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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_BASE_LAYOUT_MANAGER_H_
#define ASH_WM_BASE_LAYOUT_MANAGER_H_
#pragma once
#include <set>
#include "ash/ash_export.h"
#include "ash/shell_observer.h"
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "ui/aura/layout_manager.h"
#include "ui/aura/root_window_observer.h"
#include "ui/base/ui_base_types.h"
#include "ui/aura/window_observer.h"
namespace aura {
class RootWindow;
class Window;
}
namespace ash {
namespace internal {
// BaseLayoutManager is the simplest possible implementation for a window
// layout manager. It listens for changes to kShowStateKey and resizes the
// window appropriately. Subclasses should be sure to invoke the base class
// for adding and removing windows, otherwise show state will not be tracked
// properly.
class ASH_EXPORT BaseLayoutManager : public aura::LayoutManager,
public aura::RootWindowObserver,
public ash::ShellObserver,
public aura::WindowObserver {
public:
typedef std::set<aura::Window*> WindowSet;
explicit BaseLayoutManager(aura::RootWindow* root_window);
virtual ~BaseLayoutManager();
const WindowSet& windows() const { return windows_; }
// LayoutManager overrides:
virtual void OnWindowResized() OVERRIDE;
virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
virtual void OnChildWindowVisibilityChanged(aura::Window* child,
bool visible) OVERRIDE;
virtual void SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) OVERRIDE;
// RootWindowObserver overrides:
virtual void OnRootWindowResized(const aura::RootWindow* root,
const gfx::Size& old_size) OVERRIDE;
// ash::ShellObserver overrides:
virtual void OnDisplayWorkAreaInsetsChanged() OVERRIDE;
// WindowObserver overrides:
virtual void OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) OVERRIDE;
virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
protected:
// Invoked from OnWindowPropertyChanged() if |kShowStateKey| changes.
virtual void ShowStateChanged(aura::Window* window,
ui::WindowShowState last_show_state);
private:
// Update window bounds based on a change in show state.
void UpdateBoundsFromShowState(aura::Window* window, bool animate);
// Updates window bounds and animates when requested and possible.
void MaybeAnimateToBounds(aura::Window* window,
bool animate,
const gfx::Rect& new_bounds);
// Adjusts the window sizes when the screen changes its size or its
// work area insets.
void AdjustWindowSizesForScreenChange();
// Set of windows we're listening to.
WindowSet windows_;
aura::RootWindow* root_window_;
DISALLOW_COPY_AND_ASSIGN(BaseLayoutManager);
};
} // namespace internal
} // namespace ash
#endif // ASH_WM_BASE_LAYOUT_MANAGER_H_
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