panel_stack_view.h revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
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/base/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
23namespace ui {
24class LinearAnimation;
25}
26namespace views {
27class 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.
32class PanelStackView : public NativePanelStackWindow,
33                       public views::WidgetObserver,
34                       public views::WidgetDelegateView,
35                       public views::WidgetFocusChangeListener,
36#if defined(OS_WIN)
37                       public ui::HWNDMessageFilter,
38                       public TaskbarWindowThumbnailerDelegateWin,
39#endif
40                       public ui::AnimationDelegate {
41 public:
42  explicit PanelStackView(NativePanelStackWindowDelegate* delegate);
43  virtual ~PanelStackView();
44
45 protected:
46  // Overridden from NativePanelStackWindow:
47  virtual void Close() OVERRIDE;
48  virtual void AddPanel(Panel* panel) OVERRIDE;
49  virtual void RemovePanel(Panel* panel) OVERRIDE;
50  virtual void MergeWith(NativePanelStackWindow* another) OVERRIDE;
51  virtual bool IsEmpty() const OVERRIDE;
52  virtual bool HasPanel(Panel* panel) const OVERRIDE;
53  virtual void MovePanelsBy(const gfx::Vector2d& delta) OVERRIDE;
54  virtual void BeginBatchUpdatePanelBounds(bool animate) OVERRIDE;
55  virtual void AddPanelBoundsForBatchUpdate(
56      Panel* panel, const gfx::Rect& new_bounds) OVERRIDE;
57  virtual void EndBatchUpdatePanelBounds() OVERRIDE;
58  virtual bool IsAnimatingPanelBounds() const OVERRIDE;
59  virtual void Minimize() OVERRIDE;
60  virtual bool IsMinimized() const OVERRIDE;
61  virtual void DrawSystemAttention(bool draw_attention) OVERRIDE;
62  virtual void OnPanelActivated(Panel* panel) OVERRIDE;
63
64 private:
65  typedef std::list<Panel*> Panels;
66
67  // The map value is old bounds of the panel.
68  typedef std::map<Panel*, gfx::Rect> BoundsUpdates;
69
70  // Overridden from views::WidgetDelegate:
71  virtual string16 GetWindowTitle() const OVERRIDE;
72  virtual gfx::ImageSkia GetWindowAppIcon() OVERRIDE;
73  virtual gfx::ImageSkia GetWindowIcon() OVERRIDE;
74  virtual views::Widget* GetWidget() OVERRIDE;
75  virtual const views::Widget* GetWidget() const OVERRIDE;
76  virtual void DeleteDelegate() OVERRIDE;
77
78  // Overridden from views::WidgetObserver:
79  virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
80
81  // Overridden from views::WidgetFocusChangeListener:
82  virtual void OnNativeFocusChange(gfx::NativeView focused_before,
83                                   gfx::NativeView focused_now) OVERRIDE;
84
85  // Overridden from AnimationDelegate:
86  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
87  virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
88
89  // Updates the bounds of panels as specified in batch update data.
90  void UpdatePanelsBounds();
91
92  // Notifies the delegate that the updates of the panel bounds are completed.
93  void NotifyBoundsUpdateCompleted();
94
95  // Computes/updates the minimum bounds that could fit all panels.
96  gfx::Rect GetStackWindowBounds() const;
97  void UpdateStackWindowBounds();
98
99  views::Widget* CreateWindowWithBounds(const gfx::Rect& bounds);
100  void EnsureWindowCreated();
101
102  // Makes the stack window own the panel window such that multiple panels
103  // stacked together could appear as a single window on the taskbar or
104  // launcher.
105  static void MakeStackWindowOwnPanelWindow(Panel* panel,
106                                            PanelStackView* stack_window);
107
108#if defined(OS_WIN)
109  // Overridden from ui::HWNDMessageFilter:
110  virtual bool FilterMessage(HWND hwnd,
111                             UINT message,
112                             WPARAM w_param,
113                             LPARAM l_param,
114                             LRESULT* l_result) OVERRIDE;
115
116  // Overridden from TaskbarWindowThumbnailerDelegateWin:
117  virtual std::vector<HWND> GetSnapshotWindowHandles() const OVERRIDE;
118
119  // Updates the live preview snapshot when something changes, like
120  // adding/removing/moving/resizing a stacked panel.
121  void RefreshLivePreviewThumbnail();
122
123  // Updates the bounds of the widget window in a deferred way.
124  void DeferUpdateNativeWindowBounds(HDWP defer_window_pos_info,
125                                     views::Widget* window,
126                                     const gfx::Rect& bounds);
127#endif
128
129  NativePanelStackWindowDelegate* delegate_;
130
131  views::Widget* window_;  // Weak pointer, own us.
132
133  bool is_closing_;
134
135  // Tracks all panels that are enclosed by this window.
136  Panels panels_;
137
138  // Is the taskbar icon of the underlying window being flashed in order to
139  // draw the user's attention?
140  bool is_drawing_attention_;
141
142#if defined(OS_WIN)
143  // The custom live preview snapshot is always provided for the stack window.
144  // This is because the system might not show the snapshot correctly for
145  // a small window, like collapsed panel.
146  scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;
147#endif
148
149  // For batch bounds update.
150  bool animate_bounds_updates_;
151  bool bounds_updates_started_;
152  BoundsUpdates bounds_updates_;
153
154  // Used to animate the bounds changes at a synchronized pace.
155  scoped_ptr<ui::LinearAnimation> bounds_animator_;
156
157  DISALLOW_COPY_AND_ASSIGN(PanelStackView);
158};
159
160#endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_STACK_VIEW_H_
161