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// Copyright (c) 2010 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 "views/controls/menu/radio_button_image_gtk.h"
#include "gfx/canvas_skia.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
namespace {
// Size of the radio button inciator.
const int kSelectedIndicatorSize = 5;
const int kIndicatorSize = 10;
// Used for the radio indicator. See theme_draw for details.
const double kGradientStop = .5;
const SkColor kGradient0 = SkColorSetRGB(255, 255, 255);
const SkColor kGradient1 = SkColorSetRGB(255, 255, 255);
const SkColor kGradient2 = SkColorSetRGB(0xD8, 0xD8, 0xD8);
const SkColor kBaseStroke = SkColorSetRGB(0x8F, 0x8F, 0x8F);
const SkColor kRadioButtonIndicatorGradient0 = SkColorSetRGB(0, 0, 0);
const SkColor kRadioButtonIndicatorGradient1 = SkColorSetRGB(0x83, 0x83, 0x83);
const SkColor kIndicatorStroke = SkColorSetRGB(0, 0, 0);
SkBitmap* CreateRadioButtonImage(bool selected) {
// + 2 (1px on each side) to cover rounding error.
gfx::CanvasSkia canvas(kIndicatorSize + 2, kIndicatorSize + 2, false);
canvas.TranslateInt(1, 1);
SkPoint gradient_points[3];
gradient_points[0].set(SkIntToScalar(0), SkIntToScalar(0));
gradient_points[1].set(
SkIntToScalar(0),
SkIntToScalar(static_cast<int>(kIndicatorSize * kGradientStop)));
gradient_points[2].set(SkIntToScalar(0), SkIntToScalar(kIndicatorSize));
SkColor gradient_colors[3] = { kGradient0, kGradient1, kGradient2 };
SkShader* shader = SkGradientShader::CreateLinear(
gradient_points, gradient_colors, NULL, arraysize(gradient_points),
SkShader::kClamp_TileMode, NULL);
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
paint.setShader(shader);
shader->unref();
int radius = kIndicatorSize / 2;
canvas.drawCircle(radius, radius, radius, paint);
paint.setStrokeWidth(SkIntToScalar(0));
paint.setShader(NULL);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(kBaseStroke);
canvas.drawCircle(radius, radius, radius, paint);
if (selected) {
SkPoint selected_gradient_points[2];
selected_gradient_points[0].set(SkIntToScalar(0), SkIntToScalar(0));
selected_gradient_points[1].set(
SkIntToScalar(0),
SkIntToScalar(kSelectedIndicatorSize));
SkColor selected_gradient_colors[2] = { kRadioButtonIndicatorGradient0,
kRadioButtonIndicatorGradient1 };
shader = SkGradientShader::CreateLinear(
selected_gradient_points, selected_gradient_colors, NULL,
arraysize(selected_gradient_points), SkShader::kClamp_TileMode, NULL);
paint.setShader(shader);
shader->unref();
paint.setStyle(SkPaint::kFill_Style);
canvas.drawCircle(radius, radius,
kSelectedIndicatorSize / 2, paint);
paint.setStrokeWidth(SkIntToScalar(0));
paint.setShader(NULL);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(kIndicatorStroke);
canvas.drawCircle(radius, radius,
kSelectedIndicatorSize / 2, paint);
}
return new SkBitmap(canvas.ExtractBitmap());
}
} // namespace
namespace views {
const SkBitmap* GetRadioButtonImage(bool selected) {
static const SkBitmap* kRadioOn = CreateRadioButtonImage(true);
static const SkBitmap* kRadioOff = CreateRadioButtonImage(false);
return selected ? kRadioOn : kRadioOff;
}
} // namespace views;
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