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Diffstat (limited to 'views/background.h')
-rw-r--r-- | views/background.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/views/background.h b/views/background.h new file mode 100644 index 0000000..acc3948 --- /dev/null +++ b/views/background.h @@ -0,0 +1,91 @@ +// 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_ |