/**
* Animated equivalent to {@link MapController#scrollBy(int, int)}. Scroll by a given amount using
* the default animation, in pixels.
*
* <p><strong>Limitations</strong>: This method internally uses {@link
* MapController#animateTo(com.google.android.maps.GeoPoint)} which doesn't animate anything if
* the point is really far (in pixels) from the current point. In this case, nothing will be
* animated at all.
*
* @param mapView The {@link MapView} to scroll
* @param dx The horizontal scroll amount in pixels.
* @param dy The vertical scroll amount in pixels.
*/
public static void smoothScrollBy(MapView mapView, int dx, int dy) {
final Projection projection = mapView.getProjection();
final Point tmpPoint = TEMP_POINT;
projection.toPixels(mapView.getMapCenter(), tmpPoint);
tmpPoint.offset(dx, dy);
IGeoPoint geoPoint = projection.fromPixels(tmpPoint.x, tmpPoint.y);
// mapView.getController().animateTo(geoPoint);
mapView.getController().setCenter(geoPoint);
}
@Override
public void draw(final Canvas c, final MapView mapView, final boolean shadow) {
if (shadow) {
return;
}
// If map views is animating, don't update, scale will be wrong.
if (mapView.isAnimating()) {
return;
}
final int zoomLevel = mapView.getZoomLevel();
if (zoomLevel >= minZoom) {
final Projection projection = mapView.getProjection();
if (projection == null) {
return;
}
final IGeoPoint center = projection.fromPixels((screenWidth / 2), screenHeight / 2);
if (zoomLevel != lastZoomLevel
|| (int) (center.getLatitudeE6() / 1E6) != (int) (lastLatitude / 1E6)) {
lastZoomLevel = zoomLevel;
lastLatitude = center.getLatitudeE6();
createScaleBarPicture(mapView);
}
mBounds.set(projection.getScreenRect());
mBounds.offset((int) xOffset, (int) yOffset);
mBounds.set(
mBounds.left,
mBounds.top,
mBounds.left + scaleBarPicture.getWidth(),
mBounds.top + scaleBarPicture.getHeight());
c.drawPicture(scaleBarPicture, mBounds);
}
}
@Override
public boolean onSingleTapUp(final MotionEvent event, final MapView mapView) {
Projection pj = mapView.getProjection();
IGeoPoint p = pj.fromPixels(event.getX(), event.getY());
// Store whether prior popup was displayed so we can call invalidate() &
// remove it if necessary.
boolean onHandleEvent = false;
boolean isRemovePriorPopup = selectedGeoTrack != null;
long idPriorStation = -1;
if (isRemovePriorPopup) {
idPriorStation = selectedGeoTrack.getId();
}
// Next test whether a new popup should be displayed
selectedGeoTrack = getHitMapLocation(mapView, p);
if (isRemovePriorPopup
&& selectedGeoTrack != null
&& idPriorStation == selectedGeoTrack.getId()) {
selectedGeoTrack = null;
hideBubble(mapView);
onHandleEvent = true;
}
if (selectedGeoTrack != null) {
openBubble(mapView, selectedGeoTrack);
onHandleEvent = true;
} else if (isRemovePriorPopup) {
hideBubble(mapView);
}
// if (isRemovePriorPopup || selectedGeoTrack != null) {
// // TODO hideBubble();
// mapView.invalidate();
// onHandleEvent = true;
// }
// ?? balloonView
return onHandleEvent;
}
private void createScaleBarPicture(final MapView mapView) {
// We want the scale bar to be as long as the closest round-number miles/kilometers
// to 1-inch at the latitude at the current center of the screen.
projection = mapView.getProjection();
if (projection == null) {
return;
}
// Two points, 1-inch apart in x/latitude, centered on screen
IGeoPoint p1 = projection.fromPixels((screenWidth / 2) - (xdpi / 2), screenHeight / 2);
IGeoPoint p2 = projection.fromPixels((screenWidth / 2) + (xdpi / 2), screenHeight / 2);
final int xMetersPerInch = ((GeoPoint) p1).distanceTo(p2);
p1 = projection.fromPixels(screenWidth / 2, (screenHeight / 2) - (ydpi / 2));
p2 = projection.fromPixels(screenWidth / 2, (screenHeight / 2) + (ydpi / 2));
final int yMetersPerInch = ((GeoPoint) p1).distanceTo(p2);
final Canvas canvas = scaleBarPicture.beginRecording((int) xdpi, (int) ydpi);
if (latitudeBar) {
final String xMsg = scaleBarLengthText(xMetersPerInch, imperial, nautical);
final Rect xTextRect = new Rect();
textPaint.getTextBounds(xMsg, 0, xMsg.length(), xTextRect);
final int textSpacing = (int) (xTextRect.height() / 5.0);
canvas.drawRect(0, 0, xdpi, lineWidth, barPaint);
canvas.drawRect(
xdpi, 0, xdpi + lineWidth, xTextRect.height() + lineWidth + textSpacing, barPaint);
if (!longitudeBar) {
canvas.drawRect(0, 0, lineWidth, xTextRect.height() + lineWidth + textSpacing, barPaint);
}
canvas.drawText(
xMsg,
xdpi / 2 - xTextRect.width() / 2,
xTextRect.height() + lineWidth + textSpacing,
textPaint);
}
if (longitudeBar) {
final String yMsg = scaleBarLengthText(yMetersPerInch, imperial, nautical);
final Rect yTextRect = new Rect();
textPaint.getTextBounds(yMsg, 0, yMsg.length(), yTextRect);
final int textSpacing = (int) (yTextRect.height() / 5.0);
canvas.drawRect(0, 0, lineWidth, ydpi, barPaint);
canvas.drawRect(
0, ydpi, yTextRect.height() + lineWidth + textSpacing, ydpi + lineWidth, barPaint);
if (!latitudeBar) {
canvas.drawRect(0, 0, yTextRect.height() + lineWidth + textSpacing, lineWidth, barPaint);
}
final float x = yTextRect.height() + lineWidth + textSpacing;
final float y = ydpi / 2 + yTextRect.width() / 2;
canvas.rotate(-90, x, y);
canvas.drawText(yMsg, x, y + textSpacing, textPaint);
}
scaleBarPicture.endRecording();
}