private boolean onPageUp(KeyboardEvent event, boolean briefIntroduction) {
if (noContentCheck()) return true;
if (hotPointY <= 0) {
environment.hint(Hints.TABLE_NO_ROWS_ABOVE);
return true;
}
hotPointY -= environment.getAreaVisibleHeight(this);
if (hotPointY < 0) hotPointY = 0;
onNewHotPointY(briefIntroduction);
return true;
}
private boolean onPageDown(KeyboardEvent event, boolean briefIntroduction) {
if (noContentCheck()) return true;
final int count = model.getRowCount();
if (hotPointY >= count) {
environment.hint(Hints.TABLE_NO_ROWS_BELOW);
return true;
}
hotPointY += environment.getAreaVisibleHeight(this);
if (hotPointY >= count) hotPointY = count;
onNewHotPointY(briefIntroduction);
return true;
}