We wanted to add some padding to the Extents to the Collection of Graphics
We send the Collection and % to pad.
Was interested in knowing if this is the correct way of doing it. Does this always work in any coordinate system.
public static Envelope GetExtentsForGraphicCollection(GraphicCollection gc, double percentToPadEnvelope)
{
double? minX = null;
double? minY = null;
double? maxX = null;
double? maxY = null;
foreach (Graphic g in gc)
{
double tempMinX = Convert.ToDouble(g.Attributes["MIN_X"]);
double tempMinY = Convert.ToDouble(g.Attributes["MIN_Y"]);
double tempMaxX = Convert.ToDouble(g.Attributes["MAX_X"]);
double tempMaxY = Convert.ToDouble(g.Attributes["MAX_Y"]);
if (minX == null || tempMinX < minX)
minX = tempMinX;
if (minY == null || tempMinY < minY)
minY = tempMinY;
if (maxX == null || tempMaxX > maxX)
maxX = tempMaxX;
if (maxY == null || tempMaxY > maxY)
maxY = tempMaxY;
}
double xPadding = (double)(maxX - minX) * percentToPadEnvelope;
double yPadding = (double)(maxY - minY) * percentToPadEnvelope;
minX = minX - xPadding;
maxX = maxX + xPadding;
minY = minY - yPadding;
maxY = maxY + yPadding;
return new Envelope((double)minX, (double)minY, (double)maxX, (double)maxY);
}
