chrome/browser/ui/gtk/browser_titlebar.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 // A helper class that contains the gtk widgets that make up the titlebar.  The
   6 // titlebar consists of the tabstrip and if the custom chrome frame is turned
   7 // on, it includes the taller titlebar and minimize, restore, maximize, and
   8 // close buttons.
   9
  10 #ifndef CHROME_BROWSER_UI_GTK_BROWSER_TITLEBAR_H_
  11 #define CHROME_BROWSER_UI_GTK_BROWSER_TITLEBAR_H_
  12
  13 #include <gtk/gtk.h>
  14
  15 #include "base/compiler_specific.h"
  16 #include "base/memory/scoped_ptr.h"
  17 #include "base/prefs/pref_member.h"
  18 #include "chrome/browser/ui/gtk/titlebar_throb_animation.h"
  19 #include "content/public/browser/notification_observer.h"
  20 #include "content/public/browser/notification_registrar.h"
  21 #include "ui/base/gtk/gtk_signal.h"
  22 #include "ui/base/models/simple_menu_model.h"
  23 #include "ui/base/x/active_window_watcher_x_observer.h"
  24
  25 class AvatarMenuButtonGtk;
  26 class BrowserWindowGtk;
  27 class CustomDrawButton;
  28 class GtkThemeService;
  29 class MenuGtk;
  30 class PopupPageMenuModel;
  31
  32 namespace content {
  33 class WebContents;
  34 }
  35
  36 class BrowserTitlebar : public content::NotificationObserver,
  37                         public ui::ActiveWindowWatcherXObserver,
  38                         public ui::SimpleMenuModel::Delegate {
  39  public:
  40   // A default button order string for when we aren't asking gconf for the
  41   // metacity configuration.
  42   static const char kDefaultButtonString[];
  43
  44   BrowserTitlebar(BrowserWindowGtk* browser_window, GtkWindow* window);
  45   virtual ~BrowserTitlebar();
  46
  47   // Updates the title and icon when in app or popup mode (no tabstrip).
  48   void UpdateTitleAndIcon();
  49
  50   GtkWidget* widget() {
  51     return container_;
  52   }
  53
  54   void set_window(GtkWindow* window) { window_ = window; }
  55
  56   // Build the titlebar, the space above the tab strip, and (maybe) the min,
  57   // max, close buttons. |container_| is the gtk container that we put the
  58   // widget into.
  59   void Init();
  60
  61   // Builds the buttons based on the metacity |button_string|.
  62   void BuildButtons(const std::string& button_string);
  63
  64   // Update the appearance of the title bar based on whether we're showing a
  65   // custom frame or not. If |use_custom_frame| is true, we show an extra
  66   // tall titlebar and the min/max/close buttons.
  67   void UpdateCustomFrame(bool use_custom_frame);
  68
  69   // Called by the browser asking us to update the loading throbber.
  70   // |web_contents| is the tab that is associated with the window throbber.
  71   // |web_contents| can be null.
  72   void UpdateThrobber(content::WebContents* web_contents);
  73
  74   // On Windows, right clicking in the titlebar background brings up the system
  75   // menu. There's no such thing on linux, so we just show the menu items we
  76   // add to the menu.
  77   void ShowContextMenu(GdkEventButton* event);
  78
  79   AvatarMenuButtonGtk* avatar_button() { return avatar_button_.get(); }
  80
  81  private:
  82   class ContextMenuModel : public ui::SimpleMenuModel {
  83    public:
  84     explicit ContextMenuModel(ui::SimpleMenuModel::Delegate* delegate);
  85   };
  86
  87   // Builds the button as denoted by |button_token|. Returns true if the button
  88   // is created successfully.
  89   bool BuildButton(const std::string& button_token, bool left_side);
  90
  91   // Retrieves the 3 image ids (IDR_) and a tooltip id (IDS) for the purpose of
  92   // painting a CustomDraw button.
