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"
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COPYRIGHT (c) 1991 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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SimpleView subclass:#Ruler
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instanceVariableNames:'fgColor metric paperWidth paperHeight scale showUnit'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Misc'
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!
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!Ruler class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1991 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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!
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documentation
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"
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117
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a shows some unit scale; See example use in DrawTool.
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instance variables:
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fgColor <Color> color to draw text and marks with
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metric <Symbol> inch or mm
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paperWidth <Number> width of paper
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paperHeight <Number> height of paper
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scale <Number> scale factor for zoom
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showUnit <Boolean> if true, a unit string is displayed
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"
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!
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examples
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"
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161
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[exBegin]
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|top ruler|
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top := StandardSystemView new.
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ruler := Ruler origin:0.0@0.0 corner:1.0@30 in:top.
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top open
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[exEnd]
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defining paperWidth:
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[exBegin]
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|top ruler|
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top := StandardSystemView new.
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ruler := Ruler origin:0.0@0.0 corner:1.0@30 in:top.
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ruler paperWidthInch:5.
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top open
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[exEnd]
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hide unit string:
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[exBegin]
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|top ruler|
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top := StandardSystemView new.
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ruler := Ruler origin:0.0@0.0 corner:1.0@30 in:top.
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ruler showUnit:false.
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top open
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[exEnd]
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both horizontal and vertical rulers (as in DrawTool):
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[exBegin]
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|top hRuler vRuler|
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0
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top := StandardSystemView new.
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hRuler := Ruler origin:30@0.0 corner:1.0@30 in:top.
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vRuler := VerticalRuler origin:0.0@30 corner:30@1.0 in:top.
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vRuler showUnit:false.
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top open
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[exEnd]
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with some 3D effects:
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[exBegin]
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|top hRuler vRuler|
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top := StandardSystemView new.
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hRuler := Ruler origin:30@0.0 corner:1.0@30 in:top.
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vRuler := VerticalRuler origin:0.0@30 corner:30@1.0 in:top.
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vRuler showUnit:false.
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hRuler level:1.
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vRuler level:1.
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top open
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[exEnd]
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see the DrawTool, for how to make it scroll in sync with some
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other view.
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"
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! !
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!Ruler methodsFor:'accessing'!
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heightOfContents
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^ (device verticalPixelPerInch * paperHeight) rounded
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!
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metric:aSymbol
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"set the metric. The argument may be either #inch or #mm"
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aSymbol ~~ metric ifTrue:[
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metric := aSymbol.
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shown ifTrue:[
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self redraw
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]
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]
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!
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paperWidthInch:inches
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"set the width of the document"
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paperWidth := inches.
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shown ifTrue:[
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self redraw
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]
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!
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paperWidthMM:millis
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"set the width of the document"
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paperWidth := self millimeterToInch:millis.
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shown ifTrue:[
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self redraw
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]
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!
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scale:aFactor
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"set the scale factor. 1 is identity."
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aFactor ~= scale ifTrue:[
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scale := aFactor.
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shown ifTrue:[
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self redraw
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]
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]
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!
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showUnit:aBoolean
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"set/clear the showUnit flag. If false, the unit string
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(i.e. 'inch' or 'mm') is not schown. Default is true."
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showUnit := aBoolean.
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!
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viewOrigin:origin
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origin = self viewOrigin ifTrue:[^ self].
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super setViewOrigin:origin.
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self redraw
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!
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widthOfContents
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^ (device horizontalPixelPerInch * paperWidth) rounded
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! !
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!Ruler methodsFor:'initialization'!
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initialize
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super initialize.
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viewBackground := styleSheet colorAt:#rulerBackgroundColor default:viewBackground.
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fgColor := styleSheet colorAt:#rulerForegroundColor.
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fgColor isNil ifTrue:[
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fgColor := styleSheet colorAt:#foregroundColor.
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].
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fgColor isNil ifTrue:[
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viewBackground brightness > 0.5 ifTrue:[
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fgColor := Black.
