Accessing Event Arguments?

[BnMcG]

Hi all,

In C#, when using an event handler, it will have a specific name (eg: "onPressEvent mouseclick()" - and you can then access various properties by calling mouseclick.etc() - in C++/QT I have:

void MapViewer::mousePressEvent(QMouseEvent *event)

void MapViewer::mousePressEvent(QMouseEvent *event)

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However, I don't know how to access event or any of its methods, like documented here: http://doc.qt.digia.com/qt/qmouseeve...blic-functions

Can anybody shed any light on this?

Regards,
Ben.

[pkj]

class QMouseEvent has been passed as an argument. Use it to access properties of QMouseEvent.
Supposing MapViewer is a subclass of QWidget and you have reimplemented the mousePressEvent, then all the mouse press events on widget will have your reimplemented function called.

[anda_skoa]

As pkj said, you have the event as a function argument and it is a normal object, so methods are called like on any other C++ object

QPoint position = event->pos(); // where inside your widget the press happend
 
switch ( event->button() ) {
  case Qt::LeftButton: // left button pressed
    break;
  case Qt::RightButton: // right button pressed
    break;
  case Qt:MiddleButton: // middle button pressed
    break;
 
  default: // dont care
    break;
}

QPoint position = event->pos(); // where inside your widget the press happend

switch ( event->button() ) {
  case Qt::LeftButton: // left button pressed
    break;
  case Qt::RightButton: // right button pressed
    break;
  case Qt:MiddleButton: // middle button pressed
    break;

  default: // dont care
    break;
}

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Cheers,
_