  93   void GetButtonResources(const std::string& button_name,
  94                           int* normal_image_id,
  95                           int* pressed_image_id,
  96                           int* hover_image_id,
  97                           int* tooltip_id) const;
  98
  99   // Constructs a CustomDraw button given button name and left or right side of
 100   // the titlebar where the button is placed.
 101   CustomDrawButton* CreateTitlebarButton(const std::string& button_name,
 102                                          bool left_side);
 103
 104   // Lazily builds and returns |titlebar_{left,right}_buttons_vbox_| and their
 105   // subtrees. We do this lazily because in most situations, only one of them
 106   // is allocated (though the user can (and do) manually mess with their gconf
 107   // settings to get absolutely horrid combinations of buttons on both sides.
 108   GtkWidget* GetButtonHBox(bool left_side);
 109
 110   // Updates the theme supplied background color and image.
 111   void UpdateButtonBackground(CustomDrawButton* button);
 112
 113   // Updates the color of the title bar. Called whenever we have a state
 114   // change in the window.
 115   void UpdateTextColor();
 116
 117   // Updates the color of the avatar label text and background.
 118   void UpdateAvatarLabel();
 119
 120   // Update the titlebar spacing based on the custom frame and maximized state.
 121   void UpdateTitlebarAlignment();
 122
 123   // Updates the avatar image displayed, either a multi-profile avatar or the
 124   // incognito spy guy.
 125   void UpdateAvatar();
 126
 127   // The maximize button was clicked, take an action depending on which mouse
 128   // button the user pressed.
 129   void MaximizeButtonClicked();
 130
 131   // Updates the visibility of the maximize and restore buttons; only one can
 132   // be visible at a time.
 133   void UpdateMaximizeRestoreVisibility();
 134
 135   // Callback for changes to window state.  This includes
 136   // maximizing/restoring/minimizing the window.
 137   CHROMEG_CALLBACK_1(BrowserTitlebar, gboolean, OnWindowStateChanged,
 138                      GtkWindow*, GdkEventWindowState*);
 139
 140   // Callback for mousewheel events.
 141   CHROMEGTK_CALLBACK_1(BrowserTitlebar, gboolean, OnScroll,
 142                        GdkEventScroll*);
 143
 144   // Callback for min/max/close buttons.
 145   CHROMEGTK_CALLBACK_0(BrowserTitlebar, void, OnButtonClicked);
 146
 147   // Callback for favicon/settings buttons.
 148   CHROMEGTK_CALLBACK_1(BrowserTitlebar, gboolean,
 149                        OnFaviconMenuButtonPressed, GdkEventButton*);
 150
 151   // Callback for avatar menu label.
 152   CHROMEGTK_CALLBACK_1(BrowserTitlebar, gboolean,
 153                        OnAvatarLabelButtonPressed, GdkEventButton*);
 154
 155   // -- Context Menu -----------------------------------------------------------
 156
 157   // SimpleMenuModel::Delegate implementation:
 158   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
 159   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
 160   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
 161   virtual bool GetAcceleratorForCommandId(
 162       int command_id,
 163       ui::Accelerator* accelerator) OVERRIDE;
 164
 165   // Overridden from content::NotificationObserver:
 166   virtual void Observe(int type,
 167                        const content::NotificationSource& source,
 168                        const content::NotificationDetails& details) OVERRIDE;
 169
 170   // Overriden from ActiveWindowWatcherXObserver.
 171   virtual void ActiveWindowChanged(GdkWindow* active_window) OVERRIDE;
 172
 173   // Whether to display the avatar image.
 174   bool ShouldDisplayAvatar();
 175
 176   // Returns true if the profile associated with this BrowserWindow is off the
 177   // record.
 178   bool IsOffTheRecord();
 179
 180   // Pointers to the browser window that owns us and its GtkWindow.
 181   BrowserWindowGtk* browser_window_;
 182   GtkWindow* window_;
 183
 184   // The container widget the holds the hbox which contains the whole titlebar.
 185   GtkWidget* container_;
 186
 187   // The hbox that contains the whole titlebar.
 188   GtkWidget* container_hbox_;
 189
 190   // VBoxes that holds the min/max/close buttons box and an optional padding
 191   // that defines the skyline if the user turns off window manager decorations.
