/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
/** Wrapper around a shared canvas that forwards most of its methods to the shared canvas. Most notable differences are: 1. The transformation of the ViewState of forwarded calls is modified by adding an offset. 2. The clip polygon of the ViewState of forwarded calls is intersected with a clip rectangle that can be set via SetClip(). 3. Calls to updateScreen() are collected. One call to the updateScreen() method of the shared canvas is made asynchronously.
The canvas can use different canvases for sharing and for sprite construction. This allows the shared canvas to be a canvas of sprite itself.
*/ class PresenterCanvas
: public PresenterCanvasInterfaceBase
{ public: /** This constructor is used when a PresenterCanvas object is created directly, typically by the PresenterCanvasFactory. @param rxUpdateCanvas This canvas is used to call updateScreen() at and to create sprites. In the typical case this canvas is identical to the rxSharedCanvas argument. @param rxUpdateWindow The window that belongs to the canvas given by the rxUpdateCanvas argument. @param rxSharedCanvas The canvas that is wrapped by the new instance of this class. Typically this is a regular XSpriteCanvas and then is identical to the one given by the rxUpdateCanvas argument. It may be the canvas of a sprite which does not support the XSpriteCanvas interface. In that case the canvas that created the sprite can be given as rxUpdateCanvas argument to allow to create further sprites and to have proper calls to updateScreen(). @param rxSharedWindow The window that belongs to the canvas given by the rxSharedCanvas argument. @param rxWindow The window that is represented by the new PresenterCanvas object. It is expected to be a direct descendant of rxSharedWindow. Its position inside rxSharedWindow defines the offset of the canvas implemented by the new PresenterCanvas object and rxSharedCanvas.
*/
PresenterCanvas ( const css::uno::Reference<css::rendering::XSpriteCanvas>& rxUpdateCanvas, const css::uno::Reference<css::awt::XWindow>& rxUpdateWindow, const css::uno::Reference<css::rendering::XCanvas>& rxSharedCanvas, const css::uno::Reference<css::awt::XWindow>& rxSharedWindow, const css::uno::Reference<css::awt::XWindow>& rxWindow); virtual ~PresenterCanvas() override;
PresenterCanvas(const PresenterCanvas&) = delete;
PresenterCanvas& operator=(const PresenterCanvas&) = delete;
/** Merge the given view state with the view state that translates the (virtual) child canvas to the shared canvas.
*/
css::rendering::ViewState MergeViewState ( const css::rendering::ViewState& rViewState, const css::awt::Point& raOffset);
/** Called by custom sprites to update their clip polygon so that they are clipped at the borders of the canvas. This method has to be called after each change of the sprite location so that the bounds of the canvas can be transformed into the coordinate system of the sprite.
*/
css::uno::Reference<css::rendering::XPolyPolygon2D> UpdateSpriteClip ( const css::uno::Reference<css::rendering::XPolyPolygon2D>& rxOriginalClip, const css::geometry::RealPoint2D& rLocation);
/** The window for which a canvas is emulated.
*/
css::uno::Reference<css::awt::XWindow> mxWindow;
/** Offset of the emulated canvas with respect to the shared canvas.
*/
css::awt::Point maOffset;
/** The UpdateRequester is used by updateScreen() to schedule updateScreen() calls at the shared canvas.
*/
std::shared_ptr<CanvasUpdateRequester> m_pUpdateRequester;
/** When this flag is true (it is set to true after every call to updateScreen()) then the next call to MergeViewState updates the maOffset member. A possible optimization would set this flag only to true when one of the windows between mxWindow and mxSharedWindow changes its position.
*/ bool mbOffsetUpdatePending;
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.