Adding tooltips to canvas items

[jnana]

Hi Every Body ,

I want to add tooltip to canvas items. I know how to add tooltips to widget objects. As canvas items are not derived from QWidget, therefore not able to add to it.

Needs all of your help.

Regard & Thanks

[jpn]

Inherit Q3CanvasView and override:
bool QWidget::event ( QEvent * e ) [virtual protected]

You can show a dynamic tooltip like this:

bool MyCanvasView::event(QEvent *event)
{
    if (event->type() == QEvent::ToolTip) {
        QHelpEvent *helpEvent = static_cast<QHelpEvent*>(event);
        // compare event position and canvas item positions
        // and set tooltip text accordingly
        QToolTip::showText(helpEvent->globalPos(), "");
    }
    return QWidget::event(event);
}

bool MyCanvasView::event(QEvent *event)
{
    if (event->type() == QEvent::ToolTip) {
        QHelpEvent *helpEvent = static_cast<QHelpEvent*>(event);
        // compare event position and canvas item positions
        // and set tooltip text accordingly
        QToolTip::showText(helpEvent->globalPos(), "");
    }
    return QWidget::event(event);
}

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[jnana]

Thanks JPN,

It is working fine.