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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/progress_bar.h"
#include <string>
#include "app/l10n_util.h"
#include "app/resource_bundle.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "gfx/canvas.h"
#include "gfx/color_utils.h"
#include "gfx/font.h"
#include "gfx/insets.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
#include "third_party/skia/include/effects/SkBlurMaskFilter.h"
#include "views/background.h"
#include "views/border.h"
#include "views/painter.h"
namespace {
// Corner radius for the progress bar's border.
const int kCornerRadius = 3;
// Progress bar's border width
const int kBorderWidth = 1;
static void AddRoundRectPath(int x, int y,
int w, int h,
int corner_radius,
SkPath* path) {
DCHECK(path);
if (path == NULL)
return;
SkScalar half = SkIntToScalar(1) / 2;
SkRect rect;
rect.set(
SkIntToScalar(x) + half, SkIntToScalar(y) + half,
SkIntToScalar(x + w) - half, SkIntToScalar(y + h) - half);
path->addRoundRect(
rect,
SkIntToScalar(corner_radius - half),
SkIntToScalar(corner_radius - half));
}
static void FillRoundRect(gfx::Canvas* canvas,
int x, int y,
int w, int h,
int corner_radius,
SkColor gradient_start_color,
SkColor gradient_end_color,
bool gradient_horizontal) {
SkPath path;
AddRoundRectPath(x, y, w, h, corner_radius, &path);
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setFlags(SkPaint::kAntiAlias_Flag);
if (gradient_start_color != gradient_end_color) {
SkPoint p[2];
p[0].set(SkIntToScalar(x), SkIntToScalar(y));
if (gradient_horizontal) {
p[1].set(SkIntToScalar(x + w), SkIntToScalar(y));
} else {
p[1].set(SkIntToScalar(x), SkIntToScalar(y + h));
}
SkColor colors[2] = { gradient_start_color, gradient_end_color };
SkShader* s = SkGradientShader::CreateLinear(
p, colors, NULL, 2, SkShader::kClamp_TileMode, NULL);
paint.setShader(s);
// Need to unref shader, otherwise never deleted.
s->unref();
} else {
paint.setColor(gradient_start_color);
}
canvas->drawPath(path, paint);
}
static void StrokeRoundRect(gfx::Canvas* canvas,
int x, int y,
int w, int h,
int corner_radius,
SkColor stroke_color,
int stroke_width) {
SkPath path;
AddRoundRectPath(x, y, w, h, corner_radius, &path);
SkPaint paint;
paint.setShader(NULL);
paint.setColor(stroke_color);
paint.setStyle(SkPaint::kStroke_Style);
paint.setFlags(SkPaint::kAntiAlias_Flag);
paint.setStrokeWidth(SkIntToScalar(stroke_width));
canvas->drawPath(path, paint);
}
} // anonymous namespace
namespace views {
// static
const char ProgressBar::kViewClassName[] = "views/ProgressBar";
// static: progress bar's maximum value.
const int ProgressBar::kMaxProgress = 100;
ProgressBar::ProgressBar(): progress_(0) {
}
ProgressBar::~ProgressBar() {
}
gfx::Size ProgressBar::GetPreferredSize() {
return gfx::Size(100, 16);
}
void ProgressBar::Paint(gfx::Canvas* canvas) {
SkColor bar_color_start = SkColorSetRGB(81, 138, 223);
SkColor bar_color_end = SkColorSetRGB(51, 103, 205);
SkColor background_color_start = SkColorSetRGB(212, 212, 212);
SkColor background_color_end = SkColorSetRGB(252, 252, 252);
SkColor border_color = SkColorSetRGB(144, 144, 144);
FillRoundRect(canvas,
0, 0, width(), height(),
kCornerRadius,
background_color_start,
background_color_end,
false);
if (progress_ * width() > 1) {
FillRoundRect(canvas,
0, 0,
progress_ * width() / kMaxProgress, height(),
kCornerRadius,
bar_color_start,
bar_color_end,
false);
}
StrokeRoundRect(canvas,
0, 0,
width(), height(),
kCornerRadius,
border_color,
kBorderWidth);
}
std::string ProgressBar::GetClassName() const {
return kViewClassName;
}
void ProgressBar::SetProgress(int progress) {
progress_ = progress;
if (progress_ < 0)
progress_ = 0;
else if (progress_ > kMaxProgress)
progress_ = kMaxProgress;
SchedulePaint();
}
int ProgressBar::GetProgress() const {
return progress_;
}
void ProgressBar::AddProgress(int tick) {
SetProgress(progress_ + tick);
}
void ProgressBar::SetTooltipText(const std::wstring& tooltip_text) {
tooltip_text_ = tooltip_text;
}
bool ProgressBar::GetTooltipText(const gfx::Point& p, std::wstring* tooltip) {
DCHECK(tooltip);
if (tooltip == NULL)
return false;
tooltip->assign(tooltip_text_);
return !tooltip_text_.empty();
}
void ProgressBar::SetEnabled(bool enabled) {
if (enabled == enabled_)
return;
View::SetEnabled(enabled);
// TODO(denisromanov): Need to switch progress bar color here?
}
bool ProgressBar::GetAccessibleRole(AccessibilityTypes::Role* role) {
DCHECK(role);
if (role == NULL)
return false;
*role = AccessibilityTypes::ROLE_TEXT;
return true;
}
bool ProgressBar::GetAccessibleName(std::wstring* name) {
DCHECK(name);
if (name == NULL)
return false;
if (!accessible_name_.empty()) {
*name = accessible_name_;
return true;
}
return false;
}
bool ProgressBar::GetAccessibleState(AccessibilityTypes::State* state) {
DCHECK(state);
if (state == NULL)
return false;
*state = AccessibilityTypes::STATE_READONLY;
return true;
}
void ProgressBar::SetAccessibleName(const std::wstring& name) {
accessible_name_.assign(name);
}
} // namespace views
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