fzhangtj
6 年前
当前提交
d773fc6e
共有 6 个文件被更改，包括 407 次插入 和 0 次删除
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49Runtime/widgets/basic.cs
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73Samples/UIWidgetSample/Navigation.unity
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194Runtime/widgets/custom_paint.cs
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11Runtime/widgets/custom_paint.cs.meta
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69Samples/UIWidgetSample/CustomPaintCanvas.cs
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11Samples/UIWidgetSample/CustomPaintCanvas.cs.meta
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using Unity.UIWidgets.foundation; |
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using Unity.UIWidgets.gestures; |
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using Unity.UIWidgets.rendering; |
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using Unity.UIWidgets.ui; |
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namespace Unity.UIWidgets.widgets { |
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public abstract class CustomPainter : Listenable { |
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public CustomPainter(Listenable repaint) { |
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this._repaint = repaint; |
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} |
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readonly Listenable _repaint; |
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public void addListener(VoidCallback listener) { |
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this._repaint?.addListener(listener); |
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} |
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public void removeListener(VoidCallback listener) { |
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this._repaint?.removeListener(listener); |
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} |
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public abstract void paint(Canvas canvas, Size size); |
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public abstract bool shouldRepaint(CustomPainter oldDelegate); |
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public virtual bool hitTest(Offset position) { |
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return false; |
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} |
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public override string ToString() { |
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return $"{Diagnostics.describeIdentity(this)}({this._repaint?.ToString() ?? ""})"; |
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} |
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} |
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public class RenderCustomPaint : RenderProxyBox { |
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public RenderCustomPaint( |
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CustomPainter painter = null, |
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CustomPainter foregroundPainter = null, |
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Size preferredSize = null, |
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bool isComplex = false, |
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bool willChange = false, |
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RenderBox child = null |
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): base(child) { |
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preferredSize = preferredSize ?? Size.zero; |
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this.preferredSize = preferredSize; |
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this._painter = painter; |
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this._foregroundPainter = foregroundPainter; |
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this.isComplex = isComplex; |
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this.willChange = willChange; |
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} |
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CustomPainter _painter; |
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public CustomPainter painter { |
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get => this._painter; |
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set { |
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if (this._painter == value) |
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return; |
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CustomPainter oldPainter = this._painter; |
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this._painter = value; |
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this._didUpdatePainter(this._painter, oldPainter); |
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} |
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} |
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CustomPainter _foregroundPainter; |
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public CustomPainter foregroundPainter { |
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get => this._foregroundPainter; |
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set { |
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if (this._foregroundPainter == value) |
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return; |
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CustomPainter oldPainter = this._foregroundPainter; |
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this._foregroundPainter = value; |
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this._didUpdatePainter(this._foregroundPainter, oldPainter); |
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} |
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} |
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void _didUpdatePainter(CustomPainter newPainter, CustomPainter oldPainter) { |
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if (newPainter == null) { |
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D.assert(oldPainter != null); |
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this.markNeedsPaint(); |
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} |
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else if (oldPainter == null || |
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newPainter.GetType() != oldPainter.GetType() || |
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newPainter.shouldRepaint(oldPainter)) { |
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this.markNeedsPaint(); |
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} |
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if (this.attached) { |
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oldPainter?.removeListener(this.markNeedsPaint); |
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newPainter?.addListener(this.markNeedsPaint); |
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} |
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} |
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Size _preferredSize; |
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public Size preferredSize { |
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get => this._preferredSize; |
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set { |
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D.assert(value != null); |
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if (this.preferredSize == value) |
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return; |
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this._preferredSize = value; |
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this.markNeedsLayout(); |
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} |
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} |
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public bool isComplex; |
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public bool willChange; |
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public override void attach(object owner) { |
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base.attach(owner); |
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this._painter?.addListener(this.markNeedsPaint); |
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this._foregroundPainter?.addListener(this.markNeedsPaint); |
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} |
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public override void detach() { |
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this._painter?.removeListener(this.markNeedsPaint); |
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this._foregroundPainter?.removeListener(this.markNeedsPaint); |
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base.detach(); |
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} |
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protected override bool hitTestChildren(HitTestResult result, Offset position) { |
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if (this._foregroundPainter != null && (this._foregroundPainter.hitTest(position))) |
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return true; |
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return base.hitTestChildren(result, position: position); |
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} |
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protected override bool hitTestSelf(Offset position) { |
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return this._painter != null && this._painter.hitTest(position); |
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} |
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protected override void performResize() { |
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this.size = this.constraints.constrain(this.preferredSize); |
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} |
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void _paintWithPainter(Canvas canvas, Offset offset, CustomPainter painter) { |
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int debugPreviousCanvasSaveCount = 0; |
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canvas.save(); |
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D.assert(() => { |
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debugPreviousCanvasSaveCount = canvas.getSaveCount(); |
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return true; |
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}); |
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if (offset != Offset.zero) |
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canvas.translate(offset.dx, offset.dy); |
