VerticalRuler.st
author claus
Wed, 21 Dec 1994 20:25:09 +0100
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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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Ruler subclass:#VerticalRuler
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	 instanceVariableNames:''
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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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VerticalRuler comment:'
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COPYRIGHT (c) 1991 by Claus Gittinger
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	      All Rights Reserved
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'!
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!VerticalRuler 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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	      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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$Header: /cvs/stx/stx/libwidg2/VerticalRuler.st,v 1.3 1994-12-21 19:25:09 claus Exp $
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"
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!
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documentation
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"
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    like a Ruler, but vertical.
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    see documentation in Ruler
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"
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! !
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!VerticalRuler methodsFor:'accessing'!
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paperHeightInch:inches
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    "set the width of the document"
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    paperHeight := 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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paperHeightMM:millis
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    "set the width of the document"
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    paperHeight := 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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!VerticalRuler methodsFor:'redrawing'!
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redraw
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    "redraw the scale"
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    |y pixelPerMM pixelPerInch mod pos shortLen veryShortLen longLen charX
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     left paperHeightMM paperHeightPixel yOrigin labelBot marg fontHeight|
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    shown ifFalse:[^ self].
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    self clear.
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    yOrigin := self viewOrigin y.
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    paperHeightPixel := ((self inchToPixel:paperHeight) * scale) rounded.
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    (yOrigin + height > paperHeightPixel) ifTrue:[
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	self paint:(Color darkGrey).
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	self fillRectangleX:0 y:paperHeightPixel - yOrigin
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		      width:width
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		      height:(height - (paperHeightPixel - yOrigin)).
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	self paint:fgColor.
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	self displayLineFromX:0 y:paperHeightPixel - yOrigin
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			  toX:width y:paperHeightPixel - yOrigin
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    ].
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    self paint:fgColor.
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    left := 0. "width - (font widthOf:'WW')"
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    longLen := font widthOf:'WW'.
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    shortLen := longLen // 2.
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    charX := left + shortLen.
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    mod := 1.
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    marg := 3. "character shift"
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    fontHeight := font height.
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    (metric == #mm) ifTrue:[
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	"centimeter - long blibs every centimeter; short ones every half"
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	paperHeightMM := self inchToMillimeter:paperHeight.
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	pixelPerMM := (self millimeterToPixel:1) * scale.
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	pos := 5.
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	showUnit ifTrue:[
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	    labelBot := marg + font height + font ascent.
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	] ifFalse:[
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	    labelBot := 0
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	].
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	y := (pixelPerMM * pos - yOrigin) rounded.
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	[(y < height) and:[pos <= paperHeightMM]] whileTrue:[
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	    |l|
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	    l := shortLen.
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	    (mod ~~ 1) ifTrue:[
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		y < labelBot ifFalse:[
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		    l := longLen
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		]
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	    ].
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	    self displayLineFromX:left y:y toX:(left + l) y:y.
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	    (mod ~~ 1 and:[y >= labelBot]) ifTrue:[
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		self displayString:(pos // 10) printString
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				 x:charX
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				 y:(y + marg + fontHeight)
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	    ].
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	    mod := (mod + 1) \\ 2.
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	    pos := pos + 5.
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	    y := (pixelPerMM * pos - yOrigin) rounded 
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	].
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	showUnit ifTrue:[
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	    self displayString:'cm ' x:charX y:marg + fontHeight.
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	]
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    ].
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    (metric == #inch) ifTrue:[
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	"inches - long blibs every inch; short ones every half; very
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	 short ones every quarter"
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	pixelPerInch := (self inchToPixel:1) * scale.
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	pos := 0.25.
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	showUnit ifTrue:[
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	    labelBot := marg + (font height + font ascent).
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	] ifFalse:[
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	    labelBot := 0
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	].
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	y := (pixelPerInch * pos - yOrigin) rounded.
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	veryShortLen := longLen // 4.
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	[(y < height) and:[pos <= paperHeight]] whileTrue:[
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	    |l|
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	    l := shortLen.
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	    (mod == 0) ifTrue:[
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		y < labelBot ifFalse:[
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		    l := longLen.
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		]
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	    ] ifFalse:[
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		(mod == 2) ifFalse:[
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		    l := veryShortLen
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		]
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	    ].
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	    self displayLineFromX:left y:y toX:(left + l) y:y.
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	    (mod == 0) ifTrue:[
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		y < labelBot ifFalse:[
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		    self displayString:pos asInteger printString
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				     x:charX
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				     y:(y + marg + fontHeight)
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		]
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	    ].
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	    mod := (mod + 1) \\ 4.
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	    pos := pos + 0.25.
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	    y := (pixelPerInch * pos - yOrigin) rounded
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	].
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	showUnit ifTrue:[
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	    self displayString:'inch ' x:charX y:marg + fontHeight.
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	]
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    ].
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    self redrawEdges
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! !
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!VerticalRuler methodsFor:'initialization'!
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initialize
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    super initialize.
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    self width:(font widthOf:'inch').
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    "
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     VerticalRuler new open
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    "
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! !
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