Moving the Qt App

[Kris Revi]

in the mainwindow class in header i have

protected:
    void mousePressEvent(QMouseEvent *) override;

and then in the mainwindow cpp i have

void MainWindow::mousePressEvent(QMouseEvent * event)
{
    if(isMaximized() == false && event->type() == QEvent::MouseButtonPress && event->buttons() == Qt::LeftButton)
    {
        if (QWindow *window = windowHandle())
            window->startSystemMove();
    }

    _MousePos_x = event->x();
    _MousePos_y = event->y();
}

this works great and all but no matter where i click i can move the window! what i realy want is to check and only enable movement of window if (ui->frameTopBar) is clicked on but how?

[raven-worx]

@Kris-Revi
install an event filter on ui->frameTopBar

[Kris Revi]

im not 100% sure about this eventFilter stuff but i got this working for another thing

Header

bool eventFilter(QObject *object, QEvent *event) override;

Cpp

bool MainWindow::eventFilter(QObject *object, QEvent *event)
{
    if (object == (QObject*) ui->frameLedStripDeviceContainer)
    {
        if (event->type() == QEvent::Enter)
        {
            if ( devicemenucollapsed )
            {
                ui->frameDeviceMenu->setMinimumWidth(264);
                ui->frameDeviceMenu->setMaximumWidth(264);
                ui->labelLedStripDevices->setVisible(true);
                ui->labelLedStripDevicesSeparator->setVisible(false);
                ui->labelLedMatrixDevices->setVisible(true);
                ui->labelLedMatrixDevicesSeparator->setVisible(false);
                ui->labelSoftwareVersion->setVisible(true);

                for (QPushButton * dButtons : _DeviceButtonList)
                {
                    dButtons->setText( dButtons->property("orgtext").toString() );
                }
            }
        }
        else if (event->type() == QEvent::Leave)
        {
            if ( devicemenucollapsed )
            {
                ui->frameDeviceMenu->setMinimumWidth(52);
                ui->frameDeviceMenu->setMaximumWidth(52);
                ui->labelLedStripDevices->setVisible(false);
                ui->labelLedStripDevicesSeparator->setVisible(true);
                ui->labelLedMatrixDevices->setVisible(false);
                ui->labelLedMatrixDevicesSeparator->setVisible(true);
                ui->labelSoftwareVersion->setVisible(false);

                for (QPushButton * dButtons : _DeviceButtonList)
                {
                    dButtons->setText("");
                }
            }
        }
        return QWidget::eventFilter(object, event);
    }
}

ui->frameLedStripDeviceContainer->installEventFilter(this);

but how would i implement the QMouseEvent into the eventFilter thing?

[VRonin]

The event filter is 100% the correct solution but the quick and dirty one could be:

if(QRect(mapToGlobal(ui->frameTopBar->pos()),ui->frameTopBar->size()).contains(event->globalPos()))

[kshegunov]

@VRonin said in Moving the Qt App:

The event filter is 100% the correct solution but the quick and dirty one could be:

Maybe. Promoting to a custom widget is a possibility.

@Kris-Revi said in Moving the Qt App:

but how would i implement the QMouseEvent into the eventFilter thing?

Exactly like in the code you showed: you check the source, then check the event type and react to it however you like. An event filter just intercepts the events before they reach the original destination. Look up QMouseEvent, QEvent and especially its type property and eventFilter() together with installEventFilter, the latter you'd typically do after the call to setupUi.

[Kris Revi]

@kshegunov said in Moving the Qt App:

@VRonin said in Moving the Qt App:

The event filter is 100% the correct solution but the quick and dirty one could be:

Maybe. Promoting to a custom widget is a possibility.

@Kris-Revi said in Moving the Qt App:

but how would i implement the QMouseEvent into the eventFilter thing?

Exactly like in the code you showed: you check the source, then check the event type and react to it however you like. An event filter just intercepts the events before they reach the original destination. Look up QMouseEvent, QEvent and especially its type property and eventFilter() together with installEventFilter, the latter you'd typically do after the call to setupUi.

thanks for that! im a bit slow! but your explanation helped me actually! :) got it working fine now!