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painter.paint(canvas, this.size); |
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D.assert(() => { |
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int debugNewCanvasSaveCount = canvas.getSaveCount(); |
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if (debugNewCanvasSaveCount > debugPreviousCanvasSaveCount) |
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throw new UIWidgetsError( |
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$"{debugNewCanvasSaveCount - debugPreviousCanvasSaveCount} more " + |
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$"time{((debugNewCanvasSaveCount - debugPreviousCanvasSaveCount == 1) ? "" : "s")} " + |
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"than it called canvas.restore().\n" + |
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"This leaves the canvas in an inconsistent state and will probably result in a broken display.\n" + |
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"You must pair each call to save()/saveLayer() with a later matching call to restore()." |
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); |
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if (debugNewCanvasSaveCount < debugPreviousCanvasSaveCount) |
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throw new UIWidgetsError( |
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$"The {painter} custom painter called canvas.restore() " + |
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$"{debugPreviousCanvasSaveCount - debugNewCanvasSaveCount} more " + |
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$"time{(debugPreviousCanvasSaveCount - debugNewCanvasSaveCount == 1 ? "" : "s")} " + |
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"than it called canvas.save() or canvas.saveLayer().\n" + |
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"This leaves the canvas in an inconsistent state and will result in a broken display.\n" + |
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"You should only call restore() if you first called save() or saveLayer()." |
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); |
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return debugNewCanvasSaveCount == debugPreviousCanvasSaveCount; |
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}); |
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canvas.restore(); |
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} |
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public override void paint(PaintingContext context, Offset offset) { |
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if (this._painter != null) { |
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this._paintWithPainter(context.canvas, offset, this._painter); |
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this._setRasterCacheHints(context); |
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} |
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base.paint(context, offset); |
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if (this._foregroundPainter != null) { |
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this._paintWithPainter(context.canvas, offset, this._foregroundPainter); |
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this._setRasterCacheHints(context); |
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} |
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} |
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void _setRasterCacheHints(PaintingContext context) { |
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if (this.isComplex) |
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context.setIsComplexHint(); |
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if (this.willChange) |
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context.setWillChangeHint(); |
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} |
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} |
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} |
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fileFormatVersion: 2 |
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guid: a4b3c34c9775f4b9995fb37535490751 |
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MonoImporter: |
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externalObjects: {} |
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serializedVersion: 2 |
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defaultReferences: [] |
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executionOrder: 0 |
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icon: {instanceID: 0} |
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userData: |
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assetBundleName: |
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assetBundleVariant: |
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using Unity.UIWidgets.engine; |
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using Unity.UIWidgets.foundation; |
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using Unity.UIWidgets.ui; |
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using Unity.UIWidgets.widgets; |
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namespace UIWidgetsSample { |
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public class CustomPaintCanvas: WidgetCanvas { |
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protected override Widget getWidget() { |
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return new CustomPaint( |
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child: new Container(width: 300, height: 300, color: new Color(0XFFFFFFFF)), |
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foregroundPainter: new GridPainter(null) |
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); |
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} |
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} |
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public class GridPainter : CustomPainter { |
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public GridPainter(Listenable repaint) : base(repaint) { |
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} |
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public override void paint(Canvas canvas, Size size) { |
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int numGrid = 4; |
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var paint = new Paint(); |
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paint.color = new Color(0xFFFF0000); |
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paint.strokeWidth = 2; |
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paint.style = PaintingStyle.stroke; |
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for (int i = 1; i < numGrid; i++) { |
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double offsetY = size.height * i / numGrid; |
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canvas.drawLine(new Offset(0, offsetY), new Offset(size.width, offsetY), |
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paint); |
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} |
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for (int i = 1; i < numGrid; i++) { |
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double offsetx = size.width * i / numGrid; |
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canvas.drawLine(new Offset(offsetx, 0), new Offset(offsetx, size.height), |
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paint); |
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} |
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// draw a arrow line
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canvas.save(); |
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canvas.rotate(0.4); |
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canvas.scale(2, 2); |
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canvas.translate(50, 50); |
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canvas.drawLine(new Offset(0, 0), new Offset(100, 0), |
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new Paint(){ |
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color = new Color(0xFFFF0000), |
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strokeWidth = 2, |
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style = PaintingStyle.stroke |
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}); |
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var path = new Path(); |
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var arrowPaint = new Paint() { |
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color = new Color(0xFFFF0000), |
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style = PaintingStyle.fill |
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}; |
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path.moveTo(100, 0); |
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path.lineTo(100, 5); |
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path.lineTo(120, 0); |
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path.lineTo(100, -5); |
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path.close(); |
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canvas.drawPath(path, arrowPaint); |
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canvas.restore(); |
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} |
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public override bool shouldRepaint(CustomPainter oldDelegate) { |
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return false; |
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} |
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} |
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} |
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fileFormatVersion: 2 |
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guid: 5debfd6de8ea942d487383a56aad8491 |
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MonoImporter: |
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externalObjects: {} |
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serializedVersion: 2 |
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defaultReferences: [] |
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executionOrder: 0 |
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icon: {instanceID: 0} |
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userData: |
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assetBundleName: |
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assetBundleVariant: |
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