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fb0b982324
* Redesigns the interface between MouseTracker and RendererBinding&RenderView. * Simplifies the structure of RenderMouseRegion. * Extracts the common utility code between mouse_tracker_test and mouse_tracker_cursor_test.
108 lines
3.2 KiB
Dart
108 lines
3.2 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// @dart = 2.8
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import 'dart:ui' as ui;
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/gestures.dart';
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import 'package:flutter/scheduler.dart';
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import 'package:flutter/services.dart';
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import 'package:vector_math/vector_math_64.dart' show Matrix4;
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class _TestHitTester extends RenderBox {
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_TestHitTester(this.hitTestOverride);
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final BoxHitTest hitTestOverride;
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@override
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bool hitTest(BoxHitTestResult result, {ui.Offset position}) {
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return hitTestOverride(result, position);
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}
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}
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// A binding used to test MouseTracker, allowing the test to override hit test
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// searching.
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class TestMouseTrackerFlutterBinding extends BindingBase
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with SchedulerBinding, ServicesBinding, GestureBinding, SemanticsBinding, RendererBinding {
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@override
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void initInstances() {
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super.initInstances();
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postFrameCallbacks = <void Function(Duration)>[];
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}
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void setHitTest(BoxHitTest hitTest) {
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renderView.child = _TestHitTester(hitTest);
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}
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SchedulerPhase _overridePhase;
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@override
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SchedulerPhase get schedulerPhase => _overridePhase ?? super.schedulerPhase;
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// Manually schedule a post-frame check.
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//
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// In real apps this is done by the renderer binding, but in tests we have to
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// bypass the phase assertion of [MouseTracker.schedulePostFrameCheck].
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void scheduleMouseTrackerPostFrameCheck() {
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final SchedulerPhase lastPhase = _overridePhase;
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_overridePhase = SchedulerPhase.persistentCallbacks;
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addPostFrameCallback((_) {
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mouseTracker.updateAllDevices(renderView.hitTestMouseTrackers);
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});
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_overridePhase = lastPhase;
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}
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List<void Function(Duration)> postFrameCallbacks;
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// Proxy post-frame callbacks.
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@override
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void addPostFrameCallback(void Function(Duration) callback) {
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postFrameCallbacks.add(callback);
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}
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void flushPostFrameCallbacks(Duration duration) {
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for (final void Function(Duration) callback in postFrameCallbacks) {
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callback(duration);
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}
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postFrameCallbacks.clear();
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}
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}
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// An object that mocks the behavior of a render object with [MouseTrackerAnnotation].
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class TestAnnotationTarget with Diagnosticable implements MouseTrackerAnnotation, HitTestTarget {
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const TestAnnotationTarget({this.onEnter, this.onHover, this.onExit, this.cursor = MouseCursor.defer});
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@override
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final PointerEnterEventListener onEnter;
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@override
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final PointerHoverEventListener onHover;
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@override
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final PointerExitEventListener onExit;
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@override
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final MouseCursor cursor;
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@override
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void handleEvent(PointerEvent event, HitTestEntry entry) {
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if (event is PointerHoverEvent)
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if (onHover != null)
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onHover(event);
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}
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}
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// A hit test entry that can be assigned with a [TestAnnotationTarget] and an
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// optional transform matrix.
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class TestAnnotationEntry extends HitTestEntry {
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TestAnnotationEntry(TestAnnotationTarget target, [Matrix4 transform])
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: transform = transform ?? Matrix4.identity(), super(target);
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@override
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final Matrix4 transform;
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}
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