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Added Qt Elastic Example into NetworkView code.
works quite well! git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@392 b45a01b8-16f6-495d-af2f-9b41ad6348cc
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drbob
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6451e4ebe2
9 changed files with 959 additions and 155 deletions
282
retroshare-gui/src/gui/elastic/graphwidget.cpp
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282
retroshare-gui/src/gui/elastic/graphwidget.cpp
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/****************************************************************************
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**
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** Copyright (C) 2006-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of the example classes of the Qt Toolkit.
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**
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** This file may be used under the terms of the GNU General Public
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** License version 2.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of
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** this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/
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**
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** In addition, as a special exception, Trolltech gives you certain
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** additional rights. These rights are described in the Trolltech GPL
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** Exception version 1.0, which can be found at
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** http://www.trolltech.com/products/qt/gplexception/ and in the file
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** GPL_EXCEPTION.txt in this package.
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**
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** In addition, as a special exception, Trolltech, as the sole copyright
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** holder for Qt Designer, grants users of the Qt/Eclipse Integration
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** plug-in the right for the Qt/Eclipse Integration to link to
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** functionality provided by Qt Designer and its related libraries.
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**
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** Trolltech reserves all rights not expressly granted herein.
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**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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****************************************************************************/
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#include "graphwidget.h"
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#include "edge.h"
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#include "node.h"
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#include <QDebug>
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#include <QGraphicsScene>
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#include <QWheelEvent>
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#include <math.h>
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GraphWidget::GraphWidget(QWidget *parent)
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:QGraphicsView(parent), timerId(0)
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{
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#if 0
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QGraphicsScene *scene = new QGraphicsScene(this);
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scene->setItemIndexMethod(QGraphicsScene::NoIndex);
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scene->setSceneRect(-200, -200, 400, 400);
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setScene(scene);
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centerNode = new Node(this, 1, "You");
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scene->addItem(centerNode);
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centerNode->setPos(0, 0);
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#endif
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centerNode = NULL;
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setCacheMode(CacheBackground);
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setRenderHint(QPainter::Antialiasing);
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setTransformationAnchor(AnchorUnderMouse);
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setResizeAnchor(AnchorViewCenter);
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scale(0.8, 0.8);
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setMinimumSize(400, 400);
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setWindowTitle(tr("Elastic Nodes"));
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clearGraph();
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clearGraph();
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}
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bool GraphWidget::clearGraph()
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{
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QGraphicsScene *oldscene = scene();
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Node *oldcenterNode = centerNode;
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QGraphicsScene *scene = new QGraphicsScene(this);
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scene->setItemIndexMethod(QGraphicsScene::NoIndex);
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scene->setSceneRect(-200, -200, 400, 400);
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setScene(scene);
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//setCacheMode(CacheBackground);
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//setRenderHint(QPainter::Antialiasing);
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//setTransformationAnchor(AnchorUnderMouse);
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//setResizeAnchor(AnchorViewCenter);
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centerNode = new Node(this, 1, "OwnId", "You");
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scene->addItem(centerNode);
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centerNode->setPos(0, 0);
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//scale(0.8, 0.8);
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//setMinimumSize(400, 400);
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//setWindowTitle(tr("Elastic Nodes"));
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if (oldscene)
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{
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delete oldscene;
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}
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if (oldcenterNode)
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{
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//delete oldcenterNode;
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}
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std::list<Edge *>::iterator eit;
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std::map<std::string, Node *>::iterator it;
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for(eit = edgeList.begin(); eit != edgeList.end(); eit++)
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{
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//delete(*eit);
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}
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for(it = nodeMap.begin(); it != nodeMap.end(); it++)
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{
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//delete(it->second);
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}
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nodeMap.clear();
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edgeList.clear();
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return true;
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}
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void GraphWidget::addNode(uint32_t type, std::string id, std::string name)
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{
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Node *node = new Node(this, type, id, name);
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/* store node */
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nodeMap[id] = node;
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scene()->addItem(node);
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node->setPos(-50 + qrand() % 100 , -50 + qrand() % 100);
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}
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void GraphWidget::addEdge(std::string id1, std::string id2)
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{
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std::map<std::string, Node *>::iterator it;
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Node *n1 = NULL;
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Node *n2 = NULL;
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if (id1 == "")
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{
