src/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 OnNativeFocusChange(gfx::NativeView focused_before,
  70                            gfx::NativeView focused_now) override;
  71
  72   // Overridden from AnimationDelegate:
  73   void AnimationEnded(const gfx::Animation* animation) override;
  74   void AnimationProgressed(const gfx::Animation* animation) override;
  75   void AnimationCanceled(const gfx::Animation* animation) override;
  76
  77   // Updates the bounds of panels as specified in batch update data.
  78   void UpdatePanelsBounds();
  79
  80   // Notifies the delegate that the updates of the panel bounds are completed.
  81   void NotifyBoundsUpdateCompleted();
  82
  83   // Computes/updates the minimum bounds that could fit all panels.
  84   gfx::Rect GetStackWindowBounds() const;
  85   void UpdateStackWindowBounds();
  86
  87   views::Widget* CreateWindowWithBounds(const gfx::Rect& bounds);
  88   void EnsureWindowCreated();
  89
  90   // Makes the stack window own the panel window such that multiple panels
  91   // stacked together could appear as a single window on the taskbar or
  92   // launcher.
  93   static void MakeStackWindowOwnPanelWindow(Panel* panel,
  94                                             PanelStackView* stack_window);
  95
  96 #if defined(OS_WIN)
  97   // Overridden from ui::HWNDMessageFilter:
  98   virtual bool FilterMessage(HWND hwnd,
  99                              UINT message,
 100                              WPARAM w_param,
 101                              LPARAM l_param,
 102                              LRESULT* l_result) override;
 103
 104   // Overridden from TaskbarWindowThumbnailerDelegateWin:
 105   virtual std::vector<HWND> GetSnapshotWindowHandles() const override;
 106
 107   // Updates the live preview snapshot when something changes, like
 108   // adding/removing/moving/resizing a stacked panel.
 109   void RefreshLivePreviewThumbnail();
 110
 111   // Updates the bounds of the widget window in a deferred way.
 112   void DeferUpdateNativeWindowBounds(HDWP defer_window_pos_info,
 113                                      views::Widget* window,
 114                                      const gfx::Rect& bounds);
 115 #endif
 116
 117   NativePanelStackWindowDelegate* delegate_;
 118
 119   views::Widget* window_;  // Weak pointer, own us.
 120
 121   // Tracks all panels that are enclosed by this window.
 122   Panels panels_;
 123
 124   // Is the taskbar icon of the underlying window being flashed in order to
 125   // draw the user's attention?
 126   bool is_drawing_attention_;
 127
 128 #if defined(OS_WIN)
 129   // The custom live preview snapshot is always provided for the stack window.
 130   // This is because the system might not show the snapshot correctly for
 131   // a small window, like collapsed panel.
 132   scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;
 133 #endif
 134
 135   // For batch bounds update.
 136   bool animate_bounds_updates_;
 137   bool bounds_updates_started_;
 138   BoundsUpdates bounds_updates_;
 139
 140   // Used to animate the bounds changes at a synchronized pace.
 141   scoped_ptr<gfx::LinearAnimation> bounds_animator_;
 142
 143   DISALLOW_COPY_AND_ASSIGN(PanelStackView);
 144 };
 145
 146 #endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_