| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/views/layout/box_layout.h" |
| |
| #include "ui/gfx/insets.h" |
| #include "ui/gfx/rect.h" |
| #include "ui/views/view.h" |
| |
| namespace views { |
| |
| BoxLayout::BoxLayout(BoxLayout::Orientation orientation, |
| int inside_border_horizontal_spacing, |
| int inside_border_vertical_spacing, |
| int between_child_spacing) |
| : orientation_(orientation), |
| inside_border_horizontal_spacing_(inside_border_horizontal_spacing), |
| inside_border_vertical_spacing_(inside_border_vertical_spacing), |
| between_child_spacing_(between_child_spacing), |
| spread_blank_space_(false) { |
| } |
| |
| BoxLayout::~BoxLayout() { |
| } |
| |
| void BoxLayout::Layout(View* host) { |
| gfx::Rect child_area(host->GetLocalBounds()); |
| child_area.Inset(host->GetInsets()); |
| child_area.Inset(inside_border_horizontal_spacing_, |
| inside_border_vertical_spacing_); |
| int x = child_area.x(); |
| int y = child_area.y(); |
| |
| int padding = 0; |
| if (spread_blank_space_) { |
| int total = 0; |
| int visible = 0; |
| for (int i = 0; i < host->child_count(); ++i) { |
| View* child = host->child_at(i); |
| if (!child->visible()) |
| continue; |
| if (orientation_ == kHorizontal) |
| total += child->GetPreferredSize().width() + between_child_spacing_; |
| else |
| total += child->GetPreferredSize().height() + between_child_spacing_; |
| ++visible; |
| } |
| |
| if (visible) { |
| total -= between_child_spacing_; |
| if (orientation_ == kHorizontal) |
| padding = (child_area.width() - total) / visible; |
| else |
| padding = (child_area.height() - total) / visible; |
| |
| if (padding < 0) |
| padding = 0; |
| } |
| } |
| |
| for (int i = 0; i < host->child_count(); ++i) { |
| View* child = host->child_at(i); |
| if (child->visible()) { |
| gfx::Rect bounds(x, y, child_area.width(), child_area.height()); |
| gfx::Size size(child->GetPreferredSize()); |
| if (orientation_ == kHorizontal) { |
| bounds.set_width(size.width() + padding); |
| x += size.width() + between_child_spacing_ + padding; |
| } else { |
| bounds.set_height(size.height() + padding); |
| y += size.height() + between_child_spacing_ + padding; |
| } |
| // Clamp child view bounds to |child_area|. |
| child->SetBoundsRect(bounds.Intersect(child_area)); |
| } |
| } |
| } |
| |
| gfx::Size BoxLayout::GetPreferredSize(View* host) { |
| gfx::Rect bounds; |
| int position = 0; |
| for (int i = 0; i < host->child_count(); ++i) { |
| View* child = host->child_at(i); |
| if (child->visible()) { |
| gfx::Size size(child->GetPreferredSize()); |
| if (orientation_ == kHorizontal) { |
| gfx::Rect child_bounds(position, 0, size.width(), size.height()); |
| bounds = bounds.Union(child_bounds); |
| position += size.width(); |
| } else { |
| gfx::Rect child_bounds(0, position, size.width(), size.height()); |
| bounds = bounds.Union(child_bounds); |
| position += size.height(); |
| } |
| position += between_child_spacing_; |
| } |
| } |
| gfx::Insets insets(host->GetInsets()); |
| return gfx::Size( |
| bounds.width() + insets.width() + 2 * inside_border_horizontal_spacing_, |
| bounds.height() + insets.height() + 2 * inside_border_vertical_spacing_); |
| } |
| |
| } // namespace views |