Tooltip on item in tableview

[wysota]

return "Signal" and not data = "Signal". What is "data" anyway?

[steg90]

Hi,

Sorry wysota, data is QVariant and at the bottom of the function I return data. I set a breakpoint in my data method to break when the role is Qt::ToolTipRole, but it never breaks.

Regards,
Steve

[wysota]

It should if you didn't change the delegate. Could you show us the complete data() method?

[steg90]

Sure, here it is :

QVariant DACanTreeModel::data(const QModelIndex &index, int role) const
{
	QVariant data;
 
	if (!index.isValid())
         return QVariant();
	if(index.column() > 4 )
	{
		return QVariant();
	}
	if( role == Qt::ToolTipRole )
	{
		data = "Signal";
	}
	if( role == Qt::DisplayRole )
	{
		CDADcb::CSignal* pSignals;
		pSignals = (CDADcb::CSignal*)theApp->m_dcb.GetSignalList()->at(index.row()); 
		switch( index.column() )
		{
		case SIGNALNAME : {
					data = pSignals->name;
					break;
				 }
		case DATA : {
					data = pSignals->m_strRawData;
					break;
				 }
		case UNIT : {
					data = pSignals->unit;
				 }
				 break;
		case COUNT : {
					data = pSignals->m_nCount;
				 }
				 break;
		}
	}
	return data;
}

QVariant DACanTreeModel::data(const QModelIndex &index, int role) const
{
	QVariant data;

	if (!index.isValid())
         return QVariant();
	if(index.column() > 4 )
	{
		return QVariant();
	}
	if( role == Qt::ToolTipRole )
	{
		data = "Signal";
	}
	if( role == Qt::DisplayRole )
	{
		CDADcb::CSignal* pSignals;
		pSignals = (CDADcb::CSignal*)theApp->m_dcb.GetSignalList()->at(index.row()); 
		switch( index.column() )
		{
		case SIGNALNAME : {
					data = pSignals->name;
					break;
				 }
		case DATA : {
					data = pSignals->m_strRawData;
					break;
				 }
		case UNIT : {
					data = pSignals->unit;
				 }
				 break;
		case COUNT : {
					data = pSignals->m_nCount;
				 }
				 break;
		}
	}
	return data;
}

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Regards,
Steve

[steg90]

Sorry about this, the tool tip is now displaying...unfortunately it won't go away unless I click on the table...even if I move the mouse it won't disappear?!

Regards,
Steve

[wysota]

It could be wise to sometimes returning something else than the same text

[steg90]

I guess it is! It does now work. I must admit, I'd prefer a custom tooltip. Is it possible to set up a different delegate so when user hovers over an item, a custom tooltip appears instead of the standard one?

Kind regards,
Steve

[wysota]

What kind of custom tooltip? You can use rich text in your tooltips if you want. Should be sufficient in most cases. See attachment for one of my tooltips.

[steg90]

Thanks,

That would be fine, this standard QToolTip?

Regards,
Steve

[wysota]

Yes, stardard tooltip formatted with html as a table.

[steg90]

Ok, so I could just display the tooltip with the QToolTip::showText method? Do I just format the text as html in the QString?

Regards,
Steve

[wysota]

You can just set the appropriate tooltip in your model and Qt will display it. No need to mangle the default tooltip system.Yes, just use the subset of HTML supported by Qt.