Method HitTest

ogl/basic.cpp:528–578

}

bool wxShape::HitTest(double x, double y, int *attachment, double *distance)
{
//  if (!sensitive)
//    return false;

  double width = 0.0, height = 0.0;
  GetBoundingBoxMin(&width, &height);
  if (fabs(width) < 4.0) width = 4.0;
  if (fabs(height) < 4.0) height = 4.0;

  width += (double)4.0; height += (double)4.0; // Allowance for inaccurate mousing

  double left = (double)(m_xpos - (width/2.0));
  double top = (double)(m_ypos - (height/2.0));
  double right = (double)(m_xpos + (width/2.0));
  double bottom = (double)(m_ypos + (height/2.0));

  int nearest_attachment = 0;

  // If within the bounding box, check the attachment points
  // within the object.

  if (x >= left && x <= right && y >= top && y <= bottom)
  {
    int n = GetNumberOfAttachments();
    double nearest = 999999.0;

    // GetAttachmentPosition[Edge] takes a logical attachment position,
    // i.e. if it's rotated through 90%, position 0 is East-facing.

    for (int i = 0; i < n; i++)
    {
      double xp, yp;
      if (GetAttachmentPositionEdge(i, &xp, &yp))
      {
        double l = (double)sqrt(((xp - x) * (xp - x)) +
                   ((yp - y) * (yp - y)));

        if (l < nearest)
        {
          nearest = l;
          nearest_attachment = i;
        }
      }
    }
    *attachment = nearest_attachment;
    *distance = nearest;
    return true;
  }
  else return false;
}

// Format a text string according to the region size, adding
// strings with positions to region text list