public void drawScaledImage(BufferedImage im, int x, int y, int w, int h) {
float scaleX = w * 1.0f / im.getWidth();
float scaleY = h * 1.0f / im.getHeight();
AffineTransform tx = new AffineTransform();
tx.scale(scaleX, scaleY);
BufferedImageOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);
drawImage(im, op, x, y);
}
private AffineTransform makeTransform(Object o) {
AffineTransform r = (AffineTransform) ((AffineTransform) o).clone();
// System.out.println("r:"+r);
if (origTransform != null) {
AffineTransform r2 = (AffineTransform) origTransform.clone();
// System.out.println("r2:"+r2);
r2.concatenate(r);
r = r2;
}
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();
}
public void mouseDragged(MouseEvent e) {
int mods = e.getModifiersEx();
Point dragEnd = e.getPoint();
boolean shift = (mods & MouseEvent.SHIFT_DOWN_MASK) > 0;
boolean ctrl = (mods & MouseEvent.CTRL_DOWN_MASK) > 0;
boolean alt = shift & ctrl;
ctrl = ctrl & (!alt);
shift = shift & (!alt);
boolean nomods = !(shift | ctrl | alt);
if (dragBegin == null) dragBegin = dragEnd;
nodrag = false;
if ((mods & InputEvent.BUTTON3_DOWN_MASK) > 0 || true) {
double dx = dragEnd.getX() - dragBegin.getX();
double dy = dragEnd.getY() - dragBegin.getY();
synchronized (JImage.this) {
t.preConcatenate(AffineTransform.getTranslateInstance(dx, dy));
}
dragBegin = dragEnd;
repaint();
}
}
public Point2D componentToImage(Point2D p) {
Point2D tp = null;
try {
tp = t.inverseTransform(p, null);
} catch (NoninvertibleTransformException ex) {
// can't happen.
}
return tp;
}
// ---------------------------------------------------------
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;
}
public synchronized void paint(Graphics gin) {
Graphics2D g = (Graphics2D) gin;
if (im == null) return;
int height = getHeight();
int width = getWidth();
if (fit) {
t = new AffineTransform();
double scale = Math.min(((double) width) / im.getWidth(), ((double) height) / im.getHeight());
// we'll re-center the transform in a moment.
t.scale(scale, scale);
}
// if the image (in either X or Y) is smaller than the view port, then center
// the image with respect to that axis.
double mwidth = im.getWidth() * t.getScaleX();
double mheight = im.getHeight() * t.getScaleY();
if (mwidth < width)
t.preConcatenate(
AffineTransform.getTranslateInstance((width - mwidth) / 2.0 - t.getTranslateX(), 0));
if (mheight < height)
t.preConcatenate(
AffineTransform.getTranslateInstance(0, (height - mheight) / 2.0 - t.getTranslateY()));
// if we're allowing panning (because only a portion of the image is visible),
// don't allow translations that show less information that is possible.
Point2D topleft = t.transform(new Point2D.Double(0, 0), null);
Point2D bottomright = t.transform(new Point2D.Double(im.getWidth(), im.getHeight()), null);
if (mwidth > width) {
if (topleft.getX() > 0)
t.preConcatenate(AffineTransform.getTranslateInstance(-topleft.getX(), 0));
if (bottomright.getX() < width)
t.preConcatenate(AffineTransform.getTranslateInstance(width - bottomright.getX(), 0));
// t.translate(width-bottomright.getX(), 0);
}
if (mheight > height) {
if (topleft.getY() > 0)
t.preConcatenate(AffineTransform.getTranslateInstance(0, -topleft.getY()));
if (bottomright.getY() < height)
t.preConcatenate(AffineTransform.getTranslateInstance(0, height - bottomright.getY()));
}
g.drawImage(im, t, null);
}
// zoom out a notch
void zoomOut(Point2D p) {
double nz = t.getScaleX() * .5;
nz = Math.max(nz, 1.0 / 32.0);
adjustZoom(nz, p);
}
// zoom in a notch
void zoomIn(Point2D p) {
double nz = t.getScaleX() * 2.0;
nz = Math.min(nz, 64);
adjustZoom(nz, p);
}
public void drawScaledImage(BufferedImage im, int x, int y, float scale) {
AffineTransform tx = new AffineTransform();
tx.scale(scale, scale);
BufferedImageOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);
drawImage(im, op, x, y);
}