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POmouserelease and move events of QWidget is not working
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copied!<p>Here i develoed a custom widget to print some shape. But here my MouseRelease and MouseMove event are not working.wh t is the problem of my code. As well as some Asserts are executed. please help me to solve this.</p> <p>This is my header file</p> <pre><code>//painter.h #ifndef PAINTER_H #define PAINTER_H #include <QWidget> #include <QGraphicsView> #include <math.h> #include <QVector> #include <QMouseEvent> #include <QPoint> class painter : public QWidget { Q_OBJECT private: enum Shape{CIRCLE,RECTENGEL,TRIANGEL} shape; QGraphicsView *graphic; QGraphicsScene *Scene; QPoint *start; QPoint *end; QPen *pen; QBrush *brush; QVector<QGraphicsItem*> *items; public: explicit painter(QWidget *parent = 0); void setSize(double width,double height); void setShape(Shape value); void addItem(); void clear(); void scale(); signals: public slots: protected: void mousePressEvent(QMouseEvent *event); void mouseMoveEvent(QMouseEvent *event); void mouseReleaseEvent(QMouseEvent *event); }; #endif // PAINTER_H </code></pre> <p>and this is my CPP file</p> <pre><code>//painter.cpp #include "painter.h" #include <QDebug> #include <QGraphicsView> #include <iterator> painter::painter(QWidget *parent) : QWidget(parent) { graphic = new QGraphicsView(this); Scene = new QGraphicsScene(this); pen = new QPen; brush = new QBrush; start = new QPoint; end = new QPoint; items = new QVector<QGraphicsItem*>(); graphic->setScene(Scene); //Scene->addEllipse(10,10,50,50,*pen,*brush);//Scene->addLine(0,0,1,1); // Scene->addRect(70,70,50,50,*pen,*brush); graphic->setSceneRect(0,0,500,500); Scene->addEllipse(20,20,20,20,*pen,*brush); } void painter::setSize(double width,double height) { graphic->setSceneRect(0,0,width,height); } void painter::setShape(Shape value) { if(value==CIRCLE) shape = CIRCLE; else if(value==RECTENGEL) shape = RECTENGEL; else if(value=TRIANGEL) shape=TRIANGEL; else throw("Invalid Shape"); } void painter::addItem() { QGraphicsItem *newItem; double length = sqrt(pow((double)(start->x()-end->x()),2)+ pow((double)(start->y()-end->y()),2)); if(shape==TRIANGEL) { // QPolygonF triangel; // triangel. // Scene->addPolygon(,pen,brush); } else if(shape==RECTENGEL) newItem = (QGraphicsItem*)Scene->addRect(end->x()-length,end->y()-length,2*length,2*length,*pen,*brush); else newItem = (QGraphicsItem*)Scene->addEllipse(end->x()-length,end->y()-length,2*length,2*length,*pen,*brush); items->push_back(newItem); } void painter::clear() { for(int i=0;i<items->size();i++) Scene->removeItem(items->at(i)); } void painter::scale() { } void painter::mousePressEvent(QMouseEvent *event) { end->setX(50); end->setY(50); start->setX(event->x()); start->setY(event->y()); shape = RECTENGEL; addItem(); } void painter::mouseMoveEvent(QMouseEvent *event) { qDebug("move"); } void painter::mouseReleaseEvent(QMouseEvent *event) { end->setX(event->x()); end->setY(event->y()); addItem(); } </code></pre>

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