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// Copyright (c) 2011 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 CHROME_BROWSER_UI_VIEWS_DROPDOWN_BAR_VIEW_H_
#define CHROME_BROWSER_UI_VIEWS_DROPDOWN_BAR_VIEW_H_
#pragma once
#include "chrome/browser/ui/views/dropdown_bar_host.h"
#include "chrome/browser/ui/views/dropdown_bar_host_delegate.h"
#include "chrome/browser/ui/views/accessible_pane_view.h"
namespace gfx {
class Canvas;
} // namespace gfx
////////////////////////////////////////////////////////////////////////////////
//
// The DropdownBarView is an abstract view to draw the UI controls of the
// DropdownBarHost.
//
////////////////////////////////////////////////////////////////////////////////
class DropdownBarView : public AccessiblePaneView,
public DropdownBarHostDelegate {
public:
explicit DropdownBarView(DropdownBarHost* host);
virtual ~DropdownBarView();
// Updates the view to let it know where the host is clipping the
// dropdown widget (while animating the opening or closing of the widget).
virtual void SetAnimationOffset(int offset) OVERRIDE;
// Returns the offset used while animating.
int animation_offset() const { return animation_offset_; }
protected:
// Returns the DropdownBarHost that manages this view.
DropdownBarHost* host() const { return host_; }
// Assign border bitmaps for this drop down instance.
void SetDialogBorderBitmaps(const SkBitmap* dialog_left,
const SkBitmap* dialog_middle,
const SkBitmap* dialog_right);
// Paints the offset toolbar background over the widget area and returns the
// bounds of the widget.
gfx::Rect PaintOffsetToolbarBackground(gfx::Canvas* canvas);
// Paint the border for the drop down dialog given the ends and middle
// bitmaps.
void PaintDialogBorder(gfx::Canvas* canvas, const gfx::Rect& bounds) const;
// Special paint code for the edges when the drop down bar is animating.
void PaintAnimatingEdges(gfx::Canvas* canvas, const gfx::Rect& bounds) const;
private:
// The dropdown bar host that controls this view.
DropdownBarHost* host_;
// While animating, the host clips the widget and draws only the bottom
// part of it. The view needs to know the pixel offset at which we are drawing
// the widget so that we can draw the curved edges that attach to the toolbar
// in the right location.
int animation_offset_;
// The dialog border bitmaps.
const SkBitmap* dialog_left_;
const SkBitmap* dialog_middle_;
const SkBitmap* dialog_right_;
DISALLOW_COPY_AND_ASSIGN(DropdownBarView);
};
#endif // CHROME_BROWSER_UI_VIEWS_DROPDOWN_BAR_VIEW_H_
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