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// Copyright 2013 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.
#ifndef ASH_SHELF_SHELF_BUTTON_H_
#define ASH_SHELF_SHELF_BUTTON_H_
#include "ash/ash_export.h"
#include "base/macros.h"
#include "base/timer/timer.h"
#include "ui/gfx/shadow_value.h"
#include "ui/views/controls/button/button.h"
namespace views {
class ImageView;
}
namespace ash {
class InkDropButtonListener;
class ShelfView;
// Button used for items on the launcher, except for the AppList.
class ASH_EXPORT ShelfButton : public views::Button {
public:
static const char kViewClassName[];
// Used to indicate the current state of the button.
enum State {
// Nothing special. Usually represents an app shortcut item with no running
// instance.
STATE_NORMAL = 0,
// Button has mouse hovering on it.
STATE_HOVERED = 1 << 0,
// Underlying ShelfItem has a running instance.
STATE_RUNNING = 1 << 1,
// Underlying ShelfItem needs user's attention.
STATE_ATTENTION = 1 << 2,
// Hide the status (temporarily for some animations).
STATE_HIDDEN = 1 << 3,
// Button is being dragged.
STATE_DRAGGING = 1 << 4,
};
ShelfButton(InkDropButtonListener* listener, ShelfView* shelf_view);
~ShelfButton() override;
// Sets the image to display for this entry.
void SetImage(const gfx::ImageSkia& image);
// Retrieve the image to show proxy operations.
const gfx::ImageSkia& GetImage() const;
// |state| is or'd into the current state.
void AddState(State state);
void ClearState(State state);
int state() const { return state_; }
// Returns the bounds of the icon.
gfx::Rect GetIconBounds() const;
views::InkDrop* GetInkDropForTesting();
// Called when user started dragging the shelf button.
void OnDragStarted(const ui::LocatedEvent* event);
// Overrides to views::Button:
void ShowContextMenu(const gfx::Point& p,
ui::MenuSourceType source_type) override;
// View override - needed by unit test.
void OnMouseCaptureLost() override;
protected:
// View overrides:
const char* GetClassName() const override;
bool OnMousePressed(const ui::MouseEvent& event) override;
void OnMouseReleased(const ui::MouseEvent& event) override;
bool OnMouseDragged(const ui::MouseEvent& event) override;
void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
void Layout() override;
void ChildPreferredSizeChanged(views::View* child) override;
// ui::EventHandler overrides:
void OnGestureEvent(ui::GestureEvent* event) override;
// views::Button overrides:
std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
bool ShouldEnterPushedState(const ui::Event& event) override;
std::unique_ptr<views::InkDrop> CreateInkDrop() override;
void NotifyClick(const ui::Event& event) override;
// Sets the icon image with a shadow.
void SetShadowedImage(const gfx::ImageSkia& bitmap);
private:
class AppStatusIndicatorView;
// Updates the parts of the button to reflect the current |state_| and
// alignment. This may add or remove views, layout and paint.
void UpdateState();
// Invoked when |touch_drag_timer_| fires to show dragging UI.
void OnTouchDragTimer();
// Scales up app icon if |scale_up| is true, otherwise scales it back to
// normal size.
void ScaleAppIcon(bool scale_up);
InkDropButtonListener* listener_;
// The shelf view hosting this button.
ShelfView* shelf_view_;
// The icon part of a button can be animated independently of the rest.
views::ImageView* icon_view_;
// Draws an indicator underneath the image to represent the state of the
// application.
AppStatusIndicatorView* indicator_;
// The current application state, a bitfield of State enum values.
int state_;
gfx::ShadowValues icon_shadows_;
// If non-null the destuctor sets this to true. This is set while the menu is
// showing and used to detect if the menu was deleted while running.
bool* destroyed_flag_;
// A timer to defer showing drag UI when the shelf button is pressed.
base::OneShotTimer drag_timer_;
DISALLOW_COPY_AND_ASSIGN(ShelfButton);
};
} // namespace ash
#endif // ASH_SHELF_SHELF_BUTTON_H_