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93 行
3.2 KiB

using System;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.gestures;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.rendering {
public class RendererBinding : PaintingBinding {
public new static RendererBinding instance {
get { return (RendererBinding) PaintingBinding.instance; }
set { PaintingBinding.instance = value; }
}
public RendererBinding() {
this._pipelineOwner = new PipelineOwner(
onNeedVisualUpdate: this.ensureVisualUpdate
);
Window.instance.onMetricsChanged += this.handleMetricsChanged;
Window.instance.onTextScaleFactorChanged += this.handleTextScaleFactorChanged;
this.initRenderView();
D.assert(this.renderView != null);
this.addPersistentFrameCallback(this._handlePersistentFrameCallback);
this._mouseTracker = this._createMouseTracker();
}
public void initRenderView() {
D.assert(this.renderView == null);
this.renderView = new RenderView(configuration: this.createViewConfiguration());
this.renderView.scheduleInitialFrame();
}
public MouseTracker mouseTracker {
get { return this._mouseTracker; }
}
MouseTracker _mouseTracker;
public PipelineOwner pipelineOwner {
get { return this._pipelineOwner; }
}
readonly PipelineOwner _pipelineOwner;
public RenderView renderView {
get { return (RenderView) this._pipelineOwner.rootNode; }
set { this._pipelineOwner.rootNode = value; }
}
protected virtual void handleMetricsChanged() {
this.renderView.configuration = this.createViewConfiguration();
this.scheduleForcedFrame();
}
protected virtual void handleTextScaleFactorChanged() {
}
protected virtual void handlePlatformBrightnessChanged() {
}
protected virtual ViewConfiguration createViewConfiguration() {
var devicePixelRatio = Window.instance.devicePixelRatio;
return new ViewConfiguration(
size: Window.instance.physicalSize / devicePixelRatio,
devicePixelRatio: devicePixelRatio
);
}
void _handlePersistentFrameCallback(TimeSpan timeStamp) {
this.drawFrame();
}
MouseTracker _createMouseTracker() {
return new MouseTracker(this.pointerRouter, (Offset offset) => {
return this.renderView.layer.find<MouseTrackerAnnotation>(
offset
);
});
}
protected virtual void drawFrame() {
this.pipelineOwner.flushLayout();
this.pipelineOwner.flushCompositingBits();
this.pipelineOwner.flushPaint();
this.renderView.compositeFrame();
}
public override void hitTest(HitTestResult result, Offset position) {
D.assert(this.renderView != null);
this.renderView.hitTest(result, position: position);
base.hitTest(result, position);
}
}
}