QTreeWidget Crashing while setText,setFont,setIcon

[santosh.kumar]

Hi
My application is creating Tree of thousand or lack of folder ad files..
I m using setText,setFont,setIcon for QTreeWidget for every folder..
But in the mid of application it crashes while creating tree...

I m using code like this:



void* StellarPhoenixMAC::InsertFoldersInTree(void* myEntry,QString bFileName)
{
MyEntry = (DOSDIR*)myEntry;


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);

unsigned int nListCnt = 0;
QTreeWidgetItem *treeViewItem = NULL;

iProgressCounter++;


//Check if root already there or not
//if(!bDriveTree && bProcessStarted)

if(!m_dwDirLength)
{
m_dwDirLength++;
DOSDIR *firstDirLink=NULL;
firstDirLink = (DOSDIR*)calloc(1,sizeof(DOSDIR)); //For CreateDirTreeRootItem added here

if(firstDirLink)
{
firstDirLink->dwFileId = ROOTREFRENCE;
firstDirLink->bAttribute=0x10;
firstDirLink->bCheckStatus=UNCHECK;
//Root's ParentID is set to -1 so as to keep it unique
firstDirLink->dwParentId=0;
}

list.append(new TREEITEM((void*)firstDirLink,QString::fromAscii((c onst char *)m_pDriveForSavingFiles->VolumeLable,-1)));
emit MacFileSysRootTree(QString::fromAscii((const char *)m_pDriveForSavingFiles->VolumeLable,-1),qFileId.setNum(ROOTREFRENCE),QString::number(0) );

m_MacFileSys->MacFileSysThreadSleep();

if(list.count() > 0)
{
treeitem=list.first();
treeitem->ListViewItem=MacFileSysRootItem;
}

free(firstDirLink);
}///end of if(!m_dwDirLength)
m_dwDirLength++;
m_dwTotalDirs++;

if(!bFileName.isEmpty())
list.append(new TREEITEM((void*)MyEntry,bFileName)); //Item added to list
else
list.append(new TREEITEM((void*)MyEntry,QString::number(MyEntry->dwFileId))); //Item added to list

nListCnt = list.count();
//if(list.count() > 0)
// treeitem=list.last();
if(nListCnt)
treeitem = list.at(nListCnt-1);

treeViewItem = new QTreeWidgetItem;

//if(!TotalFilesAndFoldersInList.isEmpty())
// m_pTotalSizeReadLabel->setText(TotalFilesAndFoldersInList);

QString ID = QString::number(MyEntry->dwFileId);
QString parentId = QString::number(MyEntry->dwParentId);

if(!bFileName.isEmpty())
treeViewItem->setText(0,bFileName);
else
{
if(!ID.isEmpty())
treeViewItem->setText(0,ID);
else
treeViewItem->setText(0,"NONAME");
}

if(!ID.isEmpty())
treeViewItem->setText(1,ID);

if(!parentId.isEmpty())
treeViewItem->setText(2,parentId);
//emit SetFolderTree((void*)treeViewItem,bFileName,QStrin g::number(MyEntry->dwFileId),QString::number(MyEntry->dwParentId));

if(MacFileSysRootItem !=NULL && treeViewItem != NULL)
MacFileSysRootItem->insertChild(0,treeViewItem);

treeViewItem->setCheckState (0, Qt::Unchecked );
treeViewItem->setIcon (0, Folder );


if(treeitem != NULL && treeViewItem != NULL)
treeitem->ListViewItem= treeViewItem;

return( (void*)treeViewItem);
}

void StellarPhoenixMAC::SetFolderTree (void* treeViewItem,QString bFileName, QString ID,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())
((QTreeWidgetItem*)treeViewItem)->setData(0,Qt::DisplayRole,bFileName);
else
{
if(!ID.isEmpty())
((QTreeWidgetItem*)treeViewItem)->setData(0,Qt::DisplayRole,ID);
else
((QTreeWidgetItem*)treeViewItem)->setData(0,Qt::DisplayRole,"NONAME");
}

if(!ID.isEmpty())
((QTreeWidgetItem*)treeViewItem)->setData(1,Qt::DisplayRole,ID);

if(!parentId.isEmpty())
((QTreeWidgetItem*)treeViewItem)->setData(2,Qt::DisplayRole,parentId);

//((QTreeWidgetItem*)treeViewItem)->setFont(0,lucidaFont);

//((QTreeWidgetItem*)treeViewItem)->setCheckState (0, Qt::Unchecked );
//((QTreeWidgetItem*)treeViewItem)->setIcon (0, Folder );
//((QTreeWidgetItem*)treeViewItem)->setSizeHint (0,size );


((QTreeWidgetItem*)treeViewItem)->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsUserCheckable );
}



if anybody know why it is crashing plz help me...

[jpn]

Start with removing void pointers and C-style casts. This will let compiler do sanity checks.

[santosh.kumar]

But without (void*)treeItem which typecasting i will use....Is there any other alternative..

According to my application requirment function return QtreeWidgetItem to other class...
How i will use qt casting here...kindly tell me

[jpn]

This forum is not about C++ programming basics. Please refer your favourite C++ book about type casting.