I am trying to implement a scollable celltable and this particular
table can contains thousands of elements.So I want to implement a
behavior in which if i scroll down new elements should be added and
old elements should be deleted(from the beginning) from the celltable.
I am keeping page view size of 50 records and on every scroll, I am
fetching 20 new records appending to celltable via scrollpanel's
scroll handler and also removing elements.
Now the problem is that scrolling is not working when i remove
elements.
code:
scrollable.addScrollHandler(new ScrollHandler() {
public void onScroll(ScrollEvent event) {
// If scrolling up, ignore the event.
HasRows display = (HasRows) table;
int oldScrollPos = lastScrollPos;
lastScrollPos = scrollable.getScrollPosition();
if (oldScrollPos >= lastScrollPos) {
return;
}
if (display == null) {
return;
}
int maxScrollTop =
scrollable.getWidget().getOffsetHeight()
- scrollable.getOffsetHeight();
if (lastScrollPos >= maxScrollTop) {
// We are near the end, so increase the
page size.
int newPageSize =
Math.min(display.getVisibleRange()
.getLength() +
incrementSize, display.getRowCount());
getDataDisp();
for (int i = start; i < dispcnt; i++) {
disp.add(disp20.get(i));
//disp.remove(0);
}
for (int j = 0; j < dispcnt; j++) {
disp.remove(0);
}
dispcnt = 0;
table.setRowCount(disp.size() ,true);
table.setRowData(disp);
}
}
});
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