Huge refactor, graph logic has been taken out from GraphWidget to the new GraphLogic class. Refactor is not over: GraphWidget has too many functions still.
Denes Matetelki
14 years ago
parent
f7f2d3145a
commit
c16240f8e4
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#ifndef GRAPHLOGIC_H
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#define GRAPHLOGIC_H
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#include <QObject>
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#include "node.h"
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#include "graphwidget.h"
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class GraphWidget;
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class GraphLogic : public QObject
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{
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Q_OBJECT
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public:
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explicit GraphLogic(GraphWidget *parent = 0);
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// functions on nodes
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void addFirstNode();
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void removeAllNodes();
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void setActiveNode(Node *node);
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bool readContentFromXmlFile(const QString &fileName);
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void writeContentToXmlFile(const QString &fileName);
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void writeContentToPngFile(const QString &fileName);
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bool editing() const;
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void passKey(QKeyEvent *event = 0);
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// undo-able commands:
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void insertNode();
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void removeNode(const bool &subtree = false);
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void scaleUp(const bool &subtree = false);
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void scaleDown(const bool &subtree = false);
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void setNodeColor(const QColor &color, const bool &subtree = false);
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void setNodeTextColor(const QColor &color, const bool &subtree = false);
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void addEdge();
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void removeEdge();
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void hintMode();
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void insertPicture(const QString &picture);
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void move(const int &x, const int &y, const bool &subtree = false);
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void appendNumber(const int &unm);
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void delNumber();
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void applyNumber();
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void nodeColor(const bool &subtree = false);
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void nodeTextColor(const bool &subtree = false);
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public slots:
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void nodeChanged();
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void nodeSelected();
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void nodeEdited(QKeyEvent *event = 0);
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void nodeMoved(QGraphicsSceneMouseEvent *event);
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void nodeLostFocus();
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signals:
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void contentChanged();
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void notification(const QString &msg);
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private:
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Node *nodeFactory();
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void selectNode(Node *node);
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// functions on the edges
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QList<Edge *> allEdges() const;
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void addEdge(Node *source, Node *destination);
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void removeEdge(Node* source, Node *destination);
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// hint mode's nodenumber handling functions
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void showNodeNumbers();
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void showingAllNodeNumbers(const bool &show = true);
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void showingNodeNumbersBeginWithNumber(const int &prefix,
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const bool &show = true);
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GraphWidget *m_graphWidget;
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QList<Node *> m_nodeList;
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Node *m_activeNode;
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bool m_showingNodeNumbers;
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QString m_hintNumber;
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Node *m_hintNode;
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bool m_editingNode;
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bool m_edgeAdding;
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bool m_edgeDeleting;
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};
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#endif // GRAPHLOGIC_H
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@ -0,0 +1,784 @@
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#include "include/graphwidget.h"
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#include <QtXml>
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#include <QColorDialog>
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GraphLogic::GraphLogic(GraphWidget *parent)
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: QObject(parent)
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, m_graphWidget(parent)
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, m_activeNode(0)
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, m_showingNodeNumbers(false)
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, m_hintNumber("")
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, m_hintNode(0)
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, m_editingNode(false)
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, m_edgeAdding(false)
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, m_edgeDeleting(false)
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{
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}
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void GraphLogic::addFirstNode()
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{
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Node *node = nodeFactory();
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node->setHtml(
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QString("<img src=:/qtmindmap.svg width=50 height=50></img>"));
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m_activeNode = m_nodeList.first();
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m_activeNode->setBorder();
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}
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void GraphLogic::removeAllNodes()
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{
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foreach(Node *node, m_nodeList)
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delete node;
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m_nodeList.clear();
