/**
* Scrolls the canvas horizontally.
*
* @param scrollBar
*/
void scrollHorizontal(ScrollBar scrollBar) {
Rectangle bounds = canvas.getClientArea();
int x = -scrollBar.getSelection();
if (x + maxX < bounds.width) {
x = bounds.width - maxX;
}
canvas.scroll(x, cy, cx, cy, maxX, maxY, false);
cx = x;
}
/**
* Scrolls the canvas vertically.
*
* @param scrollBar
*/
void scrollVertical(ScrollBar scrollBar) {
Rectangle bounds = canvas.getClientArea();
int y = -scrollBar.getSelection();
if (y + maxY < bounds.height) {
y = bounds.height - maxY;
}
canvas.scroll(cx, y, cx, cy, maxX, maxY, false);
cy = y;
}
private static Integer getBarSelection(final ScrollBar scrollBar) {
Integer result;
if (scrollBar != null) {
result = new Integer(scrollBar.getSelection());
} else {
result = null;
}
return result;
}