Tooltip on item in tableview

[steg90]

Hi,

Is it possible to display tooltips when hovering over items in the tableview?

Regards,
Steve

[high_flyer]

QTableWidgetItem::setToolTip()

[wysota]

or QAbstractItemModel::setData with Qt::ToolTipRole.

[steg90]

Hi,

setData, would I use this in my custom model? I'm presuming that I can then do a comparison in my data function in my model to see if the role is Qt::ToolTipRole ?


Snippet below :

QVariant DACanTreeModel::data(const QModelIndex &index, int role) const
{
	QVariant data;
	if( role == Qt::ToolTipRole)  // do whatever

QVariant DACanTreeModel::data(const QModelIndex &index, int role) const
{
	QVariant data;
	if( role == Qt::ToolTipRole)  // do whatever

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If so, what do I do?

Regards,
Steve

[marcel]

Yes, like that.
From data you return whatever text you want the tooltip to display.

Regards

[steg90]

Thanks,

Ok, but I don't call setData anywhere in my model, I just update the data structures it uses. Will the role be Qt::ToolTipRole at some point or do I need to use setData for this to happen??

Regards,
Steve

[wysota]

The default delegate will ask the model for tooltip. If you return one, it'll display it.

[steg90]

Hi,

I thought this also, but no tooltip is displayed?

In my data method I just did this so I thought the tooltip would be shown as 'Signal', but nothing appears.

if( role == Qt::ToolTipRole )
	{
		data = "Signal";
	}

if( role == Qt::ToolTipRole )
	{
		data = "Signal";
	}

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Regards,
Steve

[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