private void _DeleteShapes(IEnumerable <Shape> shapes)
{
foreach (var shape in shapes)
{
DataFlowConnectionLine line = shape as DataFlowConnectionLine;
if (line != null)
{
VixenSystem.DataFlow.ResetComponentSource(line.DestinationDataComponent);
_RemoveShape(line);
}
// we COULD use FilterSetupShapeBase, as all the operations below are generic.... but, we only want
// to be able to delete filter shapes. We want to enforce all elements and outputs to be kept.
FilterShape filterShape = shape as FilterShape;
if (filterShape != null)
{
ControlPointId pointId;
// go through all outputs for the filter, and check for connections to other shapes.
// For any that we find, remove them (ie. set the other shape source to null).
for (int i = 0; i < filterShape.OutputCount; i++)
{
pointId = filterShape.GetControlPointIdForOutput(i);
_RemoveDataFlowLinksFromShapePoint(filterShape, pointId);
}
// now check the source of the filter; if it's connected to anything, remove the connecting shape.
// (don't really need to reset the source for the filter, since we're removing it, but may as well
// anyway, just in case there's something else that's paying attention...)
pointId = filterShape.GetControlPointIdForInput(0);
_RemoveDataFlowLinksFromShapePoint(filterShape, pointId);
VixenSystem.Filters.RemoveFilter(filterShape.FilterInstance);
_RemoveShape(filterShape);
}
}
//looks like we may have delted shapes so assume we made changes
_changesMade = true;
}
