/// <summary>
/// Creates a new hierarchical group.
/// </summary>
/// <param name="mainObj">The group master item; the subordinated items will follow the
/// master one when it is moved around.</param>
/// <returns>A new Group instance.</returns>
public Group CreateGroup(ChartObject mainObj)
{
if (mainObj == null) return null;
Group group = new Group(this);
if (group.setMainObject(mainObj))
{
AddGroupCmd cmd= new AddGroupCmd(mainObj, group);
undoManager.executeCommand(cmd);
return group;
}
else
{
group.onDelete();
group = null;
return null;
}
}
/// <summary>
/// Adds the specified group to the flowchart.
/// </summary>
/// <param name="group">A new Group object that should be added to the flowchart.</param>
public void Add(Group group)
{
group.flowChart = this;
AddGroupCmd cmd = new AddGroupCmd(group.MainObject, group);
undoManager.executeCommand(cmd);
setDirty();
}