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// Copyright (c) 2012 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_WM_TOPLEVEL_WINDOW_EVENT_FILTER_H_
#define ASH_WM_TOPLEVEL_WINDOW_EVENT_FILTER_H_
#include <set>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura/client/window_move_client.h"
#include "ui/aura/event_filter.h"
#include "ash/ash_export.h"
#include "ui/gfx/point.h"
#include "ui/gfx/rect.h"
namespace aura {
class LocatedEvent;
class MouseEvent;
class Window;
}
namespace ash {
class WindowResizer;
class ASH_EXPORT ToplevelWindowEventFilter :
public aura::EventFilter,
public aura::client::WindowMoveClient {
public:
explicit ToplevelWindowEventFilter(aura::Window* owner);
virtual ~ToplevelWindowEventFilter();
// Sets the size of the grid. If non-zero all resizes and moves are forced to
// fall on a grid of the specified size. The default is 0, meaning the x,y and
// width,height are not restricted in anyway.
void set_grid_size(int size) { grid_size_ = size; }
int grid_size() const { return grid_size_; }
// Overridden from aura::EventFilter:
virtual bool PreHandleKeyEvent(aura::Window* target,
aura::KeyEvent* event) OVERRIDE;
virtual bool PreHandleMouseEvent(aura::Window* target,
aura::MouseEvent* event) OVERRIDE;
virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
aura::TouchEvent* event) OVERRIDE;
virtual ui::GestureStatus PreHandleGestureEvent(
aura::Window* target,
aura::GestureEvent* event) OVERRIDE;
// Overridden form aura::client::WindowMoveClient:
virtual void RunMoveLoop(aura::Window* source) OVERRIDE;
virtual void EndMoveLoop() OVERRIDE;
protected:
// Creates a new WindowResizer.
virtual WindowResizer* CreateWindowResizer(aura::Window* window,
const gfx::Point& point_in_parent,
int window_component);
private:
enum DragCompletionStatus {
DRAG_COMPLETE,
DRAG_REVERT
};
// Finishes the drag.
void CompleteDrag(DragCompletionStatus status, int event_flags);
// Called during a drag to resize/position the window.
// The return value is returned by OnMouseEvent() above.
bool HandleDrag(aura::Window* target, aura::LocatedEvent* event);
// Called during mouse moves to update window resize shadows.
// Return value is returned by OnMouseEvent() above.
bool HandleMouseMoved(aura::Window* target, aura::LocatedEvent* event);
// Called for mouse exits to hide window resize shadows.
// Return value is returned by OnMouseEvent() above.
bool HandleMouseExited(aura::Window* target, aura::LocatedEvent* event);
// Are we running a nested message loop from RunMoveLoop().
bool in_move_loop_;
// Is a gesture-resize in progress?
bool in_gesture_resize_;
// See description above setter.
int grid_size_;
scoped_ptr<WindowResizer> window_resizer_;
base::Closure quit_closure_;
DISALLOW_COPY_AND_ASSIGN(ToplevelWindowEventFilter);
};
} // namespace aura
#endif // ASH_WM_TOPLEVEL_WINDOW_EVENT_FILTER_H_