 192   // There is a left and right version of this box since we try to integrate
 193   // with the recent Ubuntu theme changes which put the buttons on the left.
 194   GtkWidget* titlebar_left_buttons_vbox_;
 195   GtkWidget* titlebar_right_buttons_vbox_;
 196
 197   // HBoxes that contains the actual min/max/close buttons.
 198   GtkWidget* titlebar_left_buttons_hbox_;
 199   GtkWidget* titlebar_right_buttons_hbox_;
 200
 201   // Avatar frame. One of these frames holds either the spy guy in incognito
 202   // mode, or the avatar image when using multiple-profiles. It's the side with
 203   // the least window control buttons (close, maximize, minimize).
 204   // These pointers are never NULL.
 205   GtkWidget* titlebar_left_avatar_frame_;
 206   GtkWidget* titlebar_right_avatar_frame_;
 207
 208   // Avatar label. Used if the active profile is managed. The label is either
 209   // displayed on the right side of the avatar image if the image is displayed
 210   // on the left, or on the left side of the avatar image if the image is
 211   // displayed on the right.
 212   GtkWidget* titlebar_left_label_frame_;
 213   GtkWidget* titlebar_right_label_frame_;
 214
 215   // The avatar image widget. It will be NULL if there is no avatar displayed.
 216   GtkWidget* avatar_;
 217
 218   // The avatar label of a managed user. It will be NULL if no avatar label is
 219   // displayed.
 220   GtkWidget* avatar_label_;
 221   GtkWidget* avatar_label_bg_;
 222
 223   // Padding between the titlebar buttons and the top of the screen. Only show
 224   // when not maximized.
 225   GtkWidget* top_padding_left_;
 226   GtkWidget* top_padding_right_;
 227
 228   // Gtk alignment that contains the tab strip.  If the user turns off window
 229   // manager decorations, we draw this taller.
 230   GtkWidget* titlebar_alignment_;
 231
 232   // The favicon and page title used when in app mode or popup mode.
 233   GtkWidget* app_mode_favicon_;
 234   GtkWidget* app_mode_title_;
 235
 236   // Whether we are using a custom frame.
 237   bool using_custom_frame_;
 238
 239   // Whether we have focus (gtk_window_is_active() sometimes returns the wrong
 240   // value, so manually track the focus-in and focus-out events.)
 241   bool window_has_focus_;
 242
 243   // Whether to display the avatar image on the left or right of the titlebar.
 244   bool display_avatar_on_left_;
 245
 246   // We change the size of these three buttons when the window is maximized, so
 247   // we use these structs to keep track of their original size.
 248   GtkRequisition close_button_req_;
 249   GtkRequisition minimize_button_req_;
 250   GtkRequisition restore_button_req_;
 251
 252   // Maximize and restore widgets in the titlebar.
 253   scoped_ptr<CustomDrawButton> minimize_button_;
 254   scoped_ptr<CustomDrawButton> maximize_button_;
 255   scoped_ptr<CustomDrawButton> restore_button_;
 256   scoped_ptr<CustomDrawButton> close_button_;
 257
 258   // The context menu view and model.
 259   scoped_ptr<MenuGtk> context_menu_;
 260   scoped_ptr<ContextMenuModel> context_menu_model_;
 261
 262   // The favicon menu view and model.
 263   scoped_ptr<MenuGtk> favicon_menu_;
 264   scoped_ptr<PopupPageMenuModel> favicon_menu_model_;
 265
 266   // The throbber used when the window is in app mode or popup window mode.
 267   TitlebarThrobAnimation throbber_;
 268
 269   // The avatar button.
 270   scoped_ptr<AvatarMenuButtonGtk> avatar_button_;
 271
 272   // Theme provider for building buttons.
 273   GtkThemeService* theme_service_;
 274
 275   content::NotificationRegistrar registrar_;
 276 };
 277
 278 #endif  // CHROME_BROWSER_UI_GTK_BROWSER_TITLEBAR_H_