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      1 // Copyright (c) 2011 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_INFOBARS_INFOBAR_GTK_H_
      6 #define CHROME_BROWSER_UI_GTK_INFOBARS_INFOBAR_GTK_H_
      7 #pragma once
      8 
      9 #include "base/basictypes.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "chrome/browser/tab_contents/infobar_delegate.h"
     12 #include "chrome/browser/ui/gtk/infobars/infobar_arrow_model.h"
     13 #include "chrome/browser/ui/gtk/owned_widget_gtk.h"
     14 #include "chrome/browser/ui/gtk/slide_animator_gtk.h"
     15 #include "content/common/notification_observer.h"
     16 #include "content/common/notification_registrar.h"
     17 #include "third_party/skia/include/core/SkPaint.h"
     18 #include "ui/base/gtk/gtk_signal.h"
     19 
     20 class CustomDrawButton;
     21 class GtkThemeService;
     22 class InfoBarContainerGtk;
     23 class InfoBarDelegate;
     24 
     25 class InfoBar : public SlideAnimatorGtk::Delegate,
     26                 public NotificationObserver,
     27                 public InfoBarArrowModel::Observer {
     28  public:
     29   explicit InfoBar(InfoBarDelegate* delegate);
     30   virtual ~InfoBar();
     31 
     32   InfoBarDelegate* delegate() const { return delegate_; }
     33 
     34   // Get the top level native GTK widget for this infobar.
     35   GtkWidget* widget();
     36 
     37   // Set a link to the parent InfoBarContainer. This must be set before the
     38   // InfoBar is added to the view hierarchy.
     39   void set_container(InfoBarContainerGtk* container) { container_ = container; }
     40 
     41   // Starts animating the InfoBar open.
     42   void AnimateOpen();
     43 
     44   // Opens the InfoBar immediately.
     45   void Open();
     46 
     47   // Starts animating the InfoBar closed. It will not be closed until the
     48   // animation has completed, when |Close| will be called.
     49   void AnimateClose();
     50 
     51   // Closes the InfoBar immediately and removes it from its container. Notifies
     52   // the delegate that it has closed. The InfoBar is deleted after this function
     53   // is called.
     54   void Close();
     55 
     56   // Returns true if the infobar is showing the its open or close animation.
     57   bool IsAnimating();
     58 
     59   // Returns true if the infobar is showing the close animation.
     60   bool IsClosing();
     61 
     62   void SetThemeProvider(GtkThemeService* theme_provider);
     63 
     64   // Show an arrow that originates from another infobar (i.e. a bar was added
     65   // below this one). If |other| is NULL, stop showing the arrow.
     66   void ShowArrowFor(InfoBar* other, bool animate);
     67 
     68   // InfoBarArrowModel::Observer implementation.
     69   virtual void PaintStateChanged();
     70 
     71   // SlideAnimatorGtk::Delegate implementation.
     72   virtual void Closed();
     73 
     74   // NotificationObserver implementation.
     75   virtual void Observe(NotificationType type,
     76                        const NotificationSource& source,
     77                        const NotificationDetails& details);
     78 
     79   // Retrieves the component colors for the infobar's background
     80   // gradient. (This varies by infobars and can be animated to change).
     81   virtual void GetTopColor(InfoBarDelegate::Type type,
     82                            double* r, double* g, double *b);
     83   virtual void GetBottomColor(InfoBarDelegate::Type type,
     84                               double* r, double* g, double *b);
     85 
     86   // The total height of the info bar.
     87   static const int kInfoBarHeight;
     88 
     89  protected:
     90   // Spacing after message (and before buttons).
     91   static const int kEndOfLabelSpacing;
     92   // Spacing between buttons.
     93   static const int kButtonButtonSpacing;
     94 
     95   // Removes our associated InfoBarDelegate from the associated TabContents.
     96   // (Will lead to this InfoBar being closed).
     97   void RemoveInfoBar() const;
     98 
     99   // Adds |display_text| to the infobar. If |link_text| is not empty, it is
    100   // rendered as a hyperlink and inserted into |display_text| at |link_offset|,
    101   // or right aligned in the infobar if |link_offset| is |npos|. If a link is
    102   // supplied, |link_callback| must not be null. It will be invoked on click.
    103   void AddLabelWithInlineLink(const string16& display_text,
    104                               const string16& link_text,
    105                               size_t link_offset,
    106                               GCallback callback);
    107 
    108   // The top level widget of the infobar.
    109   scoped_ptr<SlideAnimatorGtk> slide_widget_;
    110 
    111   // The second highest widget in the hierarchy (after the slide widget).
    112   GtkWidget* bg_box_;
    113 
    114   // The hbox that holds infobar elements (button, text, icon, etc.).
    115   GtkWidget* hbox_;
    116 
    117   // The x that closes the bar.
    118   scoped_ptr<CustomDrawButton> close_button_;
    119 
    120   // The InfoBar's container
    121   InfoBarContainerGtk* container_;
    122 
    123   // The InfoBar's delegate.
    124   InfoBarDelegate* delegate_;
    125 
    126   // The theme provider, used for getting border colors.
    127   GtkThemeService* theme_service_;
    128 
    129   // The model that tracks the paint state of the arrow for the infobar
    130   // below this one (if it exists).
    131   InfoBarArrowModel arrow_model_;
    132 
    133   NotificationRegistrar registrar_;
    134 
    135  private:
    136   CHROMEGTK_CALLBACK_0(InfoBar, void, OnCloseButton);
    137   CHROMEGTK_CALLBACK_1(InfoBar, gboolean, OnBackgroundExpose, GdkEventExpose*);
    138 
    139   void UpdateBorderColor();
    140 
    141   DISALLOW_COPY_AND_ASSIGN(InfoBar);
    142 };
    143 
    144 #endif  // CHROME_BROWSER_UI_GTK_INFOBARS_INFOBAR_GTK_H_
    145