/** Handles thumb selection and movement. Notifies listener callback on certain events. */
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
pressedThumb = evalPressedThumb(event.getX());
invalidate();
break;
case MotionEvent.ACTION_MOVE:
if (pressedThumb != null) {
if (Thumb.MIN.equals(pressedThumb)) {
setNormalizedMinValue(screenToNormalized(event.getX()));
} else if (Thumb.MAX.equals(pressedThumb)) {
setNormalizedMaxValue(screenToNormalized(event.getX()));
}
if (notifyWhileDragging && listener != null) {
listener.rangeSeekBarValuesChanged(getSelectedMinValue(), getSelectedMaxValue());
}
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
pressedThumb = null;
invalidate();
if (listener != null) {
listener.rangeSeekBarValuesChanged(getSelectedMinValue(), getSelectedMaxValue());
}
break;
}
return true;
}
/** Handles thumb selection and movement. Notifies listener callback on certain events. */
@Override
public boolean onTouchEvent(@NonNull MotionEvent event) {
if (!isEnabled()) {
return false;
}
int pointerIndex;
final int action = event.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
// Remember where the motion event started
mActivePointerId = event.getPointerId(event.getPointerCount() - 1);
pointerIndex = event.findPointerIndex(mActivePointerId);
mDownMotionX = event.getX(pointerIndex);
final float downMotionY = event.getY(pointerIndex);
pressedThumb = evalPressedThumb(mDownMotionX, downMotionY);
// Only handle thumb presses.
if (pressedThumb == null) {
return super.onTouchEvent(event);
}
setPressed(true);
invalidate();
onStartTrackingTouch();
trackTouchEvent(event);
attemptClaimDrag();
updateTouchPosition(pressedThumb.equals(Thumb.MIN));
listener.onTouchStart(
touchPositionX,
touchPositionY,
getSelectedMinValue(),
getSelectedMaxValue(),
pressedThumb.equals(Thumb.MIN));
break;
case MotionEvent.ACTION_MOVE:
if (pressedThumb != null) {
if (mIsDragging) {
trackTouchEvent(event);
} else {
// Scroll to follow the motion event
pointerIndex = event.findPointerIndex(mActivePointerId);
final float x = event.getX(pointerIndex);
if (Math.abs(x - mDownMotionX) > mScaledTouchSlop) {
setPressed(true);
invalidate();
onStartTrackingTouch();
trackTouchEvent(event);
attemptClaimDrag();
}
}
if (notifyWhileDragging && listener != null) {
updateTouchPosition(pressedThumb.equals(Thumb.MIN));
listener.onRangeSeekBarValuesChanged(
this,
getSelectedMinValue(),
getSelectedMaxValue(),
touchPositionX,
touchPositionY,
pressedThumb.equals(Thumb.MIN));
}
}
break;
case MotionEvent.ACTION_UP:
if (mIsDragging) {
trackTouchEvent(event);
onStopTrackingTouch();
setPressed(false);
} else {
// Touch up when we never crossed the touch slop threshold
// should be interpreted as a tap-seek to that location.
onStartTrackingTouch();
trackTouchEvent(event);
onStopTrackingTouch();
}
pressedThumb = null;
invalidate();
if (listener != null) {
listener.onTouchLeave();
}
break;
case MotionEvent.ACTION_POINTER_DOWN:
{
final int index = event.getPointerCount() - 1;
// final int index = ev.getActionIndex();
mDownMotionX = event.getX(index);
mActivePointerId = event.getPointerId(index);
invalidate();
break;
}
case MotionEvent.ACTION_POINTER_UP:
onSecondaryPointerUp(event);
invalidate();
break;
case MotionEvent.ACTION_CANCEL:
if (mIsDragging) {
onStopTrackingTouch();
setPressed(false);
}
invalidate(); // see above explanation
break;
}
return true;
}