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m_activeNode = 0;
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m_hintNode = 0;
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}
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void GraphLogic::setActiveNode(Node *node)
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{
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if (m_activeNode!=0)
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m_activeNode->setBorder(false);
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m_activeNode = node;
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if (m_activeNode)
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m_activeNode->setBorder();
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}
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bool GraphLogic::readContentFromXmlFile(const QString &fileName)
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{
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// open & parse XML file
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QDomDocument doc("QtMindMap");
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QFile file(fileName);
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if (!file.open(QIODevice::ReadOnly))
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{
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emit notification(tr("Couldn't read file."));
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return false;
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}
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if (!doc.setContent(&file))
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{
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emit notification(tr("Couldn't parse XML file."));
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file.close();
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return false;
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}
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file.close();
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QDomElement docElem = doc.documentElement();
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// add nodes
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QDomNodeList nodes = docElem.childNodes().item(0).childNodes();
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for (unsigned int i = 0; i < nodes.length(); i++)
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{
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QDomElement e = nodes.item(i).toElement();
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if(!e.isNull())
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{
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Node *node = nodeFactory();
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node->setHtml(e.attribute("htmlContent"));
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node->setPos(e.attribute("x").toFloat(),
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e.attribute("y").toFloat());
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node->setScale(e.attribute("scale").toFloat(),
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m_graphWidget->sceneRect());
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node->setColor(QColor(e.attribute("bg_red").toFloat(),
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e.attribute("bg_green").toFloat(),
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e.attribute("bg_blue").toFloat()));
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node->setTextColor(QColor(e.attribute("text_red").toFloat(),
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e.attribute("text_green").toFloat(),
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e.attribute("text_blue").toFloat()));
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}
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}
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// add edges
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QDomNodeList edges = docElem.childNodes().item(1).childNodes();
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for (unsigned int i = 0; i < edges.length(); i++)
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{
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QDomElement e = edges.item(i).toElement();
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if(!e.isNull())
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{
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Node *source = m_nodeList[e.attribute("source").toInt()];
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Node *destination = m_nodeList[e.attribute("destination").toInt()];
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Edge *edge = new Edge(source, destination);
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source->addEdge(edge, true);
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destination->addEdge(edge, false);
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edge->setColor(QColor(e.attribute("red").toFloat(),
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e.attribute("green").toFloat(),
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e.attribute("blue").toFloat()));
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edge->setWidth(e.attribute("width").toFloat());
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edge->setSecondary(e.attribute("secondary").toInt() );
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m_graphWidget->scene()->addItem(edge);
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}
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}
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// test the first node the active one
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m_activeNode = m_nodeList.first();
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m_activeNode->setBorder();
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m_activeNode->setFocus();
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m_graphWidget->show();
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return true;
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}
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void GraphLogic::writeContentToXmlFile(const QString &fileName)
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{
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// create XML doc object
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QDomDocument doc("QtMindMap");
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QDomElement root = doc.createElement("qtmindmap");
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doc.appendChild( root );
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// nodes
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QDomElement nodes_root = doc.createElement("nodes");
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root.appendChild(nodes_root);
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foreach(Node *node, m_nodeList)
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{
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QDomElement cn = doc.createElement("node");
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// no need to store ID: parsing order is preorder.
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// cn.setAttribute( "id", QString::number(m_nodeList.indexOf(node)));
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cn.setAttribute( "x", QString::number(node->pos().x()));
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cn.setAttribute( "y", QString::number(node->pos().y()));
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cn.setAttribute( "htmlContent", node->toHtml());
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cn.setAttribute( "scale", QString::number(node->scale()));
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cn.setAttribute( "bg_red", QString::number(node->color().red()));
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cn.setAttribute( "bg_green", QString::number(node->color().green()));
