Interactive connection line should not snap to grid

[iwbnwif]

However, it probably should snap to connection points?

[iwbnwif]

Not snapping to the grid is relatively easy to solve.

For example in the modeCREATECONNECTION case of the main m_nWorkingMode switch the line:

m_pNewLineShape->SetUnfinishedPoint(FitPositionToGrid(lpos));

can be changed to:

m_pNewLineShape->SetUnfinishedPoint(lpos);

However, this is only a partial solution. The same problem occurs when dragging line end handles and that is much harder to fix because of which the modeShapeMove case works (ignoring any movement less than a grid step).

If grid snapping is disabled globally for handles, then and a shape is resized, then it is almost impossible to put the shape properly back onto the grid afterwards - because all steps will be grid step size which continue to be off grid.

What is really needed is a more advance snapping mechanism which also allows snapping to connection points or shape centres.