private void returnHandleToCenter() {
if (autoReturnToCenter) {
final int numberOfFrames = 5;
final double intervalsX = (0 - touchX) / numberOfFrames;
final double intervalsY = (0 - touchY) / numberOfFrames;
for (int i = 0; i < numberOfFrames; i++) {
final int j = i;
postDelayed(
new Runnable() {
@Override
public void run() {
touchX += intervalsX;
touchY += intervalsY;
reportOnMoved();
invalidate();
if (moveListener != null && j == numberOfFrames - 1) {
moveListener.OnReturnedToCenter();
}
}
},
i * 40);
}
if (moveListener != null) {
moveListener.OnReleased();
}
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
int actionType = event.getAction();
if (actionType == MotionEvent.ACTION_MOVE) {
int px = getMeasuredWidth() / 2;
int py = getMeasuredHeight() / 2;
int radius = Math.min(px, py) - handleInnerBoundaries;
touchX = (event.getX() - px);
touchX = Math.max(Math.min(touchX, radius), -radius);
touchY = (event.getY() - py);
touchY = Math.max(Math.min(touchY, radius), -radius);
// Coordinates
Log.d(TAG, "X:" + touchX + "|Y:" + touchY);
// Pressure
if (listener != null) {
listener.OnMoved(
(int) (touchX / radius * sensitivity), (int) (touchY / radius * sensitivity));
}
invalidate();
} else if (actionType == MotionEvent.ACTION_UP) {
returnHandleToCenter();
Log.d(TAG, "X:" + touchX + "|Y:" + touchY);
}
return true;
}
private void reportOnMoved() {
if (movementConstraint == CONSTRAIN_CIRCLE) constrainCircle();
else constrainBox();
calcUserCoordinates();
if (moveListener != null) {
boolean rx = Math.abs(touchX - reportX) >= moveResolution;
boolean ry = Math.abs(touchY - reportY) >= moveResolution;
if (rx || ry) {
this.reportX = touchX;
this.reportY = touchY;
// Log.d(TAG, String.format("moveListener.OnMoved(%d,%d)", (int)userX, (int)userY));
moveListener.OnMoved(userX, userY);
}
}
}
private void returnHandleToCenter() {
Handler handler = new Handler();
int numberOfFrames = 5;
final double intervalsX = (0 - touchX) / numberOfFrames;
final double intervalsY = (0 - touchY) / numberOfFrames;
for (int i = 0; i < numberOfFrames; i++) {
handler.postDelayed(
new Runnable() {
@Override
public void run() {
touchX += intervalsX;
touchY += intervalsY;
invalidate();
}
},
i * 40);
}
if (listener != null) {
listener.OnReleased();
}
}
