85 lines
2.6 KiB
HTML
85 lines
2.6 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>PIXI LabeledGraphics</title>
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<link rel="stylesheet" href="../3rdparty/highlight/styles/default.css">
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<link rel="stylesheet" href="../../css/doctest.css">
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<script src="../3rdparty/highlight/highlight.pack.js"></script>
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<script src="../../dist/iwmlib.3rdparty.js"></script>
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<script src="../../dist/iwmlib.js"></script>
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<script src="../../dist/iwmlib.pixi.js"></script>
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</head>
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<body onload="Doctest.run()">
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<h1>LabeledGraphics</h1>
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<p>
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A labeled graphics extends the PIXI.Graphics class with an ensureLabel method that allows
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to place and reuse labels, i.e. PIXI.Text objects. The labels are cached by a given key
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and only rendered anew if necessary.
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</p>
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<p><a href="../../doc/out/LabeledGraphics.html">JavaScript API</a></p>
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<p>Let's look at an example:</p><br />
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<canvas id="canvas1" class="interactive"></canvas>
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<p>
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What you should see: A box with a label.
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</p>
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<script class="doctest">
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const app = new PIXIApp({
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view: canvas1,
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width: 900,
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height: 150
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}).setup().run()
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const labeledBox = new LabeledGraphics()
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labeledBox.ensureLabel('key', 'This is a label in a box', { justify: 'top'})
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labeledBox.beginFill(0x333333)
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labeledBox.drawRect(0, 0, 300, 100)
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labeledBox.endFill()
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app.scene.addChild(labeledBox)
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</script>
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<h2>Zoomable Labels</h2>
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<p>Labeled graphics can also be used to represent zoomable text columns in more complex layouts.
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Use the mousewheel to zoom the following text column:
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</p>
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<canvas id="canvas2" class="interactive"></canvas>
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<script class="doctest">
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const app2 = new PIXIApp({
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view: canvas2,
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width: 900,
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height: 150
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}).setup().run()
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const loremIpsum = `Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.
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At vero eos et accusam et justo duo dolores et ea rebum.`
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const column = new LabeledGraphics()
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const text = column.ensureLabel('key', loremIpsum, { maxWidth: 250, zoomFonts: true, justify: 'top', align: 'align'})
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column.beginFill(0x333333)
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column.drawRect(0, 0, 900, 150)
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column.endFill()
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column.interactive = true
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text.interactive = true
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text.getLocalBounds()
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text.on('zoom', (event) => {
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let factor = 1.0 + event.wheelDelta / 1000
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text.zoom(factor)
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})
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app2.view.addEventListener('mousewheel', (event) => {
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text.emit('zoom', event)
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event.preventDefault()
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})
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app2.scene.addChild(column)
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</script>
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</body>
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