29udGV4dCBzZWxlY3Rvckp1c3RTZW50T3JTZWxmLg0NCSJSZWNlaXZlciBh bmQvb3IgYXJndW1lbnQgYmxvY2tzIG9mIGVuc3VyZTogaW4gU2VtYXBob3JlPj5jcml0aWNh bDogb3IgTXV0ZXg+PiNjcml0aWNhbDoiDQlzdXNwZW5kZWRDb250ZXh0IGlzQ2xvc3VyZUNv bnRleHQgaWZUcnVlOg0JCVtzdXNwZW5kZWRDb250ZXh0IHNlbmRlciBpc1Vud2luZENvbnRl eHQgaWZUcnVlOg0JCQlbfCBub3RXYWl0aW5nQnV0TWFkZU5vUHJvZ3Jlc3MgcHJvZ3Jlc3Nl ZEludG9FbnN1cmUgfA0JCQkiQXZvaWQgcnVubmluZyB0aGUgZW5zdXJlOiBibG9jayB0d2lj ZSwgcG9wcGluZyBpdCBpZiBpdCBoYXMgYWxyZWFkeSBiZWVuIHJ1bi4gSWYgcnVubmFibGUN CQkJIGJ1dCBhdCB0aGUgd2FpdCwgbGVhdmUgaXQgaW4gcGxhY2UuIE4uQi4gTm8gbmVlZCB0 byBjaGVjayBpZiB0aGUgYmxvY2sgcmVjZWl2ZXIgb2YgZW5zdXJlOiBoYXMNCQkJIG5vdCBz dGFydGVkIHRvIHJ1biAodmlhIHN1c3BlbmRlZENvbnRleHQgcGMgPSBzdXNwZW5kZWRDb250 ZXh0IHN0YXJ0cGMpIGJlY2F1c2UgZW5zdXJlOg0JCQkgdXNlcyB2YWx1ZU5vQ29udGV4dFN3 aXRjaCwgYW5kIHNvIHRoZXJlIGlzIG5vIHN1c3BlbnNpb24gcG9pbnQgYmVmb3JlIHRoZSB3 YWl0LiINCQkJIG5vdFdhaXRpbmdCdXRNYWRlTm9Qcm9ncmVzcyA6PQ0JCQkJcnVubmFibGUN CQkJCWFuZDogW3NlbGVjdG9ySnVzdFNlbnQgPT0gI3dhaXQNCQkJCWFuZDogW3N1c3BlbmRl ZENvbnRleHQgc2VuZGVyIHNlbGVjdG9ySnVzdFNlbnRPclNlbGYgPT0gI3ZhbHVlTm9Db250 ZXh0U3dpdGNoXV0uDQkJCSBwcm9ncmVzc2VkSW50b0Vuc3VyZSA6PQ0JCQkJcnVubmFibGUN CQkJCWFuZDogW3N1c3BlbmRlZENvbnRleHQgc2VuZGVyIHNlbGVjdG9ySnVzdFNlbnRPclNl bGYgPT0gI3ZhbHVlXS4NCQkJIChub3RXYWl0aW5nQnV0TWFkZU5vUHJvZ3Jlc3Mgb3I6IFtw cm9ncmVzc2VkSW50b0Vuc3VyZV0pIGlmRmFsc2U6DQkJCQlbc3VzcGVuZGVkQ29udGV4dCA6 PSBzdXNwZW5kZWRDb250ZXh0IGhvbWVdXS4NCQkgXnNlbGZdLg0NCSJFaXRoZXIgU2VtYXBo b3JlPj5jcml0aWNhbDogb3IgTXV0ZXg+PiNjcml0aWNhbDouICBJcyB0aGUgcHJvY2VzcyBz dGlsbCBibG9ja2VkPyAgSWYgc28sIG5vdGhpbmcgZnVydGhlciB0byBkby4iDQlydW5uYWJs ZSBpZkZhbHNlOiBbXnNlbGZdLg0NCSJJZiBzdGlsbCBhdCB0aGUgd2FpdCB0aGUgZW5zdXJl OiBibG9jayBoYXMgbm90IGJlZW4gYWN0aXZhdGVkLCBzbyBzaWduYWwgdG8gcmVzdG9yZS4i DQlzZWxlY3Rvckp1c3RTZW50ID09ICN3YWl0IGlmVHJ1ZToNCQlbc3VzcGVuZGVkQ29udGV4 dCByZWNlaXZlciBzaWduYWxdLg0NCSJJZiBzdGlsbCBhdCB0aGUgbG9jayBwcmltaXRpdmUg YW5kIHRoZSBsb2NrIHByaW1pdGl2ZSBqdXN0IGFjcXVpcmVkIG93bmVyc2hpcCAoaW5kaWNh dGVkIGJ5IGl0IGFuc3dlcmluZyBmYWxzZSkNCSB0aGVuIHRoZSBlbnN1cmUgYmxvY2sgaGFz IG5vdCBiZWVuIGFjdGl2YXRlZCwgc28gZXhwbGljaXRseSBwcmltaXRpdmVFeGl0Q3JpdGlj YWxTZWN0aW9uIHRvIHVubG9jay4iDQkoc2VsZWN0b3JKdXN0U2VudCA9PSAjcHJpbWl0aXZl RW50ZXJDcml0aWNhbFNlY3Rpb24NCSBvcjogW3NlbGVjdG9ySnVzdFNlbnQgPT0gI3ByaW1p dGl2ZVRlc3RBbmRTZXRPd25lcnNoaXBPZkNyaXRpY2FsU2VjdGlvbl0pIGlmVHJ1ZToNCQlb KHN1c3BlbmRlZENvbnRleHQgc3RhY2tQdHIgPiAwDQkJICBhbmQ6IFtzdXNwZW5kZWRDb250 ZXh0IHRvcCA9PSBmYWxzZV0pIGlmVHJ1ZToNCQkJW3N1c3BlbmRlZENvbnRleHQgcmVjZWl2 ZXIgcHJpbWl0aXZlRXhpdENyaXRpY2FsU2VjdGlvbl1dISAhDQ== --==CelesteAttachment21924==-- --=--

