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// 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.
#include "chrome/views/throbber.h"
#include "chrome/app/theme/theme_resources.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/common/logging_chrome.h"
#include "chrome/common/resource_bundle.h"
#include "skia/include/SkBitmap.h"
namespace views {
Throbber::Throbber(int frame_time_ms,
bool paint_while_stopped)
: paint_while_stopped_(paint_while_stopped),
running_(false),
last_frame_drawn_(-1),
frame_time_ms_(frame_time_ms),
frames_(NULL),
last_time_recorded_(0) {
ResourceBundle &rb = ResourceBundle::GetSharedInstance();
frames_ = rb.GetBitmapNamed(IDR_THROBBER);
DCHECK(frames_->width() > 0 && frames_->height() > 0);
DCHECK(frames_->width() % frames_->height() == 0);
frame_count_ = frames_->width() / frames_->height();
}
Throbber::~Throbber() {
Stop();
}
void Throbber::Start() {
if (running_)
return;
start_time_ = GetTickCount();
last_time_recorded_ = start_time_;
timer_.Start(
TimeDelta::FromMilliseconds(frame_time_ms_ - 10), this, &Throbber::Run);
running_ = true;
SchedulePaint(); // paint right away
}
void Throbber::Stop() {
if (!running_)
return;
timer_.Stop();
running_ = false;
SchedulePaint(); // Important if we're not painting while stopped
}
void Throbber::Run() {
DCHECK(running_);
SchedulePaint();
}
gfx::Size Throbber::GetPreferredSize() {
return gfx::Size(frames_->height(), frames_->height());
}
void Throbber::Paint(ChromeCanvas* canvas) {
if (!running_ && !paint_while_stopped_)
return;
DWORD current_time = GetTickCount();
int current_frame = 0;
// deal with timer wraparound
if (current_time < last_time_recorded_) {
start_time_ = current_time;
current_frame = (last_frame_drawn_ + 1) % frame_count_;
} else {
current_frame =
((current_time - start_time_) / frame_time_ms_) % frame_count_;
}
last_time_recorded_ = current_time;
last_frame_drawn_ = current_frame;
int image_size = frames_->height();
int image_offset = current_frame * image_size;
canvas->DrawBitmapInt(*frames_,
image_offset, 0, image_size, image_size,
0, 0, image_size, image_size,
false);
}
// Smoothed throbber ---------------------------------------------------------
// Delay after work starts before starting throbber, in milliseconds.
static const int kStartDelay = 200;
// Delay after work stops before stopping, in milliseconds.
static const int kStopDelay = 50;
SmoothedThrobber::SmoothedThrobber(int frame_time_ms)
: Throbber(frame_time_ms, /* paint_while_stopped= */ false) {
}
void SmoothedThrobber::Start() {
stop_timer_.Stop();
if (!running_ && !start_timer_.IsRunning()) {
start_timer_.Start(TimeDelta::FromMilliseconds(kStartDelay), this,
&SmoothedThrobber::StartDelayOver);
}
}
void SmoothedThrobber::StartDelayOver() {
Throbber::Start();
}
void SmoothedThrobber::Stop() {
if (!running_)
start_timer_.Stop();
stop_timer_.Stop();
stop_timer_.Start(TimeDelta::FromMilliseconds(kStopDelay), this,
&SmoothedThrobber::StopDelayOver);
}
void SmoothedThrobber::StopDelayOver() {
Throbber::Stop();
}
// Checkmark throbber ---------------------------------------------------------
CheckmarkThrobber::CheckmarkThrobber()
: checked_(false),
Throbber(kFrameTimeMs, false) {
InitClass();
}
void CheckmarkThrobber::SetChecked(bool checked) {
bool changed = checked != checked_;
if (changed) {
checked_ = checked;
SchedulePaint();
}
}
void CheckmarkThrobber::Paint(ChromeCanvas* canvas) {
if (running_) {
// Let the throbber throb...
Throbber::Paint(canvas);
return;
}
// Otherwise we paint our tick mark or nothing depending on our state.
if (checked_) {
int checkmark_x = (width() - checkmark_->width()) / 2;
int checkmark_y = (height() - checkmark_->height()) / 2;
canvas->DrawBitmapInt(*checkmark_, checkmark_x, checkmark_y);
}
}
// static
void CheckmarkThrobber::InitClass() {
static bool initialized = false;
if (!initialized) {
ResourceBundle& rb = ResourceBundle::GetSharedInstance();
checkmark_ = rb.GetBitmapNamed(IDR_INPUT_GOOD);
initialized = true;
}
}
// static
SkBitmap* CheckmarkThrobber::checkmark_ = NULL;
} // namespace views
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