Hi,
for etoy users, the easiest way to make objects unscalable is to go to geometry category and make a script with the tiles length an the tile width and set this script ticking.
Asking how to get two raw of the same length using always the same animal in a raw, will help discovering GCD:
Regards
-------- Message d'origine-------- De: squeakland-bounces@squeakland.org de la part de Hilaire Fernandes Date: mar. 22/04/2008 17:30 À: karl Cc: squeakland.org mailing list; etoys Objet : [Squeakland] Re: Unscalable picture Re: [Etoys] Squeak activityabout Measure
2008/4/22, karl karl.ramberg@comhem.se:
Inspect the SketchMorph and do it: ImageMorph new image: originalForm;openInWorld
Or file in this change set that adds a menu item that toggles SketchMorphs scalability.
The one from your .cs is even greater so that kids can still redraw on the sticker to construct sub-unit (as shown in my .pr file).
Although this example is simple like stupid, it really shows the pedagogical effectiveness of Squeak. Indeed all the step necessary to prepare the .pr file (importing the sticker from a scan, cutting the sticker, preparing a stickers distributor, writing the text, saving the projet, distributing it to the learner) is in the scope of a teacher even with low ICT experience.
And at the end, it is still a nice activity going into knowledge construction.
I will propose later some more with a mix of DrGeo and usual squeak manipulation (some as bad example and other as good example)
Hilaire
Karl
Hilaire
2008/4/22, karl karl.ramberg@comhem.se:
Hilaire Fernandes wrote:
A simple pedagogical activity about measure for primary school
students.
http://swiki.ofset.org:8000/super/337 You need to install Squeakland: http://www.squeakland.org/
Eventually I would like to be able to lock the resize of the sticker.
Hilaire
My French is really horrible but I recognize animal names :-) If you use ImageMorphs they will not resize.
Karl
'From etoys3.0 of 24 February 2008 [latest update: #1985] on 22 April 2008 at 4:47:36 pm'! "Change Set: UnscalableSketch Date: 22 April 2008 Author: Karl Ramberg
Adds a menu item to toggle scalability if a picture"!
Morph subclass: #SketchMorph instanceVariableNames: 'originalForm rotationStyle scalePoint framesToDwell rotatedForm unscalable ' classVariableNames: '' poolDictionaries: '' category: 'Morphic-Basic'!
!SketchMorph methodsFor: 'geometry' stamp: '<no author> 4/22/2008 16:21'! extent: newExtent "Change my scale to fit myself into the given extent. Avoid extents where X or Y is zero." unscalable ifNotNil:[ unscalable ifTrue:[^self]]. (newExtent y = 0 or: [ newExtent x = 0 ]) ifTrue: [ ^self ]. self extent = newExtent ifTrue:[^self]. scalePoint _ newExtent asFloatPoint / (originalForm extent max: 1@1). self layoutChanged. ! !
!SketchMorph methodsFor: 'menu' stamp: 'kfr 4/22/2008 16:36'! toggleUnscalable ^self unscalable: (self unscalable not)! !
!SketchMorph methodsFor: 'menu' stamp: 'kfr 4/22/2008 16:30'! unscalable unscalable ifNil:[unscalable _ false]. ^unscalable! !
!SketchMorph methodsFor: 'menu' stamp: 'kfr 4/22/2008 16:42'! unscalableString ^ (self unscalable ifTrue: ['<yes>'] ifFalse: ['<no>']) , 'unscalable image' translated! !
!SketchMorph methodsFor: 'menu' stamp: 'kfr 4/22/2008 16:29'! unscalable: aBoolean unscalable _ aBoolean! !
!SketchMorph methodsFor: 'menus' stamp: 'kfr 4/22/2008 16:43'! addToggleItemsToHaloMenu: aCustomMenu "Add toggle-items to the halo menu"
super addToggleItemsToHaloMenu: aCustomMenu. aCustomMenu addUpdating: #unscalableString target: self action:#toggleUnscalable. (Smalltalk includesKey: #B3DRenderEngine) ifTrue: [ aCustomMenu addUpdating: #useInterpolationString target: self action: #toggleInterpolation. ]. ! !
SketchMorph removeSelector: #unscaleable! Morph subclass: #SketchMorph instanceVariableNames: 'originalForm rotationStyle scalePoint framesToDwell rotatedForm unscalable' classVariableNames: '' poolDictionaries: '' category: 'Morphic-Basic'!