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cn.setAttribute( "bg_blue", QString::number(node->color().blue()));
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cn.setAttribute( "text_red", QString::number(node->textColor().red()));
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cn.setAttribute( "text_green",
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QString::number(node->textColor().green()));
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cn.setAttribute( "text_blue",
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QString::number(node->textColor().blue()));
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nodes_root.appendChild(cn);
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}
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//edges
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QDomElement edges_root = doc.createElement("edges");
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root.appendChild(edges_root);
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foreach(Edge *edge, allEdges())
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{
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QDomElement cn = doc.createElement("edge");
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cn.setAttribute( "source",
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QString::number(m_nodeList.indexOf(edge->sourceNode())));
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cn.setAttribute( "destination",
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QString::number(m_nodeList.indexOf(edge->destNode())));
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cn.setAttribute( "red", QString::number(edge->color().red()));
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cn.setAttribute( "green", QString::number(edge->color().green()));
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cn.setAttribute( "blue", QString::number(edge->color().blue()));
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cn.setAttribute( "width", QString::number(edge->width()));
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cn.setAttribute( "secondary", QString::number(edge->secondary()));
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edges_root.appendChild(cn);
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}
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// write XML doc object to file
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QFile file(fileName);
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if (!file.open(QIODevice::WriteOnly))
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{
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emit notification(tr("Couldn't open file to write."));
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return;
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}
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QTextStream ts( &file );
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ts << doc.toString();
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file.close();
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// show a statusBar message to the user
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emit notification(tr("Saved."));
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}
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void GraphLogic::writeContentToPngFile(const QString &fileName)
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{
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QImage img(m_graphWidget->scene()->sceneRect().width(),
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m_graphWidget->scene()->sceneRect().height(),
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QImage::Format_ARGB32_Premultiplied);
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QPainter painter(&img);
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painter.setRenderHint(QPainter::Antialiasing);
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// Strange that I have to set this, and scene->render() does not do this
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m_graphWidget->scene()->setBackgroundBrush(GraphWidget::m_paper);
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m_graphWidget->scene()->render(&painter);
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painter.setBackground(GraphWidget::m_paper);
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painter.end();
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img.save(fileName);
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// show a statusBar message to the user
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emit notification(tr("MindMap exported as ") + fileName);
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}
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bool GraphLogic::editing() const
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{
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return m_editingNode;
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}
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void GraphLogic::passKey(QKeyEvent *event)
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{
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m_activeNode->keyPressEvent(event);
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}
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void GraphLogic::insertNode()
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{
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nodeLostFocus();
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if (!m_activeNode)
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{
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emit notification(tr("No active node."));
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return;
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}
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// get the biggest angle between the edges of the Node.
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double angle(m_activeNode->calculateBiggestAngle());
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// let the distance between the current and new Node be 100 pixels
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qreal length(100);
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QPointF pos(length * cos(angle), length * sin(angle));
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QPointF newPos(m_activeNode->sceneBoundingRect().center() +
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pos - Node::newNodeCenter);
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QRectF rect (m_graphWidget->scene()->sceneRect().topLeft(),
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m_graphWidget->scene()->sceneRect().bottomRight()
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- Node::newNodeBottomRigth);
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if (!rect.contains(newPos))
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{
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emit notification(tr("New node would be placed outside of the scene"));
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return;
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}
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// add a new node which inherits the color and textColor
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Node *node = nodeFactory();
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node->setColor(m_activeNode->color());
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node->setTextColor(m_activeNode->textColor());
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node->setHtml(QString(""));
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node->setPos(newPos);
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addEdge(m_activeNode, node);
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// set it the active Node and editable, so the user can edit it at once
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setActiveNode(node);
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nodeEdited();
