// ---------------------------------------------------------
private synchronized AffineTransform bufferTransform() {
AffineTransform r = new AffineTransform();
for (int i = 0; i < a1.size(); i++) {
int s1 = a1.get(i);
Object s2 = a2.get(i);
Object s3[] = null;
if (s2 instanceof Object[]) s3 = (Object[]) s2;
if (s1 == setTransform) {
r = makeTransform(s2);
}
if (s1 == shear) r.shear((Double) s3[0], (Double) s3[1]);
if (s1 == rotate1) r.rotate((Double) s2);
if (s1 == rotate2) r.rotate((Double) s3[0], (Double) s3[1], (Double) s3[2]);
if (s1 == scale1) r.scale((Double) s3[0], (Double) s3[1]);
if (s1 == translate1) r.translate((Double) s3[0], (Double) s3[1]);
if (s1 == translate2) r.translate((Integer) s3[0], (Integer) s3[1]);
}
return r;
}
/**
* Zoom, preserving the center point on the screen. (When we draw, the center point may be moved
* in order to maximize the amount of image seen on screen.) *
*/
void adjustZoom(double z, Point2D cp) {
if (cp == null) cp = new Point2D.Double(getWidth() / 2, getHeight() / 2);
Point2D cxt = componentToImage(cp);
double tx = cp.getX() - cxt.getX() * z;
double ty = cp.getY() - cxt.getY() * z;
t = new AffineTransform();
t.translate(tx, ty);
t.scale(z, z);
fit = false;
repaint();
}