src/ash/wm/overview/window_selector_panels.cc

   1 // Copyright 2013 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/overview/window_selector_panels.h"
   6
   7 #include "ash/screen_util.h"
   8 #include "ash/shell.h"
   9 #include "ash/shell_window_ids.h"
  10 #include "ash/wm/overview/scoped_transform_overview_window.h"
  11 #include "ash/wm/overview/transparent_activate_window_button.h"
  12 #include "ash/wm/panels/panel_layout_manager.h"
  13 #include "ash/wm/window_util.h"
  14 #include "ui/aura/window.h"
  15 #include "ui/compositor/layer.h"
  16 #include "ui/compositor/layer_animation_observer.h"
  17 #include "ui/compositor/layer_animation_sequence.h"
  18 #include "ui/views/controls/button/button.h"
  19
  20 namespace ash {
  21
  22 namespace {
  23
  24 // This class extends ScopedTransformOverviewMode to hide and show the callout
  25 // widget for a panel window when entering / leaving overview mode, as well as
  26 // to add a transparent button for each panel window.
  27 class ScopedTransformPanelWindow : public ScopedTransformOverviewWindow {
  28  public:
  29   explicit ScopedTransformPanelWindow(aura::Window* window);
  30   ~ScopedTransformPanelWindow() override;
  31
  32   // ScopedTransformOverviewWindow overrides:
  33   void PrepareForOverview() override;
  34
  35   void SetTransform(aura::Window* root_window,
  36                     const gfx::Transform& transform,
  37                     bool animate) override;
  38
  39  private:
  40   // Returns the panel window bounds after the transformation.
  41   gfx::Rect GetTransformedBounds();
  42
  43   scoped_ptr<TransparentActivateWindowButton> window_button_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(ScopedTransformPanelWindow);
  46 };
  47
  48 ScopedTransformPanelWindow::ScopedTransformPanelWindow(aura::Window* window)
  49     : ScopedTransformOverviewWindow(window) {
  50 }
  51
  52 ScopedTransformPanelWindow::~ScopedTransformPanelWindow() {
  53 }
  54
  55 void ScopedTransformPanelWindow::PrepareForOverview() {
  56   ScopedTransformOverviewWindow::PrepareForOverview();
  57   window_button_.reset(new TransparentActivateWindowButton(window()));
  58 }
  59
  60 void ScopedTransformPanelWindow::SetTransform(
  61     aura::Window* root_window,
  62     const gfx::Transform& transform,
  63     bool animate) {
  64   ScopedTransformOverviewWindow::SetTransform(root_window, transform, animate);
  65   window_button_->SetBounds(GetTransformedBounds());
  66 }
  67
  68 gfx::Rect ScopedTransformPanelWindow::GetTransformedBounds() {
  69   gfx::RectF bounds(ScreenUtil::ConvertRectToScreen(
  70           window()->GetRootWindow(), window()->layer()->bounds()));
  71   gfx::Transform new_transform;
  72   new_transform.Translate(bounds.x(),
  73                           bounds.y());
  74   new_transform.PreconcatTransform(window()->layer()->GetTargetTransform());
  75   new_transform.Translate(-bounds.x(),
  76                           -bounds.y());
  77   new_transform.TransformRect(&bounds);
  78   return ToEnclosingRect(bounds);
  79 }
  80
  81 }  // namespace
  82
  83 WindowSelectorPanels::WindowSelectorPanels(aura::Window* panels_root_window)
  84     : panels_root_window_(panels_root_window) {
  85   static_cast<PanelLayoutManager*>(
  86       Shell::GetContainer(panels_root_window_, kShellWindowId_PanelContainer)->
  87           layout_manager())->SetShowCalloutWidgets(false);
  88 }
  89
  90 WindowSelectorPanels::~WindowSelectorPanels() {
  91   static_cast<PanelLayoutManager*>(
  92       Shell::GetContainer(panels_root_window_, kShellWindowId_PanelContainer)->
  93           layout_manager())->SetShowCalloutWidgets(true);
  94   for (WindowList::iterator iter = transform_windows_.begin();
  95       iter != transform_windows_.end(); iter++) {
  96     (*iter)->window()->RemoveObserver(this);
  97   }
  98 }
  99
 100 void WindowSelectorPanels::AddWindow(aura::Window* window) {
 101   DCHECK(window->GetRootWindow() == panels_root_window_);
 102   window->AddObserver(this);
 103   transform_windows_.push_back(new ScopedTransformPanelWindow(window));
 104 }
 105
 106 aura::Window* WindowSelectorPanels::GetRootWindow() {
 107   return transform_windows_.front()->window()->GetRootWindow();
 108 }
 109
 110 bool WindowSelectorPanels::HasSelectableWindow(const aura::Window* window) {
