/** Center to the location */
public void center() {
/*
* On double tap, move to center
*/
mPan = new Pan();
if (mService != null) {
mPan.setMove(0, (float) ((getHeight() * .25) / mScale.getScaleFactor()));
mService.setPan(mPan);
mService.getTiles().forceReload();
}
loadTiles();
updateCoordinates();
postInvalidate();
}
/** Function that loads new tiles in background */
private void loadTiles() {
if (mService == null) {
return;
}
if (mImageDataSource == null) {
return;
}
TileMap map = mService.getTiles();
map.loadTiles(
mGpsParams.getLongitude(),
mGpsParams.getLatitude(),
mPan,
mMacro,
mScale,
mGpsParams.getBearing(),
new GenericCallback() {
@Override
public Object callback(Object map, Object tu) {
TileMap.TileUpdate t = (TileMap.TileUpdate) tu;
((TileMap) map).flip();
/*
* Set move with pan after new tiles are finally loaded
*/
mPan.setMove(
(float) (mPan.getMoveX() * t.factor), (float) (mPan.getMoveY() * t.factor));
int index = Integer.parseInt(mPref.getChartType());
String type = Boundaries.getChartType(index);
mGpsTile = t.gpsTile;
mOnChart = type + "\n" + t.chart;
/*
* And pan
*/
mPan.setTileMove(t.movex, t.movey);
mMovement = new Movement(t.offsets);
mService.setMovement(mMovement);
mMacro = mScale.getMacroFactor();
mScale.updateMacro();
updateCoordinates();
invalidate();
return null;
}
});
}
/**
* @param canvas
* @param ctx
*/
private void drawTiles(Canvas canvas, DrawingContext ctx) {
Tile.draw(ctx, mOnChart, mService.getTiles());
}