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      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_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_VIEW_H_
      6 #define CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_VIEW_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "ui/views/context_menu_controller.h"
     11 #include "ui/views/controls/link_listener.h"
     12 #include "ui/views/view.h"
     13 
     14 class BookmarkBarInstructionsDelegate;
     15 
     16 namespace views {
     17 class Label;
     18 class Link;
     19 }
     20 
     21 // BookmarkBarInstructionsView is a child of the bookmark bar that is visible
     22 // when the user has no bookmarks on the bookmark bar.
     23 // BookmarkBarInstructionsView shows a description of the bookmarks bar along
     24 // with a link to import bookmarks. Clicking the link results in notifying the
     25 // delegate.
     26 class BookmarkBarInstructionsView : public views::View,
     27                                     public views::LinkListener,
     28                                     public views::ContextMenuController {
     29  public:
     30   explicit BookmarkBarInstructionsView(
     31       BookmarkBarInstructionsDelegate* delegate);
     32 
     33   // views::View overrides.
     34   virtual gfx::Size GetPreferredSize() const OVERRIDE;
     35   virtual void Layout() OVERRIDE;
     36   virtual void OnThemeChanged() OVERRIDE;
     37   virtual void ViewHierarchyChanged(
     38       const ViewHierarchyChangedDetails& details) OVERRIDE;
     39   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
     40 
     41   // views::LinkListener overrides.
     42   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
     43 
     44  private:
     45   virtual void ShowContextMenuForView(views::View* source,
     46                                       const gfx::Point& point,
     47                                       ui::MenuSourceType source_type) OVERRIDE;
     48 
     49   void UpdateColors();
     50 
     51   BookmarkBarInstructionsDelegate* delegate_;
     52 
     53   views::Label* instructions_;
     54   views::Link* import_link_;
     55 
     56   // The baseline of the child views. This is -1 if none of the views support a
     57   // baseline.
     58   int baseline_;
     59 
     60   // Have the colors of the child views been updated? This is initially false
     61   // and set to true once we have a valid ThemeProvider.
     62   bool updated_colors_;
     63 
     64   DISALLOW_COPY_AND_ASSIGN(BookmarkBarInstructionsView);
     65 };
     66 
     67 #endif  // CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_VIEW_H_
     68