// big place: 0 - small, 5 - must have
public virtual void placeLabel(int bigPlace, int fontSize, bool isAdjusting)
{
//LibSys.StatusBar.Trace("LiveObject::placeLabel(" + bigPlace + "," + fontSize + ")");
m_font = Project.getLabelFont(fontSize);
Graphics g = m_map.getGraphics();
if (g == null)
{
LibSys.StatusBar.Trace("Graphics null in LiveObject::placeLabel()");
return;
}
// other threads can throw "invalid argument" exception in g.MeasureString:
recalcLabelMetrics(Name, g);
// Now try to place the label so that it does not intersect with
// any other label (or at least minimize intersections)
int jmin = 100000;
int imin = 0;
m_labelPosition = 0;
Rectangle frame = m_map.getFrameRectangle(m_itile);
for (int i = 0; i < N_LABEL_POSITIONS; i++, nextLabelPosition())
{
labelBoundingRect();
Rectangle lbr = intersectionSensitiveRect();
// first check if label in this position will be clipped by frame:
Rectangle tmp = new Rectangle(frame.X, frame.Y, frame.Width, frame.Height);
tmp.Intersect(lbr);
if (!lbr.Equals(tmp))
{
//LibSys.StatusBar.Trace("pos=" + m_labelPosition + " clipped by frame");
continue;
}
// now count intersections with other labels:
int j = m_map.countIntersections(m_olm, this, lbr);
if (j == 0)
{ // no intersections; we better pick this choice.
imin = i;
jmin = 0;
break;
}
if (j < jmin)
{ // minimal intersections is our goal
jmin = j;
imin = i;
}
}
m_labelPosition = imin;
m_intersections = jmin;
if (jmin > MAX_INTERSECTIONS)
{ // bad luck - there are too many
// places already there
if (bigPlace < 4 && !isAdjusting && jmin > ((bigPlace + 1) * MAX_BIGCITY_INTERSECTIONS_FACTOR))
{
m_doName = false;
boundingRect();
//LibSys.StatusBar.Trace("Name omited, intersections=" + jmin + " Place=" + Name);
}
}
}