mousePressEvent is based on the geometry ? how can i make the geometry be a triangle ?

opengpu

mousePressEvent is based on the geometry? how can i make the geometry be a triangle?
because i draw a triangle in paintEvent. and i setFixedSize by the triangle's width and height.
however i found while i deal with 2 overlapped QWidget(triangle) mouseEvent, it's wrong.
eg. presisely i clicked on the lower triangle's some area point, however that point is belong to the upper triangle's rect, so the mouseEvent is taken by the upper one...but actually i want the lower one respond that click.

J.Hilk

@opengpu I don't think you actually can change it from a rectangle into anything else.

However you could store you triangle shape inside a QPolygon and check the point during the mousePress event via QPolygon::containsPoint if it's inside the shape or not.

sierdzio

@opengpu said in mousePressEvent is based on the geometry? how can i make the geometry be a triangle?:

how can i make the geometry be a triangle?

You can't. Bounding rect is always a rectangle. What you can do is to check if there is something painted under the mouse cursor in the top-level triangle, and if not ignore the event (set accepted to false) - then it will be sent to next triangle below it.

opengpu

i now solved the visual problem by using raise() or lower().
and the mouseEvent is not going down directly to the lower one.
i am sorry, but i don't quite understand ur method, how can i "ignore the event (set accepted to false)" in mousePressEvent?

sierdzio

void mousePressEvent(QMouseEvent *event) {
  if (mouse is not above triangle shape)
    event->setAccepted(false);
}

opengpu

i tried, but not work, the lower one doesnot revieve the event.

class Triangle
{
    void mousePressEven(QMouseEvent* e)
    {
        if (m_polygon.containsPoint(mapFromGlobal(e->globalPos()), Qt::OddEvenFill))
        {
             m_pressed = true;
             m_lastPos = e->globalPos();
             raise();
        }
        else
        {
            lower();
            e->setAccepted(false);
            //return QWidget::mousePreddEvent(e); //whether do this or not, both not work.
         }
    }
}

opengpu

This post is deleted!

opengpu

@sierdzio hello?
anyone help?

sierdzio

@opengpu said in mousePressEvent is based on the geometry ? how can i make the geometry be a triangle ?:

@sierdzio hello?
anyone help?

I don't have more ideas. If I had, I would have replied.