panel_view.h revision 3551c9c881056c480085172ff9840cab31610854 
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#ifndef CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_VIEW_H_
6#define CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_VIEW_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "chrome/browser/ui/panels/native_panel.h"
10#include "ui/base/animation/animation_delegate.h"
11#include "ui/views/widget/widget_delegate.h"
12#include "ui/views/widget/widget_observer.h"
13
14#if defined(OS_WIN)
15#include "ui/base/win/hwnd_subclass.h"
16#endif
17
18class Panel;
19class PanelBoundsAnimation;
20class PanelFrameView;
21class TaskbarWindowThumbnailerWin;
22
23namespace views {
24class WebView;
25}
26
27class PanelView : public NativePanel,
28                  public views::WidgetObserver,
29                  public views::WidgetDelegateView,
30#if defined(OS_WIN)
31                  public ui::HWNDMessageFilter,
32#endif
33                  public ui::AnimationDelegate {
34 public:
35  // The size of inside area used for mouse resizing.
36  static const int kResizeInsideBoundsSize = 5;
37
38  PanelView(Panel* panel, const gfx::Rect& bounds, bool always_on_top);
39  virtual ~PanelView();
40
41  // Overridden from NativePanel:
42  virtual void ShowPanel() OVERRIDE;
43  virtual void ShowPanelInactive() OVERRIDE;
44  virtual gfx::Rect GetPanelBounds() const OVERRIDE;
45  virtual void SetPanelBounds(const gfx::Rect& bounds) OVERRIDE;
46  virtual void SetPanelBoundsInstantly(const gfx::Rect& bounds) OVERRIDE;
47  virtual void ClosePanel() OVERRIDE;
48  virtual void ActivatePanel() OVERRIDE;
49  virtual void DeactivatePanel() OVERRIDE;
50  virtual bool IsPanelActive() const OVERRIDE;
51  virtual void PreventActivationByOS(bool prevent_activation) OVERRIDE;
52  virtual gfx::NativeWindow GetNativePanelWindow() OVERRIDE;
53  virtual void UpdatePanelTitleBar() OVERRIDE;
54  virtual void UpdatePanelLoadingAnimations(bool should_animate) OVERRIDE;
55  virtual void PanelWebContentsFocused(content::WebContents* contents) OVERRIDE;
56  virtual void PanelCut() OVERRIDE;
57  virtual void PanelCopy() OVERRIDE;
58  virtual void PanelPaste() OVERRIDE;
59  virtual void DrawAttention(bool draw_attention) OVERRIDE;
60  virtual bool IsDrawingAttention() const OVERRIDE;
61  virtual void HandlePanelKeyboardEvent(
62      const content::NativeWebKeyboardEvent& event) OVERRIDE;
63  virtual void FullScreenModeChanged(bool is_full_screen) OVERRIDE;
64  virtual bool IsPanelAlwaysOnTop() const OVERRIDE;
65  virtual void SetPanelAlwaysOnTop(bool on_top) OVERRIDE;
66  virtual void EnableResizeByMouse(bool enable) OVERRIDE;
67  virtual void UpdatePanelMinimizeRestoreButtonVisibility() OVERRIDE;
68  virtual void SetWindowCornerStyle(panel::CornerStyle corner_style) OVERRIDE;
69  virtual void PanelExpansionStateChanging(
70      Panel::ExpansionState old_state,
71      Panel::ExpansionState new_state) OVERRIDE;
72  virtual void AttachWebContents(content::WebContents* contents) OVERRIDE;
73  virtual void DetachWebContents(content::WebContents* contents) OVERRIDE;
74  virtual gfx::Size WindowSizeFromContentSize(
75      const gfx::Size& content_size) const OVERRIDE;
76  virtual gfx::Size ContentSizeFromWindowSize(
77      const gfx::Size& window_size) const OVERRIDE;
78  virtual int TitleOnlyHeight() const OVERRIDE;
79  virtual void MinimizePanelBySystem() OVERRIDE;
80  virtual bool IsPanelMinimizedBySystem() const OVERRIDE;
81  virtual bool IsPanelShownOnActiveDesktop() const OVERRIDE;
82  virtual void ShowShadow(bool show) OVERRIDE;
83  virtual NativePanelTesting* CreateNativePanelTesting() OVERRIDE;
84
85  // Overridden from views::View:
86  virtual gfx::Size GetMinimumSize() OVERRIDE;
87  virtual gfx::Size GetMaximumSize() OVERRIDE;
88
89  // Return true if the mouse event is handled.
90  // |mouse_location| is in screen coordinate system.
91  bool OnTitlebarMousePressed(const gfx::Point& mouse_location);
92  bool OnTitlebarMouseDragged(const gfx::Point& mouse_location);
93  bool OnTitlebarMouseReleased(panel::ClickModifier modifier);
94  bool OnTitlebarMouseCaptureLost();
95
96  PanelFrameView* GetFrameView() const;
97  bool IsAnimatingBounds() const;
98
99  // The panel does not show a resizing border. Instead, the inner content area
100  // can be used to trigger the mouse resizing. Return true if |mouse_location|
101  // falls within this area.
102  // |mouse_location| is in screen coordinate system.
103  bool IsWithinResizingArea(const gfx::Point& mouse_location) const;
104
105  Panel* panel() const { return panel_.get(); }
106  views::Widget* window() const { return window_; }
107  bool force_to_paint_as_inactive() const {
108    return force_to_paint_as_inactive_;
109  }
110
111  // PanelStackView might want to update the stored bounds directly since it
112  // has already taken care of updating the window bounds directly.