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emit contentChanged();
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// it we are in hint mode, the numbers shall be re-calculated
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if (m_showingNodeNumbers)
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showNodeNumbers();
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}
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void GraphLogic::removeNode(const bool &subtree)
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{
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if (!m_activeNode)
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{
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emit notification(tr("No active node."));
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return;
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}
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if (m_activeNode == m_nodeList.first())
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{
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emit notification(tr("Base node cannot be deleted."));
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return;
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}
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// remove just the active Node or it's subtree too?
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QList <Node *> nodeList;
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if (subtree)
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{
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nodeList = m_activeNode->subtree();
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}
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else
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{
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nodeList.push_back(m_activeNode);
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}
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foreach(Node *node, nodeList)
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{
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if (m_hintNode==node)
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m_hintNode=0;
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m_nodeList.removeAll(node);
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delete node;
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}
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m_activeNode = 0;
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emit contentChanged();
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// it we are in hint mode, the numbers shall be re-calculated
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if (m_showingNodeNumbers)
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showNodeNumbers();
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}
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void GraphLogic::scaleUp(const bool &subtree)
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{
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if (!m_activeNode)
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{
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emit notification(tr("No active node."));
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return;
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}
|
||||||
|
|
||||||
|
if (subtree)
|
||||||
|
{
|
||||||
|
QList <Node *> nodeList = m_activeNode->subtree();
|
||||||
|
foreach(Node *node, nodeList)
|
||||||
|
node->setScale(qreal(1.2), m_graphWidget->sceneRect());
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
m_activeNode->setScale(qreal(1.2),m_graphWidget->sceneRect());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::scaleDown(const bool &subtree)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (subtree)
|
||||||
|
{
|
||||||
|
QList <Node *> nodeList = m_activeNode->subtree();
|
||||||
|
foreach(Node *node, nodeList)
|
||||||
|
node->setScale(qreal(1 / 1.2),m_graphWidget->sceneRect());
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
m_activeNode->setScale(qreal(1 / 1.2),m_graphWidget->sceneRect());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::setNodeColor(const QColor &color, const bool &subtree)
|
||||||
|
{
|
||||||
|
QList <Node *> nodeList;
|
||||||
|
if (subtree)
|
||||||
|
{
|
||||||
|
nodeList = m_activeNode->subtree();
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
nodeList.push_back(m_activeNode);
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach(Node *node, nodeList)
|
||||||
|
{
|
||||||
|
node->setColor(color);
|
||||||
|
foreach (Edge * edge, node->edgesToThis(false))
|
||||||
|
edge->setColor(color);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::setNodeTextColor(const QColor &color, const bool &subtree)
|
||||||
|
{
|
||||||
|
QList <Node *> nodeList;
|
||||||
|
if (subtree)
|
||||||
|
{
|
||||||
|
nodeList = m_activeNode->subtree();
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
nodeList.push_back(m_activeNode);
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach(Node *node, nodeList)
|
||||||
|
node->setTextColor(color);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::addEdge()
|
||||||
|
{
|
||||||
|
emit notification(tr("Add edge: select destination node."));
|
||||||
|
m_edgeAdding = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::removeEdge()
|
||||||
|
{
|
||||||
|
emit notification(tr("Delete edge: select other end-node."));
|
||||||
|
m_edgeDeleting = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::hintMode()
|
||||||
|
{
|
||||||
|
// vimperator-style node selection with keys.
|
||||||
|
// show or hide the numbers if we enter/leave this mode.
|
||||||
|
m_showingNodeNumbers = !m_showingNodeNumbers;
|
||||||
|
if (!m_showingNodeNumbers)
|
||||||
|
{
|
||||||
|
showingAllNodeNumbers(false);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
m_hintNumber.clear();
|
||||||
|
showNodeNumbers();
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void GraphLogic::insertPicture(const QString &picture)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
m_activeNode->insertPicture(picture);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::move(const int &x, const int &y, const bool &subtree)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (subtree)
|
||||||
|
{
|
||||||
|
QList <Node *> nodeList = m_activeNode->subtree();
|
||||||
|
foreach(Node *node, nodeList)
|
||||||
|
node->moveBy(x, y);
|
||||||
|
|
||||||
|
emit contentChanged();
|
||||||
|
}
|
||||||
|
else // Move just the active Node.
|
||||||
|
{
|
||||||
|
m_activeNode->moveBy(x, y);
|
||||||
|
emit contentChanged();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::appendNumber(const int &num)
|
||||||
|
{
|
||||||
|
if (!m_showingNodeNumbers)
|
||||||
|
return;
|
||||||
|
|
||||||
|
m_hintNumber.append(QString::number(num));
|
||||||
|
|
||||||
|
showingAllNodeNumbers(false);
|
||||||
|
showingNodeNumbersBeginWithNumber(m_hintNumber.toInt(), true);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::delNumber()
|
||||||
|
{
|
||||||
|
if (!m_showingNodeNumbers && m_hintNumber.isEmpty())
|
||||||
|
return;
|
||||||
|
|
||||||
|
m_hintNumber.remove(m_hintNumber.length()-1,1);
|
||||||
|
showNodeNumbers();
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::applyNumber()
|
||||||
|
{
|
||||||
|
if (m_hintNode && m_showingNodeNumbers)
|
||||||
|
selectNode(m_hintNode);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::nodeColor(const bool &subtree)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// popup a color selector dialogm def color is the curr one.
|
||||||
|
QColorDialog dialog(m_graphWidget);
|
||||||
|
dialog.setWindowTitle(tr("Select node color"));
|
||||||
|
dialog.setCurrentColor(m_activeNode->color());
|
||||||
|
if (!dialog.exec())
|
||||||
|
return;
|
||||||
|
|
||||||
|
setNodeColor(dialog.selectedColor(), subtree);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::nodeTextColor(const bool &subtree)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// popup a color selector dialogm def color is the curr one.
