Hi,
I'am working on a way to visualize the zValue hierarchy of PolygonItems
in my scene. To do this I want to use the ListView which supports
interaction with its items like moving. I need the behavior where one
list element(item) can be moved down/up to a new index position and
inserted on that postion while other items are pushed to free the space..
I have experimented with the ListView but apparently Im doing something
wrong because the only behavior I get is CopyAction, istead I need the
MoveAction which wont work.. I have attached a small example where You
can see what I mean.
How do I get the MoveAction to work?
Regards,
Dave
import com.trolltech.qt.core.*;
import com.trolltech.qt.core.Qt.DropAction;
import com.trolltech.qt.core.Qt.DropActions;
import com.trolltech.qt.gui.*;
public class MyMainWindow extends QMainWindow {
public QListView listView;
private QStandardItemModel model;
public MyMainWindow() {
listView = new QListView(this);
setupModel();
setupViews();
setCentralWidget(listView);
}
public static void main(String args[]) {
QApplication.initialize(args);
MyMainWindow myMainWindow = new MyMainWindow();
myMainWindow.show();
QApplication.exec();
}
private void setupModel() {
model = new QStandardItemModel(){
public Qt.DropActions supportedDropActions(){
return new Qt.DropActions(Qt.DropAction.MoveAction);
//Qt.DropAction.CopyAction
}
public boolean dropMimeData(QMimeData data, Qt.DropAction
action, int row, int column, QModelIndex parent){
System.out.println("row "+row+" col "+column);
return super.dropMimeData(data, action, row, column,
parent);
}
public Qt.ItemFlags flags(QModelIndex index)
{
return new Qt.ItemFlags(Qt.ItemFlag.ItemIsDragEnabled,
Qt.ItemFlag.ItemIsDropEnabled, Qt.ItemFlag.ItemIsSelectable,
Qt.ItemFlag.ItemIsEnabled);
}
};
model.setHeaderData(0, Qt.Orientation.Horizontal, tr("Label"));
model.appendRow(new QStandardItem("Holand"));
model.appendRow(new QStandardItem("Turkey"));
model.appendRow(new QStandardItem("Italy"));
model.appendRow(new QStandardItem("Spain"));
model.appendRow(new QStandardItem("Russia"));
}
private void setupViews() {
listView.setModel(model);
QItemSelectionModel selectionModel = new QItemSelectionModel(model);
listView.setSelectionModel(selectionModel);
listView.setDragEnabled(true);
listView.setDropIndicatorShown(true);
listView.setAcceptDrops(true);
listView.setDragDropMode(QAbstractItemView.DragDropMode.InternalMove);
listView.setDragDropMode(QAbstractItemView.DragDropMode.DragDrop);
listView.setSelectionMode(QAbstractItemView.SelectionMode.SingleSelection);
listView.setSelectionBehavior(QAbstractItemView.SelectionBehavior.SelectRows);
listView.setSelectionRectVisible(false);
listView.setMovement(QListView.Movement.Free);
listView.setSpacing(4);
}
}
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