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qtmindmap/graphwidget.cpp

383 lines
10 KiB

#include "graphwidget.h"
#include <QDebug>
#include <QStatusBar>
#include "node.h"
#include "edge.h"
#include "math.h"
#include "mainwindow.h"
GraphWidget::GraphWidget(QWidget *parent) :
QGraphicsView(parent),
m_parent(parent),
m_activeNode(0),
m_showingNodeNumbers(false),
m_followNode(0)
{
qDebug() << __PRETTY_FUNCTION__;
m_scene = new QGraphicsScene(this);
m_scene->setItemIndexMethod(QGraphicsScene::NoIndex);
m_scene->setSceneRect(-400, -400, 800, 800);
setScene(m_scene);
setCacheMode(CacheBackground);
setViewportUpdateMode(BoundingRectViewportUpdate);
setRenderHint(QPainter::Antialiasing);
setTransformationAnchor(AnchorUnderMouse);
setMinimumSize(400, 400);
Node *node1 = new Node(this);
node1->setHtml(QString("<img src=:/heart.svg width=40 height=40></img>"));
m_scene->addItem(node1);
node1->setPos(-10, -10);
node1->setBorder(false);
m_nodeList.append(node1);
Node *node2 = new Node(this);
node2->setHtml(QString("work: <a href=www.hup.hu>hup.hu</a>"));
m_scene->addItem(node2);
node2->setPos(60, -10);
m_nodeList.append(node2);
Node *node3 = new Node(this);
node3->setHtml(QString("read"));
m_scene->addItem(node3);
node3->setPos(-70, -10);
m_nodeList.append(node3);
Node *node4 = new Node(this);
node4->setHtml(QString("pragmatic programmer"));
m_scene->addItem(node4);
node4->setPos(-120, -80);
m_nodeList.append(node4);
Node *node5 = new Node(this);
node5->setHtml(QString("semmi kulonos"));
m_scene->addItem(node5);
node5->setPos(-10, 50);
m_nodeList.append(node5);
Node *node6 = new Node(this);
node6->setHtml(QString("rape goats"));
m_scene->addItem(node6);
node6->setPos(-10, 100);
m_nodeList.append(node6);
Node *node7 = new Node(this);
node7->setHtml(QString("node <h1>important</h1> shit"));
m_scene->addItem(node7);
node7->setPos(-200, 50);
m_nodeList.append(node7);
Node *node8 = new Node(this);
node8->setHtml(QString("more than\none lins"));
m_scene->addItem(node8);
node8->setPos(50, -80);
m_nodeList.append(node8);
Node *node9 = new Node(this);
node9->setHtml(QString("iam a <b>bald</b> and <i>italian</i> guy"));
m_scene->addItem(node9);
node9->setPos(90, 90);
m_nodeList.append(node9);
Node *node10 = new Node(this);
node10->setHtml(QString("no joke"));
m_scene->addItem(node10);
node10->setPos(-160, -10);
m_nodeList.append(node10);
Node *node11 = new Node(this);
node11->setHtml(QString("salalal"));
m_scene->addItem(node11);
node11->setPos(-120, -120);
m_nodeList.append(node11);
Node *node12 = new Node(this);
node12->setHtml(QString("lalalala"));
m_scene->addItem(node12);
node12->setPos(170, -10);
m_nodeList.append(node12);;
m_scene->addItem(new Edge(node1, node2));
m_scene->addItem(new Edge(node1, node3));
m_scene->addItem(new Edge(node3, node4));
m_scene->addItem(new Edge(node1, node5));
m_scene->addItem(new Edge(node5, node6));
m_scene->addItem(new Edge(node4, node11));
m_scene->addItem(new Edge(node2, node12));
m_scene->addItem(new Edge(node3, node10));
m_scene->addItem(new Edge(node10, node7));
m_scene->addItem(new Edge(node5, node7));
m_scene->addItem(new Edge(node2, node8));
m_scene->addItem(new Edge(node2, node9));
m_activeNode = m_nodeList.first();
m_activeNode->setActive();
}
QGraphicsScene *GraphWidget::getScene()
{
return m_scene;
}
void GraphWidget::keyPressEvent(QKeyEvent *event)
{
qDebug() << __PRETTY_FUNCTION__;
qDebug() << event->key();
switch (event->key()) {
case Qt::Key_Up:
if (m_activeNode)
m_activeNode->moveBy(0, -20);
break;
case Qt::Key_Down:
if (m_activeNode)
m_activeNode->moveBy(0, 20);
break;
case Qt::Key_Left:
if (m_activeNode)
m_activeNode->moveBy(-20, 0);
break;
case Qt::Key_Right:
if (m_activeNode)
m_activeNode->moveBy(20, 0);
break;
case Qt::Key_Plus:
scaleView(qreal(1.2));
break;
case Qt::Key_Minus:
scaleView(1 / qreal(1.2));
break;
case Qt::Key_F:
m_showingNodeNumbers = !m_showingNodeNumbers;
if (m_showingNodeNumbers)
m_followNumber.clear();
showingAllNodeNumbers(m_showingNodeNumbers);
if (m_showingNodeNumbers)
{
m_nodeList.first()->showNumber(0,true,true);
m_followNode = m_nodeList.first();
}
break;
