/**
* Set whether to use the network connection if it's available.
*
* @param aMode if true use the network connection if it's available. if false don't use the
* network connection even if it's available.
*/
public void setUseDataConnection(boolean aMode) {
mTileProvider.setUseDataConnection(aMode);
}
@Override
protected void onDraw(Canvas c, OpenStreetMapView osmv) {
if (DEBUGMODE) logger.trace("onDraw");
/*
* Do some calculations and drag attributes to local variables to save
* some performance.
*/
final OpenStreetMapViewProjection pj = osmv.getProjection();
final int zoomLevel = osmv.getZoomLevel(false);
c.getClipBounds(mViewPort);
final int tileSizePx = this.mRendererInfo.maptileSizePx();
final int tileZoom = this.mRendererInfo.maptileZoom();
final int worldSize_2 = 1 << (zoomLevel + tileZoom - 1);
/*
* Calculate the amount of tiles needed for each side around the center
* one.
*/
mViewPort.offset(worldSize_2, worldSize_2);
final int tileNeededToLeftOfCenter = (mViewPort.left >> tileZoom) - 1;
final int tileNeededToRightOfCenter = mViewPort.right >> tileZoom;
final int tileNeededToTopOfCenter = (mViewPort.top >> tileZoom) - 1;
final int tileNeededToBottomOfCenter = mViewPort.bottom >> tileZoom;
final int mapTileUpperBound = 1 << zoomLevel;
// make sure the cache is big enough for all the tiles
final int numNeeded =
(tileNeededToBottomOfCenter - tileNeededToTopOfCenter + 1)
* (tileNeededToRightOfCenter - tileNeededToLeftOfCenter + 1);
mTileProvider.ensureCapacity(numNeeded);
/* Draw all the MapTiles (from the upper left to the lower right). */
for (int y = tileNeededToTopOfCenter; y <= tileNeededToBottomOfCenter; y++) {
for (int x = tileNeededToLeftOfCenter; x <= tileNeededToRightOfCenter; x++) {
/* Construct a URLString, which represents the MapTile. */
final int tileY = MyMath.mod(y, mapTileUpperBound);
final int tileX = MyMath.mod(x, mapTileUpperBound);
final OpenStreetMapTile tile =
new OpenStreetMapTile(this.mRendererInfo, zoomLevel, tileX, tileY);
pj.toPixels(x, y, mTilePos);
final Drawable currentMapTile = mTileProvider.getMapTile(tile);
if (currentMapTile != null) {
currentMapTile.setBounds(
mTilePos.x, mTilePos.y, mTilePos.x + tileSizePx, mTilePos.y + tileSizePx);
currentMapTile.draw(c);
}
if (DEBUGMODE) {
c.drawText(tile.toString(), mTilePos.x + 1, mTilePos.y + mPaint.getTextSize(), mPaint);
c.drawLine(mTilePos.x, mTilePos.y, mTilePos.x + tileSizePx, mTilePos.y, mPaint);
c.drawLine(mTilePos.x, mTilePos.y, mTilePos.x, mTilePos.y + tileSizePx, mPaint);
}
}
}
// draw a cross at center in debug mode
if (DEBUGMODE) {
final GeoPoint center = osmv.getMapCenter();
final Point centerPoint = pj.toMapPixels(center, null);
c.drawLine(centerPoint.x, centerPoint.y - 9, centerPoint.x, centerPoint.y + 9, mPaint);
c.drawLine(centerPoint.x - 9, centerPoint.y, centerPoint.x + 9, centerPoint.y, mPaint);
}
}
/** Whether to use the network connection if it's available. */
public boolean useDataConnection() {
return mTileProvider.useDataConnection();
}