Problem with window-viewport coordinate

[damon_1990]

Hi. I have a problem with window-viewport coordinates. In my code I draw a polygon:

static const int upPoints_p[4][2] = {
        { 49, -49 }, { -49, -49 },
        { -10, -10 }, { 10, -10 }
    };
 
QPolygon up_p(4, &upPoints_p[0][0]);
painter.setWindow( -50, -50, 100, 100);
painter.drawPolygon(up_p);

static const int upPoints_p[4][2] = {
        { 49, -49 }, { -49, -49 },
        { -10, -10 }, { 10, -10 }
    };

QPolygon up_p(4, &upPoints_p[0][0]);
painter.setWindow( -50, -50, 100, 100);
painter.drawPolygon(up_p);

To copy to clipboard, switch view to plain text mode 

and next, I would like to check mousePressEvent:

QPoint point = event->pos();
if( up_p.containsPoint(point, Qt::OddEvenFill) )
 {
 
 }

QPoint point = event->pos();
if( up_p.containsPoint(point, Qt::OddEvenFill) )
 {
                  
 }

To copy to clipboard, switch view to plain text mode 

but I have different coordinate. Can someone help me fix my code?

[pkj]

The event->pos() gives you co-ordinates in the widget world co-ordinates. You perhaps want co-ordinates of mouse click in way you have set the window.
After having done setWindow() call painter.transform().inverted().map(event->pos()) in paint function. This will give you the co-ordinates in your world.

[damon_1990]

Thanks for answer. So, I change my code:

void Diagram::mousePressEvent(QMouseEvent *event)
{
	     QPoint point = event->pos();
 
       QPainter painter(&pixmap);
       painter.setWindow(-50, -50, 100, 100);
 
			 QPoint out = painter.transform().inverted().map(event->pos());
 
       qDebug() << point.x() << point.y();
       qDebug() << out.x() << out.y();
}

void Diagram::mousePressEvent(QMouseEvent *event)
{
	     QPoint point = event->pos();

       QPainter painter(&pixmap);
       painter.setWindow(-50, -50, 100, 100);

			 QPoint out = painter.transform().inverted().map(event->pos());

       qDebug() << point.x() << point.y();
       qDebug() << out.x() << out.y();
}

To copy to clipboard, switch view to plain text mode 

but I still get the same value, for example:

188 158 
188 158

188 158 
188 158

To copy to clipboard, switch view to plain text mode 

and I can't check this condition

up_p.containsPoint(out, Qt::OddEvenFill)

up_p.containsPoint(out, Qt::OddEvenFill)

To copy to clipboard, switch view to plain text mode 

because I have polygons defiened like:

static const int upPoints_p[4][2] = {
        { 49, -49 }, { -49, -49 },
        { -10, -10 }, { 10, -10 }
 };

static const int upPoints_p[4][2] = {
        { 49, -49 }, { -49, -49 },
        { -10, -10 }, { 10, -10 }
 };

To copy to clipboard, switch view to plain text mode 

So, what am I doing wrong?