private void SetExtent(SimpleMapPoint pt1, SimpleMapPoint pt2)
{
minx = Math.Min(pt1.x, pt2.x);
miny = Math.Min(pt1.y, pt2.y);
maxx = Math.Max(pt1.x, pt2.x);
maxy = Math.Max(pt1.y, pt2.y);
}
public Point ToScreenP(SimpleMapPoint mp)
{
int sx = ScreenCenter.X - (int)((MapCenter.x - mp.x) / scale);
int sy = ScreenCenter.Y - (int)((mp.y - MapCenter.y) / scale);
return(new Point(sx, sy));
}
public void Update(SimpleMapPoint _center, double _scale, Rectangle currentRect)
{
MapCenter = _center;
scale = _scale;
ScreenRect = currentRect;
ScreenCenter = new Point(currentRect.Width / 2, currentRect.Height / 2);
}
public MapPoint(double _x, double _y)
{
thispoint = new SimpleMapPoint(_x, _y);
ObjectType = SPATIALOBJECTTYPE.POINT;
Centroid = new SimpleMapPoint(_x, _y);
ObjectExtent = new MapExtent(thispoint, thispoint);
}
public void draw(int index, PictureBox pb, SimpleMapPoint location)
{
Graphics g = pb.CreateGraphics();
g.DrawString(values[index].ToString(),
new Font("宋体", 20), new SolidBrush(Color.Green),
new PointF((float)(location.x), (float)(location.y)
));
}
public MapLine(double[] x, double[] y, int startindex, int count)
{
points = new SimpleMapPoint[count];
for (int i = 0; i < count; i++)
{
points[i] = new SimpleMapPoint(x[startindex + i], y[startindex + i]);
}
Init();
}
public MapExtent(SimpleMapPoint pt1, SimpleMapPoint pt2)
{
SetExtent(pt1, pt2);
}
public double scale; //how many map units in each pixel
public MapView(SimpleMapPoint _center, double _scale, Rectangle currentRect)
{
Update(_center, _scale, currentRect);
}