How to select multiple items in treewidget and delete those items? - linux

Question

When I am selecting items in treewidget and then clicked on delete button then is is just deleting top most item only from treewidget
Can you correct this code?
This function is calling in connect statement while clicking on button
void TableDockWidget::deleteGroup() {
QTreeWidgetItem *item = treeWidget->currentItem();
QTreeWidgetItem* nextItem = treeWidget->itemBelow(item);
if ( item == NULL ) return;
PeakGroup* group = getSelectedGroup(); //this function is using to //select items from treewidget
if ( group == NULL ) return;
PeakGroup* parentGroup = group->parent;
if ( parentGroup == NULL ) { //top level item
deleteGroup(group); //this is using to delete group
} else if ( parentGroup && parentGroup->childCount() ) { //this a child item
if ( parentGroup->deleteChild(group) ) {
QTreeWidgetItem* parentItem = item->parent();
if ( parentItem ) {
parentItem->removeChild(item);
delete(item);
}
}
}
//show NextItem
if(nextItem) treeWidget->setCurrentItem(nextItem,0);
return;
}
//here, code of function which is selecting items.
PeakGroup* TableDockWidget::getSelectedGroup() {
QTreeWidgetItem *item = treeWidget->currentItem();
if (!item) return NULL;
QVariant v = item->data(0,Qt::UserRole);
PeakGroup* group = v.value<PeakGroup*>();
if ( group != NULL ) { return group; }
return NULL;
}
// code of function which is deleting group
void TableDockWidget::deleteGroup(PeakGroup *groupX) {
qDebug() << "TableDockWidget::deleteGroup()";
if(!groupX) return;
int pos=-1;
for(int i=0; i < allgroups.size(); i++) {
if ( &allgroups[i] == groupX ) {
pos=i; break;
}
}
if (pos == -1) return;
//qDebug() << "Delete pos=" << pos;
QTreeWidgetItemIterator it(treeWidget);
while (*it) {
QTreeWidgetItem* item = (*it);
if (item->isHidden()) { ++it; continue; }
QVariant v = item->data(0,Qt::UserRole);
PeakGroup* group = v.value<PeakGroup*>();
if ( group != NULL and group == groupX) {
item->setHidden(true);
//Deleteing
allgroups.erase(allgroups.begin()+pos);
int posTree = treeWidget->indexOfTopLevelItem(item);
if (posTree != -1) treeWidget->takeTopLevelItem(posTree);
break;
}
++it;
}
for(unsigned int i = 0; i < allgroups.size(); i++) {
allgroups[i].groupId = i + 1;
}
updateTable();
_mainwindow->getEicWidget()->replotForced();
}

Answer 1

PeakGroup* TableDockWidget::getSelectedGroup() {
PeakGroup* group;
QList<QTreeWidgetItem*>selected = treeWidget->selectedItems();
if(selected.size() == 0) return NULL;
Q_FOREACH (QTreeWidgetItem* item, selected) {
QVariant v = item->data(0,Qt::UserRole);
group = v.value<PeakGroup*>();
item->setHidden(true);
}
if ( group != NULL ) { return group; }
else
return NULL;
}