private void Handle_ButtonReleased(object sender, ButtonEventArgs e)
{
if (e.Button == PointerButton.Right)
{
#if WINDOWS
var crow = _treeView.GetRowAtPosition(e.X, e.Y);
if (crow == null)
{
return;
}
if (!_treeView.SelectedRows.ToList().Contains(crow))
{
_treeView.UnselectAll();
_treeView.SelectRow(crow);
_treeView.FocusedRow = crow;
}
#endif
if (_showContextMenu && _contextMenu.Items.Count > 0)
{
_contextMenu.Show(_etoView);
}
}
}
void Load(List <NodeInfo> info, TreePosition it)
{
bool oneSelected = false;
var infoCopy = new List <NodeInfo> (info);
Dictionary <NodeInfo, TreePosition> nodes = new Dictionary <NodeInfo, TreePosition> ();
int num = tree.DataSource.GetChildrenCount(it);
for (int n = 0; n < num; n++)
{
var child = tree.DataSource.GetChild(it, n);
object id = tree.DataSource.GetValue(child, idColumn);
NodeInfo ni = ExtractNodeInfo(info, id);
if (ni != null)
{
nodes [ni] = child;
if (ni.Expanded)
{
tree.ExpandRow(child, false);
}
else
{
tree.CollapseRow(child);
}
if (ni.Selected)
{
oneSelected = true;
tree.SelectRow(child);
}
else
{
tree.UnselectRow(child);
}
if (ni.ChildInfo != null)
{
Load(ni.ChildInfo, child);
}
}
}
// If this tree level had a selected node and this node has been deleted, then
// try to select and adjacent node
if (!oneSelected)
{
// 'info' contains the nodes that have not been inserted
if (info.Any(n => n.Selected))
{
NodeInfo an = FindAdjacentNode(infoCopy, nodes, info[0]);
if (an != null)
{
it = nodes [an];
tree.SelectRow(it);
}
}
}
}
public TreeViews()
{
TreeView view = new TreeView();
TreeStore store = new TreeStore(triState, check, text, desc);
view.GridLinesVisible = GridLines.Both;
var triStateCellView = new CheckBoxCellView(triState) { Editable = true, AllowMixed = true };
triStateCellView.Toggled += (object sender, WidgetEventArgs e) =>
{
if (view.CurrentEventRow == null)
{
MessageDialog.ShowError("CurrentEventRow is null. This is not supposed to happen");
}
else
{
store.GetNavigatorAt(view.CurrentEventRow).SetValue(text, "TriState Toggled");
}
};
var checkCellView = new CheckBoxCellView(check) { Editable = true };
checkCellView.Toggled += (object sender, WidgetEventArgs e) =>
{
if (view.CurrentEventRow == null)
{
MessageDialog.ShowError("CurrentEventRow is null. This is not supposed to happen");
}
else
{
store.GetNavigatorAt(view.CurrentEventRow).SetValue(text, "Toggled");
}
};
view.Columns.Add("TriCheck", triStateCellView);
view.Columns.Add("Check", checkCellView);
view.Columns.Add("Item", text);
view.Columns.Add("Desc", desc);
store.AddNode().SetValue(text, "One").SetValue(desc, "First").SetValue(triState, CheckBoxState.Mixed);
store.AddNode().SetValue(text, "Two").SetValue(desc, "Second").AddChild()
.SetValue(text, "Sub two").SetValue(desc, "Sub second");
store.AddNode().SetValue(text, "Three").SetValue(desc, "Third").AddChild()
.SetValue(text, "Sub three").SetValue(desc, "Sub third");
PackStart(view, true);
Menu contextMenu = new Menu();
contextMenu.Items.Add(new MenuItem("Test menu"));
view.ButtonPressed += delegate(object sender, ButtonEventArgs e)
{
TreePosition tmpTreePos;
RowDropPosition tmpRowDrop;
if ((e.Button == PointerButton.Right) && view.GetDropTargetRow(e.X, e.Y, out tmpRowDrop, out tmpTreePos))
{
