private void scroll() {
ScrollBar scrollBar = (ScrollBar) TerraScrollBarSkin.this.getComponent();
int start = scrollBar.getStart();
int end = scrollBar.getEnd();
int extent = scrollBar.getExtent();
int value = scrollBar.getValue();
int adjustment;
if (incrementType == Mouse.ScrollType.UNIT) {
adjustment = direction * scrollBar.getUnitIncrement();
} else {
adjustment = direction * scrollBar.getBlockIncrement();
}
if (adjustment < 0) {
int newValue = Math.max(value + adjustment, start);
scrollBar.setValue(newValue);
if (stopValue != -1 && newValue < stopValue) {
// We've reached the explicit stop value
stop();
}
if (newValue == start) {
// We implicit stop at the minimum scroll bar value
stop();
}
} else {
int newValue = Math.min(value + adjustment, end - extent);
scrollBar.setValue(newValue);
if (stopValue != -1 && newValue > stopValue) {
// We've reached the explicit stop value
stop();
}
if (newValue == end - extent) {
// We implicitly stop at the maximum scroll bar value
stop();
}
}
}
