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108 lines
3.0 KiB
108 lines
3.0 KiB
#include "graphwidget.h"
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#include <QDebug>
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#include "node.h"
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//#include <QGraphicsTextItem>
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#include "edge.h"
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#include "math.h"
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GraphWidget::GraphWidget(QWidget *parent)
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{
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qDebug() << __PRETTY_FUNCTION__;
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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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setViewportUpdateMode(BoundingRectViewportUpdate);
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setRenderHint(QPainter::Antialiasing);
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setTransformationAnchor(AnchorUnderMouse);
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scale(qreal(0.8), qreal(0.8));
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setMinimumSize(400, 400);
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// node1 = new Node(this);
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// scene->addItem(node1);
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// node1->setPos(0, 0);
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Node *node1 = new Node();
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node1->setHtml(QString("salalal"));
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scene->addItem(node1);
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node1->setPos(-100, -100);
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Node *node2 = new Node();
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node2->setHtml(QString("<b>denes</b> is\na really nice person"));
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scene->addItem(node2);
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node2->setPos(100, 100);
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// QGraphicsTextItem *item = new QGraphicsTextItem();
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// item->setPlainText(QString("salalal"));
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// scene->addItem(item);
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// item->setPos(20, 20);
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// item->setFlag(QGraphicsItem::ItemIsMovable);
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// item->setFlag(QGraphicsItem::ItemSendsGeometryChanges);
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// item->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
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// item->setZValue(-1);
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// QGraphicsTextItem *item2 = new QGraphicsTextItem();
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// item2->setHtml(QString("<b>denes</b> is\na really nice person"));
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// scene->addItem(item2);
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// item2->setPos(10, 10);
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// item2->setFlag(QGraphicsItem::ItemIsMovable);
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// item2->setFlag(QGraphicsItem::ItemSendsGeometryChanges);
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// item2->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
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// item2->setZValue(-1);
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scene->addItem(new Edge(node1, node2));
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activeNode = node1;
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activeNode->setFocus();
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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(qreal(1.2));
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break;
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case Qt::Key_Minus:
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scaleView(1 / qreal(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::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::scaleView(qreal scaleFactor)
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{
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qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
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if (factor < 0.2 || factor > 10) return;
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scale(scaleFactor, scaleFactor);
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}
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