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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_TRANSLATE_INFOBAR_BASE_GTK_H_
      6 #define CHROME_BROWSER_UI_GTK_INFOBARS_TRANSLATE_INFOBAR_BASE_GTK_H_
      7 #pragma once
      8 
      9 #include "chrome/browser/ui/gtk/infobars/infobar_gtk.h"
     10 #include "ui/base/animation/animation_delegate.h"
     11 
     12 class MenuGtk;
     13 class OptionsMenuModel;
     14 class TranslateInfoBarDelegate;
     15 
     16 // This class contains some of the base functionality that translate infobars
     17 // use.
     18 class TranslateInfoBarBase : public InfoBar,
     19                              public ui::AnimationDelegate {
     20  public:
     21   explicit TranslateInfoBarBase(TranslateInfoBarDelegate* delegate);
     22   virtual ~TranslateInfoBarBase();
     23 
     24   // Initializes the infobar widgets. Should be called after the object has been
     25   // created.
     26   virtual void Init();
     27 
     28   // Overridden from InfoBar:
     29   virtual void GetTopColor(InfoBarDelegate::Type type,
     30                            double* r, double* g, double *b);
     31   virtual void GetBottomColor(InfoBarDelegate::Type type,
     32                               double* r, double* g, double *b);
     33 
     34   // Overridden from ui::AnimationDelegate:
     35   virtual void AnimationProgressed(const ui::Animation* animation);
     36 
     37  protected:
     38   // Sub-classes that want to have the options menu button showing sould
     39   // override and return true.
     40   virtual bool ShowOptionsMenuButton() const;
     41 
     42   // Creates a label with the appropriate font and color for the translate
     43   // infobars.
     44   GtkWidget* CreateLabel(const std::string& text);
     45 
     46   // Creates a combobox that displays the languages currently available.
     47   // |selected_language| is the language index (as used in the
     48   // TranslateInfoBarDelegate) that should be selected initially.
     49   // |exclude_language| is the language index of the language that should not be
     50   // included in the list (TranslateInfoBarDelegate::kNoIndex means no language
     51   // excluded).
     52   GtkWidget* CreateLanguageCombobox(size_t selected_language,
     53                                     size_t exclude_language);
     54 
     55   // Given an above-constructed combobox, returns the currently selected
     56   // language id.
     57   static size_t GetLanguageComboboxActiveId(GtkComboBox* combo);
     58 
     59   // Convenience to retrieve the TranslateInfoBarDelegate for this infobar.
     60   TranslateInfoBarDelegate* GetDelegate() const;
     61 
     62  private:
     63   // Builds a button with an arrow in it to emulate the menu-button style from
     64   // the windows version.
     65   static GtkWidget* BuildOptionsMenuButton();
     66 
     67   // The menu displayed when the Options button is pressed.
     68   scoped_ptr<OptionsMenuModel> options_menu_model_;
     69   scoped_ptr<MenuGtk> options_menu_menu_;
     70 
     71   CHROMEGTK_CALLBACK_0(TranslateInfoBarBase, void, OnOptionsClicked);
     72 
     73   // A percentage to average the normal page action background with the error
     74   // background. When 0, the infobar background should be pure PAGE_ACTION_TYPE.
     75   // When 1, the infobar background should be pure WARNING_TYPE.
     76   double background_error_percent_;
     77 
     78   // Changes the color of the background from normal to error color and back.
     79   scoped_ptr<ui::SlideAnimation> background_color_animation_;
     80 
     81   DISALLOW_COPY_AND_ASSIGN(TranslateInfoBarBase);
     82 };
     83 
     84 #endif  // CHROME_BROWSER_UI_GTK_INFOBARS_TRANSLATE_INFOBAR_BASE_GTK_H_
     85