// Set actual row to selected
view.SelectRow(tmpTreePos);
contextMenu.Popup(view, e.X, e.Y);
}
};
view.DataSource = store;
Label la = new Label();
PackStart(la);
view.SetDragDropTarget(DragDropAction.All, TransferDataType.Text);
view.SetDragSource(DragDropAction.All, TransferDataType.Text);
view.DragDrop += delegate(object sender, DragEventArgs e)
{
TreePosition node;
RowDropPosition pos;
view.GetDropTargetRow(e.Position.X, e.Position.Y, out pos, out node);
var nav = store.GetNavigatorAt(node);
la.Text += "Dropped \"" + e.Data.Text + "\" into \"" + nav.GetValue(text) + "\" " + pos + "\n";
e.Success = true;
};
view.DragOver += delegate(object sender, DragOverEventArgs e)
{
TreePosition node;
RowDropPosition pos;
view.GetDropTargetRow(e.Position.X, e.Position.Y, out pos, out node);
if (pos == RowDropPosition.Into)
e.AllowedAction = DragDropAction.None;
else
e.AllowedAction = e.Action;
};
view.DragStarted += delegate(object sender, DragStartedEventArgs e)
{
var val = store.GetNavigatorAt(view.SelectedRow).GetValue(text);
e.DragOperation.Data.AddValue(val);
e.DragOperation.Finished += delegate(object s, DragFinishedEventArgs args)
{
Console.WriteLine("D:" + args.DeleteSource);
};
};
view.RowExpanding += delegate(object sender, TreeViewRowEventArgs e)
{
var val = store.GetNavigatorAt(e.Position).GetValue(text);
Console.WriteLine("Expanding: " + val);
};
view.RowExpanded += delegate(object sender, TreeViewRowEventArgs e)
{
var val = store.GetNavigatorAt(e.Position).GetValue(text);
Console.WriteLine("Expanded: " + val);
};
view.RowCollapsing += delegate(object sender, TreeViewRowEventArgs e)
{
var val = store.GetNavigatorAt(e.Position).GetValue(text);
Console.WriteLine("Collapsing: " + val);
};
view.RowCollapsed += delegate(object sender, TreeViewRowEventArgs e)
{
var val = store.GetNavigatorAt(e.Position).GetValue(text);
Console.WriteLine("Collapsed: " + val);
};
int addCounter = 0;
view.KeyPressed += (sender, e) =>
{
if (e.Key == Key.Insert)
{
TreeNavigator n;
if (view.SelectedRow != null)
n = store.InsertNodeAfter(view.SelectedRow).SetValue(text, "Inserted").SetValue(desc, "Desc");
else
n = store.AddNode().SetValue(text, "Inserted").SetValue(desc, "Desc");
view.ExpandToRow(n.CurrentPosition);
view.ScrollToRow(n.CurrentPosition);
view.UnselectAll();
view.SelectRow(n.CurrentPosition);
view.FocusedRow = n.CurrentPosition;
}
};
Button addButton = new Button("Add");
addButton.Clicked += delegate(object sender, EventArgs e)
{
addCounter++;
TreeNavigator n;
if (view.SelectedRow != null)
n = store.AddNode(view.SelectedRow).SetValue(text, "Added " + addCounter).SetValue(desc, "Desc");
else
n = store.AddNode().SetValue(text, "Added " + addCounter).SetValue(desc, "Desc");
view.ExpandToRow(n.CurrentPosition);
view.ScrollToRow(n.CurrentPosition);
view.SelectRow(n.CurrentPosition);
};
PackStart(addButton);
Button removeButton = new Button("Remove Selection");
removeButton.Clicked += delegate(object sender, EventArgs e)
{
foreach (TreePosition row in view.SelectedRows)
{
store.GetNavigatorAt(row).Remove();
}
};
PackStart(removeButton);
var label = new Label();
PackStart(label);
view.RowExpanded += (sender, e) => label.Text = "Row expanded: " + store.GetNavigatorAt(e.Position).GetValue(text);
}