It is time.

ui/views/background.cc

-// Copyright (c) 2012 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.
-
-#include "ui/views/background.h"
-
-#include "base/logging.h"
-#include "skia/ext/skia_utils_win.h"
-#include "third_party/skia/include/core/SkPaint.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/views/painter.h"
-#include "ui/views/view.h"
-
-namespace views {
-
-// SolidBackground is a trivial Background implementation that fills the
-// background in a solid color.
-class SolidBackground : public Background {
- public:
-  explicit SolidBackground(SkColor color) {
-    SetNativeControlColor(color);
-  }
-
-  virtual void Paint(gfx::Canvas* canvas, View* view) const override {
-    // Fill the background. Note that we don't constrain to the bounds as
-    // canvas is already clipped for us.
-    canvas->DrawColor(get_color());
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SolidBackground);
-};
-
-class BackgroundPainter : public Background {
- public:
-  BackgroundPainter(bool owns_painter, Painter* painter)
-      : owns_painter_(owns_painter), painter_(painter) {
-    DCHECK(painter);
-  }
-
-  virtual ~BackgroundPainter() {
-    if (owns_painter_)
-      delete painter_;
-  }
-
-
-  virtual void Paint(gfx::Canvas* canvas, View* view) const override {
-    Painter::PaintPainterAt(canvas, painter_, view->GetLocalBounds());
-  }
-
- private:
-  bool owns_painter_;
-  Painter* painter_;
-
-  DISALLOW_COPY_AND_ASSIGN(BackgroundPainter);
-};
-
-Background::Background()
-    : color_(SK_ColorWHITE)
-#if defined(OS_WIN)
-    , native_control_brush_(NULL)
-#endif
-{
-}
-
-Background::~Background() {
-#if defined(OS_WIN)
-  DeleteObject(native_control_brush_);
-#endif
-}
-
-void Background::SetNativeControlColor(SkColor color) {
-  color_ = color;
-#if defined(OS_WIN)
-  DeleteObject(native_control_brush_);
-  native_control_brush_ = NULL;
-#endif
-}
-
-#if defined(OS_WIN)
-HBRUSH Background::GetNativeControlBrush() const {
-  if (!native_control_brush_)
-    native_control_brush_ = CreateSolidBrush(skia::SkColorToCOLORREF(color_));
-  return native_control_brush_;
-}
-#endif
-
-//static
-Background* Background::CreateSolidBackground(SkColor color) {
-  return new SolidBackground(color);
-}
-
-//static
-Background* Background::CreateStandardPanelBackground() {
-  // TODO(beng): Should be in NativeTheme.
-  return CreateSolidBackground(SK_ColorWHITE);
-}
-
-//static
-Background* Background::CreateVerticalGradientBackground(SkColor color1,
-                                                         SkColor color2) {
-  Background* background = CreateBackgroundPainter(
-      true, Painter::CreateVerticalGradient(color1, color2));
-  background->SetNativeControlColor(
-      color_utils::AlphaBlend(color1, color2, 128));
-
-  return background;
-}
-
-//static
-Background* Background::CreateVerticalMultiColorGradientBackground(
-    SkColor* colors,
-    SkScalar* pos,
-    size_t count) {
-  Background* background = CreateBackgroundPainter(
-      true, Painter::CreateVerticalMultiColorGradient(colors, pos, count));
-  background->SetNativeControlColor(
-      color_utils::AlphaBlend(colors[0], colors[count-1], 128));
-
-  return background;
-}
-
-//static
-Background* Background::CreateBackgroundPainter(bool owns_painter,
-                                                Painter* painter) {
-  return new BackgroundPainter(owns_painter, painter);
-}
-
-}  // namespace views