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+// Copyright (c) 2006-2008 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_BACKGROUND_H_
+#define VIEWS_BACKGROUND_H_
+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif // defined(OS_WIN)
+
+#include "base/basictypes.h"
+#include "skia/include/SkColor.h"
+
+class ChromeCanvas;
+
+namespace views {
+
+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);
+
+#if defined(OS_WIN)
+ // TODO(port): Make GetNativeControlBrush portable (currently uses HBRUSH).
+
+ // Get the brush that was specified by SetNativeControlColor
+ HBRUSH GetNativeControlBrush() const { return native_control_brush_; };
+#endif // defined(OS_WIN)
+
+ private:
+#if defined(OS_WIN)
+ // TODO(port): Create portable replacement for HBRUSH.
+ HBRUSH native_control_brush_;
+#endif // defined(OS_WIN)
+ DISALLOW_COPY_AND_ASSIGN(Background);
+};
+
+} // namespace views
+
+#endif // VIEWS_BACKGROUND_H_