This source file includes following definitions.
- opacity_scale_
- SetAnimationContainer
- SetLocation
- Show
- Hide
- HideImmediately
- GetAnimationValue
- ShouldDraw
- Draw
- AnimationEnded
- AnimationProgressed
#include "ui/views/controls/glow_hover_controller.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/image/image_skia_operations.h"
#include "ui/views/view.h"
namespace views {
static const double kTrackOpacityScale = 0.5;
static const double kHighlightOpacityScale = 1.0;
static const int kTrackHoverDurationMs = 400;
GlowHoverController::GlowHoverController(views::View* view)
: view_(view),
animation_(this),
opacity_scale_(kTrackOpacityScale) {
animation_.set_delegate(this);
}
GlowHoverController::~GlowHoverController() {
}
void GlowHoverController::SetAnimationContainer(
gfx::AnimationContainer* container) {
animation_.SetContainer(container);
}
void GlowHoverController::SetLocation(const gfx::Point& location) {
location_ = location;
if (ShouldDraw())
view_->SchedulePaint();
}
void GlowHoverController::Show(Style style) {
switch (style) {
case SUBTLE:
opacity_scale_ = kTrackOpacityScale;
animation_.SetSlideDuration(kTrackHoverDurationMs);
animation_.SetTweenType(gfx::Tween::EASE_OUT);
animation_.Show();
break;
case PRONOUNCED:
opacity_scale_ = kHighlightOpacityScale;
animation_.Show();
animation_.End();
break;
}
}
void GlowHoverController::Hide() {
animation_.SetTweenType(gfx::Tween::EASE_IN);
animation_.Hide();
}
void GlowHoverController::HideImmediately() {
if (ShouldDraw())
view_->SchedulePaint();
animation_.Reset();
}
double GlowHoverController::GetAnimationValue() const {
return animation_.GetCurrentValue();
}
bool GlowHoverController::ShouldDraw() const {
return animation_.IsShowing() || animation_.is_animating();
}
void GlowHoverController::Draw(gfx::Canvas* canvas,
const gfx::ImageSkia& mask_image) const {
if (!ShouldDraw())
return;
gfx::Canvas hover_canvas(gfx::Size(mask_image.width(), mask_image.height()),
canvas->image_scale(),
false);
int radius = view_->width() / 3;
SkPoint center_point;
center_point.iset(location_.x(), location_.y());
SkColor colors[2];
int hover_alpha =
static_cast<int>(255 * opacity_scale_ * animation_.GetCurrentValue());
colors[0] = SkColorSetARGB(hover_alpha, 255, 255, 255);
colors[1] = SkColorSetARGB(0, 255, 255, 255);
skia::RefPtr<SkShader> shader = skia::AdoptRef(
SkGradientShader::CreateRadial(
center_point, SkIntToScalar(radius), colors, NULL, 2,
SkShader::kClamp_TileMode));
if (shader) {
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
paint.setShader(shader.get());
hover_canvas.DrawRect(gfx::Rect(location_.x() - radius,
location_.y() - radius,
radius * 2, radius * 2), paint);
}
gfx::ImageSkia result = gfx::ImageSkiaOperations::CreateMaskedImage(
gfx::ImageSkia(hover_canvas.ExtractImageRep()), mask_image);
canvas->DrawImageInt(result, (view_->width() - mask_image.width()) / 2,
(view_->height() - mask_image.height()) / 2);
}
void GlowHoverController::AnimationEnded(const gfx::Animation* animation) {
view_->SchedulePaint();
}
void GlowHoverController::AnimationProgressed(const gfx::Animation* animation) {
view_->SchedulePaint();
}
}