113  void set_cached_bounds_directly(const gfx::Rect& bounds) { bounds_ = bounds; }
114
115 private:
116  enum MouseDraggingState {
117    NO_DRAGGING,
118    DRAGGING_STARTED,
119    DRAGGING_ENDED
120  };
121
122  // Overridden from views::WidgetDelegate:
123  virtual void OnDisplayChanged() OVERRIDE;
124  virtual void OnWorkAreaChanged() OVERRIDE;
125  virtual bool WillProcessWorkAreaChange() const OVERRIDE;
126  virtual views::View* GetContentsView() OVERRIDE;
127  virtual views::NonClientFrameView* CreateNonClientFrameView(
128      views::Widget* widget) OVERRIDE;
129  virtual bool CanResize() const OVERRIDE;
130  virtual bool CanMaximize() const OVERRIDE;
131  virtual views::Widget* GetWidget() OVERRIDE;
132  virtual const views::Widget* GetWidget() const OVERRIDE;
133  virtual string16 GetWindowTitle() const OVERRIDE;
134  virtual gfx::ImageSkia GetWindowAppIcon() OVERRIDE;
135  virtual gfx::ImageSkia GetWindowIcon() OVERRIDE;
136  virtual void WindowClosing() OVERRIDE;
137  virtual void DeleteDelegate() OVERRIDE;
138  virtual void OnWindowBeginUserBoundsChange() OVERRIDE;
139  virtual void OnWindowEndUserBoundsChange() OVERRIDE;
140
141  // Overridden from views::View:
142  virtual void Layout() OVERRIDE;
143  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
144
145  // Overridden from views::WidgetObserver:
146  virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
147  virtual void OnWidgetActivationChanged(views::Widget* widget,
148                                         bool active) OVERRIDE;
149  virtual void OnWidgetBoundsChanged(views::Widget* widget,
150                                     const gfx::Rect& new_bounds) OVERRIDE;
151
152  // Overridden from ui::HWNDMessageFilter:
153#if defined(OS_WIN)
154  virtual bool FilterMessage(HWND hwnd,
155                             UINT message,
156                             WPARAM w_param,
157                             LPARAM l_param,
158                             LRESULT* l_result) OVERRIDE;
159#endif
160
161  // Overridden from AnimationDelegate:
162  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
163  virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
164
165  void UpdateLoadingAnimations(bool should_animate);
166  void UpdateWindowTitle();
167  void UpdateWindowIcon();
168  void SetBoundsInternal(const gfx::Rect& bounds, bool animate);
169  bool EndDragging(bool cancelled);
170  void OnViewWasResized();
171
172  // Sets the bounds of the underlying window to |new_bounds|. Note that this
173  // might update the window style to work around the minimum overlapped
174  // window height limitation.
175  void SetWidgetBounds(const gfx::Rect& new_bounds);
176
177#if defined(OS_WIN)
178  // Sets |attribute_value_to_set| and/or clears |attribute_value_to_reset| for
179  // the attibute denoted by |attribute_index|. This is used to update the style
180  // or extended style for the native window.
181  void UpdateWindowAttribute(int attribute_index,
182                             int attribute_value_to_set,
183                             int attribute_value_to_reset,
184                             bool update_frame);
185#endif
186
187  scoped_ptr<Panel> panel_;
188  gfx::Rect bounds_;
189
190  // The window that holds all panel views. Lifetime managed by native widget.
191  // See widget.h.
192  views::Widget* window_;
193
194  // Close gets called more than once, so use this to do one-time clean up once.
195  bool window_closed_;
196
197  // The view hosting the web contents. Will be destroyed when child views
198  // of this class are destroyed.
199  views::WebView* web_view_;
200
201  // True if the panel should always stay on top of other windows.
202  bool always_on_top_;
203
204  // Is the panel receiving the focus?
205  bool focused_;
206
207  // True if the user is resizing the panel.
208  bool user_resizing_;
209
210#if defined(OS_WIN)
211  // True if the user is resizing the interior edge of a stack.
212  bool user_resizing_interior_stacked_panel_edge_;
213
214  // The original full size of the resizing panel before the resizing states.
215  gfx::Size original_full_size_of_resizing_panel_;
216
217  // The original full size of the panel below the resizing panel before the
218  // resizing starts.
219  gfx::Size original_full_size_of_panel_below_resizing_panel_;
220#endif
221
222
223  // Is the mouse button currently down?
224  bool mouse_pressed_;
225
226  // Location the mouse was pressed at or dragged to last time when we process
227  // the mouse event. Used in drag-and-drop.
228  // This point is represented in the screen coordinate system.
229  gfx::Point last_mouse_location_;
230
231  // Is the titlebar currently being dragged?  That is, has the cursor
232  // moved more than kDragThreshold away from its starting position?
233  MouseDraggingState mouse_dragging_state_;
234
235  // Used to animate the bounds change.
236  scoped_ptr<PanelBoundsAnimation> bounds_animator_;
237  gfx::Rect animation_start_bounds_;
238
239  // Is the panel in highlighted state to draw people's attention?
240  bool is_drawing_attention_;
241
242  // Should we force to paint the panel as inactive? This is needed when we need
243  // to capture the screenshot before an active panel goes minimized.
244  bool force_to_paint_as_inactive_;
245
246  // The last view that had focus in the panel. This is saved so that focus can
247  // be restored properly when a drag ends.
248  views::View* old_focused_view_;
249
250#if defined(OS_WIN)
251  // Used to provide custom taskbar thumbnail for Windows 7 and later.
252  scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;
253#endif
254
255  DISALLOW_COPY_AND_ASSIGN(PanelView);
256};
257
258#endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_VIEW_H_
259