コード例 #1
0
  public void ensureSelectionVisible(boolean forceTopSelection) {
    if (isSelectionVisible() && !forceTopSelection) {
      return;
    }

    if (!forceTopSelection) {
      ListScrollingUtil.ensureIndexIsVisible(myList, myList.getSelectedIndex(), 1);
      return;
    }

    // selected item should be at the top of the visible list
    int top = myList.getSelectedIndex();
    if (top > 0) {
      top--; // show one element above the selected one to give the hint that there are more
             // available via scrolling
    }

    int firstVisibleIndex = myList.getFirstVisibleIndex();
    if (firstVisibleIndex == top) {
      return;
    }

    ListScrollingUtil.ensureRangeIsVisible(
        myList, top, top + myList.getLastVisibleIndex() - firstVisibleIndex);
  }
コード例 #2
0
 private boolean isSelectionVisible() {
   return ListScrollingUtil.isIndexFullyVisible(myList, myList.getSelectedIndex());
 }