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Diffstat (limited to 'doc/src/snippets/code/doc_src_graphicsview.cpp')
-rw-r--r-- | doc/src/snippets/code/doc_src_graphicsview.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/doc/src/snippets/code/doc_src_graphicsview.cpp b/doc/src/snippets/code/doc_src_graphicsview.cpp new file mode 100644 index 0000000..00ebab3 --- /dev/null +++ b/doc/src/snippets/code/doc_src_graphicsview.cpp @@ -0,0 +1,117 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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; +QGraphicsRectItem *rect = scene.addRect(QRectF(0, 0, 100, 100)); + +QGraphicsItem *item = scene.itemAt(50, 50); +// item == rect +//! [0] + + +//! [1] +QGraphicsScene scene; +myPopulateScene(&scene); + +QGraphicsView view(&scene); +view.show(); +//! [1] + + +//! [2] +class View : public QGraphicsView +{ +Q_OBJECT + ... +public slots: + void zoomIn() { scale(1.2, 1.2); } + void zoomOut() { scale(1 / 1.2, 1 / 1.2); } + void rotateLeft() { rotate(-10); } + void rotateRight() { rotate(10); } + ... +}; +//! [2] + + +//! [3] +QGraphicsScene scene; +scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green)); + +QPrinter printer; +if (QPrintDialog(&printer).exec() == QDialog::Accepted) { + QPainter painter(&printer); + painter.setRenderHint(QPainter::Antialiasing); + scene.render(&painter); +} +//! [3] + + +//! [4] +QGraphicsScene scene; +scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green)); + +QPixmap pixmap; +QPainter painter(&pixmap); +painter.setRenderHint(QPainter::Antialiasing); +scene.render(&painter); +painter.end(); + +pixmap.save("scene.png"); +//! [4] + + +//! [5] +void CustomItem::mousePressEvent(QGraphicsSceneMouseEvent *event) +{ + QMimeData *data = new QMimeData; + data->setColor(Qt::green); + + QDrag *drag = new QDrag(event->widget()); + drag->setMimeData(data); + drag->start(); +} +//! [5] + + +//! [6] +QGraphicsView view(&scene); +view.setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers))); +//! [6] |