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ee88a685f8
Previously, we triggered a layout (and hence a repaint) when sliding the draw because we gave the draw loose constraints. The drawer uses an Align to move itself to the proper side of the screen, so it can have tight constraints, which makes it a layout boundary. Also, don't trigger a layout just because the Scaffold rebuilds. There isn't any state in the scaffold custom layout, so it doesn't need to repaint just because we created a new instance of the delegate. Finally, add the debugging infrastructure I used to find these issues.
136 lines
4.5 KiB
Dart
136 lines
4.5 KiB
Dart
// Copyright 2015 The Chromium 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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import 'dart:async';
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import 'dart:convert' show JSON;
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import 'dart:developer' as developer;
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import 'dart:ui' as ui;
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import 'package:flutter/painting.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/scheduler.dart';
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export 'package:flutter/services.dart' show debugPrint;
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/// Causes each RenderBox to paint a box around its bounds.
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bool debugPaintSizeEnabled = false;
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/// The color to use when painting RenderObject bounds.
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ui.Color debugPaintSizeColor = const ui.Color(0xFF00FFFF);
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/// Causes each RenderBox to paint a line at each of its baselines.
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bool debugPaintBaselinesEnabled = false;
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/// The color to use when painting alphabetic baselines.
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ui.Color debugPaintAlphabeticBaselineColor = const ui.Color(0xFF00FF00);
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/// The color ot use when painting ideographic baselines.
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ui.Color debugPaintIdeographicBaselineColor = const ui.Color(0xFFFFD000);
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/// Causes each Layer to paint a box around its bounds.
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bool debugPaintLayerBordersEnabled = false;
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/// The color to use when painting Layer borders.
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ui.Color debugPaintLayerBordersColor = const ui.Color(0xFFFF9800);
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/// Causes RenderBox objects to flash while they are being tapped
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bool debugPaintPointersEnabled = false;
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/// The color to use when reporting pointers.
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int debugPaintPointersColorValue = 0x00BBBB;
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/// The color to use when painting RenderError boxes in checked mode.
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ui.Color debugErrorBoxColor = const ui.Color(0xFFFF0000);
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/// Overlay a rotating set of colors when repainting layers in checked mode.
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bool debugEnableRepaintRainbox = false;
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/// The current color to overlay when repainting a layer.
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HSVColor debugCurrentRepaintColor = const HSVColor.fromAHSV(0.4, 60.0, 1.0, 1.0);
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/// The amount to increment the hue of the current repaint color.
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double debugRepaintRainboxHueIncrement = 2.0;
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/// Log the call stacks that mark render objects as needing paint.
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bool debugPrintMarkNeedsPaintStacks = false;
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/// Log the call stacks that mark render objects as needing layout.
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bool debugPrintMarkNeedsLayoutStacks = false;
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List<String> debugDescribeTransform(Matrix4 transform) {
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List<String> matrix = transform.toString().split('\n').map((String s) => ' $s').toList();
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matrix.removeLast();
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return matrix;
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}
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bool _extensionsInitialized = false;
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void initServiceExtensions() {
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if (_extensionsInitialized)
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return;
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_extensionsInitialized = true;
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assert(() {
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developer.registerExtension('flutter', _flutter);
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developer.registerExtension('flutter.debugPaint', _debugPaint);
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developer.registerExtension('flutter.timeDilation', _timeDilation);
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// Emit an info level log message; this tells the debugger that the Flutter
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// service extensions are registered.
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developer.log('Flutter initialized', name: 'flutter', level: 800);
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return true;
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});
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}
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/// Just respond to the request. Clients can use the existence of this call to
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/// know that the debug client is a Flutter app.
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Future<developer.ServiceExtensionResponse> _flutter(String method, Map<String, String> parameters) {
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return new Future<developer.ServiceExtensionResponse>.value(
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new developer.ServiceExtensionResponse.result(JSON.encode({
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'type': '_extensionType',
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'method': method
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}))
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);
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}
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/// Toggle the [debugPaintSizeEnabled] setting.
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Future<developer.ServiceExtensionResponse> _debugPaint(String method, Map<String, String> parameters) {
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if (parameters.containsKey('enabled')) {
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debugPaintSizeEnabled = parameters['enabled'] == 'true';
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// Redraw everything - mark the world as dirty.
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RenderObjectVisitor visitor;
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visitor = (RenderObject child) {
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child.markNeedsPaint();
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child.visitChildren(visitor);
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};
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Renderer.instance?.renderView?.visitChildren(visitor);
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}
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return new Future<developer.ServiceExtensionResponse>.value(
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new developer.ServiceExtensionResponse.result(JSON.encode({
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'type': '_extensionType',
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'method': method,
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'enabled': debugPaintSizeEnabled
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}))
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);
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}
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/// Manipulate the scheduler's [timeDilation] field.
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Future<developer.ServiceExtensionResponse> _timeDilation(String method, Map<String, String> parameters) {
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if (parameters.containsKey('timeDilation')) {
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timeDilation = double.parse(parameters['timeDilation']);
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}
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return new Future<developer.ServiceExtensionResponse>.value(
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new developer.ServiceExtensionResponse.result(JSON.encode({
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'type': '_extensionType',
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'method': method,
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'timeDilation': '$timeDilation'
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}))
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);
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}
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