QGraphicsSceneMosueEvent is not working.
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I have this in header file,
#ifndef CUSTOMVIEW_H
#define CUSTOMVIEW_H
#include <QGraphicsView>
#include <QtWidgets>
#include <QWidget>
#include <QtGui>
#include <QGraphicsItem>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QGraphicsSceneMouseEvent>
#include <QDebug>
class CustomView : public QGraphicsView
{
public:
CustomView(QWidget* parent= 0);
protected:
void wheelEvent(QWheelEvent *event);
protected:
virtual void mousePressEvent(QGraphicsSceneMouseEvent *e);
};#endif // CUSTOMVIEW_H
now in cpp file:-
#include "customview.h"
CustomView::CustomView(QWidget *parent) : QGraphicsView(parent)
{}
void CustomView::wheelEvent(QWheelEvent *event)
{setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
double scaleFactor = 1.15;
if(event->delta() >0)
{
scale(scaleFactor, scaleFactor);
}
else{
scale(1/scaleFactor, 1/scaleFactor);
}
}void CustomView::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
int x = e->scenePos().x();
qDebug()<<x;
}///// But :( its not working.
I want to know position of mouse on image.
thanks for help -
mousePressEvent(QGraphicsSceneMouseEvent *event)is a method of QGraphicsItem not QGraphicsScene. You can reimplement certain methods (those that are marked virtual in the base class) when creating a subclass but you can't just reimplement them in wild like you are currently doing.From what I understand of your knowledge of C++, you should take a look at the basics like inheritance and polymorphism.
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Hi,
@khalistan said:
void CustomView::mousePressEvent(QGraphicsSceneMouseEvent *e)
There's no such method in QGraphicsView, it's
mouseMoveEvent(QMouseEvent * event) -
So how can I know mouse position on QGraphicsView. Only for graphics view.
I tried in MainWindow
void QGraphicsSceneMouseEvent::mousePressedEvent(*e){
int x = e.scenePos().x();
qDebug()x;
//Now its works but then i got warning "inconsistent dll linkage"
}
/I just want to know mouse position on graphics when I press mouse on it/
Thanks -
I already wrote it: the function you have to reimplement in your subclass is
mouseMoveEvent(QMouseEvent * event).As for the DLL linkage problem, you have an answer on your other thread.
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But Qt 5.0.1 version provide this method.
QGraphicsView::mousePressEvent(QGraphicsSceneMouseEvent *event){
qDebug()<<event->scenePos();
}
// This Work but with warning of dll//
but if i use in header file,
void mousePressEvent(QGraphicsSceneMouseEvent *event);
and then work on it in cpp
voind MainWindow::mousePressEvent(QGraphicsSceneMouseEvent *event){
qDebug()<<event->scenePos();
}
//Its show nothing
I am just new on QT.
I am web-programmer, so normally working with javascript/php.
So its completely new for me.
(I want to learn it, Can you help me.. I will pay you , if you will teach me, not so much but tille bit..My skype id is mand.robin
)
Thanks... I will be looking forward for your reply -
mousePressEvent(QGraphicsSceneMouseEvent *event)is a method of QGraphicsItem not QGraphicsScene. You can reimplement certain methods (those that are marked virtual in the base class) when creating a subclass but you can't just reimplement them in wild like you are currently doing.From what I understand of your knowledge of C++, you should take a look at the basics like inheritance and polymorphism.
-
mousePressEvent(QGraphicsSceneMouseEvent *event)is a method of QGraphicsItem not QGraphicsScene. You can reimplement certain methods (those that are marked virtual in the base class) when creating a subclass but you can't just reimplement them in wild like you are currently doing.From what I understand of your knowledge of C++, you should take a look at the basics like inheritance and polymorphism.
