ui/views/controls/scrollbar/native_scroll_bar_views.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 UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
   6 #define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "ui/gfx/point.h"
  10 #include "ui/native_theme/native_theme.h"
  11 #include "ui/views/controls/button/button.h"
  12 #include "ui/views/controls/scrollbar/base_scroll_bar.h"
  13 #include "ui/views/controls/scrollbar/native_scroll_bar_wrapper.h"
  14 #include "ui/views/view.h"
  15
  16 namespace gfx {
  17 class Canvas;
  18 }
  19
  20 namespace views {
  21
  22 class NativeScrollBar;
  23
  24 // Views implementation for the scrollbar.
  25 class VIEWS_EXPORT NativeScrollBarViews : public BaseScrollBar,
  26                                           public ButtonListener,
  27                                           public NativeScrollBarWrapper {
  28  public:
  29   static const char kViewClassName[];
  30
  31   // Creates new scrollbar, either horizontal or vertical.
  32   explicit NativeScrollBarViews(NativeScrollBar* native_scroll_bar);
  33   virtual ~NativeScrollBarViews();
  34
  35  private:
  36   // View overrides:
  37   virtual void Layout() OVERRIDE;
  38   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
  39   virtual gfx::Size GetPreferredSize() const OVERRIDE;
  40   virtual const char* GetClassName() const OVERRIDE;
  41
  42   // ScrollBar overrides:
  43   virtual int GetLayoutSize() const OVERRIDE;
  44
  45   // BaseScrollBar overrides:
  46   virtual void ScrollToPosition(int position) OVERRIDE;
  47   virtual int GetScrollIncrement(bool is_page, bool is_positive) OVERRIDE;
  48
  49   // BaseButton::ButtonListener overrides:
  50   virtual void ButtonPressed(Button* sender,
  51                              const ui::Event& event) OVERRIDE;
  52
  53   // NativeScrollBarWrapper overrides:
  54   virtual int GetPosition() const OVERRIDE;
  55   virtual View* GetView() OVERRIDE;
  56   virtual void Update(int viewport_size,
  57                       int content_size,
  58                       int current_pos) OVERRIDE;
  59
  60   // Returns the area for the track. This is the area of the scrollbar minus
  61   // the size of the arrow buttons.
  62   virtual gfx::Rect GetTrackBounds() const OVERRIDE;
  63
  64   // The NativeScrollBar we are bound to.
  65   NativeScrollBar* native_scroll_bar_;
  66
  67   // The scroll bar buttons (Up/Down, Left/Right).
  68   Button* prev_button_;
  69   Button* next_button_;
  70
  71   ui::NativeTheme::ExtraParams params_;
  72   ui::NativeTheme::Part part_;
  73   ui::NativeTheme::State state_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(NativeScrollBarViews);
  76 };
  77
  78 }  // namespace views
  79
  80 #endif  // UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_