public override void Initialize(DrawArgs drawArgs)
{
try {
m_Sprite = new Sprite(drawArgs.Device);
if (m_IconFilePath != null
&& File.Exists(m_IconFilePath)) {
m_IconTexture = ImageHelper.LoadIconTexture(m_IconFilePath);
m_IconTextureDescription = m_IconTexture.GetLevelDescription(0);
}
loadShapeFile(m_ShapeFilePath);
if ((m_ShapeTileArgs.ShowLabels && m_ShapeTileArgs.DataKey != null)
|| m_IconTexture != null) {
foreach (ShapeFileRecord record in m_ShapeTileArgs.ShapeRecords) {
if (record.Value != null) {
if (record.Point != null) {
Shapefile_Point p = new Shapefile_Point();
p.X = record.Point.X;
p.Y = record.Point.Y;
p.Tag = record.Value;
m_LabelList.Add(p);
}
else if (record.MultiPoint != null) {
Shapefile_Point p = new Shapefile_Point();
p.X = 0.5*(record.MultiPoint.BoundingBox.West + record.MultiPoint.BoundingBox.East);
p.Y = 0.5*(record.MultiPoint.BoundingBox.North + record.MultiPoint.BoundingBox.South);
p.Tag = record.Value;
m_LabelList.Add(p);
}
else if (record.PolyLine != null) {
Shapefile_Point p = new Shapefile_Point();
p.X = 0.5*(record.PolyLine.BoundingBox.West + record.PolyLine.BoundingBox.East);
p.Y = 0.5*(record.PolyLine.BoundingBox.North + record.PolyLine.BoundingBox.South);
p.Tag = record.Value;
m_LabelList.Add(p);
}
else if (record.Polygon != null) {
Shapefile_Point p = new Shapefile_Point();
p.X = 0.5*(record.Polygon.BoundingBox.West + record.Polygon.BoundingBox.East);
p.Y = 0.5*(record.Polygon.BoundingBox.North + record.Polygon.BoundingBox.South);
p.Tag = record.Value;
m_LabelList.Add(p);
}
}
}
}
}
catch (Exception ex) {
Log.Write(ex);
}
finally {
Inited = true;
}
}
private Point[] getScreenPoints(Shapefile_Point[] sourcePoints, int offset, int length, GeographicBoundingBox dstBB, Size dstImageSize)
{
double degreesPerPixelX = (dstBB.East - dstBB.West)/(double) dstImageSize.Width;
double degreesPerPixelY = (dstBB.North - dstBB.South)/(double) dstImageSize.Height;
ArrayList screenPointList = new ArrayList();
for (int i = offset; i < offset + length; i++) {
double screenX = (sourcePoints[i].X - dstBB.West)/degreesPerPixelX;
double screenY = (dstBB.North - sourcePoints[i].Y)/degreesPerPixelY;
if (screenPointList.Count > 0) {
Point v = (Point) screenPointList[screenPointList.Count - 1];
if (v.X == (int) screenX
&& v.Y == (int) screenY) {
continue;
}
}
screenPointList.Add(new Point((int) screenX, (int) screenY));
}
if (screenPointList.Count <= 1) {
return new Point[] {new Point(0, 0), new Point(0, 0)};
}
return (Point[]) screenPointList.ToArray(typeof (Point));
}