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

   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/gfx/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
  18 class AutoKeepAlive;
  19 class Panel;
  20 class PanelBoundsAnimation;
  21 class PanelFrameView;
  22 class TaskbarWindowThumbnailerWin;
  23
  24 namespace views {
  25 class WebView;
  26 }
  27
  28 class PanelView : public NativePanel,
  29                   public views::WidgetObserver,
  30                   public views::WidgetDelegateView,
  31 #if defined(OS_WIN)
  32                   public ui::HWNDMessageFilter,
  33 #endif
  34                   public gfx::AnimationDelegate {
  35  public:
  36   // The size of inside area used for mouse resizing.
  37   static const int kResizeInsideBoundsSize = 5;
  38
  39   PanelView(Panel* panel, const gfx::Rect& bounds, bool always_on_top);
  40   ~PanelView() override;
  41
  42   // Overridden from NativePanel:
  43   void ShowPanel() override;
  44   void ShowPanelInactive() override;
  45   gfx::Rect GetPanelBounds() const override;
  46   void SetPanelBounds(const gfx::Rect& bounds) override;
  47   void SetPanelBoundsInstantly(const gfx::Rect& bounds) override;
  48   void ClosePanel() override;
  49   void ActivatePanel() override;
  50   void DeactivatePanel() override;
  51   bool IsPanelActive() const override;
  52   void PreventActivationByOS(bool prevent_activation) override;
  53   gfx::NativeWindow GetNativePanelWindow() override;
  54   void UpdatePanelTitleBar() override;
  55   void UpdatePanelLoadingAnimations(bool should_animate) override;
  56   void PanelCut() override;
  57   void PanelCopy() override;
  58   void PanelPaste() override;
  59   void DrawAttention(bool draw_attention) override;
  60   bool IsDrawingAttention() const override;
  61   void HandlePanelKeyboardEvent(
  62       const content::NativeWebKeyboardEvent& event) override;
  63   void FullScreenModeChanged(bool is_full_screen) override;
  64   bool IsPanelAlwaysOnTop() const override;
  65   void SetPanelAlwaysOnTop(bool on_top) override;
  66   void UpdatePanelMinimizeRestoreButtonVisibility() override;
  67   void SetWindowCornerStyle(panel::CornerStyle corner_style) override;
  68   void PanelExpansionStateChanging(Panel::ExpansionState old_state,
  69                                    Panel::ExpansionState new_state) override;
  70   void AttachWebContents(content::WebContents* contents) override;
  71   void DetachWebContents(content::WebContents* contents) override;
  72   gfx::Size WindowSizeFromContentSize(
  73       const gfx::Size& content_size) const override;
  74   gfx::Size ContentSizeFromWindowSize(
  75       const gfx::Size& window_size) const override;
  76   int TitleOnlyHeight() const override;
  77   void MinimizePanelBySystem() override;
  78   bool IsPanelMinimizedBySystem() const override;
  79   bool IsPanelShownOnActiveDesktop() const override;
  80   void ShowShadow(bool show) override;
  81   NativePanelTesting* CreateNativePanelTesting() override;
  82
  83   // Overridden from views::View:
  84   gfx::Size GetMinimumSize() const override;
  85   gfx::Size GetMaximumSize() const override;
  86
  87   // Return true if the mouse event is handled.
  88   // |mouse_location| is in screen coordinate system.
  89   bool OnTitlebarMousePressed(const gfx::Point& mouse_location);
  90   bool OnTitlebarMouseDragged(const gfx::Point& mouse_location);
  91   bool OnTitlebarMouseReleased(panel::ClickModifier modifier);
  92   bool OnTitlebarMouseCaptureLost();
  93
  94   PanelFrameView* GetFrameView() const;
  95   bool IsAnimatingBounds() const;
  96
  97   Panel* panel() const { return panel_.get(); }
  98   views::Widget* window() const { return window_; }
  99   bool force_to_paint_as_inactive() const {
 100     return force_to_paint_as_inactive_;
 101   }
 102
 103   // PanelStackView might want to update the stored bounds directly since it
 104   // has already taken care of updating the window bounds directly.
