public void ReloadData()
{
// save selected items
var items = SelectedItems.ToArray();
// save scroll state
var hscrollbar = Control.HScrollbar as Gtk.HScrollbar;
var vscrollbar = Control.VScrollbar as Gtk.VScrollbar;
var hscroll = hscrollbar?.Value;
var vscroll = vscrollbar?.Value;
// reload data and expand items
suppressExpandCollapseEvents++;
UpdateModel();
collection.ExpandItems();
suppressExpandCollapseEvents--;
// restore selection
SkipSelectedChange = true;
bool selectionChanged = false;
Tree.Selection.UnselectAll();
foreach (var item in items.OfType <ITreeGridItem>())
{
var iter = model.GetIterFromItem(item, true);
if (iter != null)
{
Tree.Selection.SelectIter(iter.Value);
}
else
{
selectionChanged = true;
}
}
if (selectionChanged)
{
Callback.OnSelectionChanged(Widget, EventArgs.Empty);
}
SkipSelectedChange = false;
if (hscroll != null)
{
vscrollbar.Value = hscroll.Value;
}
if (vscroll != null)
{
vscrollbar.Value = vscroll.Value;
}
}
public void RefreshData()
{
UpdateModel();
collection.ExpandItems();
}
public override void AttachEvent(string handler)
{
switch (handler)
{
case TreeView.ExpandingEvent:
tree.TestExpandRow += delegate(object o, Gtk.TestExpandRowArgs args)
{
if (cancelExpandCollapseEvents)
{
return;
}
var e = new TreeViewItemCancelEventArgs(GetItem(args.Path) as ITreeItem);
Widget.OnExpanding(e);
args.RetVal = e.Cancel;
};
break;
case TreeView.ExpandedEvent:
tree.RowExpanded += delegate(object o, Gtk.RowExpandedArgs args)
{
if (cancelExpandCollapseEvents)
{
return;
}
var item = GetItem(args.Path) as ITreeItem;
if (item != null && !item.Expanded)
{
item.Expanded = true;
collection.ExpandItems(item, args.Path);
Widget.OnExpanded(new TreeViewItemEventArgs(item));
}
};
break;
case TreeView.CollapsingEvent:
tree.TestCollapseRow += delegate(object o, Gtk.TestCollapseRowArgs args)
{
if (cancelExpandCollapseEvents)
{
return;
}
var e = new TreeViewItemCancelEventArgs(GetItem(args.Path) as ITreeItem);
Widget.OnCollapsing(e);
args.RetVal = e.Cancel;
};
break;
case TreeView.CollapsedEvent:
tree.RowCollapsed += delegate(object o, Gtk.RowCollapsedArgs args)
{
if (cancelExpandCollapseEvents)
{
return;
}
var item = GetItem(args.Path) as ITreeItem;
if (item != null && item.Expanded)
{
item.Expanded = false;
Widget.OnCollapsed(new TreeViewItemEventArgs(item));
}
};
break;
case TreeView.ActivatedEvent:
tree.RowActivated += delegate(object o, Gtk.RowActivatedArgs args)
{
this.Widget.OnActivated(new TreeViewItemEventArgs(model.GetItemAtPath(args.Path)));
};
break;
case TreeView.SelectionChangedEvent:
tree.Selection.Changed += delegate
{
this.Widget.OnSelectionChanged(EventArgs.Empty);
};
break;
case TreeView.BeforeLabelEditEvent:
textCell.EditingStarted += (o, args) => {
var item = model.GetItemAtPath(args.Path);
if (item != null)
{
var itemArgs = new TreeViewItemCancelEventArgs(item);
Widget.OnBeforeLabelEdit(itemArgs);
args.RetVal = itemArgs.Cancel ? true : false;
}
};
break;
case TreeView.AfterLabelEditEvent:
textCell.Edited += (o, args) => {
var item = model.GetItemAtPath(args.Path);
if (item != null)
{
Widget.OnAfterLabelEdit(new TreeViewItemEditEventArgs(item, args.NewText));
item.Text = args.NewText;
}
};
break;
default:
base.AttachEvent(handler);
break;
}
}
