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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "views/layout/center_layout.h" |
| 6 |
| 7 #include "base/logging.h" |
| 8 |
| 9 namespace views { |
| 10 |
| 11 //////////////////////////////////////////////////////////////////////////////// |
| 12 // CenterLayout, public: |
| 13 |
| 14 CenterLayout::CenterLayout() { |
| 15 } |
| 16 |
| 17 CenterLayout::~CenterLayout() { |
| 18 } |
| 19 |
| 20 //////////////////////////////////////////////////////////////////////////////// |
| 21 // CenterLayout, LayoutManager implementation: |
| 22 |
| 23 void CenterLayout::Layout(View* host) { |
| 24 if (!host->has_children()) |
| 25 return; |
| 26 |
| 27 DCHECK_EQ(1, host->child_count()); |
| 28 View* child = host->child_at(0); |
| 29 gfx::Size size(child->GetPreferredSize()); |
| 30 gfx::Rect child_area(host->GetLocalBounds()); |
| 31 child_area.Inset(host->GetInsets()); |
| 32 size.set_width(std::min(size.width(), child_area.width())); |
| 33 int child_height = child->GetHeightForWidth(size.width()); |
| 34 size.set_height(std::min(child_height, child_area.height())); |
| 35 gfx::Point origin((child_area.width() - size.width()) / 2, |
| 36 (child_area.height() - size.height()) / 2); |
| 37 child->SetBoundsRect(gfx::Rect(origin, size)); |
| 38 } |
| 39 |
| 40 gfx::Size CenterLayout::GetPreferredSize(View* host) { |
| 41 if (!host->has_children()) |
| 42 return gfx::Size(); |
| 43 |
| 44 DCHECK_EQ(1, host->child_count()); |
| 45 return host->child_at(0)->GetPreferredSize(); |
| 46 } |
| 47 |
| 48 int CenterLayout::GetPreferredHeightForWidth(View* host, int width) { |
| 49 if (!host->has_children()) |
| 50 LayoutManager::GetPreferredHeightForWidth(host, width); |
| 51 |
| 52 DCHECK_EQ(1, host->child_count()); |
| 53 return host->child_at(0)->GetHeightForWidth(width); |
| 54 } |
| 55 |
| 56 } // namespace views |
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