diff options
author | Gabriel de Dietrich <gabriel.dietrich-de@nokia.com> | 2012-08-17 13:23:19 +0200 |
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committer | Qt by Nokia <qt-info@nokia.com> | 2012-08-20 12:20:55 +0200 |
commit | 806dda08d685bc5f9ed71dfe8b61f21848d48066 (patch) | |
tree | a63533a1c4a335ae17adc105abb0ae4e62e2f26e /examples/graphicsview/elasticnodes/graphwidget.cpp | |
parent | 9f942014e31842b512c3198de035d041c59f54a9 (diff) |
Moving .qdoc files under examples/widgets/doc
Updated those .qdoc files to refer to the new relative examples
emplacement. Images and snippets to be moved later.
Also grouped all widgets related examples under widgets.
Change-Id: Ib29696e2d8948524537f53e8dda88f9ee26a597f
Reviewed-by: J-P Nurmi <j-p.nurmi@nokia.com>
Diffstat (limited to 'examples/graphicsview/elasticnodes/graphwidget.cpp')
-rw-r--r-- | examples/graphicsview/elasticnodes/graphwidget.cpp | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/examples/graphicsview/elasticnodes/graphwidget.cpp b/examples/graphicsview/elasticnodes/graphwidget.cpp deleted file mode 100644 index 36005b85f4..0000000000 --- a/examples/graphicsview/elasticnodes/graphwidget.cpp +++ /dev/null @@ -1,250 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the examples 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "graphwidget.h" -#include "edge.h" -#include "node.h" - -#include <QtWidgets> - -#include <math.h> - -//! [0] -GraphWidget::GraphWidget(QWidget *parent) - : QGraphicsView(parent), timerId(0) -{ - QGraphicsScene *scene = new QGraphicsScene(this); - scene->setItemIndexMethod(QGraphicsScene::NoIndex); - scene->setSceneRect(-200, -200, 400, 400); - setScene(scene); - setCacheMode(CacheBackground); - setViewportUpdateMode(BoundingRectViewportUpdate); - setRenderHint(QPainter::Antialiasing); - setTransformationAnchor(AnchorUnderMouse); - scale(qreal(0.8), qreal(0.8)); - setMinimumSize(400, 400); - setWindowTitle(tr("Elastic Nodes")); -//! [0] - -//! [1] - Node *node1 = new Node(this); - Node *node2 = new Node(this); - Node *node3 = new Node(this); - Node *node4 = new Node(this); - centerNode = new Node(this); - Node *node6 = new Node(this); - Node *node7 = new Node(this); - Node *node8 = new Node(this); - Node *node9 = new Node(this); - scene->addItem(node1); - scene->addItem(node2); - scene->addItem(node3); - scene->addItem(node4); - scene->addItem(centerNode); - scene->addItem(node6); - scene->addItem(node7); - scene->addItem(node8); - scene->addItem(node9); - scene->addItem(new Edge(node1, node2)); - scene->addItem(new Edge(node2, node3)); - scene->addItem(new Edge(node2, centerNode)); - scene->addItem(new Edge(node3, node6)); - scene->addItem(new Edge(node4, node1)); - scene->addItem(new Edge(node4, centerNode)); - scene->addItem(new Edge(centerNode, node6)); - scene->addItem(new Edge(centerNode, node8)); - scene->addItem(new Edge(node6, node9)); - scene->addItem(new Edge(node7, node4)); - scene->addItem(new Edge(node8, node7)); - scene->addItem(new Edge(node9, node8)); - - node1->setPos(-50, -50); - node2->setPos(0, -50); - node3->setPos(50, -50); - node4->setPos(-50, 0); - centerNode->setPos(0, 0); - node6->setPos(50, 0); - node7->setPos(-50, 50); - node8->setPos(0, 50); - node9->setPos(50, 50); -} -//! [1] - -//! [2] -void GraphWidget::itemMoved() -{ - if (!timerId) - timerId = startTimer(1000 / 25); -} -//! [2] - -//! [3] -void GraphWidget::keyPressEvent(QKeyEvent *event) -{ - switch (event->key()) { - case Qt::Key_Up: - centerNode->moveBy(0, -20); - break; - case Qt::Key_Down: - centerNode->moveBy(0, 20); - break; - case Qt::Key_Left: - centerNode->moveBy(-20, 0); - break; - case Qt::Key_Right: - centerNode->moveBy(20, 0); - break; - case Qt::Key_Plus: - zoomIn(); - break; - case Qt::Key_Minus: - zoomOut(); - break; - case Qt::Key_Space: - case Qt::Key_Enter: - shuffle(); - break; - default: - QGraphicsView::keyPressEvent(event); - } -} -//! [3] - -//! [4] -void GraphWidget::timerEvent(QTimerEvent *event) -{ - Q_UNUSED(event); - - QList<Node *> nodes; - foreach (QGraphicsItem *item, scene()->items()) { - if (Node *node = qgraphicsitem_cast<Node *>(item)) - nodes << node; - } - - foreach (Node *node, nodes) - node->calculateForces(); - - bool itemsMoved = false; - foreach (Node *node, nodes) { - if (node->advance()) - itemsMoved = true; - } - - if (!itemsMoved) { - killTimer(timerId); - timerId = 0; - } -} -//! [4] - -//! [5] -void GraphWidget::wheelEvent(QWheelEvent *event) -{ - scaleView(pow((double)2, -event->delta() / 240.0)); -} -//! [5] - -//! [6] -void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect) -{ - Q_UNUSED(rect); - - // Shadow - QRectF sceneRect = this->sceneRect(); - QRectF rightShadow(sceneRect.right(), sceneRect.top() + 5, 5, sceneRect.height()); - QRectF bottomShadow(sceneRect.left() + 5, sceneRect.bottom(), sceneRect.width(), 5); - if (rightShadow.intersects(rect) || rightShadow.contains(rect)) - painter->fillRect(rightShadow, Qt::darkGray); - if (bottomShadow.intersects(rect) || bottomShadow.contains(rect)) - painter->fillRect(bottomShadow, Qt::darkGray); - - // Fill - QLinearGradient gradient(sceneRect.topLeft(), sceneRect.bottomRight()); - gradient.setColorAt(0, Qt::white); - gradient.setColorAt(1, Qt::lightGray); - painter->fillRect(rect.intersected(sceneRect), gradient); - painter->setBrush(Qt::NoBrush); - painter->drawRect(sceneRect); - - // Text - QRectF textRect(sceneRect.left() + 4, sceneRect.top() + 4, - sceneRect.width() - 4, sceneRect.height() - 4); - QString message(tr("Click and drag the nodes around, and zoom with the mouse " - "wheel or the '+' and '-' keys")); - - QFont font = painter->font(); - font.setBold(true); - font.setPointSize(14); - painter->setFont(font); - painter->setPen(Qt::lightGray); - painter->drawText(textRect.translated(2, 2), message); - painter->setPen(Qt::black); - painter->drawText(textRect, message); -} -//! [6] - -//! [7] -void GraphWidget::scaleView(qreal scaleFactor) -{ - qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width(); - if (factor < 0.07 || factor > 100) - return; - - scale(scaleFactor, scaleFactor); -} -//! [7] - -void GraphWidget::shuffle() -{ - foreach (QGraphicsItem *item, scene()->items()) { - if (qgraphicsitem_cast<Node *>(item)) - item->setPos(-150 + qrand() % 300, -150 + qrand() % 300); - } -} - -void GraphWidget::zoomIn() -{ - scaleView(qreal(1.2)); -} - -void GraphWidget::zoomOut() -{ - scaleView(1 / qreal(1.2)); -} |