chrome/browser/ui/views/panels/panel_stack_view.h

   1 // Copyright (c) 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 #ifndef CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_
   7
   8 #include <list>
   9 #include <map>
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/browser/ui/panels/native_panel_stack_window.h"
  13 #include "ui/gfx/animation/animation_delegate.h"
  14 #include "ui/views/focus/widget_focus_manager.h"
  15 #include "ui/views/widget/widget_delegate.h"
  16 #include "ui/views/widget/widget_observer.h"
  17
  18 #if defined(OS_WIN)
  19 #include "chrome/browser/ui/views/panels/taskbar_window_thumbnailer_win.h"
  20 #include "ui/base/win/hwnd_subclass.h"
  21 #endif
  22
  23 namespace gfx {
  24 class LinearAnimation;
  25 }
  26 namespace views {
  27 class Widget;
  28 }
  29
  30 // A native window that acts as the owner of all panels in the stack, in order
  31 // to make all panels appear as a single window on the taskbar or launcher.
  32 class PanelStackView : public NativePanelStackWindow,
  33                        public views::WidgetFocusChangeListener,
  34 #if defined(OS_WIN)
  35                        public ui::HWNDMessageFilter,
  36                        public TaskbarWindowThumbnailerDelegateWin,
  37 #endif
  38                        public gfx::AnimationDelegate {
  39  public:
  40   explicit PanelStackView(NativePanelStackWindowDelegate* delegate);
  41   ~PanelStackView() override;
  42
  43  protected:
  44   // Overridden from NativePanelStackWindow:
  45   void Close() override;
  46   void AddPanel(Panel* panel) override;
  47   void RemovePanel(Panel* panel) override;
  48   void MergeWith(NativePanelStackWindow* another) override;
  49   bool IsEmpty() const override;
  50   bool HasPanel(Panel* panel) const override;
  51   void MovePanelsBy(const gfx::Vector2d& delta) override;
  52   void BeginBatchUpdatePanelBounds(bool animate) override;
  53   void AddPanelBoundsForBatchUpdate(Panel* panel,
  54                                     const gfx::Rect& new_bounds) override;
  55   void EndBatchUpdatePanelBounds() override;
  56   bool IsAnimatingPanelBounds() const override;
  57   void Minimize() override;
  58   bool IsMinimized() const override;
  59   void DrawSystemAttention(bool draw_attention) override;
  60   void OnPanelActivated(Panel* panel) override;
  61
  62  private:
  63   typedef std::list<Panel*> Panels;
  64
  65   // The map value is old bounds of the panel.
  66   typedef std::map<Panel*, gfx::Rect> BoundsUpdates;
  67
  68   // Overridden from views::WidgetFocusChangeListener:
  69   void OnNativeFocusChanged(gfx::NativeView focused_now) override;
  70
  71   // Overridden from AnimationDelegate:
  72   void AnimationEnded(const gfx::Animation* animation) override;
  73   void AnimationProgressed(const gfx::Animation* animation) override;
  74   void AnimationCanceled(const gfx::Animation* animation) override;
  75
  76   // Updates the bounds of panels as specified in batch update data.
  77   void UpdatePanelsBounds();
  78
  79   // Notifies the delegate that the updates of the panel bounds are completed.
  80   void NotifyBoundsUpdateCompleted();
  81
  82   // Computes/updates the minimum bounds that could fit all panels.
  83   gfx::Rect GetStackWindowBounds() const;
  84   void UpdateStackWindowBounds();
  85
  86   views::Widget* CreateWindowWithBounds(const gfx::Rect& bounds);
  87   void EnsureWindowCreated();
  88
  89   // Makes the stack window own the panel window such that multiple panels
  90   // stacked together could appear as a single window on the taskbar or
  91   // launcher.
  92   static void MakeStackWindowOwnPanelWindow(Panel* panel,
  93                                             PanelStackView* stack_window);
  94
  95 #if defined(OS_WIN)
  96   // Overridden from ui::HWNDMessageFilter:
  97   bool FilterMessage(HWND hwnd,
  98                      UINT message,
  99                      WPARAM w_param,
 100                      LPARAM l_param,
 101                      LRESULT* l_result) override;
 102
 103   // Overridden from TaskbarWindowThumbnailerDelegateWin:
 104   std::vector<HWND> GetSnapshotWindowHandles() const override;
 105
 106   // Updates the live preview snapshot when something changes, like
 107   // adding/removing/moving/resizing a stacked panel.
 108   void RefreshLivePreviewThumbnail();
 109
 110   // Updates the bounds of the widget window in a deferred way.
 111   void DeferUpdateNativeWindowBounds(HDWP defer_window_pos_info,
 112                                      views::Widget* window,
 113                                      const gfx::Rect& bounds);
 114 #endif
 115
 116   NativePanelStackWindowDelegate* delegate_;
 117
 118   views::Widget* window_;  // Weak pointer, own us.
 119
 120   // Tracks all panels that are enclosed by this window.
 121   Panels panels_;
 122
 123   // Is the taskbar icon of the underlying window being flashed in order to
 124   // draw the user's attention?
 125   bool is_drawing_attention_;
 126
 127 #if defined(OS_WIN)
 128   // The custom live preview snapshot is always provided for the stack window.
 129   // This is because the system might not show the snapshot correctly for
 130   // a small window, like collapsed panel.
 131   scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;
 132 #endif
 133
 134   // For batch bounds update.
 135   bool animate_bounds_updates_;
 136   bool bounds_updates_started_;
 137   BoundsUpdates bounds_updates_;
 138
 139   // Used to animate the bounds changes at a synchronized pace.
 140   scoped_ptr<gfx::LinearAnimation> bounds_animator_;
 141
 142   DISALLOW_COPY_AND_ASSIGN(PanelStackView);
 143 };
 144
 145 #endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_