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package ij.plugin;
import ij.*;
import ij.process.*;
import ij.gui.*;
import java.awt.*;
import java.awt.geom.*;
/** This plugin implements the Edit/Selection/Scale command. */
public class RoiScaler implements PlugIn {
private static double defaultXScale = 1.5;
private static double defaultYScale = 1.5;
private double xscale;
private double yscale;
private boolean centered;
public void run(String arg) {
ImagePlus imp = IJ.getImage();
Roi roi = imp.getRoi();
if (roi==null) {
IJ.error("Scale", "This command requires a selection");
return;
}
if (!showDialog())
return;
if (!IJ.macroRunning()) {
defaultXScale = xscale;
defaultYScale = yscale;
}
//if (roi instanceof ImageRoi) {
// ((ImageRoi)roi).rotate(angle);
// imp.draw();
// return;
//}
Roi roi2 = scale(roi, xscale, yscale, centered);
if (roi2==null)
return;
Undo.setup(Undo.ROI, imp);
roi = (Roi)roi.clone();
imp.setRoi(roi2);
Roi.previousRoi = roi;
}
public boolean showDialog() {
GenericDialog gd = new GenericDialog("Scale Selection");
gd.addNumericField("X scale factor:", defaultXScale, 2, 3, "");
gd.addNumericField("Y scale factor:", defaultYScale, 2, 3, "");
gd.addCheckbox("Centered", false);
gd.showDialog();
if (gd.wasCanceled())
return false;
xscale = gd.getNextNumber();
yscale = gd.getNextNumber();
centered = gd.getNextBoolean();
return true;
}
public static Roi scale(Roi roi, double xscale, double yscale, boolean centered) {
if (roi instanceof ShapeRoi)
return scaleShape((ShapeRoi)roi, xscale, yscale, centered);
FloatPolygon poly = roi.getFloatPolygon();
int type = roi.getType();
if (type==Roi.LINE) {
Line line = (Line)roi;
double x1=line.x1d;
double y1=line.y1d;
double x2=line.x2d;
double y2=line.y2d;
poly = new FloatPolygon();
poly.addPoint(x1, y1);
poly.addPoint(x2, y2);
}
Rectangle r = roi.getBounds();
double xbase = r.x - (r.width*xscale-r.width)/2.0;
double ybase = r.y - (r.height*yscale-r.height)/2.0;
for (int i=0; i<poly.npoints; i++) {
if (centered) {
poly.xpoints[i] = (float)((poly.xpoints[i]-r.x)*xscale + xbase);
poly.ypoints[i] = (float)((poly.ypoints[i]-r.y)*yscale + ybase);
} else {
poly.xpoints[i] = (float)(poly.xpoints[i]*xscale);
poly.ypoints[i] = (float)(poly.ypoints[i]*yscale);
}
}
Roi roi2 = null;
if (type==Roi.LINE)
roi2 = new Line(poly.xpoints[0], poly.ypoints[0], poly.xpoints[1], poly.ypoints[1]);
else if (type==Roi.POINT)
roi2 = new PointRoi(poly.xpoints, poly.ypoints,poly.npoints);
else {
if (type==Roi.RECTANGLE)
type = Roi.POLYGON;
if (type==Roi.RECTANGLE && poly.npoints>4) // rounded rectangle
type = Roi.FREEROI;
if (type==Roi.OVAL||type==Roi.TRACED_ROI)
type = Roi.FREEROI;
roi2 = new PolygonRoi(poly.xpoints, poly.ypoints,poly.npoints, type);
}
roi2.setStrokeColor(roi.getStrokeColor());
if (roi.getStroke()!=null)
roi2.setStroke(roi.getStroke());
return roi2;
}
private static Roi scaleShape(ShapeRoi roi, double xscale, double yscale, boolean centered) {
Rectangle r = roi.getBounds();
Shape shape = roi.getShape();
AffineTransform at = new AffineTransform();
at.scale(xscale, yscale);
if (!centered)
at.translate(r.x, r.y);
Shape shape2 = at.createTransformedShape(shape);
Roi roi2 = new ShapeRoi(shape2);
if (centered) {
int xbase = (int)(centered?r.x-(r.width*xscale-r.width)/2.0:r.x);
int ybase = (int)(centered?r.y-(r.height*yscale-r.height)/2.0:r.y);
roi2.setLocation(xbase, ybase);
}
return roi2;
}
}
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