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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:'DefaultShowLamp DefaultLampColor'
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poolDictionaries:''
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category:'Views-Interactors'
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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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documentation
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"
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this button changes state whenever clicked upon and stays down (pressed)
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until clicked again. All the main action is in Button and the controller
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(ToggleController).
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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. Also, the toggle will follow changes
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in the model and update its display as appropriate.
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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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styleSheet values:
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toggleShowLamp <Boolean> if true, a lamp is shown; default:false.
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toggleLampColor <Color> lamps color; default:yellow.
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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 all, 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 is 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 := StandardSystemView new extent:200@200.
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t := Toggle label:'press here' in:v.
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t origin:10 @ 10.
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t action:[:value | Transcript show:'toggle state: '; showCr:value.].
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v open
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separate press/release actions:
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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changing logo:
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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uhh - changing logos and getting bg-colors from the image:
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|v t i|
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v := StandardSystemView new extent:200@200.
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t := Toggle in:v.
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t origin:10 @ 10.
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t showLamp:false.
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t activeLogo:(i := Image fromFile:'red-ball.gif').
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t passiveLogo:(Image fromFile:'green-ball.gif').
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t backgroundColor:(i at:0@0).
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t enteredBackgroundColor:(t backgroundColor).
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t activeBackgroundColor:(t backgroundColor).
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v open
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changing logo and freezing size (looks better):
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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adding a lamp (in some view styles, this is the default anyway):
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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changing lamps color:
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|v t|
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v := StandardSystemView new extent:200@200.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t lampColor:Color red.
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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 open
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changing lamps color & size:
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|v t|
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v := StandardSystemView new extent:200@200.
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t := Toggle label:'off' in:v.
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t showLamp:true.
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t lampColor:Color red.
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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 open
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lamp only - no '3D going-in' (this is the default with IRIS style)
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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lamp and freezing size of the label (looks better):
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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another variation:
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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and another one:
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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another font:
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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another font (no, I dont know what it means :-):
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|v t|
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v := StandardSystemView new extent:200@200.
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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 open
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using a model (look at 'value' in the inspector):
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|m v t|
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m := ValueHolder newBoolean.
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m inspect.
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v := StandardSystemView new extent:200@200.
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t := Toggle label:'press here to change value' in:v.
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t origin:10 @ 10.
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t model:m.
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v open
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using a model with different changeSelector:
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|m v t|
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m := Plug new.
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m respondTo:#setValue1: with:[:value | Transcript show:'value 1 changed to: '; showCr:value].
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m respondTo:#setValue2: with:[:value | Transcript show:'value 2 changed to: '; showCr:value].
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v := StandardSystemView new extent:200@200.
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t := Toggle label:'press here for value1' in:v.
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t origin:10 @ 10.
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t model:m; change:#setValue1:.
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t := Toggle label:'press here for value2' in:v.
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t origin:10 @ 50.
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t model:m; change:#setValue2:.
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v open
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two toggles on the same model:
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|m v t|
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m := true asValue.
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v := StandardSystemView new extent:200@200.
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t := Toggle label:'press here' in:v.
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t origin:10 @ 10.
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t model:m.
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t := Toggle label:'or here' in:v.
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t origin:10 @ 50.
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t model:m.
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v open
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"
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322 |
! !
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323 |
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119
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324 |
!Toggle class methodsFor:'defaults'!
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325 |
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326 |
updateStyleCache
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327 |
DefaultShowLamp := StyleSheet at:'toggleShowLamp' default:false.
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328 |
DefaultLampColor := StyleSheet colorAt:'toggleLampColor' default:Color yellow.
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329 |
! !
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330 |
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205
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!Toggle methodsFor:'accessing'!
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332 |
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lampColor:aColor
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"change the color of the toggle-lamp"
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335 |
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lampColor := aColor.
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(shown and:[showLamp and:[controller pressed]]) ifTrue:[
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self redraw
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]
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!
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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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346 |
!
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347 |
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348 |
showLamp:aBoolean
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349 |
"enable/disable drawing of the lamp"
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350 |
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showLamp ~~ aBoolean ifTrue:[
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showLamp := aBoolean.
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353 |
self computeLabelSize.
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fixSize ifFalse:[
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355 |
self resize
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356 |
]
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357 |
]
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358 |
! !
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359 |
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360 |
!Toggle methodsFor:'change & update'!
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361 |
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362 |
update:something with:parameter from:changedObject
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363 |
something == aspectMsg ifTrue:[
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364 |
self getValueFromModel.
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365 |
^ self
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366 |
].
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367 |
super update:something with:parameter from:changedObject
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368 |
! !
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369 |
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22
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370 |
!Toggle methodsFor:'initialization'!
