Hi Michael,

Thanks for the explanation. It sounds like it might be more trouble than its worth though and I can easily trap for the case where the user didn’t click on the corner points.

But I'm curious and I’m thinking that I don’t quite understand the SnapFunc, specifically how to pass the points into it? This should illustrate my confusion:

function SnapFunc( pointpicker)
{
    // how do the corners get passed in?
    for ( i = 0; i < corners.length; i++)
    {
        pointpicker.setSnapFuncPoint( corners[ i], 'corner ' + i );
    }
}

[...]

    // code that would set up and call the pointpicker...

    // Find the longest line (width) and corners
    var width = 0;
    var corners = new Array;
    for ( var i = 0; i < lines.length; i++)
    {
        var line = lines.item( i);
        var length = round( line.getLength());
        if ( length >= width)
        {
            width = length;
            corners.push( line.getStartPt());
            corners.push( line.getEndPt());
        }
    }

    pointpicker.addSnapFunc( SnapFunc );
                                     ^^^^^^^^^^
                                     Do corners get passed in here?

--Larry