author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Tue, 01 Mar 2016 16:10:07 +0000 | |
changeset 57 | 2c9a342e1f2a |
parent 53 | 57718b3ac316 |
child 63 | 054f0513ea65 |
permissions | -rw-r--r-- |
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"{ Package: 'stx:goodies/libcairo' }" |
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"{ NameSpace: Cairo }" |
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AbstractExamples subclass:#Examples1 |
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instanceVariableNames:'' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Cairo-Examples' |
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! |
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!Examples1 methodsFor:'examples'! |
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example01: cr <example: '01 - arc'> |
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| xc yc radius angle1 angle2 | |
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xc := 128. |
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yc := 128. |
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radius := 100. |
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angle1 := 45 * (Float pi / 180). |
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angle2 := 180 * (Float pi / 180). |
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cr sourceR: 1.0 G: 1.0 B: 1.0. |
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cr lineWidth: 10. |
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cr arcX: xc y: yc radius: radius from: angle1 to: angle2. |
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cr stroke. |
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"Created: / 26-02-2016 / 21:53:02 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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example21: cr <example: '21 - Display PNG from file'> |
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| png | |
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png := Cairo::Surface newPNGWithFile: (Smalltalk getBitmapFileName:'circle1.png' forPackage:#'stx:goodies/libcairo') pathName. |
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cr sourceR: 1 G: 1 B: 1. |
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cr rectangleX: 0 y: 0 width: 32 height: 32. |
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cr fill. |
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cr sourceR: 0 G: 0 B: 0. |
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cr rectangleX: 32 y: 32 width: 32 height: 32. |
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cr fill. |
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cr sourceSurface: png x: 0 y: 0. |
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cr paint. |
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"Created: / 28-02-2016 / 07:56:02 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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example22: cr <example: '22 - Rectangles - fill and stroke'> |
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" |
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Shows how stroke,fill and lineWidth plays together |
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cr lineWidth: 1. |
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cr sourceR: 0 G: 0 B: 0. |
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cr moveToX: 1 y: 15. |
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cr lineToX: 130 y: 15. |
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cr moveToX: 15 y: 1. |
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cr lineToX: 15 y: 130. |
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cr moveToX: 1 y: 115. |
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cr lineToX: 130 y: 115. |
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cr moveToX: 115 y: 1. |
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cr lineToX: 115 y: 130. |
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cr stroke. |
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cr lineWidth: 10. |
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cr sourceR: 1 G: 0 B: 0. |
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cr rectangleX: 15 y: 15 width: 100 height: 100. |
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cr stroke. |
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cr sourceR: 0 G: 0 B: 1. |
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cr rectangleX: 15 y: 65 width: 50 height: 50. |
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cr fill. |
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"Created: / 28-02-2016 / 15:09:30 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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"Modified: / 02-03-2016 / 21:10:51 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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example24: cr <example: '24 - Transparency'> |
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" |
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Shows half-transparent rounded rectangle over a |
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black-n-white checker board. Rounded corners are |
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antialiased for better look. |
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" |
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| black white x y w h r pi | |
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"Display s checker board" |
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black := Color black. |
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white := Color white. |
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cr lineWidth:0. |
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1 to: 8 do:[:x | |
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1 to: 8 do:[:y | |
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cr source: ((x + y) even ifTrue:[ black ] ifFalse:[ white ]). |
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cr rectangleX: ((x - 1) * 32) + 1 |
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y: ((y - 1) * 32) + 1 |
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width: 32 |
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height: 32. |
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cr fill. |
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] |
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]. |
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"Show 50% transparent blue rectangle with 25% transparent |
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red border. First, create the path:" |
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x := 16. |
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y := 16. |
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w := 32 * 7. |
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h := 32 * 7. |
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r := 8. |
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pi := Float pi. |
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"top-left arc" |
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cr arcX: x + r y: y + r radius: r from: pi to: (3/2) * pi. |
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" top-right arc" |
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cr arcX: x + w - r y: y + r radius: r from: (3/2) * pi to: 0.0. |
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"bottom-right arc" |
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cr arcX: x + w - r y: y + h - r radius: r from: 0.0 to: (1/2) * pi. |
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"bottom-left atc" |
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cr arcX: x + r y: y + h - r radius: r from: (1/2) * pi to: pi. |
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cr closePath. |
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"Show the border" |
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cr lineWidth: 10. |
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cr sourceR: 1 G: 0 B: 0 A: 0.75. |
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cr strokeAndPreserve. |
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cr sourceR: 0 G: 0 B: 1 A: 0.5. |
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cr fill. |
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"Created: / 29-02-2016 / 18:45:59 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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!Examples1 methodsFor:'private'! |
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performTest |
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self performTestDrawingView: view |
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"Created: / 26-02-2016 / 22:01:46 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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"Modified: / 01-03-2016 / 10:59:24 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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performTestDrawingView: aView |
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| cr | |
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cr := Cairo::GraphicsContext onSurface: aView cairoSurface. |
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view transformation notNil ifTrue:[ |
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cr scale: view transformation scale. |
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cr translate: view transformation translation. |
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]. |
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[ |
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self perform:testSelector sunitAsSymbol with:cr. |
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] ensure:[ |
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cr release |
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]. |
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"Created: / 01-03-2016 / 10:57:17 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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!Examples1 methodsFor:'utilities - wiki'! |
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writeMarkdownOutputOn: aStream |
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| name base | |
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name := self name. |
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base := self screenshotFilename. |
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aStream nextPutAll: 'Output'; cr; cr. |
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aStream nextPutAll: '| '. |
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#(windows linux) do:[:os | |
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self writeMarkdownLinkTo: ('%1_%2_100.png' bindWith: base with: os) text: ('%2' bindWith: name with: os capitalized) on: aStream. |
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aStream space. |
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aStream nextPut: $(. |
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self writeMarkdownLinkTo: ('%1_%2_800.png' bindWith: base with: os) text: '800%' on: aStream. |
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aStream nextPut: $). |
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aStream nextPutAll: ' | '. |
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]. |
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aStream cr; cr. |
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self writeMarkdownLinkTo: ('%1_windows_100.png' bindWith: base) text: name inline: true on: aStream. |
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aStream cr; cr. |
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"Created: / 01-03-2016 / 22:12:19 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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"Modified: / 02-03-2016 / 22:29:28 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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