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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_H_
#define ASH_SHELF_SHELF_H_
#include "ash/ash_export.h"
#include "ash/shelf/shelf_constants.h"
#include "ash/shelf/shelf_types.h"
#include "ash/shelf/shelf_widget.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/geometry/size.h"
#include "ui/views/widget/widget_observer.h"
namespace app_list {
class ApplicationDragAndDropHost;
}
namespace aura {
class Window;
}
namespace gfx {
class Rect;
}
namespace views {
class View;
}
namespace ash {
class FocusCycler;
class ShelfDelegate;
class ShelfIconObserver;
class ShelfModel;
class ShelfView;
namespace test {
class ShelfTestAPI;
}
class ASH_EXPORT Shelf {
public:
static const char kNativeViewName[];
Shelf(ShelfModel* model, ShelfDelegate* delegate, ShelfWidget* widget);
virtual ~Shelf();
// Return the shelf for the primary display. NULL if no user is logged in yet.
static Shelf* ForPrimaryDisplay();
// Return the shelf for the display that |window| is currently on, or a shelf
// on primary display if the shelf per display feature is disabled. NULL if no
// user is logged in yet.
static Shelf* ForWindow(const aura::Window* window);
void SetAlignment(ShelfAlignment alignment);
ShelfAlignment alignment() const { return alignment_; }
bool IsHorizontalAlignment() const;
// Sets the ShelfAutoHideBehavior. See enum description for details.
void SetAutoHideBehavior(ShelfAutoHideBehavior behavior);
ShelfAutoHideBehavior GetAutoHideBehavior() const;
// A helper functions that chooses values specific to a shelf alignment.
template <typename T>
T SelectValueForShelfAlignment(T bottom, T left, T right, T top) const {
switch (alignment_) {
case SHELF_ALIGNMENT_BOTTOM:
return bottom;
case SHELF_ALIGNMENT_LEFT:
return left;
case SHELF_ALIGNMENT_RIGHT:
return right;
case SHELF_ALIGNMENT_TOP:
return top;
}
NOTREACHED();
return right;
}
// A helper functions that chooses values specific to a shelf alignment type.
template <typename T>
T PrimaryAxisValue(T horizontal, T vertical) const {
return IsHorizontalAlignment() ? horizontal : vertical;
}
// Returns the screen bounds of the item for the specified window. If there is
// no item for the specified window an empty rect is returned.
gfx::Rect GetScreenBoundsOfItemIconForWindow(const aura::Window* window);
// Updates the icon position given the current window bounds. This is used
// when dragging panels to reposition them with respect to the other panels.
void UpdateIconPositionForWindow(aura::Window* window);
// Activates the the shelf item specified by the index in the list of shelf
// items.
void ActivateShelfItem(int index);
// Cycles the window focus linearly over the current shelf items.
void CycleWindowLinear(CycleDirection direction);
void AddIconObserver(ShelfIconObserver* observer);
void RemoveIconObserver(ShelfIconObserver* observer);
// Returns true if the shelf is showing a context menu.
bool IsShowingMenu() const;
bool IsShowingOverflowBubble() const;
void SetVisible(bool visible) const;
bool IsVisible() const;
void SchedulePaint();
views::View* GetAppListButtonView() const;
// Launch a 0-indexed shelf item in the shelf.
// A negative index launches the last shelf item in the shelf.
void LaunchAppIndexAt(int item_index);
ShelfWidget* shelf_widget() { return shelf_widget_; }
// TODO(msw): ShelfLayoutManager should not be accessed externally.
ShelfLayoutManager* shelf_layout_manager() {
return shelf_widget_->shelf_layout_manager();
}
// Returns rectangle bounding all visible shelf items. Used screen coordinate
// system.
gfx::Rect GetVisibleItemsBoundsInScreen() const;
// Returns ApplicationDragAndDropHost for this shelf.
app_list::ApplicationDragAndDropHost* GetDragAndDropHostForAppList();
private:
friend class test::ShelfTestAPI;
// ShelfView used to display icons.
ShelfView* shelf_view_;
ShelfAlignment alignment_;
ShelfDelegate* delegate_;
ShelfWidget* shelf_widget_;
DISALLOW_COPY_AND_ASSIGN(Shelf);
};
} // namespace ash
#endif // ASH_SHELF_SHELF_H_
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