|
||||||
|
QColorDialog dialog(m_graphWidget);
|
||||||
|
dialog.setWindowTitle(tr("Select text color"));
|
||||||
|
dialog.setCurrentColor(m_activeNode->textColor());
|
||||||
|
if (!dialog.exec())
|
||||||
|
return;
|
||||||
|
|
||||||
|
setNodeTextColor(dialog.selectedColor(), subtree);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::nodeChanged()
|
||||||
|
{
|
||||||
|
emit contentChanged();
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::nodeSelected()
|
||||||
|
{
|
||||||
|
// if node == 0 then nodeSelected invoked after a signal from a Node
|
||||||
|
selectNode(dynamic_cast<Node*>(QObject::sender()));
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::nodeEdited(QKeyEvent *event)
|
||||||
|
{
|
||||||
|
Q_UNUSED(event)
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
m_editingNode = true;
|
||||||
|
m_activeNode->setEditable();
|
||||||
|
m_graphWidget->scene()->setFocusItem(m_activeNode);
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::nodeMoved(QGraphicsSceneMouseEvent *event)
|
||||||
|
{
|
||||||
|
// move just the active Node, or it's subtree too?
|
||||||
|
QList <Node *> nodeList;
|
||||||
|
if (event->modifiers() & Qt::ControlModifier &&
|
||||||
|
event->modifiers() & Qt::ShiftModifier)
|
||||||
|
{
|
||||||
|
nodeList = m_activeNode->subtree();
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
nodeList.push_back(m_activeNode);
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach(Node *node, nodeList)
|
||||||
|
node->setPos(node->pos() + event->scenePos() - event->lastScenePos());
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void GraphLogic::nodeLostFocus()
|
||||||
|
{
|
||||||
|
if (m_editingNode)
|
||||||
|
{
|
||||||
|
m_editingNode = false;
|
||||||
|
if (m_activeNode)
|
||||||
|
{
|
||||||
|
m_activeNode->setEditable(false);
|
||||||
|
m_activeNode->update();
|
||||||
|
}
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (m_edgeAdding)
|
||||||
|
{
|
||||||
|
m_edgeAdding = false;
|
||||||
|
emit notification(tr("Edge adding cancelled."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (m_edgeDeleting)
|
||||||
|
{
|
||||||
|
m_edgeDeleting = false;
|
||||||
|
emit notification(tr("Edge deleting cancelled."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if(m_showingNodeNumbers)
|
||||||
|
{
|
||||||
|
m_hintNumber.clear();
|
||||||
|
showingAllNodeNumbers(false);
|
||||||
|
m_showingNodeNumbers = false;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
Node * GraphLogic::nodeFactory()
|
||||||
|
{
|
||||||
|
Node *node = new Node();
|
||||||
|
|
||||||
|
connect(node, SIGNAL(nodeChanged()), this, SLOT(nodeChanged()));
|
||||||
|
connect(node, SIGNAL(nodeSelected()), this, SLOT(nodeSelected()));
|
||||||
|
connect(node, SIGNAL(nodeEdited()), this, SLOT(nodeEdited()));
|
||||||
|
connect(node, SIGNAL(nodeMoved(QGraphicsSceneMouseEvent*)),
|
||||||
|
this, SLOT(nodeMoved(QGraphicsSceneMouseEvent*)));
|
||||||
|
connect(node, SIGNAL(nodeLostFocus()), this, SLOT(nodeLostFocus()));
|
||||||
|
|
||||||
|
m_graphWidget->scene()->addItem(node);
|
||||||
|
m_nodeList.append(node);
|
||||||
|
|
||||||
|
return node;
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::selectNode(Node *node)
|
||||||
|
{
|
||||||
|
// leave hint mode
|
||||||
|
showingAllNodeNumbers(false);
|
||||||
|
m_showingNodeNumbers = false;
|
||||||
|
|
||||||
|
if (m_edgeAdding)
|
||||||
|
{
|
||||||
|
addEdge(m_activeNode, node);
|
||||||
|
m_edgeAdding = false;
|
||||||
|
}
|
||||||
|
else if (m_edgeDeleting)
|
||||||
|
{
|
||||||
|
removeEdge(m_activeNode, node);
|
||||||
|
m_edgeDeleting = false;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
setActiveNode(node);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
QList<Edge *> GraphLogic::allEdges() const
|
||||||
|
{
|
||||||
|
QList<Edge *> list;
|
||||||
|
|
||||||
|
// GraphWidget has a list of Nodes only.
