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authorGabriel de Dietrich <gabriel.dietrich-de@nokia.com>2012-08-17 13:23:19 +0200
committerQt by Nokia <qt-info@nokia.com>2012-08-20 12:20:55 +0200
commit806dda08d685bc5f9ed71dfe8b61f21848d48066 (patch)
treea63533a1c4a335ae17adc105abb0ae4e62e2f26e /examples/graphicsview/elasticnodes/graphwidget.cpp
parent9f942014e31842b512c3198de035d041c59f54a9 (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.cpp250
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));
-}