chrome/browser/ui/gtk/download/download_shelf_gtk.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_GTK_DOWNLOAD_DOWNLOAD_SHELF_GTK_H_
   6 #define CHROME_BROWSER_UI_GTK_DOWNLOAD_DOWNLOAD_SHELF_GTK_H_
   7
   8 #include <gtk/gtk.h>
   9
  10 #include <vector>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "chrome/browser/download/download_shelf.h"
  17 #include "chrome/browser/ui/gtk/slide_animator_gtk.h"
  18 #include "content/public/browser/notification_observer.h"
  19 #include "content/public/browser/notification_registrar.h"
  20 #include "ui/base/gtk/gtk_signal.h"
  21 #include "ui/base/gtk/owned_widget_gtk.h"
  22 #include "ui/gfx/native_widget_types.h"
  23
  24 class Browser;
  25 class CustomDrawButton;
  26 class DownloadItemGtk;
  27 class GtkThemeService;
  28
  29 namespace content {
  30 class PageNavigator;
  31 }
  32
  33 namespace gfx {
  34 class Point;
  35 }
  36
  37 class DownloadShelfGtk : public DownloadShelf,
  38                          public content::NotificationObserver,
  39                          public SlideAnimatorGtk::Delegate,
  40                          public base::MessageLoopForUI::Observer {
  41  public:
  42   DownloadShelfGtk(Browser* browser, gfx::NativeView view);
  43
  44   virtual ~DownloadShelfGtk();
  45
  46   // Retrieves the navigator for loading pages.
  47   content::PageNavigator* GetNavigator();
  48
  49   // DownloadShelf implementation.
  50   virtual bool IsShowing() const OVERRIDE;
  51   virtual bool IsClosing() const OVERRIDE;
  52   virtual Browser* browser() const OVERRIDE;
  53
  54   // SlideAnimatorGtk::Delegate implementation.
  55   virtual void Closed() OVERRIDE;
  56
  57   // Overridden from content::NotificationObserver:
  58   virtual void Observe(int type,
  59                        const content::NotificationSource& source,
  60                        const content::NotificationDetails& details) OVERRIDE;
  61
  62   // Returns the current height of the shelf.
  63   int GetHeight() const;
  64
  65   // MessageLoop::Observer implementation:
  66   virtual void WillProcessEvent(GdkEvent* event) OVERRIDE;
  67   virtual void DidProcessEvent(GdkEvent* event) OVERRIDE;
  68
  69  protected:
  70   // DownloadShelf implementation.
  71   virtual void DoAddDownload(content::DownloadItem* download) OVERRIDE;
  72   virtual void DoShow() OVERRIDE;
  73   virtual void DoClose(CloseReason reason) OVERRIDE;
  74
  75  private:
  76   // Remove |download_item| from the download shelf and delete it.
  77   void RemoveDownloadItem(DownloadItemGtk* download_item);
  78
  79   // Get the hbox download items ought to pack themselves into.
  80   GtkWidget* GetHBox() const;
  81
  82   // Show more hidden download items if there is enough space in the shelf.
  83   // It's called when a download item is removed from the shelf or an item's
  84   // size is changed.
  85   void MaybeShowMoreDownloadItems();
  86
  87   // Checks that all download items have been opened, and sets the auto-close
  88   // state of the shelf if so.
  89   void AutoCloseIfPossible();
  90
  91   // Cancels the auto-close state set by AutoCloseIfPossible, including any
  92   // pending close tasks that have already been posted.
  93   void CancelAutoClose();
  94
  95   // A download item has been opened. It might be possible to automatically
  96   // close now.
  97   void ItemOpened();
  98
  99   // Sets whether the shelf should automatically close.
 100   void SetCloseOnMouseOut(bool close);
 101
 102   // Returns whether the given point is within the "zone" of the shelf, which is
 103   // the shelf and a band of 40 pixels on the top of it.
 104   bool IsCursorInShelfZone(const gfx::Point& cursor_screen_coords);
 105
 106   // Synthesized enter-notify and leave-notify events for the shelf's "zone".
 107   void MouseLeftShelf();
 108   void MouseEnteredShelf();
 109
 110   CHROMEGTK_CALLBACK_0(DownloadShelfGtk, void, OnButtonClick);
 111
 112   // The browser that owns this download shelf.
 113   Browser* browser_;
 114
 115   // The top level widget of the shelf.
 116   scoped_ptr<SlideAnimatorGtk> slide_widget_;
 117
 118   // |items_hbox_| holds the download items.
 119   ui::OwnedWidgetGtk items_hbox_;
 120
 121   // |shelf_| is the second highest level widget. See the constructor
 122   // for an explanation of the widget layout.
 123   ui::OwnedWidgetGtk shelf_;
 124
 125   // Top level event box which draws the one pixel border.
 126   GtkWidget* top_border_;
 127
 128   // A GtkEventBox which we color.
 129   GtkWidget* padding_bg_;
 130
 131   // The "Show all downloads..." link.
 132   GtkWidget* link_button_;
 133
 134   // The 'x' that the user can press to hide the download shelf.
 135   scoped_ptr<CustomDrawButton> close_button_;
 136
 137   // Keeps track of our current hide/show state.
 138   bool is_showing_;
 139
 140   // The download items we have added to our shelf.
 141   std::vector<DownloadItemGtk*> download_items_;
 142
 143   // Gives us our colors and theme information.
 144   GtkThemeService* theme_service_;
 145
 146   content::NotificationRegistrar registrar_;
 147
 148   // True if the shelf will automatically close when the user mouses out.
 149   bool close_on_mouse_out_;
 150
 151   // True if the mouse is within the shelf's bounds, as of the last mouse event
 152   // we received.
 153   bool mouse_in_shelf_;
 154
 155   base::WeakPtrFactory<DownloadShelfGtk> weak_factory_;
 156
 157   friend class DownloadItemGtk;
 158 };
 159
 160 #endif  // CHROME_BROWSER_UI_GTK_DOWNLOAD_DOWNLOAD_SHELF_GTK_H_