Nicolas Cellier uploaded a new version of Morphic to project The Trunk: http://source.squeak.org/trunk/Morphic-tpr.1057.mcz
==================== Summary ====================
Name: Morphic-tpr.1057 Author: tpr Time: 7 December 2015, 8:24:53.359 pm UUID: c685257b-5ee7-49b3-a6b7-5255f28cd47f Ancestors: Morphic-dtl.1056
Add the STWCPW version of cursor gridding to HandMorph. It may very well be better to add two instance variables rather than use a couple of properties to hold the state. There may well be other methods needing changes. To use: start by sending gridTo: grid origin: origin to the hand any subsequent temporaryCursor... will be forced to screeen co-ordinates that are on grid sized steps with an offset of the origin. gridPointRaw provides the frid limited position of the current hand. Older events are *not* gridded - this is one of the places where there may be more to do.
=============== Diff against Morphic-dtl.1056 ===============
Item was added: + ----- Method: HandMorph>>gridPointRaw (in category 'gridded cursor') ----- + gridPointRaw + "return my latest position gridded" + ^self griddedPoint: self currentEvent position!
Item was added: + ----- Method: HandMorph>>gridTo:origin: (in category 'gridded cursor') ----- + gridTo: grid origin: offset + "set a couple of properties to specify gridding for the temporaryCursor; instvars would be nicer" + self setProperty: #gridStep toValue: grid; + setProperty: #gridOffset toValue: offset!
Item was added: + ----- Method: HandMorph>>griddedPoint: (in category 'gridded cursor') ----- + griddedPoint: aPoint + "return the equivalent point snapped to the grid, if indeed any gridding is set" + self valueOfProperty: #gridStep ifPresentDo: [:grid| |offset| + offset := self valueOfProperty: #gridOffset ifAbsent: [0@0]. + ^ offset + (aPoint + (grid //2) - offset truncateTo: grid)]. + ^aPoint!
Item was changed: ----- Method: HandMorph>>position: (in category 'geometry') ----- position: aPoint "Overridden to align submorph origins to the grid if gridding is on." | adjustedPosition delta box | adjustedPosition := aPoint. + temporaryCursor ifNotNil: [adjustedPosition := (self griddedPoint: adjustedPosition) + temporaryCursorOffset]. - temporaryCursor ifNotNil: [adjustedPosition := adjustedPosition + temporaryCursorOffset].
"Copied from Morph to avoid owner layoutChanged" "Change the position of this morph and and all of its submorphs." delta := adjustedPosition - bounds topLeft. delta isZero ifTrue: [^ self]. "Null change" box := self fullBounds. (delta dotProduct: delta) > 100 ifTrue:[ "e.g., more than 10 pixels moved" self invalidRect: box. self invalidRect: (box translateBy: delta). ] ifFalse:[ self invalidRect: (box merge: (box translateBy: delta)). ]. self privateFullMoveBy: delta. !
Item was added: + ----- Method: HandMorph>>turnOffGridding (in category 'gridded cursor') ----- + turnOffGridding + "remove the gridding properties to stop gridding" + self removeProperty: #gridStep; removeProperty: #gridOffset!