|
||||||
|
// Each Node maintains a list of it's own Edges.
|
||||||
|
// We iterate through the list of Nodes and call Node::edgesFrom() on them.
|
||||||
|
// edgesFrom(exludeSecundaries=false) return a list of edges (including
|
||||||
|
// secondary edges) which starts from this Node.
|
||||||
|
foreach(Node * node, m_nodeList)
|
||||||
|
list.append(node->edgesFrom(false));
|
||||||
|
|
||||||
|
return list;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void GraphLogic::addEdge(Node *source, Node *destination)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (destination == m_nodeList.first())
|
||||||
|
{
|
||||||
|
setActiveNode(destination);
|
||||||
|
emit notification(
|
||||||
|
tr("Root element cannot be an edge target."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (source->isConnected(destination))
|
||||||
|
{
|
||||||
|
setActiveNode(destination);
|
||||||
|
emit notification(
|
||||||
|
tr("There is already an edge between these two nodes."));
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
// aviod the graph beeing acyclic. (ok, Nodes having multiple parents)
|
||||||
|
bool sec(false);
|
||||||
|
if (!destination->edgesToThis().empty())
|
||||||
|
{
|
||||||
|
emit notification(
|
||||||
|
tr("The graph is acyclic, edge added as secondary edge."));
|
||||||
|
sec = true;
|
||||||
|
}
|
||||||
|
Edge *edge = new Edge(source, destination);
|
||||||
|
source->addEdge(edge, true);
|
||||||
|
destination->addEdge(edge, false);
|
||||||
|
|
||||||
|
edge->setColor(destination->color());
|
||||||
|
edge->setWidth(destination->scale()*2 + 1);
|
||||||
|
|
||||||
|
// The Edge is secondary, because the Node already has a parent
|
||||||
|
// (it is already a destination of another Edge)
|
||||||
|
edge->setSecondary(sec);
|
||||||
|
m_graphWidget->scene()->addItem(edge);
|
||||||
|
|
||||||
|
setActiveNode(destination);
|
||||||
|
emit contentChanged();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void GraphLogic::removeEdge(Node *source, Node *destination)
|
||||||
|
{
|
||||||
|
if (!m_activeNode)
|
||||||
|
{
|
||||||
|
emit notification(tr("No active node."));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!source->isConnected(destination))
|
||||||
|
{
|
||||||
|
setActiveNode(destination);
|
||||||
|
emit notification(tr("There no edge between these two nodes."));
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
source->deleteEdge(destination);
|
||||||
|
setActiveNode(destination);
|
||||||
|
emit contentChanged();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// re-draw numbers
|
||||||
|
void GraphLogic::showNodeNumbers()
|
||||||
|
{
|
||||||
|
if (m_hintNumber.isEmpty())
|
||||||
|
{
|
||||||
|
showingAllNodeNumbers(true);
|
||||||
|
m_nodeList.first()->showNumber(0,true,true);
|
||||||
|
m_hintNode = m_nodeList.first();
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
showingAllNodeNumbers(false);
|
||||||
|
showingNodeNumbersBeginWithNumber(m_hintNumber.toInt(), true);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// show/hide numbers on all nodes
|
||||||
|
void GraphLogic::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);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// show nodes numbers where number begins with 'prefix'
|
||||||
|
void GraphLogic::showingNodeNumbersBeginWithNumber(const int &prefix,
|
||||||
|
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 nodenumber == 'prefix' the node is selected
|
||||||
|
if (i == prefix)
|
||||||
|
{
|
||||||
|
hit++;
|
||||||
|
dynamic_cast<Node*>(*it)->showNumber(i,show,true);
|
||||||
|
m_hintNode = dynamic_cast<Node*>(*it);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// if 'i' starts with 'prefix'
|
||||||
|
if ((QString::number(i)).startsWith(QString::number(prefix)))
|
||||||
|
{
|
||||||
|
hit++;
|
||||||
|
dynamic_cast<Node*>(*it)->showNumber(i,show);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (hit==1)
|
||||||
|
{
|
||||||
|
selectNode(m_hintNode);
|
||||||
|
}
|
||||||
|
else if (hit == 0)
|
||||||
|
{
|
||||||
|
m_showingNodeNumbers = false;
|
||||||
|
showingAllNodeNumbers(false);
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in new issue