public bool DeleteSelectedItem()
{
bool result = false;
if (SelectedItem != null)
{
int maxIndex = elements.IndexOf(SelectedItem);
if (maxIndex == 0)//запрет на удаление нулевого элемента
{
return(false);
}
for (int i = elements.Count() - 1; i >= maxIndex; i--)
{
if (!elements.Remove(elements[i]))
{
return(false);
}
else
{
result = true;
}
}
SelectedItem = null;
}
if (result == true)
{
OnPropertyChanged("DeleteSelectedItem");
}
return(result);
}
private void CanvasMain_MouseRightButtonDown_SelectLink(object sender, MouseButtonEventArgs e)
{
try
{
ManipulatorElement selectedElement = (ManipulatorElement)e.OriginalSource;
if (selectedElement.ElementType != ManipulatorElement.elementTypes.CENTER_OF_MASS)
{
if (selectedElement == manipulator.SelectedItem)
{
manipulator.SelectedItem = null;
}
else
{
manipulator.SelectedItem = selectedElement;
}
}
}
catch (Exception)
{
}
finally
{
//MessageBox.Show(e.OriginalSource.ToString());
}
}
public bool DeleteLastElement()
{
//Нельзя удалить начальный элемент
if (elements.Count > 1)
{
ManipulatorElement lastElement = elements.Last();
if (elements.Remove(lastElement))
{
OnPropertyChanged("DeleteLink");
return(true);
}
}
return(false);
}