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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.
+
+#include "chrome/common/gfx/chrome_canvas.h"
+#include "chrome/views/background.h"
+#include "chrome/views/painter.h"
+#include "chrome/views/view.h"
+#include "skia/include/SkPaint.h"
+#include "base/gfx/skia_utils.h"
+
+namespace ChromeViews {
+
+// SolidBackground is a trivial Background implementation that fills the
+// background in a solid color.
+class SolidBackground : public Background {
+ public:
+ explicit SolidBackground(const SkColor& color) :
+ color_(color) {
+ SetNativeControlColor(color_);
+ }
+
+ void Paint(ChromeCanvas* canvas, View* view) const {
+ // Fill the background. Note that we don't constrain to the bounds as
+ // canvas is already clipped for us.
+ canvas->drawColor(color_);
+ }
+
+ private:
+ const SkColor color_;
+
+ DISALLOW_EVIL_CONSTRUCTORS(SolidBackground);
+};
+
+class BackgroundPainter : public ChromeViews::Background {
+ public:
+ BackgroundPainter(bool owns_painter, Painter* painter)
+ : owns_painter_(owns_painter), painter_(painter) {
+ DCHECK(painter);
+ }
+
+ virtual ~BackgroundPainter() {
+ if (owns_painter_)
+ delete painter_;
+ }
+
+
+ void Paint(ChromeCanvas* canvas, View* view) const {
+ Painter::PaintPainterAt(0, 0, view->GetWidth(), view->GetHeight(), canvas,
+ painter_);
+ }
+
+ private:
+ bool owns_painter_;
+ Painter* painter_;
+
+ DISALLOW_EVIL_CONSTRUCTORS(BackgroundPainter);
+};
+
+Background::Background() : native_control_brush_(NULL) {
+}
+
+Background::~Background() {
+ DeleteObject(native_control_brush_);
+}
+
+void Background::SetNativeControlColor(SkColor color) {
+ DeleteObject(native_control_brush_);
+ native_control_brush_ = CreateSolidBrush(gfx::SkColorToCOLORREF(color));
+}
+
+//static
+Background* Background::CreateSolidBackground(const SkColor& color) {
+ return new SolidBackground(color);
+}
+
+//static
+Background* Background::CreateStandardPanelBackground() {
+ return CreateVerticalGradientBackground(SkColorSetRGB(246, 250, 255),
+ SkColorSetRGB(219, 235, 255));
+}
+
+//static
+Background* Background::CreateVerticalGradientBackground(
+ const SkColor& color1, const SkColor& color2) {
+ Background *background =
+ CreateBackgroundPainter(true, Painter::CreateVerticalGradient(color1,
+ color2));
+ background->SetNativeControlColor( // 50% blend of colors 1 & 2
+ SkColorSetRGB((SkColorGetR(color1) + SkColorGetR(color2)) / 2,
+ (SkColorGetG(color1) + SkColorGetG(color2)) / 2,
+ (SkColorGetB(color1) + SkColorGetB(color2)) / 2));
+
+ return background;
+}
+
+//static
+Background* Background::CreateBackgroundPainter(bool owns_painter,
+ Painter* painter) {
+ return new BackgroundPainter(owns_painter, painter);
+}
+
+}