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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_WORKSPACE_PHANTOM_WINDOW_CONTROLLER_H_
#define ASH_WM_WORKSPACE_PHANTOM_WINDOW_CONTROLLER_H_
#include "ash/ash_export.h"
#include "base/basictypes.h"
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/animation/animation_delegate.h"
#include "ui/gfx/rect.h"
namespace aura {
class RootWindow;
class Window;
}
namespace gfx {
class SlideAnimation;
}
namespace views {
class Widget;
}
namespace ash {
namespace internal {
// PhantomWindowController is responsible for showing a phantom representation
// of a window. It's used used during dragging a window to show a snap location.
class ASH_EXPORT PhantomWindowController : public gfx::AnimationDelegate {
public:
explicit PhantomWindowController(aura::Window* window);
virtual ~PhantomWindowController();
// Bounds last passed to Show().
const gfx::Rect& bounds_in_screen() const { return bounds_in_screen_; }
// Animates the phantom window towards |bounds_in_screen|.
// Creates two (if start bounds intersect any root window other than the
// root window that matches the target bounds) or one (otherwise) phantom
// widgets to display animated rectangle in each root.
// This does not immediately show the window.
void Show(const gfx::Rect& bounds_in_screen);
// Hides the phantom.
void Hide();
// Returns true if the phantom is showing.
bool IsShowing() const;
// If set, the phantom window is stacked below this window, otherwise it
// is stacked above the window passed to the constructor.
void set_phantom_below_window(aura::Window* phantom_below_window) {
phantom_below_window_ = phantom_below_window;
}
// gfx::AnimationDelegate overrides:
virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
private:
FRIEND_TEST_ALL_PREFIXES(WorkspaceWindowResizerTest, PhantomWindowShow);
// Creates, shows and returns a phantom widget at |bounds|
// with kShellWindowId_ShelfContainer in |root_window| as a parent.
views::Widget* CreatePhantomWidget(aura::RootWindow* root_window,
const gfx::Rect& bounds_in_screen);
// Window the phantom is placed beneath.
aura::Window* window_;
// If set, the phantom window should get stacked below this window.
aura::Window* phantom_below_window_;
// Initially the bounds of |window_| (in screen coordinates).
// Each time Show() is invoked |start_bounds_| is then reset to the bounds of
// |phantom_widget_| and |bounds_| is set to the value passed into Show().
// The animation animates between these two values.
gfx::Rect start_bounds_;
// Target bounds of the animation in screen coordinates.
gfx::Rect bounds_in_screen_;
// The primary phantom representation of the window. It is parented by the
// root window matching the target bounds.
views::Widget* phantom_widget_;
// If the animation starts on another display, this is the secondary phantom
// representation of the window used on the initial display, otherwise this is
// NULL. This allows animation to progress from one display into the other.
views::Widget* phantom_widget_start_;
// Used to transition the bounds.
scoped_ptr<gfx::SlideAnimation> animation_;
DISALLOW_COPY_AND_ASSIGN(PhantomWindowController);
};
} // namespace internal
} // namespace ash
#endif // ASH_WM_WORKSPACE_PHANTOM_WINDOW_CONTROLLER_H_
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