ash/wm/status_area_layout_manager.cc

   1 // Copyright (c) 2012 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 "ash/wm/status_area_layout_manager.h"
   6
   7 #include "ash/shelf/shelf_layout_manager.h"
   8 #include "ash/shelf/shelf_widget.h"
   9 #include "ash/system/status_area_widget.h"
  10 #include "base/auto_reset.h"
  11 #include "ui/aura/window.h"
  12 #include "ui/views/widget/widget.h"
  13
  14 namespace ash {
  15
  16 ////////////////////////////////////////////////////////////////////////////////
  17 // StatusAreaLayoutManager, public:
  18
  19 StatusAreaLayoutManager::StatusAreaLayoutManager(aura::Window* container,
  20                                                  ShelfWidget* shelf)
  21     : SnapToPixelLayoutManager(container), in_layout_(false), shelf_(shelf) {
  22 }
  23
  24 StatusAreaLayoutManager::~StatusAreaLayoutManager() {
  25 }
  26
  27 ////////////////////////////////////////////////////////////////////////////////
  28 // StatusAreaLayoutManager, aura::LayoutManager implementation:
  29
  30 void StatusAreaLayoutManager::OnWindowResized() {
  31   LayoutStatusArea();
  32 }
  33
  34 void StatusAreaLayoutManager::SetChildBounds(
  35     aura::Window* child,
  36     const gfx::Rect& requested_bounds) {
  37   // Only need to have the shelf do a layout if the child changing is the status
  38   // area and the shelf isn't in the process of doing a layout.
  39   if (child != shelf_->status_area_widget()->GetNativeView() || in_layout_) {
  40     SnapToPixelLayoutManager::SetChildBounds(child, requested_bounds);
  41     return;
  42   }
  43
  44   // If the bounds match, no need to do anything. Check for target bounds to
  45   // ensure any active animation is retargeted.
  46   if (requested_bounds == child->GetTargetBounds())
  47     return;
  48
  49   SnapToPixelLayoutManager::SetChildBounds(child, requested_bounds);
  50   LayoutStatusArea();
  51 }
  52
  53 ////////////////////////////////////////////////////////////////////////////////
  54 // StatusAreaLayoutManager, private:
  55
  56 void StatusAreaLayoutManager::LayoutStatusArea() {
  57   // Shelf layout manager may be already doing layout.
  58   if (shelf_->shelf_layout_manager()->updating_bounds())
  59     return;
  60
  61   base::AutoReset<bool> auto_reset_in_layout(&in_layout_, true);
  62   shelf_->shelf_layout_manager()->LayoutShelf();
  63 }
  64
  65 }  // namespace ash