handle mouse events for touchscreen use

Jasuramme

Good day, all!
I have touchscreen on device I program for.
And there are some issues, when I press the screen with fingers. Sometimes it generates few wrong clicks.
So I try to handle these first clicks with global eventFilter. First few clicks it forbids to process mousePress event. And after some time, it allows to do it.

I have some problem there.
So, lets say, user click on point outside the button and later on move finger in, I post mousePress event and mouseRelease event straight away. mousePress achive button, but mouseRelease doesn't! So button is always on after that. What would stop button to receive mouseRelease? I thought, that some enter events, but it's not.
Advice me please, if you can, what could cause it.

There is some code:

function to send press event back to application

void MainWindow::sendCLick(int x, int y){
    QPoint qp = QPoint(x,y);
    QWidget *QW = qApp->widgetAt(qp);
    if (QW){
        clickSent=1;
        QPoint qp1=QW->mapFromGlobal(qp);
        QMouseEvent* evt1 = new QMouseEvent(QEvent::MouseButtonPress,
                                        qp1,
                                        qp,
                                        Qt::LeftButton,
                                        Qt::LeftButton,
                                        Qt::NoModifier);
        QCoreApplication::postEvent(QW,evt1);
    }
}

function to send release event

void MainWindow::sendRelease(int x, int y){
    QPoint qp = QPoint(x,y);
    QWidget *QW = qApp->widgetAt(qp);
    if (QW){
        QPoint qp1=QW->mapFromGlobal(qp);
        QMouseEvent* evt1 = new QMouseEvent(QEvent::MouseButtonRelease,
                                        qp1,
                                        qp,
                                        Qt::LeftButton,
                                        Qt::LeftButton,
                                        Qt::NoModifier);
   }
}

There is my global event filter

bool MainWindow::eventFilter(QObject *obj, QEvent *evt){
    if (evt->type()==QEvent::MouseButtonPress){
        if (clickSent){
            clickSent=0;
            QPoint qp=QCursor::pos();
            sendRelease(qp.rx(),qp.ry());
            return QMainWindow::eventFilter(obj,evt);
        }

        if (!clickedOn){
            timeAfterClick=0;
            QPoint pos=QCursor::pos();
            pseudoMouseX=pos.rx();
            pseudoMouseY=pos.ry();
            clickedOn=1;
        }
        return true;

    }

    if (evt->type()==QEvent::MouseButtonRelease){
        if ((!QApplication::mouseButtons())&&clickedOn){
            clickedOn=0;
        }
    }
    return QMainWindow::eventFilter(obj,evt);
}

And after some time I sent these events by timer

pseudoMouseX=CCur.rx();
pseudoMouseY=CCur.ry();
timeAfterClick++;
if (timeAfterClick>10){
    timeAfterClick=1;
    clickSent=1;
    sendCLick(pseudoMouseX,pseudoMouseY);
    sendRelease(pseudoMouseX,pseudoMouseY);

SGaist

Hi and welcome to devnet,

Something's not clear here, why do you need to generate your own mouse event ?