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"
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COPYRIGHT (c) 1989 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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Button subclass:#Toggle
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instanceVariableNames:'showLamp lampColor lampWidth lampHeight'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Interactors'
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!
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Toggle comment:'
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COPYRIGHT (c) 1989 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libwidg/Toggle.st,v 1.10 1995-01-26 16:05:02 claus Exp $
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'!
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!Toggle class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1989 by Claus Gittinger
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59
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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version
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"
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$Header: /cvs/stx/stx/libwidg/Toggle.st,v 1.10 1995-01-26 16:05:02 claus Exp $
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"
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!
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documentation
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"
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this button changes state whenever pressed and stays pressed until pressed
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again. All the main action is in Button, Toggle just redefines buttonpress/
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release behavior.
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The toggle may optionally display a little kind-of-lamp (or LED), which
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is turned on when the toggle is pressed. (i.e. as in the Interviews toolkit).
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whenever the Toggle changes its change, it will evaluate one of
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pressAction or releaseAction.
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For ST-80 compatibility, if the model is nonNil, this one gets a new
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value and is sent a changed message.
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If nonNil, the model is supposed to be a ValueHolder holding true or false.
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instance variables:
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showLamp <Boolean> true if a lamp should be displayed
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lampColor <Color> color of the lamp
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lampWidth <Integer> width of the lamp in pixel
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lampHeight <Integer> height of the lamp in pixel
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"
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!
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examples
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"
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Examples:
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Try these, to see what is possible.
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(notice, that these examples are meant to show what can be done;
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usually, all style-related stuff id preinitialized - you should not
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normally play around with onLevel, offLevel, showLamp: etc)
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simple:
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|v t|
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v := View new.
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t := Toggle label:'press here' in:v.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'toggle pressed'.].
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t releaseAction:[Transcript showCr:'toggle released'.].
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v realize
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changing logo:
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|v t|
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v := View new.
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t := Toggle label:'eat me' in:v.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'smaller'. t label:'drink me'].
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t releaseAction:[Transcript showCr:'larger'. t label:'eat me'].
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v realize
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changing logo and freezing size (looks better):
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|v t|
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v := View new.
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'create with large logo; freeze; change to small logo'.
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t := Toggle label:'drink me' in:v.
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t sizeFixed:true.
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t label:'eat me'.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'smaller'. t label:'drink me'].
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t releaseAction:[Transcript showCr:'larger'. t label:'eat me'].
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v realize
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adding lamp (on by default in some view styles):
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'. t label:'on'].
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t releaseAction:[Transcript showCr:'off'. t label:'off'].
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v realize
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lamp only - no 'going-in'
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t onLevel:(t offLevel).
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'. t label:'on'].
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t releaseAction:[Transcript showCr:'off'. t label:'off'].
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v realize
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lamp and freezing size of the label (looks better):
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t sizeFixed:true.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'. t label:'on'].
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t releaseAction:[Transcript showCr:'off'. t label:'off'].
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v realize
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another variation:
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t sizeFixed:true.
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t onLevel:(t offLevel).
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'. t label:'on'].
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t releaseAction:[Transcript showCr:'off'. t label:'off'].
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v realize
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and another one:
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t sizeFixed:true.
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t showLamp:false.
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t offLevel:3.
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t onLevel:3.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'. t showLamp:true. t label:'on'].
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t releaseAction:[Transcript showCr:'off'. t showLamp:false. t label:'off'].
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v realize
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another font:
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t font:(Font family:'times' face:'bold' style:'roman' size:24).
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t label:'hello'.
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'.].
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t releaseAction:[Transcript showCr:'off'.].
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v realize
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another font (no, I dont know what it means :-):
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|v t|
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v := View new.
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t := Toggle label:'off' in:v.
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t font:(Font family:'k14' face:nil style:nil size:nil).
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t label:(TwoByteString with:(Character value:16r3021)).
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t origin:10 @ 10.
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t pressAction:[Transcript showCr:'on'.].
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t releaseAction:[Transcript showCr:'off'.].
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v realize
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"
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! !
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!Toggle methodsFor:'initialization'!