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] ifFalse:[
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fgColor := White
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].
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].
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fgColor := fgColor on:device.
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196 |
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bitGravity := #NorthWest.
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self height:(font height + (2 * font descent)).
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200 |
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(Smalltalk language == #english) ifTrue:[
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metric := #inch
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] ifFalse:[
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metric := #mm
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].
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metric := styleSheet at:#rulerMetric default:metric.
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207 |
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showUnit := true.
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scale := 1.
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paperWidth := 8.5.
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paperHeight := 11.
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"
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take a smaller font
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"
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font := (Font family:(font family)
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face:(font face)
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style:(font style)
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size:8) on:device.
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"
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Ruler new open
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"
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!
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reinitialize
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super reinitialize.
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font := font on:device.
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! !
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!Ruler methodsFor:'metric conversions'!
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234 |
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inchToMillimeter:inches
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"convert inches to mm"
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^ inches * 25.4
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!
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inchToPixel:inches
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"convert inches to screen pixels"
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^ inches * self horizontalPixelPerInch
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!
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inchToTwip:inches
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"convert inches to twips"
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^ inches * 1440
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!
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millimeterToInch:mm
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"convert mm to inches"
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^ mm / 25.4
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!
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millimeterToPixel:mm
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"convert mms to screen pixels"
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^ mm * self horizontalPixelPerMillimeter
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!
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pixelToInch:pixels
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"convert pixels to inches"
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^ pixels / self horizontalPixelPerInch
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!
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pointToTwip:points
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"convert points to twips"
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^ points * 20
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!
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278 |
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twipToInch:twips
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"convert twips to inches"
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^ twips / 1440.0
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!
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284 |
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twipToPixel:twips
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"convert twips to screen pixels"
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^ (twips / 1440.0) * self horizontalPixelPerInch
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289 |
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!
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twipToPoint:twips
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"convert twips to points"
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^ twips / 20.0
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0
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! !
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297 |
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298 |
!Ruler methodsFor:'redrawing'!
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redraw
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"redraw the scale"
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|x pixelPerMM pixelPerInch mod pos shortLen veryShortLen longLen charY
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top paperWidthMM paperWidthPixel xOrigin labelRight stringRight marg|
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0
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305 |
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shown ifFalse:[^ self].
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self clear.
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xOrigin := self viewOrigin x.
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311 |
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paperWidthPixel := ((self inchToPixel:paperWidth) * scale) rounded.
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313 |
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6
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(xOrigin + width > paperWidthPixel) ifTrue:[
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315 |
self paint:(Color darkGrey).
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316 |
self fillRectangleX:paperWidthPixel y:0
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width:(xOrigin + width - paperWidthPixel)
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height:height.
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319 |
self paint:fgColor.
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320 |
self displayLineFromX:paperWidthPixel y:0
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321 |
toX:paperWidthPixel y:height
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0
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322 |
].
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323 |
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self paint:fgColor.
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325 |
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top := height - font height - font ascent.
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327 |
longLen := font height.
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|
328 |
shortLen := longLen // 2.
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|
329 |
charY := top + (font ascent) + shortLen.
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|
330 |
mod := 1.
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6
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331 |
marg := 3. "character shift"
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0
|
332 |
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333 |
(metric == #mm) ifTrue:[
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24
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334 |
"centimeter - long blibs every centimeter; short ones every half"
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0
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335 |
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24
|
336 |
paperWidthMM := self inchToMillimeter:paperWidth.
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26
|
337 |
pixelPerMM := (self millimeterToPixel:1) * scale.
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24
|
338 |
pos := 5.
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33
|
339 |
showUnit ifTrue:[
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34
|
340 |
labelRight := stringRight := marg + (font widthOf:'cm') + 3 + xOrigin.
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33
|
341 |
] ifFalse:[
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34
|
342 |
labelRight := stringRight := xOrigin.
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33
|
343 |
].
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6
|
344 |
|
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34
|
345 |
x := (pixelPerMM * pos) rounded.
