@Override
public void onDraw(Canvas canvas) {
if (mapImage == null || mapImage.isRecycled()) {
return;
}
canvas.drawBitmap(mapImage, displayState.getImageToScreenMatrix(), null);
}
@Override
public void centerOnMapCenterLocation() {
float[] location = displayState.getMapCenterGeoLocation(null);
if (location != null) {
centerOnLocation(location[0], location[1]);
}
}
@Override
public boolean centerOnLocation(float longitude, float latitude) {
boolean result = displayState.centerOnGeoLocation(longitude, latitude);
if (result) {
invalidate();
}
return result;
}
@Override
public void onClick(@Nonnull DisplayState data, @Nonnull Context context) {
final Generic result = data.getResult();
if (result != null) {
Locator.getInstance().getCalculator().convert(result, this.toNumeralBase);
}
}
@Override
protected void onDraw(Canvas canvas) {
if (userLocation == null || !userLocation.hasAccuracy() || displayState == null) {
return;
}
// Figure out distance from user location to screen center point
float[] mapLonLat = displayState.getScreenCenterGeoLocation();
screenCenterLocation.setLatitude(mapLonLat[1]);
screenCenterLocation.setLongitude(mapLonLat[0]);
int distanceM = Math.round(userLocation.distanceTo(screenCenterLocation));
int accuracyM = Math.round(userLocation.getAccuracy());
// Don't draw if centered
if (distanceM == 0) {
return;
}
// Format the distance and accuracy nicely
String distanceStr;
if (PreferenceStore.instance(getContext()).isMetric()) {
distanceStr = getMetricDistanceString(distanceM, accuracyM);
} else {
distanceStr = getEnglishDistanceString(distanceM, accuracyM);
}
// Compute the pixel size of the distanceStr
// -- set font size based on canvas density (dpi)
textPaint.setTextSize(ptsToPixels(textSizePt, canvas));
Rect distanceBox = new Rect();
textPaint.getTextBounds(distanceStr, 0, distanceStr.length(), distanceBox);
distanceBox.offsetTo(0, 0);
int padding = Math.round(ptsToPixels(paddingPt, canvas));
distanceBox.right += 2 * padding;
distanceBox.bottom += 2 * padding;
distanceBox.offset((getWidth() - distanceBox.width()) / 2, getHeight() - distanceBox.height());
float baseline = distanceBox.bottom - padding;
backgroundPaint.setAlpha(192);
backgroundPaint.setStyle(Paint.Style.FILL);
textPaint.setStrokeWidth(1f);
textPaint.setStyle(Paint.Style.FILL_AND_STROKE);
canvas.drawRoundRect(new RectF(distanceBox), padding, padding, backgroundPaint);
canvas.drawText(distanceStr, distanceBox.exactCenterX(), baseline, textPaint);
// Draw center circles
int x = getWidth() / 2;
int y = getHeight() / 2;
backgroundPaint.setAlpha(255);
backgroundPaint.setStyle(Paint.Style.STROKE);
textPaint.setStrokeWidth(2f);
textPaint.setStyle(Paint.Style.STROKE);
canvas.drawCircle(x, y, 5, backgroundPaint);
canvas.drawCircle(x, y, 5, textPaint);
}
@Override
public void setMap(GroundOverlay newMap) throws MapImageTooLargeException {
if (mapData == newMap || (mapData != null && mapData.equals(newMap))) {
return;
}
if (mapImage != null) {
// Release memory used by the old map image
mapImage.recycle();
mapImage = null;
mapData = null;
}
try {
mapImage = loadMapImage(newMap);
} catch (IOException ex) {
mapImage = null;
// Failed to read image, display error message
String mapName = newMap.getName();
final String errorMsg =
"Failed to load map image"
+ (mapName == null || mapName.trim().length() == 0 ? "" : " for " + mapName);
post(
new Runnable() {
@Override
public void run() {
Toast.makeText(getContext(), errorMsg, Toast.LENGTH_LONG).show();
}
});
}
if (mapImage == null) {
spotSet = false;
mapData = null;
return;
}
mapData = newMap;
displayState.setMapData(mapData);
displayState.setScreenView(this);
invalidate();
}
private String localized(String strKey) {
return DisplayState.getCurrent().getLocalizedString(strKey);
}
@Override
public void setZoomLevel(float zoom) {
displayState.setZoomLevel(zoom);
invalidate();
}
@Override
public void zoomMap(float factor) {
displayState.zoom(factor);
invalidate();
}
@Override
public float getZoomLevel() {
return displayState.getZoomLevel();
}
/**
* Returns float[] containing longitude and latitude of the screen center point. If the system
* fails to convert screen to image coordinates or image to geo coordinates, returns 'null' (that
* should never happen).
*
* @return geo coordinates (longitude and latitude, in that order) of the screen center point
*/
@Override
public float[] getScreenCenterGeoLocation() {
return displayState.getScreenCenterGeoLocation();
}
/**
* Translates the map image being displayed by (tx, ty). Returns a boolean indicating if the full
* translation was allowed. Value {@code false} indicates the translation was truncated to avoid
* scrolling the map off screen.
*
* @param tx amount of translation in east-west direction
* @param ty amount of translation in north-south direction
* @return {@code true} if the full translation was allowed, {@code false} if the full translation
* was not allowed to keep map on screen
*/
@Override
public boolean translateMap(float tx, float ty) {
boolean result = displayState.translate(tx, ty);
invalidate();
return result;
}
@Override
public void onSizeChanged(int w, int h, int oldW, int oldH) {
super.onSizeChanged(w, h, oldW, oldH);
// Keep the same point centered in the view
displayState.translate((w - oldW) / 2f, (h - oldH) / 2);
}
