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      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   virtual ~PanelView();
     41 
     42   // Overridden from NativePanel:
     43   virtual void ShowPanel() OVERRIDE;
     44   virtual void ShowPanelInactive() OVERRIDE;
     45   virtual gfx::Rect GetPanelBounds() const OVERRIDE;
     46   virtual void SetPanelBounds(const gfx::Rect& bounds) OVERRIDE;
     47   virtual void SetPanelBoundsInstantly(const gfx::Rect& bounds) OVERRIDE;
     48   virtual void ClosePanel() OVERRIDE;
     49   virtual void ActivatePanel() OVERRIDE;
     50   virtual void DeactivatePanel() OVERRIDE;
     51   virtual bool IsPanelActive() const OVERRIDE;
     52   virtual void PreventActivationByOS(bool prevent_activation) OVERRIDE;
     53   virtual gfx::NativeWindow GetNativePanelWindow() OVERRIDE;
     54   virtual void UpdatePanelTitleBar() OVERRIDE;
     55   virtual void UpdatePanelLoadingAnimations(bool should_animate) OVERRIDE;
     56   virtual void PanelWebContentsFocused(content::WebContents* contents) OVERRIDE;
     57   virtual void PanelCut() OVERRIDE;
     58   virtual void PanelCopy() OVERRIDE;
     59   virtual void PanelPaste() OVERRIDE;
     60   virtual void DrawAttention(bool draw_attention) OVERRIDE;
     61   virtual bool IsDrawingAttention() const OVERRIDE;
     62   virtual void HandlePanelKeyboardEvent(
     63       const content::NativeWebKeyboardEvent& event) OVERRIDE;
     64   virtual void FullScreenModeChanged(bool is_full_screen) OVERRIDE;
     65   virtual bool IsPanelAlwaysOnTop() const OVERRIDE;
     66   virtual void SetPanelAlwaysOnTop(bool on_top) 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() const OVERRIDE;
     87   virtual gfx::Size GetMaximumSize() const 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 base::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 gfx::Animation* animation) OVERRIDE;
    163   virtual void AnimationProgressed(const gfx::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 
    171   // Sets the bounds of the underlying window to |new_bounds|. Note that this
    172   // might update the window style to work around the minimum overlapped
    173   // window height limitation.
    174   void SetWidgetBounds(const gfx::Rect& new_bounds);
    175 
    176 #if defined(OS_WIN)
    177   // Sets |attribute_value_to_set| and/or clears |attribute_value_to_reset| for
    178   // the attibute denoted by |attribute_index|. This is used to update the style
    179   // or extended style for the native window.
    180   void UpdateWindowAttribute(int attribute_index,
    181                              int attribute_value_to_set,
    182                              int attribute_value_to_reset,
    183                              bool update_frame);
    184 #endif
    185 
    186   scoped_ptr<Panel> panel_;
    187   gfx::Rect bounds_;
    188 
    189   // The window that holds all panel views. Lifetime managed by native widget.
    190   // See widget.h.
    191   views::Widget* window_;
    192 
    193   // Close gets called more than once, so use this to do one-time clean up once.
    194   bool window_closed_;
    195 
    196   // The view hosting the web contents. Will be destroyed when child views
    197   // of this class are destroyed.
    198   views::WebView* web_view_;
    199 
    200   // True if the panel should always stay on top of other windows.
    201   bool always_on_top_;
    202 
    203   // Is the panel receiving the focus?
    204   bool focused_;
    205 
    206   // True if the user is resizing the panel.
    207   bool user_resizing_;
    208 
    209 #if defined(OS_WIN)
    210   // True if the user is resizing the interior edge of a stack.
    211   bool user_resizing_interior_stacked_panel_edge_;
    212 
    213   // The original full size of the resizing panel before the resizing states.
    214   gfx::Size original_full_size_of_resizing_panel_;
    215 
    216   // The original full size of the panel below the resizing panel before the
    217   // resizing starts.
    218   gfx::Size original_full_size_of_panel_below_resizing_panel_;
    219 #endif
    220 
    221 
    222   // Is the mouse button currently down?
    223   bool mouse_pressed_;
    224 
    225   // Location the mouse was pressed at or dragged to last time when we process
    226   // the mouse event. Used in drag-and-drop.
    227   // This point is represented in the screen coordinate system.
    228   gfx::Point last_mouse_location_;
    229 
    230   // Is the titlebar currently being dragged?  That is, has the cursor
    231   // moved more than kDragThreshold away from its starting position?
    232   MouseDraggingState mouse_dragging_state_;
    233 
    234   // Used to animate the bounds change.
    235   scoped_ptr<PanelBoundsAnimation> bounds_animator_;
    236   gfx::Rect animation_start_bounds_;
    237 
    238   // Is the panel in highlighted state to draw people's attention?
    239   bool is_drawing_attention_;
    240 
    241   // Should we force to paint the panel as inactive? This is needed when we need
    242   // to capture the screenshot before an active panel goes minimized.
    243   bool force_to_paint_as_inactive_;
    244 
    245   // The last view that had focus in the panel. This is saved so that focus can
    246   // be restored properly when a drag ends.
    247   views::View* old_focused_view_;
    248 
    249   scoped_ptr<AutoKeepAlive> keep_alive_;
    250 
    251 #if defined(OS_WIN)
    252   // Used to provide custom taskbar thumbnail for Windows 7 and later.
    253   scoped_ptr<TaskbarWindowThumbnailerWin> thumbnailer_;
    254 #endif
    255 
    256   DISALLOW_COPY_AND_ASSIGN(PanelView);
    257 };
    258 
    259 #endif  // CHROME_BROWSER_UI_VIEWS_PANELS_PANEL_VIEW_H_
    260