public bool Enabled(object arg)
{
return(ValidContexts.HasX(ui.Selection.Context) && _enabled(ui.Selection, ui.Handler.Model, arg));
}
private void InternalExecute(object arg, IEnumerable <ITabularNamedObject> alternateSelection = null)
{
TabularModelHandler handler;
if (ui != null)
{
ui.Actions.SelectObjects.Clear();
ui.Actions.LastActionExecuted = this;
handler = ui.Handler;
}
else
{
handler = TabularModelHandler.Singleton;
}
EditObjectName = null;
ExpandObject = null;
var selection = alternateSelection == null ? (ui == null ? UITreeSelection.Empty : ui.Selection) : new UITreeSelection(alternateSelection);
// Check if the context is valid before executing the action:
if (!ValidContexts.HasX(selection.Context | Context.Model | Context.Tool))
{
return;
}
try
{
handler.BeginUpdate(Name);
_execute(selection, handler.Model);
}
catch (Exception e)
{
MessageBox.Show("The action failed with the following error: " + e.Message, "Unable to perform action", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
finally
{
handler.EndUpdate();
}
if (ui == null)
{
return;
}
// Actions can trigger certain UI actions after execution (for example, tree expansion, name editing, tree selection):
if (ExpandObject != null)
{
ui.ExpandItem(ExpandObject);
}
if (EditObjectName != null)
{
ui.EditName(EditObjectName);
}
if (ui.Actions.SelectObjects.Count > 0)
{
var tree = ui.Elements.TreeView;
tree.ClearSelection();
TreeNodeAdv firstNode = null;
foreach (var obj in ui.Actions.SelectObjects)
{
var node = tree.FindNodeByTag(obj);
if (firstNode == null)
{
firstNode = node;
}
if (node != null)
{
node.IsSelected = true;
}
}
if (firstNode != null)
{
tree.EnsureVisible(firstNode);
}
}
}