Drag and Drop problem

[ScoOteR]

Dear fellows,

i've looked over the forum first and didn' find any possible matching case. I'm trying to do drag and drop over a table view header. i've sub classed the tableview and the headers to implement their dragenterevent and dropevent. Also my model implements minmetype(). but draging is disabled over the header. i donno y, and i've debugged alot. any body got any idea !!!!!

[wysota]

Did you set acceptDrops property of the headerview to true? Did you implement mimeData() for your model (provided you want to drag items from the model)?

[ScoOteR]

yes all this stuff done, although my intention is to drop color item from another widget to the header of the tableview to color the columns.

[wysota]

Does the headerview receive dragenter and drop events? You can check that by installing an event filter on the header view.

[ScoOteR]

I've debugged it the header receives the dragenters event but it doesn't enter the drop event as the dropping is disabled as I've mentioned before. and yes i accept the drop action in the drag enters event.

[ScoOteR]

I've tried something else. I've made a simple model which holds some static data and made another widget for it the drop was enabled over this one. Even though both have the same custom table view and custom header and both models implements mimeType. So, what do u think made it work with one model and not the other !!!!!!!!!!!!!!!!!!!!!1

[ScoOteR]

actually I've a new surprise for u all. On debugging I found that it stops @ the break point in the mimeType of my temp small model. and i doesn't in the other model I've been working with for a while. So, I'd really appreciate if any body told me what the heck on earth could make what's happening here make sense !!!!

[wysota]

How did you enable drops for the header? Can you show the actual function call? Or maybe even a minimal compilable example?

[ScoOteR]

i think u didn't see my last post but any way here's the snippets u asked for

CHeader::CHeader(QWidget *parent)
    : QHeaderView(Qt::Horizontal,parent)
{
	ui.setupUi(this);
	setAcceptDrops(true);
	setDropIndicatorShown(true);
	m_table = (CMyTable*)parent;
}

CHeader::CHeader(QWidget *parent)
    : QHeaderView(Qt::Horizontal,parent)
{
	ui.setupUi(this);
	setAcceptDrops(true);
	setDropIndicatorShown(true);
	m_table = (CMyTable*)parent;
}

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and here i associate this header to my custom table view

CCustomColumnTableView::CCustomColumnTableView(QWidget *parent)
: QTableView(parent)
{
	CHeader *  temp = new CHeader(this);
	setHorizontalHeader(temp);
        .
        .
}

CCustomColumnTableView::CCustomColumnTableView(QWidget *parent)
: QTableView(parent)
{
	CHeader *  temp = new CHeader(this);
	setHorizontalHeader(temp);
        .
        .
}

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[wysota]

What about dragEnter and drop events?

[ScoOteR]

void CHeader::dragEnterEvent(QDragEnterEvent * event)
{
	if (event->mimeData()->hasFormat("application/x-color"))
		event->acceptProposedAction();
}
 
void CHeader::dropEvent(QDropEvent * event)
{
	m_table->dropEvent(event);
}

void CHeader::dragEnterEvent(QDragEnterEvent * event)
{
	if (event->mimeData()->hasFormat("application/x-color"))
		event->acceptProposedAction();
}

void CHeader::dropEvent(QDropEvent * event)
{
	m_table->dropEvent(event);
}

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