How to get the Qpoint of the widget by mouse click

[summit]

I have a widget and when i click my mouse on the widget i need to get the Qpoint local to the widget.

if i click on the left corner of the widget than the value should be 0 , 0.

This is my code.

if (event->button() == Qt::LeftButton) {
		if (widgetRender->underMouse()) {
			lastPoint = event->pos();
			QPoint point = widgetRender->mapFromGlobal(lastPoint);
			Sum_ScreenSpaceToWorldSpaceCoords  ScreenToWorldCoords;
			SumPoint p;
			p.x = point.x();
			p.y = point.y();
			ScreenToWorldCoords.PrintMousePos(p);

		}
	}
`![everest_IMG.png](https://ddgobkiprc33d.cloudfront.net/c43a3818-d186-4fe9-9e6a-31c0df8c6f36.png) 

The black region is the widget.

If i click on the left corner of the widget than i should get (0.0 , 0.0)

[summit]

@KroMignon i have updated my code where i am using mapfromGlobal but i do not get 0,0 when i click on the left corner of the widget.

[KroMignon]

@summit Did you try to use QWidget::mapFromGlobal() ?
=> https://doc.qt.io/qt-5/qwidget.html#mapFromGlobal

[summit]

@KroMignon i have updated my code where i am using mapfromGlobal but i do not get 0,0 when i click on the left corner of the widget.

[KroMignon]

@summit I have some difficulties to understand what exactly you are doing.

From where did you get the mouse event?
Are those coordinates global or are they from another QWidget?
If they are global QWidget::mapFromGlobal() should do the job, if they are from another widget QWidget::mapFrom() should be used.

[summit]

This post is deleted!

[KroMignon]

@summit said in How to get the Qpoint of the widget by mouse click:

The mouse coordinates are global coordinates from the
void mousePressEvent(QMouseEvent *event)

Sorry, my question was not clear: how do you register this function to get mouse events?
I am not a QWidget expert, so maybe I am wrong.

The way I would do it is to add a global event listener to get mouse events:

• create a QObject class to handle the event

class MouseEventFilter : public QObject
{
    Q_OBJECT
public:
    explicit MouseEventFilter(QObject *parent = 0);

public:
    bool eventFilter(QObject *object, QEvent *event);
};

• register this class app to get all events

qApp->installEventFilter(new MouseEventFilter(qApp));