 105   void set_cached_bounds_directly(const gfx::Rect& bounds) { bounds_ = bounds; }
 106
 107  private:
 108   enum MouseDraggingState {
 109     NO_DRAGGING,
 110     DRAGGING_STARTED,
 111     DRAGGING_ENDED
 112   };
 113
 114   // Overridden from views::WidgetDelegate:
 115   void OnDisplayChanged() override;
 116   void OnWorkAreaChanged() override;
 117   bool WillProcessWorkAreaChange() const override;
 118   views::View* GetContentsView() override;
 119   views::NonClientFrameView* CreateNonClientFrameView(
 120       views::Widget* widget) override;
 121   bool CanResize() const override;
 122   bool CanMaximize() const override;
 123   bool CanMinimize() const override;
 124   views::Widget* GetWidget() override;
 125   const views::Widget* GetWidget() const override;
 126   base::string16 GetWindowTitle() const override;
 127   gfx::ImageSkia GetWindowAppIcon() override;
 128   gfx::ImageSkia GetWindowIcon() override;
 129   void WindowClosing() override;
 130   void DeleteDelegate() override;
 131   void OnWindowBeginUserBoundsChange() override;
 132   void OnWindowEndUserBoundsChange() override;
 133
 134   // Overridden from views::View:
 135   void Layout() override;
 136   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
 137
 138   // Overridden from views::WidgetObserver:
 139   void OnWidgetDestroying(views::Widget* widget) override;
 140   void OnWidgetActivationChanged(views::Widget* widget, bool active) override;
 141   void OnWidgetBoundsChanged(views::Widget* widget,
 142                              const gfx::Rect& new_bounds) override;
 143
 144   // Overridden from ui::HWNDMessageFilter:
 145 #if defined(OS_WIN)
 146   bool FilterMessage(HWND hwnd,
 147                      UINT message,
 148                      WPARAM w_param,
 149                      LPARAM l_param,
 150                      LRESULT* l_result) override;
 151 #endif
 152
 153   // Overridden from AnimationDelegate:
 154   void AnimationEnded(const gfx::Animation* animation) override;
 155   void AnimationProgressed(const gfx::Animation* animation) override;
 156
 157   void UpdateLoadingAnimations(bool should_animate);
 158   void UpdateWindowTitle();
 159   void UpdateWindowIcon();
 160   void SetBoundsInternal(const gfx::Rect& bounds, bool animate);
 161   bool EndDragging(bool cancelled);
 162
 163   // Sets the bounds of the underlying window to |new_bounds|. Note that this
 164   // might update the window style to work around the minimum overlapped
 165   // window height limitation.
 166   void SetWidgetBounds(const gfx::Rect& new_bounds);
 167
 168 #if defined(OS_WIN)
 169   // Sets |attribute_value_to_set| and/or clears |attribute_value_to_reset| for
 170   // the attibute denoted by |attribute_index|. This is used to update the style
 171   // or extended style for the native window.
 172   void UpdateWindowAttribute(int attribute_index,
 173                              int attribute_value_to_set,
 174                              int attribute_value_to_reset,
 175                              bool update_frame);
 176 #endif
 177
 178   scoped_ptr<Panel> panel_;
 179   gfx::Rect bounds_;
 180
 181   // The window that holds all panel views. Lifetime managed by native widget.
 182   // See widget.h.
 183   views::Widget* window_;
 184
 185   // Close gets called more than once, so use this to do one-time clean up once.
 186   bool window_closed_;
 187
 188   // The view hosting the web contents. Will be destroyed when child views
 189   // of this class are destroyed.
 190   views::WebView* web_view_;
 191
 192   // True if the panel should always stay on top of other windows.
 193   bool always_on_top_;
 194
 195   // Is the panel receiving the focus?
 196   bool focused_;
 197
 198   // True if the user is resizing the panel.
 199   bool user_resizing_;
 200
 201 #if defined(OS_WIN)
 202   // True if the user is resizing the interior edge of a stack.
 203   bool user_resizing_interior_stacked_panel_edge_;
 204
 205   // The original full size of the resizing panel before the resizing states.
 206   gfx::Size original_full_size_of_resizing_panel_;
 207
 208   // The original full size of the panel below the resizing panel before the
 209   // resizing starts.
 210   gfx::Size original_full_size_of_panel_below_resizing_panel_;
 211 #endif
 212
 213
 214   // Is the mouse button currently down?
 215   bool mouse_pressed_;
 216
 217   // Location the mouse was pressed at or dragged to last time when we process
 218   // the mouse event. Used in drag-and-drop.
 219   // This point is represented in the screen coordinate system.
 220   gfx::Point last_mouse_location_;
 221
 222   // Is the titlebar currently being dragged?  That is, has the cursor
 223   // moved more than kDragThreshold away from its starting position?
 224   MouseDraggingState mouse_dragging_state_;
 225
 226   // Used to animate the bounds change.
 227   scoped_ptr<PanelBoundsAnimation> bounds_animator_;
 228   gfx::Rect animation_start_bounds_;
 229
 230   // Is the panel in highlighted state to draw people's attention?
 231   bool is_drawing_attention_;
 232
 233   // Should we force to paint the panel as inactive? This is needed when we need
 234   // to capture the screenshot before an active panel goes minimized.
 235   bool force_to_paint_as_inactive_;
 236
 237   // The last view that had focus in the panel. This is saved so that focus can
 238   // be restored properly when a drag ends.
 239   views::View* old_focused_view_;
 240
 241   scoped_ptr<AutoKeepAlive> keep_alive_;
 242
 243 #if defined(OS_WIN)
 244   // Used to provide custom taskbar thumbnail for Windows 7 and later.
 245   scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;
 246 #endif
 247
 248   DISALLOW_COPY_AND_ASSIGN(PanelView);
 249 };
 250
 251 #endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_VIEW_H_