blob: 76664cd963505bc48fd0590b6912c921f6c64634 [file] [log] [blame]
// Copyright 2016 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 "ash/ash_export.h"
namespace gfx {
class Rect;
namespace ash {
class WmWindow;
// Used to position the child WmWindows of a WmWindow. WmLayoutManager is called
// at key points in a WmWindows life cycle thats allow sthe WmLayoutManager to
// position or change child WmWindows.
class ASH_EXPORT WmLayoutManager {
virtual ~WmLayoutManager() {}
// Invoked when the window the WmLayoutManager is associated with is resized.
virtual void OnWindowResized() = 0;
// Invoked when a window is added to the window the WmLayoutManager is
// associated with.
virtual void OnWindowAddedToLayout(WmWindow* child) = 0;
// Invoked prior to removing |child|.
virtual void OnWillRemoveWindowFromLayout(WmWindow* child) = 0;
// Invoked after removing |child|.
virtual void OnWindowRemovedFromLayout(WmWindow* child) = 0;
// Invoked when SetVisible() is invoked on |child|. |visible| is the value
// supplied to SetVisible(). If |visible| is true, child->IsVisible() may
// still return false. See description in aura::Window::IsVisible() for
// details.
virtual void OnChildWindowVisibilityChanged(WmWindow* child,
bool visibile) = 0;
// Invoked when WmWindow::SetBounds() is called on |child|. This allows the
// WmLayoutManager to modify the bounds as appropriate before processing the
// request, including ignoring the request. Implementation must call
// SetChildBoundsDirect() so that an infinite loop does not result.
virtual void SetChildBounds(WmWindow* child,
const gfx::Rect& requested_bounds) = 0;
} // namespace ash