Unsolved handle mouse events for touchscreen use
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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);
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Hi and welcome to devnet,
Something's not clear here, why do you need to generate your own mouse event ?