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initialize
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super initialize.
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actionWhenPressed := true
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!
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initStyle
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super initStyle.
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showLamp := StyleSheet at:#toggleShowLamp default:false.
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showLamp ifTrue:[
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onLevel := offLevel.
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"dont know, if I like this ..."
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"
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activeBgColor := bgColor
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"
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].
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lampColor := StyleSheet at:#toggleLampColor default:Color yellow.
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lampWidth := (device horizontalPixelPerMillimeter * 1.8) rounded.
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lampHeight := (device verticalPixelPerMillimeter * 3.5) rounded.
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! !
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!Toggle methodsFor:'accessing'!
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showLamp
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"return true, if I show a lamp"
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^ showLamp
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!
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showLamp:aBoolean
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"enable/disable drawing of the lamp"
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showLamp ~~ aBoolean ifTrue:[
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showLamp := aBoolean.
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self computeLabelSize.
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fixSize ifFalse:[
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self resize
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]
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]
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!
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lampColor:aColor
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"change the color of the toggle-lamp"
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lampColor := aColor.
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(shown and:[showLamp and:[pressed]]) ifTrue:[
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self redraw
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]
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! !
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!Toggle methodsFor:'private'!
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computeLabelOrigin
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"compute the origin of the form/text.
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redefined to move label to the right if there is a lamp."
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super computeLabelOrigin.
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showLamp ifTrue:[
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labelOriginX := labelOriginX + hSpace + lampWidth + hSpace.
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]
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!
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computeLabelSize
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"compute the extent needed to hold the label plus the lamp"
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super computeLabelSize.
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showLamp ifTrue:[
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labelWidth := labelWidth + hSpace + lampWidth + hSpace.
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labelHeight := labelHeight max: lampHeight
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]
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! !
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!Toggle methodsFor:'changing state'!
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toggleNoAction
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"toggle, but do NOT perform any action - can be used to change a toggle
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under program control (i.e. turn one toggle off from another one)"
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|newLevel|
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pressed := pressed not.
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pressed ifTrue:[
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newLevel := onLevel.
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] ifFalse:[
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newLevel := offLevel.
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].
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self level:newLevel.
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shown ifTrue:[
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self redraw
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].
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model notNil ifTrue:[
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model value:pressed
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]
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!
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toggle
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"toggle and perform the action"
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|action|
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enabled ifTrue:[
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self toggleNoAction.
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pressed ifTrue:[
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action := pressActionBlock
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] ifFalse:[
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action := releaseActionBlock
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].
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action notNil ifTrue:[action value].
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model notNil ifTrue:[
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model value:pressed.
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model changed
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].
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self changed
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]
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338 |
! !
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339 |
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!Toggle methodsFor:'event handling'!
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0
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341 |
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buttonPress:button x:x y:y
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((button == 1) or:[button == #select]) ifTrue:[
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self toggle
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] ifFalse:[
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^ super buttonPress:button x:x y:y
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347 |
].
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348 |
!
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349 |
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buttonRelease:button x:x y:y
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((button == 1) or:[button == #select]) ifFalse:[
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^ super buttonRelease:button x:x y:y
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].
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"ignore"
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! !
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22
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356 |
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357 |
!Toggle methodsFor:'redrawing'!
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drawWith:fg and:bg
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"redraw myself with fg/bg. Use super to draw the label,
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361 |
drawing of the lamp is done here."
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22
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362 |
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363 |
|x y|
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364 |
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365 |
super drawWith:fg and:bg. "this draws the text"
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366 |
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367 |
showLamp ifTrue:[
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59
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368 |
x := hSpace + margin.
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369 |
y := (height - lampHeight) // 2.
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370 |
self drawEdgesForX:x y:y width:lampWidth height:lampHeight level:-1.
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371 |
pressed ifTrue:[
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372 |
self paint:lampColor.
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373 |
] ifFalse:[
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374 |
self paint:bgColor.
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375 |
].
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376 |
self fillRectangleX:x+2 y:y+2 width:lampWidth - 4 height:lampHeight - 4
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22
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377 |
]
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|
378 |
! !
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