@Override
public boolean onElementTouchEvent(MotionEvent event) {
// get masked (not specific to a pointer) action
float x = getX() + event.getX();
float y = getY() + event.getY();
int action = event.getActionMasked();
switch (action) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_POINTER_DOWN:
{
movingButton = null;
setPressed(true);
onClickCallback();
invalidate();
return true;
}
case MotionEvent.ACTION_MOVE:
{
checkMovementForAllButtons(x, y);
return true;
}
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
{
setPressed(false);
onReleaseCallback();
checkMovementForAllButtons(x, y);
invalidate();
return true;
}
default:
{
}
}
return true;
}
public boolean checkMovement(float x, float y, DigitalButton movingButton) {
// check if the movement happened in the same layer
if (movingButton.layer != this.layer) {
return false;
}
// save current pressed state
boolean wasPressed = isPressed();
// check if the movement directly happened on the button
if ((this.movingButton == null || movingButton == this.movingButton) && this.inRange(x, y)) {
// set button pressed state depending on moving button pressed state
if (this.isPressed() != movingButton.isPressed()) {
this.setPressed(movingButton.isPressed());
}
}
// check if the movement is outside of the range and the movement button
// is the saved moving button
else if (movingButton == this.movingButton) {
this.setPressed(false);
}
// check if a change occurred
if (wasPressed != isPressed()) {
if (isPressed()) {
// is pressed set moving button and emit click event
this.movingButton = movingButton;
onClickCallback();
} else {
// no longer pressed reset moving button and emit release event
this.movingButton = null;
onReleaseCallback();
}
invalidate();
return true;
}
return false;
}