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"
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COPYRIGHT (c) 1994 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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'From Smalltalk/X, Version:2.10.3 on 27-sep-1994 at 12:56:30'!
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ScrollBar subclass:#SteppingSlider
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instanceVariableNames:'stepIncrement'
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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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SteppingSlider comment:'
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COPYRIGHT (c) 1994 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libwidg2/SteppingSlider.st,v 1.4 1995-07-23 03:12:59 claus Exp $
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'!
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!SteppingSlider class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1994 by Claus Gittinger
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49
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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/libwidg2/SteppingSlider.st,v 1.4 1995-07-23 03:12:59 claus Exp $
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"
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!
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documentation
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"
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SteppingSliders are like Sliders, but add step-up and step-down
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buttons (which increment/decrement the value).
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(you can also think of them as a ScrollBar with a slider instead of
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a scroller as component)
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"
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!
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examples
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"
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non model operation:
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|top sl|
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top := StandardSystemView extent:200@200.
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sl := SteppingSlider in:top.
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sl origin:(0.0@0.0) corner:(sl width@1.0).
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sl scrollAction:[:pos | Transcript showCr:pos].
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top open
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change the step:
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|top sl|
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top := StandardSystemView extent:200@200.
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sl := SteppingSlider in:top.
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sl origin:(0.0@0.0) corner:(sl width@1.0).
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sl scrollAction:[:pos | Transcript showCr:pos].
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sl stepIncrement:10.
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top open
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model operation (look at value in model):
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|model top sl fld|
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model := 0 asValue.
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top := StandardSystemView extent:200@200.
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top label:'slider on model'.
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sl := SteppingSlider in:top.
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sl origin:(0.0@0.0) corner:(sl width@1.0).
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sl model:model.
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top open.
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top := StandardSystemView extent:200@200.
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top label:'inputField on model'.
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fld := EditField in:top.
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fld origin:(0.0@0.0) corner:(1.0 @ fld height).
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fld model:model; converter:(PrintConverter new initForNumber).
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top open
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"
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! !
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!SteppingSlider methodsFor:'initialization'!
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createElements
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button1 := ArrowButton upIn:self.
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button1 name:'UpButton'.
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button2 := ArrowButton downIn:self.
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button2 name:'DownButton'.
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thumb := Slider in:self.
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!
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initialize
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super initialize.
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stepIncrement := 1.
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self scrollDownAction:[self scrollStepUp].
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self scrollUpAction:[self scrollStepDown].
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! !
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!SteppingSlider methodsFor:'accessing'!
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model:aModel
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thumb model:aModel
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!
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stepIncrement:aNumber
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"set the value used for stepping (defaults to 1)"
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stepIncrement := aNumber
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!
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step:aNumber
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"same as stepIncrement;
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set the value used for stepping (defaults to 1)"
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stepIncrement := aNumber
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!
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step
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^ stepIncrement
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!
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start:start stop:stop step:step
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thumb start:start stop:stop.
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stepIncrement := step
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! !
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!SteppingSlider methodsFor:'events'!
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keyPress:key x:x y:y
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key == #CursorRight ifTrue:[
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self scrollStepUp.
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^ self
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].
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key == #CursorLeft ifTrue:[
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self scrollStepDown.
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^ self
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].
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super keyPress:key x:x y:y
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! !
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!SteppingSlider methodsFor:'private'!
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scrollStepUp
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|nO|
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nO := (thumb thumbOrigin + stepIncrement) min:thumb stop.
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thumb thumbOrigin:nO.
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thumb tellOthers.
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!
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scrollStepDown
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|nO|
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nO := (thumb thumbOrigin - stepIncrement) max:thumb start.
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thumb thumbOrigin:nO.
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thumb tellOthers.
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! !
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!SteppingSlider methodsFor:'misc'!
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doesNotUnderstand:aMessage
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^ aMessage sendTo:thumb
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! !
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