setText in QTreeWidget Crashes?

[vishal.chauhan]

Hi All,

I am working on Qt 4.2.2 on my MAC.
I have set the text of the QTreeWidgetItem by using setText(QString).

I am getting the following crash report.

PID: 163
Thread: 0

Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000026

Thread 0 Crashed:
0 MyApp 0x00153b18 QTreeModel::index(QTreeWidgetItem const*, int) const + 76
1 MyApp 0x00154524 QTreeModel::parent(QModelIndex const&) const + 112
2 MyApp 0x0046d310 QModelIndex::parent() const + 60
3 MyApp 0x00161604 QTreeViewPrivate::viewIndex(QModelIndex const&) const + 84
4 MyApp 0x001641b0 QTreeView::dataChanged(QModelIndex const&, QModelIndex const&) + 124
5 MyApp 0x00166cc4 QTreeView::qt_metacall(QMetaObject::Call, int, void**) + 292
6 MyApp 0x0015a59c QTreeWidget::qt_metacall(QMetaObject::Call, int, void**) + 40
7 StellarPhoenix 0x0006a3d8 QMetaObject::activate(QObject*, int, int, void**) + 1240
8 MyApp 0x0029eeac QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&) + 64
9 MyApp 0x00154808 QTreeModel::emitDataChanged(QTreeWidgetItem*, int) + 396
10 MyApp 0x00157b4c QTreeWidgetItem::setData(int, int, QVariant const&) + 1096
11 MyApp 0x00443d80 QTreeWidgetItem::setText(int, QString const&) + 72

If any body knows why it is crashing then plz help me.

Thanks.

[wysota]

Can we see the code?

[jpn]

The pointer is invalid? Could you show some code, please?

[vishal.chauhan]

Here it is

void MyClass::SetFolderTree(QTreeWidgetItem *treeViewItem,const QString& bFileName, const QString& ID,const QString& parentId)
{
    QIcon Folder(":/images/img_Folder.png");
	//QSize size(18,18);//Set the size of the Item in treeWidget
	QSize folderSize(16,16); 
	QFont lucidaFont("Lucida Grande", 12);
 
    if(!TotalFilesAndFoldersInList.isEmpty())
        m_pTotalSizeReadLabel->setText(TotalFilesAndFoldersInList);
 
    if(!bFileName.isEmpty())	
	    treeViewItem->setText(0,bFileName);
	else 
	    treeViewItem->setText(0,ID);
 
	if(!ID.isEmpty())				
	    treeViewItem->setText(1,ID);
 
	if(!parentId.isEmpty())		
	    treeViewItem->setText(2,parentId);
 
 
	treeViewItem->setFont(0,lucidaFont);
 
	treeViewItem->setCheckState (0, Qt::Unchecked );
	treeViewItem->setIcon (0, Folder );
 
	m_pDiskTree->m_pDiscTreeWidget->setIconSize(folderSize);
	//treeViewItem->setSizeHint (0,size );
	treeViewItem->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsUserCheckable );	
 
}

void MyClass::SetFolderTree(QTreeWidgetItem *treeViewItem,const QString& bFileName, const QString& ID,const QString& parentId)
{
    QIcon Folder(":/images/img_Folder.png");
	//QSize size(18,18);//Set the size of the Item in treeWidget
	QSize folderSize(16,16); 
	QFont lucidaFont("Lucida Grande", 12);
	
    if(!TotalFilesAndFoldersInList.isEmpty())
        m_pTotalSizeReadLabel->setText(TotalFilesAndFoldersInList);
		
    if(!bFileName.isEmpty())	
	    treeViewItem->setText(0,bFileName);
	else 
	    treeViewItem->setText(0,ID);
			
	if(!ID.isEmpty())				
	    treeViewItem->setText(1,ID);
			
	if(!parentId.isEmpty())		
	    treeViewItem->setText(2,parentId);
	
	
	treeViewItem->setFont(0,lucidaFont);
	
	treeViewItem->setCheckState (0, Qt::Unchecked );
	treeViewItem->setIcon (0, Folder );
 
	m_pDiskTree->m_pDiscTreeWidget->setIconSize(folderSize);
	//treeViewItem->setSizeHint (0,size );
	treeViewItem->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsUserCheckable );	
        
}

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[jpn]

And where does this "QTreeWidgetItem *treeViewItem" come from?

[vishal.chauhan]

I am declaring it in the calling function and since I need its value in this function so I emit the signal SetFolderTreeName for which the code I have sent you eariler is Slot.

QTreeWidgetItem  *treeViewItem = new QTreeWidgetItem;
treeViewItem->setSizeHint (0,size );
 
emit SetFolderTreeName(treeViewItem,bFileName,qFileId.setNum(MyEntry->dwFileId),QString::number(MyEntry->dwParentId));

QTreeWidgetItem  *treeViewItem = new QTreeWidgetItem;
treeViewItem->setSizeHint (0,size );

emit SetFolderTreeName(treeViewItem,bFileName,qFileId.setNum(MyEntry->dwFileId),QString::number(MyEntry->dwParentId));

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