static QList<ModelNode> acceptedModelNodeChildren(const ModelNode &parentNode)
{
QList<ModelNode> children;
PropertyNameList properties;
if (parentNode.metaInfo().hasDefaultProperty())
properties.append(parentNode.metaInfo().defaultPropertyName());
#ifndef DISABLE_VISIBLE_PROPERTIES
properties.append(visibleProperties(parentNode));
#endif
foreach (const PropertyName &propertyName, properties) {
AbstractProperty property(parentNode.property(propertyName));
if (property.isNodeAbstractProperty())
children.append(property.toNodeAbstractProperty().directSubNodes());
}
bool NavigatorTreeModel::dropMimeData(const QMimeData *data,
Qt::DropAction action,
int row,
int column,
const QModelIndex &dropIndex)
{
if (action == Qt::IgnoreAction)
return true;
if (action != Qt::LinkAction)
return false;
if (!data->hasFormat("application/vnd.modelnode.list"))
return false;
if (column > 1)
return false;
if (dropIndex.model() != this)
return false;
QModelIndex parentIndex, parentItemIndex;
PropertyName parentPropertyName;
int targetIndex;
parentIndex = dropIndex.sibling(dropIndex.row(), 0);
targetIndex = (row > -1)? row : rowCount(parentIndex);
if (this->data(parentIndex, NavigatorRole).isValid()) {
parentItemIndex = parentIndex;
ModelNode parentNode = nodeForIndex(parentItemIndex);
if (!parentNode.metaInfo().hasDefaultProperty())
return false;
targetIndex -= visibleProperties(parentNode).count();
parentPropertyName = parentNode.metaInfo().defaultPropertyName();
} else {
parentItemIndex = parentIndex.parent();
parentPropertyName = parentIndex.data(Qt::DisplayRole).toByteArray();
}
// Disallow dropping items between properties, which are listed first.
if (targetIndex < 0)
return false;
Q_ASSERT(parentItemIndex.isValid());
QByteArray encodedData = data->data("application/vnd.modelnode.list");
QDataStream stream(&encodedData, QIODevice::ReadOnly);
QList<ModelNode> nodeList;
while (!stream.atEnd()) {
uint nodeHash;
stream >> nodeHash;
if (containsNodeHash(nodeHash)) {
ModelNode node(nodeForHash(nodeHash));
nodeList.append(node);
}
}
ModelNode parentNode(nodeForIndex(parentItemIndex));
NodeAbstractProperty parentProperty = parentNode.nodeAbstractProperty(parentPropertyName);
if (parentProperty.isNodeProperty() &&
nodeList.count() > 1) {
return false;
}
moveNodesInteractive(parentProperty, nodeList, targetIndex);
propagateInvisible(parentNode, isNodeInvisible(parentNode));
return false; // don't let the view do drag&drop on its own
}
