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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_VIEWS_BACKGROUND_H__
#define CHROME_VIEWS_BACKGROUND_H__
#include <windows.h>
#include "base/basictypes.h"
#include "SkColor.h"
class ChromeCanvas;
namespace ChromeViews {
class Painter;
class View;
/////////////////////////////////////////////////////////////////////////////
//
// Background class
//
// A background implements a way for views to paint a background. The
// background can be either solid or based on a gradient. Of course,
// Background can be subclassed to implement various effects.
//
// Any View can have a background. See View::SetBackground() and
// View::PaintBackground()
//
/////////////////////////////////////////////////////////////////////////////
class Background {
public:
Background();
virtual ~Background();
// Creates a background that fills the canvas in the specified color.
static Background* CreateSolidBackground(const SkColor& color);
// Creates a background that fills the canvas in the specified color.
static Background* CreateSolidBackground(int r, int g, int b) {
return CreateSolidBackground(SkColorSetRGB(r, g, b));
}
// Creates a background that fills the canvas in the specified color.
static Background* CreateSolidBackground(int r, int g, int b, int a) {
return CreateSolidBackground(SkColorSetARGB(a, r, g, b));
}
// Creates a background that contains a vertical gradient that varies
// from |color1| to |color2|
static Background* CreateVerticalGradientBackground(const SkColor& color1,
const SkColor& color2);
// Creates Chrome's standard panel background
static Background* CreateStandardPanelBackground();
// Creates a Background from the specified Painter. If owns_painter is
// true, the Painter is deleted when the Border is deleted.
static Background* CreateBackgroundPainter(bool owns_painter,
Painter* painter);
// Render the background for the provided view
virtual void Paint(ChromeCanvas* canvas, View* view) const = 0;
// Set a solid, opaque color to be used when drawing backgrounds of native
// controls. Unfortunately alpha=0 is not an option.
void SetNativeControlColor(SkColor color);
// Get the brush that was specified by SetNativeControlColor
HBRUSH GetNativeControlBrush() const { return native_control_brush_; };
private:
HBRUSH native_control_brush_;
DISALLOW_EVIL_CONSTRUCTORS(Background);
};
}
#endif // CHROME_VIEWS_BACKGROUND_H__
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