QPoint cursorPos = event->pos();
// check if we're really _on_ the item and not indicating a move to just above or below the item
+ // Magic margin number for this is from QAbstractItemViewPrivate::position()
const int margin = 2;
if (cursorPos.y() - indexRect.top() < margin
|| indexRect.bottom() - cursorPos.y() < margin)
return TreeViewTouch::dropEvent(event);
+ // If more than one buffer was being dragged, treat this as a rearrangement instead of a merge request
QList<QPair<NetworkId, BufferId> > bufferList = Client::networkModel()->mimeDataToBufferList(event->mimeData());
if (bufferList.count() != 1)
return TreeViewTouch::dropEvent(event);
+ // Get the Buffer ID of the buffer that was being dragged
BufferId bufferId2 = bufferList[0].second;
- if (index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
+ // Get the Buffer ID of the target buffer
+ BufferId bufferId1 = index.data(NetworkModel::BufferIdRole).value<BufferId>();
+
+ // If the source and target are the same buffer, this was an aborted rearrangement
+ if (bufferId1 == bufferId2)
return TreeViewTouch::dropEvent(event);
- if (index.data(NetworkModel::BufferTypeRole) != BufferInfo::QueryBuffer)
+ // Get index of buffer that was being dragged
+ QModelIndex index2 = Client::networkModel()->bufferIndex(bufferId2);
+
+ // If the buffer being dragged is a channel and we're still joined to it, treat this as a rearrangement
+ // This prevents us from being joined to a channel with no associated UI elements
+ if (index2.data(NetworkModel::BufferTypeRole) == BufferInfo::ChannelBuffer && index2.data(NetworkModel::ItemActiveRole) == true)
return TreeViewTouch::dropEvent(event);
- BufferId bufferId1 = index.data(NetworkModel::BufferIdRole).value<BufferId>();
- if (bufferId1 == bufferId2)
+ //If the source buffer is not mergeable(AKA not a Channel and not a Query), try rearranging instead
+ if (index2.data(NetworkModel::BufferTypeRole) != BufferInfo::ChannelBuffer && index2.data(NetworkModel::BufferTypeRole) != BufferInfo::QueryBuffer)
+ return TreeViewTouch::dropEvent(event);
+
+ // If the target buffer is not mergeable(AKA not a Channel and not a Query), try rearranging instead
+ if (index.data(NetworkModel::BufferTypeRole) != BufferInfo::ChannelBuffer && index.data(NetworkModel::BufferTypeRole) != BufferInfo::QueryBuffer)
return TreeViewTouch::dropEvent(event);
+ // Confirm that the user really wants to merge the buffers before doing so
int res = QMessageBox::question(0, tr("Merge buffers permanently?"),
tr("Do you want to merge the buffer \"%1\" permanently into buffer \"%2\"?\n This cannot be reversed!").arg(Client::networkModel()->bufferName(bufferId2)).arg(Client::networkModel()->bufferName(bufferId1)),
QMessageBox::Yes|QMessageBox::No, QMessageBox::No);