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|
346 |
[(x < (width+xOrigin)) and:[pos <= paperWidthMM]] whileTrue:[
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26
|
347 |
|l|
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|
348 |
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28
|
349 |
l := shortLen.
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|
350 |
(mod ~~ 1) ifTrue:[
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|
351 |
x < stringRight ifFalse:[
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26
|
352 |
l := longLen
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353 |
].
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28
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354 |
].
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|
355 |
self displayLineFromX:x y:top
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|
356 |
toX:x y:(top + l).
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26
|
357 |
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28
|
358 |
((x < stringRight) or:[mod == 1]) ifFalse:[
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|
359 |
self displayString:(pos // 10) printString
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|
360 |
x:(x + marg)
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|
361 |
y:charY.
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|
362 |
stringRight := x + marg
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|
363 |
+ (font widthOf:(pos // 10) printString)
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24
|
364 |
].
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|
365 |
mod := (mod + 1) \\ 2.
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|
366 |
pos := pos + 5.
|
|
34
|
367 |
x := (pixelPerMM * pos) rounded
|
|
24
|
368 |
].
|
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34
|
369 |
self displayString:'cm ' x:marg+xOrigin y:charY.
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|
0
|
370 |
].
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|
371 |
(metric == #inch) ifTrue:[
|
|
24
|
372 |
"inches - long blibs every inch; short ones every half; very
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|
373 |
short ones every quarter"
|
|
0
|
374 |
|
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26
|
375 |
pixelPerInch := (self inchToPixel:1) * scale.
|
|
24
|
376 |
pos := 0.25.
|
|
33
|
377 |
showUnit ifTrue:[
|
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34
|
378 |
labelRight := marg + (font widthOf:'inch') + 3 + xOrigin.
|
|
33
|
379 |
] ifFalse:[
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34
|
380 |
labelRight := xOrigin
|
|
33
|
381 |
].
|
|
6
|
382 |
|
|
34
|
383 |
x := (pixelPerInch * pos) rounded.
|
|
24
|
384 |
veryShortLen := longLen // 4.
|
|
34
|
385 |
[(x < (xOrigin+width)) and:[pos <= paperWidth]] whileTrue:[
|
|
28
|
386 |
|l|
|
|
|
387 |
|
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|
388 |
l := shortLen.
|
|
24
|
389 |
(mod == 0) ifTrue:[
|
|
|
390 |
x < labelRight ifFalse:[
|
|
28
|
391 |
l := longLen
|
|
24
|
392 |
]
|
|
|
393 |
] ifFalse:[
|
|
28
|
394 |
(mod == 2) ifFalse:[
|
|
|
395 |
l := veryShortLen
|
|
24
|
396 |
]
|
|
|
397 |
].
|
|
28
|
398 |
self displayLineFromX:x y:top
|
|
|
399 |
toX:x y:(top + l).
|
|
|
400 |
|
|
|
401 |
(mod == 0 and:[x >= labelRight]) ifTrue:[
|
|
|
402 |
self displayString:pos asInteger printString
|
|
|
403 |
x:(x + marg)
|
|
|
404 |
y:charY
|
|
|
405 |
].
|
|
24
|
406 |
mod := (mod + 1) \\ 4.
|
|
|
407 |
pos := pos + 0.25.
|
|
34
|
408 |
x := (pixelPerInch * pos) rounded
|
|
24
|
409 |
].
|
|
34
|
410 |
self displayString:'inch ' x:marg+xOrigin y:charY.
|
|
0
|
411 |
].
|
|
|
412 |
self redrawEdges
|
|
|
413 |
! !
|
|
|
414 |
|
|
99
|
415 |
!Ruler class methodsFor:'documentation'!
|
|
|
416 |
|
|
|
417 |
version
|
|
161
|
418 |
^ '$Header: /cvs/stx/stx/libwidg2/Ruler.st,v 1.22 1996-04-27 18:22:09 cg Exp $'
|
|
99
|
419 |
! !
|