[SOLVED] Constantly updating tooltip text without moving the mouse

butterface

Hi,

is there a way to update the text of a tooltip which is already visible without any extra event (no mouse movement).

Thanks

ScottR

I haven't tried it, but couldn't you create a timer when you get the tooltip event and use the timer to update the tooltip?

butterface

I update the tooltip in the painEvent but it seems that it rendered only once so the updates are not displayed.

ScottR

Here's a simple example of how it can work.

Find the tooltip example.

To Sortingbox.h, add:

private:
QPoint pos;

To Sortingbox.cpp, add:
void SortingBox::update()
{
static int ncalls = 0;
QString tt;
tt = QString("Tooltip #%1").arg(ncalls++);
QToolTip::showText(pos, tt);
}
And change the event method to this:
bool SortingBox::event(QEvent *event)
{
if (event->type() == QEvent::ToolTip) {
QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event);
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
timer->start(500);
pos = helpEvent->globalPos();
int index = itemAt(helpEvent->pos());
if (index != -1) {
QToolTip::showText(helpEvent->globalPos(), shapeItems[index].toolTip());
} else {
QToolTip::hideText();
event->ignore();
}

    return true;
}
return QWidget::event(event);

}

The tooltip for items will update constantly (every 1/2 second) with "Tooltip #x" with x incrementing from 0.

ScottR

Sorry about the formatting.

sierdzio

[quote author="ScottR" date="1390323723"]Sorry about the formatting.[/quote]

Just put your code between '@' tags and it will be fine :)

butterface

Thanks for the code but I found another way. This works because I am changing the tooltips text every time my values change so I listen to QEvent::ToolTipChange. This leads to the following code:

@
bool MyClass::event(QEvent *ev)
{
if (ev->type() == QEvent::ToolTip)
{
QHelpEvent *helpEvent = static_cast<QHelpEvent *>(ev);
m_ToolTipPos = helpEvent->globalPos();
}
else if (ev->type() == QEvent::ToolTipChange)
{
if (underMouse() && !m_ToolTipPos.isNull())
QToolTip::showText(m_ToolTipPos, toolTip());
}
return QWidget::event(ev);
}
@