chrome/browser/ui/views/infobars/infobar_view.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_VIEWS_INFOBARS_INFOBAR_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_VIEW_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "chrome/browser/infobars/infobar.h"
  11 #include "chrome/browser/infobars/infobar_container.h"
  12 #include "third_party/skia/include/core/SkPath.h"
  13 #include "ui/views/controls/button/button.h"
  14 #include "ui/views/controls/menu/menu_item_view.h"
  15 #include "ui/views/focus/external_focus_tracker.h"
  16
  17 namespace ui {
  18 class MenuModel;
  19 }
  20
  21 namespace views {
  22 class ImageButton;
  23 class ImageView;
  24 class Label;
  25 class LabelButton;
  26 class Link;
  27 class LinkListener;
  28 class MenuButton;
  29 class MenuButtonListener;
  30 class MenuRunner;
  31 }  // namespace views
  32
  33 class InfoBarView : public InfoBar,
  34                     public views::View,
  35                     public views::ButtonListener,
  36                     public views::ExternalFocusTracker {
  37  public:
  38   explicit InfoBarView(scoped_ptr<InfoBarDelegate> delegate);
  39
  40   const SkPath& fill_path() const { return fill_path_; }
  41   const SkPath& stroke_path() const { return stroke_path_; }
  42
  43  protected:
  44   typedef std::vector<views::Label*> Labels;
  45
  46   static const int kButtonButtonSpacing;
  47   static const int kEndOfLabelSpacing;
  48
  49   virtual ~InfoBarView();
  50
  51   // Creates a label with the appropriate font and color for an infobar.
  52   views::Label* CreateLabel(const base::string16& text) const;
  53
  54   // Creates a link with the appropriate font and color for an infobar.
  55   // NOTE: Subclasses must ignore link clicks if we're unowned.
  56   views::Link* CreateLink(const base::string16& text,
  57                           views::LinkListener* listener) const;
  58
  59   // Creates a menu button with an infobar-specific appearance.
  60   // NOTE: Subclasses must ignore button presses if we're unowned.
  61   static views::MenuButton* CreateMenuButton(
  62       const base::string16& text,
  63       views::MenuButtonListener* menu_button_listener);
  64
  65   // Creates a button with an infobar-specific appearance.
  66   // NOTE: Subclasses must ignore button presses if we're unowned.
  67   static views::LabelButton* CreateLabelButton(views::ButtonListener* listener,
  68                                                const base::string16& text,
  69                                                bool needs_elevation);
  70
  71   // Given |labels| and the total |available_width| to display them in, sets
  72   // each label's size so that the longest label shrinks until it reaches the
  73   // length of the next-longest label, then both shrink until reaching the
  74   // length of the next-longest, and so forth.
  75   static void AssignWidths(Labels* labels, int available_width);
  76
  77   // views::View:
  78   virtual void Layout() OVERRIDE;
  79   virtual void ViewHierarchyChanged(
  80       const ViewHierarchyChangedDetails& details) OVERRIDE;
  81
  82   // views::ButtonListener:
  83   // NOTE: This must not be called if we're unowned.  (Subclasses should ignore
  84   // calls to ButtonPressed() in this case.)
  85   virtual void ButtonPressed(views::Button* sender,
  86                              const ui::Event& event) OVERRIDE;
  87
  88   // Returns the minimum width the content (that is, everything between the icon
  89   // and the close button) can be shrunk to.  This is used to prevent the close
  90   // button from overlapping views that cannot be shrunk any further.
  91   virtual int ContentMinimumWidth();
  92
  93   // These return x coordinates delimiting the usable area for subclasses to lay
  94   // out their controls.
  95   int StartX() const;
  96   int EndX() const;
  97
  98   // Given a |view|, returns the centered y position within us, taking into
  99   // account animation so the control "slides in" (or out) as we animate open
 100   // and closed.
 101   int OffsetY(views::View* view) const;
 102
 103   // Convenience getter.
 104   const InfoBarContainer::Delegate* container_delegate() const;
 105
 106   // Shows a menu at the specified position.
 107   // NOTE: This must not be called if we're unowned.  (Subclasses should ignore
 108   // calls to RunMenu() in this case.)
 109   void RunMenuAt(ui::MenuModel* menu_model,
 110                  views::MenuButton* button,
 111                  views::MenuItemView::AnchorPosition anchor);
 112
 113  private:
 114   static const int kHorizontalPadding;
 115   static const int kCloseButtonSpacing;
 116
 117   // Does the actual work for AssignWidths().  Assumes |labels| is sorted by
 118   // decreasing preferred width.
 119   static void AssignWidthsSorted(Labels* labels, int available_width);
 120
 121   // InfoBar:
 122   virtual void PlatformSpecificShow(bool animate) OVERRIDE;
 123   virtual void PlatformSpecificHide(bool animate) OVERRIDE;
 124   virtual void PlatformSpecificOnHeightsRecalculated() OVERRIDE;
 125
 126   // views::View:
 127   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
 128   virtual gfx::Size GetPreferredSize() OVERRIDE;
 129   virtual void PaintChildren(gfx::Canvas* canvas) OVERRIDE;
 130
 131   // views::ExternalFocusTracker:
 132   virtual void OnWillChangeFocus(View* focused_before,
 133                                  View* focused_now) OVERRIDE;
 134
 135   // The optional icon at the left edge of the InfoBar.
 136   views::ImageView* icon_;
 137
 138   // The close button at the right edge of the InfoBar.
 139   views::ImageButton* close_button_;
 140
 141   // The paths for the InfoBarBackground to draw, sized according to the heights
 142   // above.
 143   SkPath fill_path_;
 144   SkPath stroke_path_;
 145
 146   // Used to run the menu.
 147   scoped_ptr<views::MenuRunner> menu_runner_;
 148
 149   DISALLOW_COPY_AND_ASSIGN(InfoBarView);
 150 };
 151
 152 #endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_VIEW_H_