LearnMorphic.st
Last updated at 3:20 pm UTC on 30 June 2018
"Classes used in the active essay Programming Morphs
Flasher is used as well but that is in the image.
"
Morph subclass: #FollowerMorph
instanceVariableNames: 'morphToFollow '
classVariableNames: ''
poolDictionaries: ''
category: 'LearnMorphic'!
!FollowerMorph commentStamp: '<historical>' prior: 0!
A morph that follows around another morph. Or at least, it should -- can you fix it?
!
!FollowerMorph methodsFor: 'initialization' stamp: 'ls 6/12/2001 01:50'!
morphToFollow: aMorph
"set which morph this morph should follow around the screen"
morphToFollow := aMorph! !
Morph subclass: #KeyControlledMorph
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'LearnMorphic'!
!KeyControlledMorph commentStamp: '<historical>' prior: 0!
A morph that moves around according to key presses. Or at least it should. Can you fix it?!
Morph subclass: #LetterShowingMorph
instanceVariableNames: 'theLetter '
classVariableNames: ''
poolDictionaries: ''
category: 'LearnMorphic'!
!LetterShowingMorph commentStamp: '<historical>' prior: 0!
A morph that displays the last character typed by the user while pointing at the morph.!
!LetterShowingMorph methodsFor: 'initialization' stamp: 'ls 6/12/2001 01:29'!
initialize
super initialize.
theLetter := $A.! !
!LetterShowingMorph methodsFor: 'drawing' stamp: 'ls 6/12/2001 01:31'!
drawOn: aCanvas
aCanvas frameRectangle: self bounds width: 1 color: self color.
aCanvas
text: theLetter asString
bounds: (self topLeft + (10@10) corner: self bottomRight)
font: nil
color: self color.! !
!LetterShowingMorph methodsFor: 'the letter' stamp: 'ls 6/12/2001 01:32'!
newLetter: aCharacter
"change the letter that is being displayed"
theLetter := aCharacter.
self changed.! !
!LetterShowingMorph methodsFor: 'event handling' stamp: 'ls 6/12/2001 01:38'!
handleKeystroke: evt
self newLetter: evt keyCharacter! !
!LetterShowingMorph methodsFor: 'event handling' stamp: 'ls 6/12/2001 01:40'!
handlesMouseOver: evt
^true! !
!LetterShowingMorph methodsFor: 'event handling' stamp: 'ls 6/12/2001 01:40'!
mouseEnter: evt
"grab keyboard events"
evt hand newKeyboardFocus: self.
! !
!LetterShowingMorph methodsFor: 'event handling' stamp: 'ls 6/12/2001 01:34'!
mouseLeave: evt
"ignore keyboard events"
evt hand newKeyboardFocus: nil.! !
Morph subclass: #ToggleMorph
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'LearnMorphic'!
!ToggleMorph commentStamp: '<historical>' prior: 0!
A morph that switches between white and black when it is clicked with the yellow button. Well, at least, it *should* swtich back and forth, but it doesn't yet. Can you finish this class?!
