internal override void MouseMove(IPosition p)
{
// The following is pretty much the same as what the controller would do to
// cover auto-select...
// The ground tolerance is 1mm at the draw scale.
ISpatialDisplay draw = ActiveDisplay;
ILength tol = new Length(0.001 * draw.MapScale);
// Just return if we previously selected something, and the
// search point lies within tolerance.
if (m_Line != null)
{
ILength dist = m_Line.Distance(p);
if (dist.Meters < tol.Meters)
{
return;
}
// Ensure the previously select line gets un-highlighted
m_Line = null;
ErasePainting();
}
// Ask the map to find the closest line (if any)
ISpatialIndex index = CadastralMapModel.Current.Index;
m_Line = (index.QueryClosest(p, tol, SpatialType.Line) as LineFeature);
Highlight(m_Line);
}
/// <summary>
/// Sees whether the orientation of the new text should be altered. This
/// occurs if the auto-orient capability is enabled, and the specified
/// position is close to any visible lne.
/// </summary>
/// <param name="posn">The position to use for making the check.</param>
/// <returns></returns>
LineFeature GetOrientation(IPointGeometry posn)
{
// The ground tolerance is 2mm at the draw scale.
ISpatialDisplay display = ActiveDisplay;
double tol = 0.002 * display.MapScale;
// If we previously selected something, see if the search point
// lies within tolerance. If so, there's no change.
if (m_Orient != null)
{
double dist = m_Orient.Distance(posn).Meters;
if (dist < tol)
{
return(m_Orient);
}
}
// Get the map to find the closest line
CadastralMapModel map = CadastralMapModel.Current;
ISpatialIndex index = map.Index;
return(index.QueryClosest(posn, new Length(tol), SpatialType.Line) as LineFeature);
}
