private void _UnsetRelation(IRelationSetter relationSetter)
{
if (relationSetter.UnsetRelation())
{
this.UpdateCanvas();
}
}
private void _SetRelation(IRelationSetter relationSetter)
{
if (relationSetter is EmptyRelationSetter)
{
return;
}
RelationDialog relationDialog = new RelationDialog();
relationDialog.ShowDialog();
if (relationSetter.SetRelation(relationDialog.Relation))
{
this.UpdateCanvas();
}
relationDialog.Dispose();
}
public override void MouseClick(object obj, MouseEventArgs e)
{
IRelationSetter relationSetter = _GetRelationSetter(e.Location);
switch (e.Button)
{
case MouseButtons.Left:
try
{
_SetRelation(relationSetter);
}
catch (OperationImpossibleException exception)
{
MessageBox.Show(exception.Message);
}
break;
case MouseButtons.Right:
_UnsetRelation(relationSetter);
break;
}
}