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Monticello Repositories
by Eliot Miranda 07 Jul '22

07 Jul '22

Hi all, I want to add and satisfy two requirements for Monticello repositories. The first is that - there is a page on squeak.org that describes how to set up a Monticello repository and either points to the code necessary to build a Monticello repository image, or points to downloadable Monticello repository image & changes files. There is at least two paragraphs on Monticello in the Welcome workspace/Help tool that cover its general power (distributed VCS that can work fully disconnected) and how easy it is to set up. The second is that repositories and repository inspectors are extended to include the equivalent of a README.md, a top-level readme for the entire repository, in which repository maintainers can give high-level, lay-of-the-land information. The README would appear at the top of the list of packages in a repository inspector. The first requirement is for developers who wish to set up private and/or personal Monticello repositories. This is easy to do, but only if one knows how. Currently that information is missing from squeak.org and the Welcome workspace/Help tool. The second requirement is to make loading code from repositories easier. I just had to ask Levente how to load a full configuration from the Cryptography repository because there is no where in the repository, visible from within the image, specifically visible from a repository inspector, to get this info. Can we make this so? _,,,^..^,,,_ (phone)

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The Trunk: Tools-tpr.1008.mcz
by commits＠source.squeak.org 22 Jun '22

22 Jun '22

tim Rowledge uploaded a new version of Tools to project The Trunk: http://source.squeak.org/trunk/Tools-tpr.1008.mcz ==================== Summary ==================== Name: Tools-tpr.1008 Author: tpr Time: 25 October 2020, 5:52:09.007789 pm UUID: 2ebe15ce-0c25-4b8d-b993-f1c51203dee5 Ancestors: Tools-tpr.1003, Tools-mt.1007 Rework the window label handing of MessageSet/Trace to be a bit more accurate, and to work within the normal style of labels. Instead of assuming the size of the list passed to the MessageSet/Trace is correct, derive it from the post-processing list. We process the list to remove duplicates, which e.g. the #allUnimplementedCalls method produces. This required adding an instvar to M-Set, removing one from M-Trace, setting the new one properly, dumping some dodgy code that used to half-assedly derive the old one, use the proper #changed: #windowTitle to, y'know, change the title, and some faffing with the messageList. As a result we are better placed to make further improvements if/when we develop a way to correctly hightlight multi-part keywords (or indeed, multiple messages) within a single method, which would greatly improve many browsers. This benefits from being accompanied by the single-method change in the System-tpr.1181 package =============== Diff against Tools-mt.1007 =============== Item was changed: CodeHolder subclass: #MessageSet + instanceVariableNames: 'growable messageList messageListFormatted autoSelectString messageListIndex editSelection windowLabel' - instanceVariableNames: 'growable messageList messageListFormatted autoSelectString messageListIndex editSelection' classVariableNames: 'UseUnifiedMessageLabels' poolDictionaries: '' category: 'Tools-Browser'! !MessageSet commentStamp: '<historical>' prior: 0! I represent a query path of the retrieval result of making a query about methods in the system. The result is a set of methods, denoted by a message selector and the class in which the method was found. As a StringHolder, the string I represent is the source code of the currently selected method. I am typically viewed in a Message Set Browser consisting of a MessageListView and a BrowserCodeView.! Item was changed: ----- Method: MessageSet class>>openMessageList:name:autoSelect: (in category 'instance creation') ----- openMessageList: messageList name: labelString autoSelect: autoSelectString "Open a system view for a MessageSet on messageList. + The labelString is passed to the model to use as a base label, depending on the selection state" - 