CMake.git - CMake is a cross-platform, open-source build system generator.

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/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [0] QGraphicsScene scene; scene.addText("Hello, world!"); QGraphicsView view(&scene); view.show(); //! [0] //! [1] QGraphicsScene scene; scene.addItem(... ... QPrinter printer(QPrinter::HighResolution); printer.setPaperSize(QPrinter::A4); QPainter painter(&printer); scene.render(&painter); //! [1] //! [2] QSizeF segmentSize = sceneRect().size() / pow(2, depth - 1); //! [2] //! [3] QGraphicsScene scene; QGraphicsView view(&scene); view.show(); // a blue background scene.setBackgroundBrush(Qt::blue); // a gradient background QRadialGradient gradient(0, 0, 10); gradient.setSpread(QGradient::RepeatSpread); scene.setBackgroundBrush(gradient); //! [3] //! [4] QGraphicsScene scene; QGraphicsView view(&scene); view.show(); // a white semi-transparent foreground scene.setForegroundBrush(QColor(255, 255, 255, 127)); // a grid foreground scene.setForegroundBrush(QBrush(Qt::lightGray, Qt::CrossPattern)); //! [4] //! [5] QRectF TileScene::rectForTile(int x, int y) const { // Return the rectangle for the tile at position (x, y). return QRectF(x * tileWidth, y * tileHeight, tileWidth, tileHeight); } void TileScene::setTile(int x, int y, const QPixmap &pixmap) { // Sets or replaces the tile at position (x, y) with pixmap. if (x >= 0 && x < numTilesH && y >= 0 && y < numTilesV) { tiles[y][x] = pixmap; invalidate(rectForTile(x, y), BackgroundLayer); } } void TileScene::drawBackground(QPainter *painter, const QRectF &exposed) { // Draws all tiles that intersect the exposed area. for (int y = 0; y < numTilesV; ++y) { for (int x = 0; x < numTilesH; ++x) { QRectF rect = rectForTile(x, y); if (exposed.intersects(rect)) painter->drawPixmap(rect.topLeft(), tiles[y][x]); } } } //! [5]


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