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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_GTK_H_
#define VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_GTK_H_
#pragma once
#include "views/controls/native_control_gtk.h"
#include "views/controls/scrollbar/native_scroll_bar_wrapper.h"
namespace views {
class ScrollBarContainer;
/////////////////////////////////////////////////////////////////////////////
//
// NativeScrollBarGtk
//
// A View subclass that wraps a Native gtk scrollbar control.
//
// A scrollbar is either horizontal or vertical.
//
/////////////////////////////////////////////////////////////////////////////
class NativeScrollBarGtk : public NativeControlGtk,
public NativeScrollBarWrapper {
public:
// Creates new scrollbar, either horizontal or vertical.
explicit NativeScrollBarGtk(NativeScrollBar* native_scroll_bar);
virtual ~NativeScrollBarGtk();
private:
// Overridden from View for layout purpose.
virtual void Layout();
virtual gfx::Size GetPreferredSize();
// Overridden from View for keyboard UI purpose.
virtual bool OnKeyPressed(const KeyEvent& event);
virtual bool OnMouseWheel(const MouseWheelEvent& e);
// Overridden from NativeControlGtk.
virtual void CreateNativeControl();
// Overridden from NativeScrollBarWrapper.
virtual int GetPosition() const;
virtual View* GetView();
virtual void Update(int viewport_size, int content_size, int current_pos);
// Moves the scrollbar by the given value. Negative value is allowed.
// (moves upward)
void MoveBy(int o);
// Moves the scrollbar by the page (viewport) size.
void MovePage(bool positive);
// Moves the scrollbar by predefined step size.
void MoveStep(bool positive);
// Moves the scrollbar to the given position. MoveTo(0) moves it to the top.
void MoveTo(int p);
// Moves the scrollbar to the end.
void MoveToBottom();
// Invoked when the scrollbar's position is changed.
void ValueChanged();
static void CallValueChanged(GtkWidget* widget,
NativeScrollBarGtk* scroll_bar);
// The NativeScrollBar we are bound to.
NativeScrollBar* native_scroll_bar_;
private:
DISALLOW_COPY_AND_ASSIGN(NativeScrollBarGtk);
};
} // namespace views
#endif // #ifndef VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_GTK_H_
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