@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
int iMove = 0;
int tilex = center.x / Tile.SIZE;
int tiley = center.y / Tile.SIZE;
int off_x = (center.x % Tile.SIZE);
int off_y = (center.y % Tile.SIZE);
int w2 = getWidth() / 2;
int h2 = getHeight() / 2;
int posx = w2 - off_x;
int posy = h2 - off_y;
int diff_left = off_x;
int diff_right = Tile.SIZE - off_x;
int diff_top = off_y;
int diff_bottom = Tile.SIZE - off_y;
boolean start_left = diff_left < diff_right;
boolean start_top = diff_top < diff_bottom;
if (start_top) {
if (start_left) iMove = 2;
else iMove = 3;
} else {
if (start_left) iMove = 1;
else iMove = 0;
} // calculate the visibility borders
int x_min = -Tile.SIZE;
int y_min = -Tile.SIZE;
int x_max = getWidth();
int y_max = getHeight();
// paint the tiles in a spiral, starting from center of the map
boolean painted = true;
int x = 0;
while (painted) {
painted = false;
for (int i = 0; i < 4; i++) {
if (i % 2 == 0) x++;
for (int j = 0; j < x; j++) {
if (x_min <= posx && posx <= x_max && y_min <= posy && posy <= y_max) {
// tile is visible
Tile tile = tileController.getTile(tilex, tiley, zoom);
if (tile != null) {
painted = true;
tile.paint(g, posx, posy);
if (tileGridVisible) g.drawRect(posx, posy, Tile.SIZE, Tile.SIZE);
}
}
Point p = move[iMove];
posx += p.x * Tile.SIZE;
posy += p.y * Tile.SIZE;
tilex += p.x;
tiley += p.y;
}
iMove = (iMove + 1) % move.length;
}
}
for (OverlayPainter op : overlayPainterList) {
op.paintOverlay(g);
}
// outer border of the map
int mapSize = Tile.SIZE << zoom;
g.drawRect(w2 - center.x, h2 - center.y, mapSize, mapSize);
// g.drawString("Tiles in cache: " + tileCache.getTileCount(), 50, 20);
if (mapRectanglesVisible && mapRectangleList != null) {
for (MapRectangle rectangle : mapRectangleList) {
Coordinate topLeft = rectangle.getTopLeft();
Coordinate bottomRight = rectangle.getBottomRight();
if (topLeft != null && bottomRight != null) {
Point pTopLeft = getMapPosition(topLeft.getLat(), topLeft.getLon(), false);
Point pBottomRight = getMapPosition(bottomRight.getLat(), bottomRight.getLon(), false);
if (pTopLeft != null && pBottomRight != null) {
rectangle.paint(g, pTopLeft, pBottomRight);
}
}
}
}
if (mapMarkersVisible && mapMarkerList != null) {
for (MapMarker marker : mapMarkerList) {
Point p = getMapPosition(marker.getLat(), marker.getLon());
if (p != null) {
marker.paint(g, p);
}
}
}
}
