@Override
public void onLoad() {
if (_isInitialLoad) {
_isInitialLoad = false;
}
DragController.get().addDragEventsHandler(this);
DragController.get().addSwipeEventHandler(this);
}
@Override
public void onDragStart(DragEvent e) {
int matrix = getMatrixY(getWidget().getElement());
int current = getTranslateY(getWidget().getElement());
if (current != matrix) { // scroll on going
setTransitionDuration(getWidget().getElement(), 0);
int diff = current - matrix;
int offset = diff > 2 ? 2 : diff > -2 ? diff : -2;
setTranslateY(getWidget().getElement(), matrix + offset);
DragController.get().suppressClickEvent();
} else {
setTransitionDuration(getWidget().getElement(), 0);
}
}
@Override
public void onDragEnd(DragEvent e) {
DragController.get().releaseDragCapture(this);
}
@Override
public void onDragStart(DragEvent e) {
DragController.get().captureDragEvents(this);
int value = computeNewValue(e);
setValue(value);
}
@Override
public void onUnload() {
DragController.get().removeDragEventsHandler(this);
}
@Override
public void onLoad() {
super.onLoad();
DragController.get().addDragEventsHandler(this);
}
@Override
protected void onUnload() {
DragController.get().removeSwipeEventHandler(this);
super.onUnload();
}