| // 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 "third_party/skia/include/core/SkColor.h" |
| |
| namespace gfx { |
| class Canvas; |
| } |
| |
| 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(gfx::Canvas* 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_ |