case Qt::Key_Insert:
if (!m_activeNode)
{
dynamic_cast<MainWindow *>(m_parent)->getStatusBar()->showMessage(
tr("No active node."),
5000); // millisec
}
else
{
insertNode();
}
break;
case Qt::Key_0:
case Qt::Key_1:
case Qt::Key_2:
case Qt::Key_3:
case Qt::Key_4:
case Qt::Key_5:
case Qt::Key_6:
case Qt::Key_7:
case Qt::Key_8:
case Qt::Key_9:
if (!m_showingNodeNumbers)
break;
m_followNumber.append(QString::number(event->key()-48));
showingAllNodeNumbers(false);
showingNodeNumbersBeginWithNumber(m_followNumber.toInt(), true);
break;
case Qt::Key_Backspace:
if (!m_showingNodeNumbers)
break;
if (!m_followNumber.isEmpty())
{
m_followNumber.remove(m_followNumber.length()-1,1);
if (m_followNumber.isEmpty())
{
showingAllNodeNumbers(true);
m_nodeList.first()->showNumber(0,true,true);
m_followNode = m_nodeList.first();
}
else
{
showingAllNodeNumbers(false);
showingNodeNumbersBeginWithNumber(m_followNumber.toInt(), true);
}
}
break;
case Qt::Key_Return:
case Qt::Key_Enter:
if (m_followNode && m_showingNodeNumbers)
{
qDebug() << m_activeNode;
qDebug() << m_followNode;
showingAllNodeNumbers(false);
if (m_activeNode)
m_activeNode->setActive(false);
m_activeNode = m_followNode;
m_activeNode->setActive();
m_showingNodeNumbers = false;
}
break;
case Qt::Key_Delete:
if (m_activeNode)
{
if (m_followNode==m_activeNode)
m_followNode=0;
m_nodeList.removeAll(m_activeNode);
delete m_activeNode;
m_activeNode = 0;
if (m_showingNodeNumbers)
{
m_showingNodeNumbers = false;
showingAllNodeNumbers(false);
}
}
else
{
dynamic_cast<MainWindow *>(m_parent)->getStatusBar()->showMessage(
tr("No active node."),
5000); // millisec
}
break;
default:
QGraphicsView::keyPressEvent(event);
}
}
void GraphWidget::wheelEvent(QWheelEvent *event)
{
scaleView(pow((double)2, -event->delta() / 240.0));
}
void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)
{
Q_UNUSED(rect);
QRectF sceneRect = this->sceneRect();
// Fill
QLinearGradient gradient(sceneRect.topLeft(), sceneRect.bottomRight());
gradient.setColorAt(0, Qt::white);
gradient.setColorAt(1, Qt::lightGray);
painter->fillRect(rect.intersect(sceneRect), gradient);
painter->setBrush(Qt::NoBrush);
painter->drawRect(sceneRect);
}
void GraphWidget::scaleView(qreal scaleFactor)
{
qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
if (factor < 0.2 || factor > 10) return;
scale(scaleFactor, scaleFactor);
}
void GraphWidget::setActiveNode(Node *node)
{
qDebug() << __PRETTY_FUNCTION__;
if (m_activeNode!=0)
m_activeNode->setActive(false);
m_activeNode = node;
m_activeNode->setActive();
}
void GraphWidget::insertNode()
{
qDebug() << __PRETTY_FUNCTION__;
double angle(m_activeNode->calculateBiggestAngle());
qreal length(100);
qDebug() << "angle: ";
qDebug() << angle;
QPointF pos(length * cos(angle), length * sin(angle));
qDebug() << pos;
Node *node = new Node(this);
node->setHtml(QString("new node"));
m_scene->addItem(node);
node->setPos(m_activeNode->pos() +
// m_activeNode->boundingRect().center() +
pos);
m_nodeList.append(node);
m_scene->addItem(new Edge(m_activeNode, node));
}
void GraphWidget::showingAllNodeNumbers(const bool &show)
{
int i =0;
for (QList<Node *>::const_iterator it = m_nodeList.begin(); it != m_nodeList.end(); it++, i++)
dynamic_cast<Node*>(*it)->showNumber(i,show);
}
void GraphWidget::showingNodeNumbersBeginWithNumber(const int &number, const bool &show)
{
int i(0);
int hit(0);
for (QList<Node *>::const_iterator it = m_nodeList.begin(); it != m_nodeList.end(); it++, i++)
{
if (i == number)
{
hit++;
dynamic_cast<Node*>(*it)->showNumber(i,show,true);
m_followNode = dynamic_cast<Node*>(*it);
continue;
}
if (numberStartsWithNumber(i, number))
{
hit++;
dynamic_cast<Node*>(*it)->showNumber(i,show);
}
}
if (hit==1)
{
showingAllNodeNumbers(false);
if (m_activeNode)
m_activeNode->setActive(false);
m_activeNode = m_followNode;
m_activeNode->setActive();
m_showingNodeNumbers = false;
}
else if (hit == 0)
{
m_showingNodeNumbers = false;
showingAllNodeNumbers(false);
}
}
bool GraphWidget::numberStartsWithNumber(const int &number, const int &prefix)
{
return (QString::number(number)).startsWith(QString::number(prefix));
}