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n1 = centerNode;
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}
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else
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{
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it = nodeMap.find(id1);
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if (it != nodeMap.end())
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{
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n1 = it->second;
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}
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}
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it = nodeMap.find(id2);
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if (it != nodeMap.end())
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{
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n2 = it->second;
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}
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if ((n1) && (n2))
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{
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Edge *edge = new Edge(n1, n2);
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scene()->addItem(edge);
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edgeList.push_back(edge);
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}
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}
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void GraphWidget::itemMoved()
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{
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if (!timerId)
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timerId = startTimer(1000 / 25);
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}
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void GraphWidget::keyPressEvent(QKeyEvent *event)
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{
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switch (event->key()) {
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case Qt::Key_Up:
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centerNode->moveBy(0, -20);
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break;
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case Qt::Key_Down:
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centerNode->moveBy(0, 20);
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break;
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case Qt::Key_Left:
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centerNode->moveBy(-20, 0);
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break;
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case Qt::Key_Right:
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centerNode->moveBy(20, 0);
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break;
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case Qt::Key_Plus:
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scaleView(1.2);
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break;
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case Qt::Key_Minus:
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scaleView(1 / 1.2);
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break;
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case Qt::Key_Space:
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case Qt::Key_Enter:
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foreach (QGraphicsItem *item, scene()->items()) {
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if (qgraphicsitem_cast<Node *>(item))
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item->setPos(-150 + qrand() % 300, -150 + qrand() % 300);
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}
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break;
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default:
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QGraphicsView::keyPressEvent(event);
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}
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}
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void GraphWidget::timerEvent(QTimerEvent *event)
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{
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Q_UNUSED(event);
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QList<Node *> nodes;
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foreach (QGraphicsItem *item, scene()->items()) {
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if (Node *node = qgraphicsitem_cast<Node *>(item))
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nodes << node;
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}
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foreach (Node *node, nodes)
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node->calculateForces();
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bool itemsMoved = false;
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foreach (Node *node, nodes) {
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if (node->advance())
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itemsMoved = true;
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}
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if (!itemsMoved) {
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killTimer(timerId);
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timerId = 0;
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}
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}
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void GraphWidget::wheelEvent(QWheelEvent *event)
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{
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scaleView(pow((double)2, -event->delta() / 240.0));
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}
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void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)
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{
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Q_UNUSED(rect);
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// Shadow
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QRectF sceneRect = this->sceneRect();
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QRectF rightShadow(sceneRect.right(), sceneRect.top() + 5, 5, sceneRect.height());
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QRectF bottomShadow(sceneRect.left() + 5, sceneRect.bottom(), sceneRect.width(), 5);
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if (rightShadow.intersects(rect) || rightShadow.contains(rect))
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painter->fillRect(rightShadow, Qt::darkGray);
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if (bottomShadow.intersects(rect) || bottomShadow.contains(rect))
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painter->fillRect(bottomShadow, Qt::darkGray);
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// Fill
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QLinearGradient gradient(sceneRect.topLeft(), sceneRect.bottomRight());
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gradient.setColorAt(0, Qt::white);
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gradient.setColorAt(1, Qt::lightGray);
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painter->fillRect(rect.intersect(sceneRect), gradient);
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painter->setBrush(Qt::NoBrush);
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painter->drawRect(sceneRect);
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// Text
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// QRectF textRect(sceneRect.left() + 4, sceneRect.top() + 4,
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// sceneRect.width() - 4, sceneRect.height() - 4);
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// QString message(tr("Click and drag the nodes around, and zoom with the mouse "
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// "wheel or the '+' and '-' keys"));
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//
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// QFont font = painter->font();
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// font.setBold(true);
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// font.setPointSize(14);
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// painter->setFont(font);
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// painter->setPen(Qt::lightGray);
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// painter->drawText(textRect.translated(2, 2), message);
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// painter->setPen(Qt::black);
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// painter->drawText(textRect, message);
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}
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void GraphWidget::scaleView(qreal scaleFactor)
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{
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qreal factor = matrix().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
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if (factor < 0.07 || factor > 100)
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return;
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scale(scaleFactor, scaleFactor);
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}
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