1/24/96 sw: the there-are-no msg now supplied by my sender" | messageSet | messageSet := self messageList: messageList. + messageSet + autoSelectString: autoSelectString; + setInitialLabel: labelString. + ^ToolBuilder open: messageSet! - messageSet autoSelectString: autoSelectString. - ^ToolBuilder open: messageSet label: labelString! Item was changed: ----- Method: MessageSet>>adjustWindowTitleAfterFiltering (in category 'private') ----- adjustWindowTitleAfterFiltering + "Set the title of the receiver's window, if any, to reflect the just-completed filtering. Avoid re-doing it if fitering is re-done" - "Set the title of the receiver's window, if any, to reflect the just-completed filtering" + (windowLabel endsWith: 'Filtered') + ifFalse: [windowLabel := windowLabel , ' Filtered'. + self changed: #windowTitle]! - | aWindow existingLabel newLabel | - - (aWindow := self containingWindow) ifNil: [^ self]. - (existingLabel := aWindow label) isEmptyOrNil ifTrue: [^ self]. - (((existingLabel size < 3) or: [existingLabel last ~~ $]]) or: [(existingLabel at: (existingLabel size - 1)) isDigit not]) ifTrue: [^ self]. - existingLabel size to: 1 by: -1 do: - [:anIndex | ((existingLabel at: anIndex) == $[) ifTrue: - [newLabel := (existingLabel copyFrom: 1 to: anIndex), - 'Filtered: ', - messageList size printString, - ']'. - ^ aWindow setLabel: newLabel]] - - - ! Item was changed: ----- Method: MessageSet>>initializeMessageList: (in category 'private') ----- initializeMessageList: anArray "Initialize my messageList from the given list of MethodReference or string objects. NB: special handling for uniclasses. Do /not/ replace the elements of anArray if they are already MethodReferences, so as to allow users to construct richer systems, such as differencers between existing and edited versions of code." + messageList := Set new. - messageList := OrderedCollection new. anArray do: [:each | each isMethodReference + ifTrue: [messageList add: each] - ifTrue: [messageList addLast: each] ifFalse: [ MessageSet parse: each toClassAndSelector: + [ : class : sel | class ifNotNil: [ messageList add: (MethodReference class: class selector: sel) ] ] ] ]. + messageList := messageList asOrderedCollection sort. - [ : class : sel | class ifNotNil: [ messageList addLast: (MethodReference class: class selector: sel) ] ] ] ]. "Unify labels if wanted." self class useUnifiedMessageLabels ifTrue: [ messageList withIndexDo: [ : each : index | | cls | cls := each actualClass. each stringVersion: (self indentionPrefixOfSize: (self indentionsIn: each stringVersion)) , (cls ifNil: [each asString] ifNotNil: [cls isUniClass ifTrue: [cls typicalInstanceName, ' ', each selector] ifFalse: [ cls name , ' ' , each selector , ' {' , ((cls organization categoryOfElement: each selector) ifNil: ['']) , '}' , ' {', cls category, '}' ] ]) ] ]. messageListIndex := messageList isEmpty ifTrue: [0] ifFalse: [1]. contents := String empty! Item was changed: ----- Method: MessageSet>>messageListIndex: (in category 'message list') ----- messageListIndex: anInteger + "Set the index of the selected item to be anInteger. + Update the message list morph, the text edit morph and the assorted buttons" - "Set the index of the selected item to be anInteger." messageListIndex := anInteger. contents := messageListIndex ~= 0 ifTrue: [self selectedMessage] ifFalse: ['']. self changed: #messageListIndex. "update my selection" self editSelection: #editMessage. self contentsChanged. (messageListIndex ~= 0 and: [ autoSelectString notNil and: [ self contents notEmpty ] ]) ifTrue: [ self changed: #autoSelect ]. self decorateButtons ! Item was added: + ----- Method: MessageSet>>setInitialLabel: (in category 'accessing') ----- + setInitialLabel: aString + "set the base label for the window, as returned by #windowTitle" + + windowLabel := aString! Item was added: + ----- Method: MessageSet>>windowTitle (in category 'user interface') ----- + windowTitle + "just return the basic label for now" + + ^windowLabel! Item was changed: MessageSet subclass: #MessageTrace + instanceVariableNames: 'autoSelectStrings messageSelections anchorIndex' - instanceVariableNames: 'autoSelectStrings messageSelections anchorIndex defaultSelectString' classVariableNames: '' poolDictionaries: '' category: 'Tools-Browser'! !MessageTrace commentStamp: 'cmm 3/2/2010 20:26' prior: 0! A MessageTrace is a MessageSet allowing efficient sender/implementor message following. With implementors indented below, and senders outdended above, message flow is succinctly expressed, hierarchically. My autoSelectStrings and messageSelections are Arrays of Booleans, parallel to my messageList. Each boolean indicates whether that message is selected. Each autoSelectStrings indicates which string should be highlighted in the code for each method in my messageList.! Item was changed: ----- Method: MessageTrace>>browseAllImplementorsOf: (in category 'actions') ----- browseAllImplementorsOf: selectorSymbol | selectorToBrowse | selectorToBrowse := self selection ifNil: [ selectorSymbol ] + ifNotNil: [ self getImplementorNamed: selectorSymbol asSymbol "since we can get passed literals"]. - ifNotNil: [ self getImplementorNamed: selectorSymbol ]. (self hasUnacceptedEdits or: [ Preferences traceMessages not ]) ifTrue: [ super browseAllImplementorsOf: selectorToBrowse ] ifFalse: [ self addChildMethodsNamed: selectorToBrowse ] ! Item was changed: ----- Method: MessageTrace>>initializeMessageList: (in category 'private initializing') ----- initializeMessageList: anArray - messageSelections := (Array new: anArray size withAll: false) asOrderedCollection. super initializeMessageList: anArray. + messageSelections := (Array new: messageList size withAll: false) asOrderedCollection. self messageAt: messageListIndex beSelected: true. "autoSelectStrings is initialized right after this method, in autoSelectString:" ! Item was changed: ----- Method: MessageTrace>>messageListIndex: (in category 'actions') ----- messageListIndex: anInteger + "Set the index of the selected item to be anInteger. + Find the relevant auto select string to use, do my superclass' work and update the window title" + autoSelectStrings ifNotEmpty: [ autoSelectString := anInteger = 0 + ifTrue: [ "clear the autoSelectString" + String empty ] + ifFalse: [autoSelectStrings at: anInteger] + ]. + + anInteger > 0 ifTrue: [ self + messageAt: anInteger + beSelected: true + ]. + super messageListIndex: anInteger. + self changed: #windowTitle - ifTrue: - [ defaultSelectString ifNotNil: [:default| self containingWindow setLabel: default]. - "clear the autoSelectString" - '' ] - ifFalse: - [ messageListIndex := anInteger. - "setting the window label, below, can't wait for this.." - self containingWindow setLabel: (self windowLabelAt: anInteger). - "work out the string to ask the text view to pre-select. We should do better than this; after all the debugger does" - (autoSelectStrings at: anInteger)] ]. - anInteger > 0 ifTrue: - [ self - messageAt: anInteger - beSelected: true ]. - super messageListIndex: anInteger ! Item was changed: ----- Method: MessageTrace>>windowLabelAt: (in category 'private accessing') ----- windowLabelAt: anInteger + "return a suitable window label when there is an actual list item selected; work out what it should be based upon the array of autoSelectStrings or the current selection" + ^(autoSelectStrings at: anInteger) + ifNil: [ 'Implementors of ', - | str | - defaultSelectString ifNil: - [defaultSelectString := self containingWindow label]. - ^(str := autoSelectStrings at: anInteger) - ifNil: - [ 'Implementors of ', (self class parse: self selection + toClassAndSelector: [ :class :selector | selector ]) + ] + ifNotNil: [:str| 'Senders of ', str ] - toClassAndSelector: [ :class :selector | selector ]) ] - ifNotNil: - [ 'Senders of ', str ] ! Item was added: + ----- Method: MessageTrace>>windowTitle (in category 'building') ----- + windowTitle + "set the window label to suit the selection state; + if no selection, use saved widow label and add the number of items in the messageList + if something is selected, use the relevant string provided by windowLabelAt: which considers the index" + + ^messageListIndex = 0 + ifTrue:[String streamContents: [:str| str nextPutAll: windowLabel; + space; + nextPut: $[; + nextPutAll: messageList size asString; + nextPut: $] + ] + ] + ifFalse: [self windowLabelAt: messageListIndex]!

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