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371 |
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105
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372 |
defaultControllerClass
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373 |
^ ToggleController
|
|
|
374 |
!
|
|
|
375 |
|
|
22
|
376 |
initStyle
|
|
|
377 |
super initStyle.
|
|
|
378 |
|
|
119
|
379 |
showLamp := DefaultShowLamp.
|
|
22
|
380 |
showLamp ifTrue:[
|
|
59
|
381 |
onLevel := offLevel.
|
|
22
|
382 |
|
|
59
|
383 |
"dont know, if I like this ..."
|
|
|
384 |
"
|
|
|
385 |
activeBgColor := bgColor
|
|
|
386 |
"
|
|
22
|
387 |
].
|
|
38
|
388 |
|
|
119
|
389 |
lampColor := DefaultLampColor on:device.
|
|
38
|
390 |
lampWidth := (device horizontalPixelPerMillimeter * 1.8) rounded.
|
|
|
391 |
lampHeight := (device verticalPixelPerMillimeter * 3.5) rounded.
|
|
119
|
392 |
!
|
|
|
393 |
|
|
|
394 |
realize
|
|
|
395 |
"/
|
|
|
396 |
"/ get my initial state from the model (if there is one)
|
|
|
397 |
"/
|
|
|
398 |
self getValueFromModel.
|
|
|
399 |
super realize
|
|
22
|
400 |
! !
|
|
|
401 |
|
|
|
402 |
!Toggle methodsFor:'private'!
|
|
|
403 |
|
|
|
404 |
computeLabelOrigin
|
|
|
405 |
"compute the origin of the form/text.
|
|
|
406 |
redefined to move label to the right if there is a lamp."
|
|
|
407 |
|
|
|
408 |
super computeLabelOrigin.
|
|
|
409 |
showLamp ifTrue:[
|
|
59
|
410 |
labelOriginX := labelOriginX + hSpace + lampWidth + hSpace.
|
|
22
|
411 |
]
|
|
|
412 |
!
|
|
|
413 |
|
|
|
414 |
computeLabelSize
|
|
|
415 |
"compute the extent needed to hold the label plus the lamp"
|
|
|
416 |
|
|
|
417 |
super computeLabelSize.
|
|
|
418 |
showLamp ifTrue:[
|
|
59
|
419 |
labelWidth := labelWidth + hSpace + lampWidth + hSpace.
|
|
|
420 |
labelHeight := labelHeight max: lampHeight
|
|
22
|
421 |
]
|
|
205
|
422 |
!
|
|
0
|
423 |
|
|
205
|
424 |
getValueFromModel
|
|
|
425 |
|val|
|
|
121
|
426 |
|
|
205
|
427 |
(model notNil and:[aspectMsg notNil]) ifTrue:[
|
|
|
428 |
aspectMsg numArgs == 0 ifTrue:[
|
|
|
429 |
val := model perform:aspectMsg
|
|
|
430 |
] ifFalse:[
|
|
|
431 |
val := model perform:aspectMsg with:self
|
|
|
432 |
].
|
|
|
433 |
val ifTrue:[
|
|
|
434 |
self turnOn
|
|
|
435 |
] ifFalse:[
|
|
|
436 |
self turnOff
|
|
|
437 |
].
|
|
121
|
438 |
].
|
|
205
|
439 |
|
|
|
440 |
"Created: 14.11.1995 / 21:08:43 / cg"
|
|
121
|
441 |
! !
|
|
|
442 |
|
|
105
|
443 |
!Toggle methodsFor:'redrawing'!
|
|
|
444 |
|
|
|
445 |
drawWith:fg and:bg
|
|
|
446 |
"redraw myself with fg/bg. Use super to draw the label,
|
|
|
447 |
drawing of the lamp is done here."
|
|
|
448 |
|
|
|
449 |
|x y clr|
|
|
|
450 |
|
|
|
451 |
super drawWith:fg and:bg. "this draws the text"
|
|
|
452 |
|
|
|
453 |
showLamp ifTrue:[
|
|
|
454 |
x := hSpace + margin.
|
|
|
455 |
y := (height - lampHeight) // 2.
|
|
|
456 |
self drawEdgesForX:x y:y width:lampWidth height:lampHeight level:-1.
|
|
|
457 |
controller pressed ifTrue:[
|
|
|
458 |
clr := lampColor.
|
|
|
459 |
] ifFalse:[
|
|
|
460 |
clr := bgColor.
|
|
|
461 |
].
|
|
|
462 |
self paint:clr.
|
|
|
463 |
self fillRectangleX:x+2 y:y+2 width:lampWidth - 4 height:lampHeight - 4
|
|
|
464 |
]
|
|
|
465 |
! !
|
|
205
|
466 |
|
|
|
467 |
!Toggle class methodsFor:'documentation'!
|
|
|
468 |
|
|
|
469 |
version
|
|
377
|
470 |
^ '$Header: /cvs/stx/stx/libwidg/Toggle.st,v 1.24 1996-02-22 17:58:59 ca Exp $'
|
|
205
|
471 |
! !
|