 111   for (WindowList::const_iterator iter = transform_windows_.begin();
 112        iter != transform_windows_.end(); ++iter) {
 113     if ((*iter)->window() == window)
 114       return true;
 115   }
 116   return false;
 117 }
 118
 119 bool WindowSelectorPanels::Contains(const aura::Window* target) {
 120   for (WindowList::const_iterator iter = transform_windows_.begin();
 121        iter != transform_windows_.end(); ++iter) {
 122     if ((*iter)->Contains(target))
 123       return true;
 124   }
 125   return false;
 126 }
 127
 128 void WindowSelectorPanels::RestoreWindowOnExit(aura::Window* window) {
 129   for (WindowList::iterator iter = transform_windows_.begin();
 130        iter != transform_windows_.end(); ++iter) {
 131     if ((*iter)->Contains(window)) {
 132       (*iter)->RestoreWindowOnExit();
 133       break;
 134     }
 135   }
 136 }
 137
 138 aura::Window* WindowSelectorPanels::SelectionWindow() {
 139   return transform_windows_.front()->window();
 140 }
 141
 142 void WindowSelectorPanels::RemoveWindow(const aura::Window* window) {
 143   for (WindowList::iterator iter = transform_windows_.begin();
 144        iter != transform_windows_.end(); ++iter) {
 145     if ((*iter)->window() == window) {
 146       (*iter)->window()->RemoveObserver(this);
 147       (*iter)->OnWindowDestroyed();
 148       transform_windows_.erase(iter);
 149       break;
 150     }
 151   }
 152   WindowSelectorItem::RemoveWindow(window);
 153 }
 154
 155 bool WindowSelectorPanels::empty() const {
 156   return transform_windows_.empty();
 157 }
 158
 159 void WindowSelectorPanels::PrepareForOverview() {
 160   // |panel_windows| will hold all the windows in the panel container, sorted
 161   // according to their stacking order.
 162   const aura::Window::Windows panels =
 163       transform_windows_.front()->window()->parent()->children();
 164
 165   // Call PrepareForOverview() in the reverse stacking order so that the
 166   // transparent windows that handle the events are in the correct stacking
 167   // order.
 168   size_t transformed_windows = 0;
 169   for (aura::Window::Windows::const_reverse_iterator iter = panels.rbegin();
 170       iter != panels.rend(); iter++) {
 171     for (size_t j = 0; j < transform_windows_.size(); ++j) {
 172       if (transform_windows_[j]->window() == (*iter)) {
 173         transform_windows_[j]->PrepareForOverview();
 174         transformed_windows++;
 175       }
 176     }
 177   }
 178   DCHECK(transformed_windows == transform_windows_.size());
 179 }
 180
 181 void WindowSelectorPanels::SetItemBounds(aura::Window* root_window,
 182                                          const gfx::Rect& target_bounds,
 183                                          bool animate) {
 184   gfx::Rect bounding_rect;
 185   for (WindowList::iterator iter = transform_windows_.begin();
 186        iter != transform_windows_.end(); ++iter) {
 187     bounding_rect.Union((*iter)->GetBoundsInScreen());
 188   }
 189   set_bounds(ScopedTransformOverviewWindow::
 190       ShrinkRectToFitPreservingAspectRatio(bounding_rect, target_bounds));
 191   gfx::Transform bounding_transform =
 192       ScopedTransformOverviewWindow::GetTransformForRect(bounding_rect,
 193                                                          bounds());
 194   for (WindowList::iterator iter = transform_windows_.begin();
 195        iter != transform_windows_.end(); ++iter) {
 196     gfx::Transform transform;
 197     gfx::Rect bounds = (*iter)->GetBoundsInScreen();
 198     transform.Translate(bounding_rect.x() - bounds.x(),
 199                         bounding_rect.y() - bounds.y());
 200     transform.PreconcatTransform(bounding_transform);
 201     transform.Translate(bounds.x() - bounding_rect.x(),
 202                         bounds.y() - bounding_rect.y());
 203     (*iter)->SetTransform(root_window, transform, animate);
 204   }
 205 }
 206
 207 void WindowSelectorPanels::SetOpacity(float opacity) {
 208   // TODO(flackr): find a way to make panels that are hidden behind other panels
 209   // look nice.
 210   for (WindowList::iterator iter = transform_windows_.begin();
 211        iter != transform_windows_.end(); iter++) {
 212     (*iter)->window()->layer()->SetOpacity(opacity);
 213   }
 214   WindowSelectorItem::SetOpacity(opacity);
 215 }
 216
 217 }  // namespace ash