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// Copyright 2014 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 "athena/wm/overview_toolbar.h"
#include "athena/resources/grit/athena_resources.h"
#include "base/bind.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "ui/aura/window.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/compositor/closure_animation_observer.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_delegate.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/events/event.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/transform.h"
namespace {
const int kActionButtonImageSize = 54;
const int kActionButtonTextSize = 20;
const int kActionButtonPaddingFromRight = 32;
}
namespace athena {
class ActionButton : public ui::LayerDelegate {
public:
ActionButton(int resource_id, const std::string& label)
: resource_id_(resource_id), label_(base::UTF8ToUTF16(label)) {
layer_.reset(new ui::Layer(ui::LAYER_TEXTURED));
layer_->set_delegate(this);
layer_->SetFillsBoundsOpaquely(false);
layer_->SetVisible(true);
layer_->SetOpacity(0);
}
virtual ~ActionButton() {}
static void DestroyAfterFadeout(scoped_ptr<ActionButton> button) {
ui::Layer* layer = button->layer();
ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());
settings.AddObserver(new ui::ClosureAnimationObserver(
base::Bind(&ActionButton::DestroyImmediately, base::Passed(&button))));
layer->SetOpacity(0);
}
void SetPosition(const gfx::Point& position) {
layer_->SetBounds(
gfx::Rect(position,
gfx::Size(kActionButtonImageSize,
kActionButtonImageSize + kActionButtonTextSize)));
}
ui::Layer* layer() { return layer_.get(); }
private:
static void DestroyImmediately(scoped_ptr<ActionButton> button) {
button.reset();
}
// ui::LayerDelegate:
virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE {
ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
canvas->DrawImageInt(*bundle.GetImageSkiaNamed(resource_id_), 0, 0);
gfx::ShadowValues shadow;
shadow.push_back(gfx::ShadowValue(gfx::Point(0, 1), 2, SK_ColorBLACK));
shadow.push_back(gfx::ShadowValue(gfx::Point(0, -1), 2, SK_ColorBLACK));
canvas->DrawStringRectWithShadows(label_,
gfx::FontList(),
SK_ColorWHITE,
gfx::Rect(0,
kActionButtonImageSize,
kActionButtonImageSize,
kActionButtonTextSize),
0,
gfx::Canvas::TEXT_ALIGN_CENTER,
shadow);
}
virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE {
return base::Closure();
}
int resource_id_;
base::string16 label_;
scoped_ptr<ui::Layer> layer_;
DISALLOW_COPY_AND_ASSIGN(ActionButton);
};
OverviewToolbar::OverviewToolbar(aura::Window* container)
: shown_(false),
close_(new ActionButton(IDR_ATHENA_OVERVIEW_TRASH, "Close")),
split_(new ActionButton(IDR_ATHENA_OVERVIEW_SPLIT, "Split")),
current_action_(ACTION_TYPE_NONE),
container_bounds_(container->bounds()) {
const int kPaddingFromBottom = 200;
const int kPaddingBetweenButtons = 200;
int x = container_bounds_.right() -
(kActionButtonPaddingFromRight + kActionButtonImageSize);
int y = container_bounds_.bottom() -
(kPaddingFromBottom + kActionButtonImageSize);
split_->SetPosition(gfx::Point(x, y));
y -= kPaddingBetweenButtons;
close_->SetPosition(gfx::Point(x, y));
container->layer()->Add(split_->layer());
container->layer()->Add(close_->layer());
}
OverviewToolbar::~OverviewToolbar() {
// If the buttons are visible, then fade them out, instead of destroying them
// immediately.
if (shown_) {
ActionButton::DestroyAfterFadeout(split_.Pass());
ActionButton::DestroyAfterFadeout(close_.Pass());
}
}
OverviewToolbar::ActionType OverviewToolbar::GetHighlightAction(
const ui::GestureEvent& event) const {
if (IsEventOverButton(split_.get(), event))
return ACTION_TYPE_SPLIT;
if (IsEventOverButton(close_.get(), event))
return ACTION_TYPE_CLOSE;
return ACTION_TYPE_NONE;
}
void OverviewToolbar::SetHighlightAction(ActionType action) {
if (current_action_ == action)
return;
current_action_ = action;
if (!shown_) {
ShowActionButtons();
} else {
TransformButton(close_.get());
TransformButton(split_.get());
}
}
void OverviewToolbar::ShowActionButtons() {
if (!shown_)
ToggleActionButtonsVisibility();
}
void OverviewToolbar::HideActionButtons() {
if (shown_)
ToggleActionButtonsVisibility();
}
void OverviewToolbar::ToggleActionButtonsVisibility() {
shown_ = !shown_;
TransformButton(close_.get());
TransformButton(split_.get());
}
bool OverviewToolbar::IsEventOverButton(ActionButton* button,
const ui::GestureEvent& event) const {
const int kBoundsInsetForTarget = 30;
gfx::RectF bounds = button->layer()->bounds();
bounds.Inset(-kBoundsInsetForTarget, -kBoundsInsetForTarget);
return bounds.Contains(event.location());
}
gfx::Transform OverviewToolbar::ComputeTransformFor(
ActionButton* button) const {
if (!shown_)
return gfx::Transform();
const float kHighlightScale = 1.5;
bool button_is_highlighted =
(current_action_ == ACTION_TYPE_CLOSE && button == close_.get()) ||
(current_action_ == ACTION_TYPE_SPLIT && button == split_.get());
gfx::Transform transform;
if (button_is_highlighted) {
transform.Translate(-kActionButtonImageSize * (kHighlightScale - 1) / 2, 0);
transform.Scale(kHighlightScale, kHighlightScale);
}
return transform;
}
void OverviewToolbar::TransformButton(ActionButton* button) {
ui::ScopedLayerAnimationSettings split_settings(
button->layer()->GetAnimator());
split_settings.SetTweenType(gfx::Tween::SMOOTH_IN_OUT);
button->layer()->SetTransform(ComputeTransformFor(button));
button->layer()->SetOpacity(shown_ ? 1 : 0);
}
} // namespace athena
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