blob: daf99fe10364e681b727d04ccb2b049e722c9c5b [file] [log] [blame]
// Copyright 2015 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.
#include <stdint.h>
#include "base/macros.h"
#include "services/ui/public/cpp/window_observer.h"
namespace ash {
namespace mus {
// Base class for container layout managers. Derived classes override
// LayoutWindow() to perform layout and register properties to which
// changes trigger layout.
// LayoutManagers observe both the bound container and all its children.
// They must be attached prior to any windows being added to the
// container.
class LayoutManager : public ui::WindowObserver {
~LayoutManager() override;
explicit LayoutManager(ui::Window* owner);
void Uninstall();
// Overridden from ui::WindowObserver:
void OnTreeChanged(
const ui::WindowObserver::TreeChangeParams& params) override;
void OnWindowDestroying(ui::Window* window) override;
void OnWindowBoundsChanged(ui::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) override;
void OnWindowSharedPropertyChanged(
ui::Window* window,
const std::string& name,
const std::vector<uint8_t>* old_data,
const std::vector<uint8_t>* new_data) override;
virtual void WindowAdded(ui::Window* window);
virtual void WindowRemoved(ui::Window* window);
virtual void LayoutWindow(ui::Window* window) = 0;
// Add a property that triggers layout when changed.
void AddLayoutProperty(const std::string& property);
ui::Window* owner() { return owner_; }
ui::Window* owner_;
std::set<std::string> layout_properties_;
} // namespace mus
} // namespace ash