chrome/browser/ui/gtk/status_bubble_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_STATUS_BUBBLE_GTK_H_
   6 #define CHROME_BROWSER_UI_GTK_STATUS_BUBBLE_GTK_H_
   7
   8 #include <gtk/gtk.h>
   9
  10 #include <string>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/timer/timer.h"
  15 #include "chrome/browser/ui/status_bubble.h"
  16 #include "content/public/browser/notification_observer.h"
  17 #include "content/public/browser/notification_registrar.h"
  18 #include "ui/base/gtk/gtk_signal.h"
  19 #include "ui/base/gtk/owned_widget_gtk.h"
  20 #include "ui/gfx/animation/animation_delegate.h"
  21 #include "ui/gfx/point.h"
  22 #include "url/gurl.h"
  23
  24 class GtkThemeService;
  25 class Profile;
  26
  27 namespace gfx {
  28 class SlideAnimation;
  29 }
  30
  31 // GTK implementation of StatusBubble. Unlike Windows, our status bubble
  32 // doesn't have the nice leave-the-window effect since we can't rely on the
  33 // window manager to not try to be "helpful" and center our popups, etc.
  34 // We therefore position it absolutely in a GtkFixed, that we don't own.
  35 class StatusBubbleGtk : public StatusBubble,
  36                         public content::NotificationObserver,
  37                         public gfx::AnimationDelegate {
  38  public:
  39   explicit StatusBubbleGtk(Profile* profile);
  40   virtual ~StatusBubbleGtk();
  41
  42   bool flip_horizontally() const { return flip_horizontally_; }
  43   int y_offset() const { return y_offset_; }
  44
  45   // StatusBubble implementation.
  46   virtual void SetStatus(const base::string16& status) OVERRIDE;
  47   virtual void SetURL(const GURL& url, const std::string& languages) OVERRIDE;
  48   virtual void Hide() OVERRIDE;
  49   virtual void MouseMoved(const gfx::Point& location,
  50                           bool left_content) OVERRIDE;
  51
  52   // gfx::AnimationDelegate implementation.
  53   virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE;
  54   virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
  55
  56   // Called when the download shelf becomes visible or invisible.
  57   // This is used by to ensure that the status bubble does not obscure
  58   // the download shelf, when it is visible.
  59   virtual void UpdateDownloadShelfVisibility(bool visible) OVERRIDE;
  60
  61   // Overridden from content::NotificationObserver:
  62   virtual void Observe(int type,
  63                        const content::NotificationSource& source,
  64                        const content::NotificationDetails& details) OVERRIDE;
  65
  66   // Top of the widget hierarchy for a StatusBubble. This top level widget is
  67   // guarenteed to have its gtk_widget_name set to "status-bubble" for
  68   // identification.
  69   GtkWidget* widget() { return container_.get(); }
  70
  71  private:
  72   // Sets the text of the label widget and controls visibility. (As contrasted
  73   // with setting the current status or URL text, which may be ignored for now).
  74   void SetStatusTextTo(const std::string& status_utf8);
  75
  76   // Sets the status text to the current value of |url_|, eliding it as
  77   // necessary.
  78   void SetStatusTextToURL();
  79
  80   // Sets the status bubble's location in the parent GtkFixed, shows the widget
  81   // and makes sure that the status bubble has the highest z-order.
  82   void Show();
  83
  84   // Builds the widgets, containers, etc.
  85   void InitWidgets();
  86
  87   // Notification from the window that we should retheme ourself.
  88   void UserChangedTheme();
  89
  90   // Sets whether the bubble should be flipped horizontally and displayed on the
  91   // opposite side of the tab contents.  Reshapes the container and queues a
  92   // redraw if necessary.
  93   void SetFlipHorizontally(bool flip_horizontally);
  94
  95   // Expand the bubble up to the full width of the browser, so that the entire
  96   // URL may be seen. Called after the user hovers over a link for sufficient
  97   // time.
  98   void ExpandURL();
  99
 100   // Adjust the actual size of the bubble by changing the label's size request.
 101   void UpdateLabelSizeRequest();
 102
 103   // Returns true if the status bubble is in the expand-state (i.e., is
 104   // currently expanded or in the process of expanding).
 105   bool expanded() {
 106     return expand_animation_.get();
 107   }
 108
 109   CHROMEGTK_CALLBACK_1(StatusBubbleGtk, gboolean, HandleMotionNotify,
 110                        GdkEventMotion*);
 111
 112   CHROMEGTK_CALLBACK_1(StatusBubbleGtk, gboolean, HandleEnterNotify,
 113                        GdkEventCrossing*);
 114
 115   content::NotificationRegistrar registrar_;
 116
 117   // Provides colors.
 118   GtkThemeService* theme_service_;
 119
 120   // The toplevel event box.
 121   ui::OwnedWidgetGtk container_;
 122
 123   // The GtkAlignment holding |label_|.
 124   GtkWidget* padding_;
 125
 126   // The GtkLabel holding the text.
 127   ui::OwnedWidgetGtk label_;
 128
 129   // The status text we want to display when there are no URLs to display.
 130   std::string status_text_;
 131
 132   // The URL we are displaying for.
 133   GURL url_;
 134
 135   // The possibly elided url text we want to display.
 136   std::string url_text_;
 137
 138   // Used to determine the character set that the user can read (for eliding
 139   // the url text).
 140   std::string languages_;
 141
 142   // A timer that hides our window after a delay.
 143   base::OneShotTimer<StatusBubbleGtk> hide_timer_;
 144
 145   // A timer that expands our window after a delay.
 146   base::OneShotTimer<StatusBubbleGtk> expand_timer_;
 147
 148   // The animation for resizing the status bubble on long hovers.
 149   scoped_ptr<gfx::SlideAnimation> expand_animation_;
 150
 151   // The start and end width of the current resize animation.
 152   int start_width_;
 153   int desired_width_;
 154
 155   // Should the bubble be flipped horizontally (e.g. displayed on the right for
 156   // an LTR language)?  We move the bubble to the other side of the tab contents
 157   // rather than sliding it down when the download shelf is visible.
 158   bool flip_horizontally_;
 159
 160   // Vertical offset used to hide the status bubble as the pointer nears it.
 161   int y_offset_;
 162
 163   // If the download shelf is visible, do not obscure it.
 164   bool download_shelf_is_visible_;
 165
 166   // 'location' and 'left_content' values from the last invocation of
 167   // MouseMoved().  We hang onto these so we can move the bubble if necessary
 168   // when its text changes, triggering a size change.
 169   gfx::Point last_mouse_location_;
 170   bool last_mouse_left_content_;
 171
 172   // Shortly after the cursor enters the status bubble, we'll get a message
 173   // that the cursor left the content area. This lets us ignore that.
 174   bool ignore_next_left_content_;
 175 };
 176
 177 #endif  // CHROME_BROWSER_UI_GTK_STATUS_BUBBLE_GTK_H_