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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 import 'dart:math' as math; | 5 import 'dart:math' as math; |
6 | 6 |
7 import 'box.dart'; | 7 import 'box.dart'; |
8 import 'object.dart'; | 8 import 'object.dart'; |
9 | 9 |
10 class StackParentData extends BoxParentData with ContainerParentDataMixin<Render
Box> { | 10 class StackParentData extends BoxParentData with ContainerParentDataMixin<Render
Box> { |
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143 assert(size.width < double.INFINITY); | 143 assert(size.width < double.INFINITY); |
144 assert(size.height < double.INFINITY); | 144 assert(size.height < double.INFINITY); |
145 assert(size.width == constraints.constrainWidth(width)); | 145 assert(size.width == constraints.constrainWidth(width)); |
146 assert(size.height == constraints.constrainHeight(height)); | 146 assert(size.height == constraints.constrainHeight(height)); |
147 | 147 |
148 BoxConstraints innerConstraints = new BoxConstraints.loose(size); | 148 BoxConstraints innerConstraints = new BoxConstraints.loose(size); |
149 | 149 |
150 child = firstChild; | 150 child = firstChild; |
151 while (child != null) { | 151 while (child != null) { |
152 assert(child.parentData is StackParentData); | 152 assert(child.parentData is StackParentData); |
153 final StackParentData parentData = child.parentData; | 153 final StackParentData childData = child.parentData; |
154 | 154 |
155 if (parentData.isPositioned) { | 155 if (childData.isPositioned) { |
156 BoxConstraints childConstraints = innerConstraints; | 156 BoxConstraints childConstraints = innerConstraints; |
157 | 157 |
158 if (parentData.left != null && parentData.right != null) | 158 if (childData.left != null && childData.right != null) |
159 childConstraints = childConstraints.applyWidth(parentData.right - pare
ntData.left); | 159 childConstraints = childConstraints.applyWidth(childData.right - child
Data.left); |
160 else if (parentData.left != null) | 160 else if (childData.left != null) |
161 childConstraints = childConstraints.applyMaxWidth(size.width - parentD
ata.left); | 161 childConstraints = childConstraints.applyMaxWidth(size.width - childDa
ta.left); |
162 else if (parentData.right != null) | 162 else if (childData.right != null) |
163 childConstraints = childConstraints.applyMaxWidth(size.width - parentD
ata.right); | 163 childConstraints = childConstraints.applyMaxWidth(size.width - childDa
ta.right); |
164 | 164 |
165 if (parentData.top != null && parentData.bottom != null) | 165 if (childData.top != null && childData.bottom != null) |
166 childConstraints = childConstraints.applyHeight(parentData.bottom - pa
rentData.top); | 166 childConstraints = childConstraints.applyHeight(childData.bottom - chi
ldData.top); |
167 else if (parentData.top != null) | 167 else if (childData.top != null) |
168 childConstraints = childConstraints.applyMaxHeight(size.height - paren
tData.top); | 168 childConstraints = childConstraints.applyMaxHeight(size.height - child
Data.top); |
169 else if (parentData.bottom != null) | 169 else if (childData.bottom != null) |
170 childConstraints = childConstraints.applyMaxHeight(size.width - parent
Data.bottom); | 170 childConstraints = childConstraints.applyMaxHeight(size.width - childD
ata.bottom); |
171 | 171 |
172 child.layout(childConstraints); | 172 child.layout(childConstraints, parentUsesSize: true); |
173 | 173 |
174 double x = 0.0; | 174 double x = 0.0; |
175 if (parentData.left != null) | 175 if (childData.left != null) |
176 x = parentData.left; | 176 x = childData.left; |
177 else if (parentData.right != null) | 177 else if (childData.right != null) |
178 x = size.width - parentData.right - child.size.width; | 178 x = size.width - childData.right - child.size.width; |
179 assert(x >= 0.0 && x + child.size.width <= size.width); | 179 assert(x >= 0.0 && x + child.size.width <= size.width); |
180 | 180 |
181 double y = 0.0; | 181 double y = 0.0; |
182 if (parentData.top != null) | 182 if (childData.top != null) |
183 y = parentData.top; | 183 y = childData.top; |
184 else if (parentData.bottom != null) | 184 else if (childData.bottom != null) |
185 y = size.height - parentData.bottom - child.size.height; | 185 y = size.height - childData.bottom - child.size.height; |
186 assert(y >= 0.0 && y + child.size.height <= size.height); | 186 assert(y >= 0.0 && y + child.size.height <= size.height); |
187 | 187 |
188 parentData.position = new Point(x, y); | 188 childData.position = new Point(x, y); |
189 } | 189 } |
190 | 190 |
191 child = parentData.nextSibling; | 191 child = childData.nextSibling; |
192 } | 192 } |
193 } | 193 } |
194 | 194 |
195 void hitTestChildren(HitTestResult result, { Point position }) { | 195 void hitTestChildren(HitTestResult result, { Point position }) { |
196 defaultHitTestChildren(result, position: position); | 196 defaultHitTestChildren(result, position: position); |
197 } | 197 } |
198 | 198 |
199 void paint(RenderCanvas canvas) { | 199 void paint(RenderCanvas canvas) { |
200 defaultPaint(canvas); | 200 defaultPaint(canvas); |
201 } | 201 } |
202 } | 202 } |
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