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package ij.plugin;
import ij.*;
import ij.process.*;
import ij.gui.*;
import ij.measure.Calibration;
import ij.plugin.filter.EDM;
import ij.plugin.filter.ThresholdToSelection;
import ij.plugin.frame.Recorder;
import java.awt.*;
import java.util.Vector;
/** This plugin, which enlarges or shrinks selections, implements the Edit/Selection/Enlarge command. */
public class RoiEnlarger implements PlugIn, DialogListener {
private static final String DISTANCE_KEY = "enlarger.distance";
private static final String USE_PIXELS_KEY = "enlarger.pixels";
private double defaultDistance = Prefs.get(DISTANCE_KEY, 15); // pixels
private boolean defaultUsePixels = Prefs.get(USE_PIXELS_KEY, false);
private Calibration cal;
private Label unitsLabel;
public void run(String arg) {
ImagePlus imp = IJ.getImage();
Roi roi = imp.getRoi();
if (roi==null || roi.isLine()) {
IJ.error("Enlarge", "This command requires an area selection");
return;
}
if (!imp.okToDeleteRoi())
return;
double n = showDialog(imp, defaultDistance);
if (Double.isNaN(n))
return;
Prefs.set(DISTANCE_KEY, defaultDistance);
Prefs.set(USE_PIXELS_KEY, defaultUsePixels);
Roi roi2 = Math.abs(n)<256?enlarge255(roi,n):enlarge(roi,n);
if (roi2!=null) {
imp.setRoi(roi2);
Roi.setPreviousRoi(roi);
defaultDistance = n;
}
int pixels = (int)Math.round(n);
Recorder.recordCall("RoiEnlarger.enlarge(imp, "+pixels+");");
}
public static void enlarge(ImagePlus imp, int pixels) {
Roi roi = imp.getRoi();
if (roi==null || roi.isLine() || (roi instanceof PointRoi))
return;
Roi roi2 = Math.abs(pixels)<256?enlarge255(roi,pixels):enlarge(roi,pixels);
if (roi2!=null)
imp.setRoi(roi2);
}
public double showDialog(ImagePlus imp, double pixels) {
cal = imp.getCalibration();
boolean scaled = cal.scaled();
double pixelWidth = cal.pixelWidth;
boolean xyScaleDifferent = scaled && cal.pixelWidth != cal.pixelHeight;
boolean usePixels = defaultUsePixels;
double n = pixels;
int decimalPlaces = 0;
if (scaled && !usePixels) {
n *= pixelWidth;
decimalPlaces = getDecimalPlaces(pixelWidth, n);
}
GenericDialog gd = new GenericDialog("Enlarge Selection");
gd.addNumericField("Enlarge by", n, decimalPlaces);
String units = scaled && !usePixels ? cal.getUnits()+" " : "pixels ";
gd.addToSameRow();
gd.addMessage(units.replace('\n', ' ')); //just in case of a newline character, which would make it a MultiLineLabel
unitsLabel = (Label)gd.getMessage();
if (scaled) {
gd.setInsets(0, 20, 0); //top left bottom
gd.addCheckbox("Pixel units", usePixels);
}
gd.setInsets(10, 0, 0);
gd.addMessage("Enter negative number to shrink", null, Color.darkGray);
if (xyScaleDifferent) {
gd.setInsets(5, 0, 0);
gd.addMessage(" \n ", null, Color.RED);
}
gd.addDialogListener(this);
if (xyScaleDifferent && Macro.getOptions()==null)
updateWarning(gd); //in interactive mode only
gd.showDialog();
if (gd.wasCanceled())
return Double.NaN;
n = gd.getNextNumber();
if (scaled)
usePixels = gd.getNextBoolean();
pixels = usePixels ? n : n/pixelWidth;
defaultDistance = pixels;
defaultUsePixels = usePixels;
return pixels;
}
public boolean dialogItemChanged(GenericDialog gd, AWTEvent e) {
Vector checkboxes = gd.getCheckboxes();
Checkbox usePixelsCbx = checkboxes == null ? null : (Checkbox)checkboxes.get(0);
double n = gd.getNextNumber();
boolean usePixels = cal.scaled() ? gd.getNextBoolean() : true; //getNextBoolean also needed for macro recorded
if (e!=null && e.getSource() == usePixelsCbx) {
double pixelWidth = cal.pixelWidth;
int decimalPlaces = 0;
if (usePixels) {
n /= pixelWidth; //scaled to pixels
} else {
n *= pixelWidth; //pixels to scaled
decimalPlaces = getDecimalPlaces(pixelWidth, n);
}
TextField numberField = (TextField)gd.getNumericFields().get(0);
numberField.setText(IJ.d2s(n, decimalPlaces));
if (unitsLabel != null) unitsLabel.setText(usePixels ? "pixels" : cal.getUnits());
boolean xyScaleDifferent = cal.scaled() && cal.pixelWidth != cal.pixelHeight;
if (xyScaleDifferent && usePixelsCbx != null) updateWarning(gd);
}
return !gd.invalidNumber();
}
private void updateWarning(GenericDialog gd) {
Checkbox usePixelsCbx = (Checkbox)gd.getCheckboxes().get(0);
MultiLineLabel warningLabel = (MultiLineLabel)gd.getMessage();
boolean showWarning = !usePixelsCbx.getState(); //warn if not pixels units
warningLabel.setText(showWarning ? "WARNING: x & y scales differ\nConversion to pixels uses x scale" : " \n ");
}
//decimal places for displaying the scaled enlarge/shrink value
private static int getDecimalPlaces(double pixelWidth, double number) {
if (number == (int)number || pixelWidth == 1) return 0;
int decimalPlaces = (int)(-Math.log10(pixelWidth)+1.9);
if (decimalPlaces < 0) decimalPlaces = 0;
if (decimalPlaces >9) decimalPlaces = 9;
return decimalPlaces;
}
public static Roi enlarge(Roi roi, double pixels) {
if (pixels==0)
return roi;
int type = roi.getType();
int n = (int)Math.round(pixels);
if (type==Roi.RECTANGLE || type==Roi.OVAL)
return enlargeRectOrOval(roi, n);
if (n<0)
return shrink(roi, -n);
Rectangle bounds = roi.getBounds();
int width = bounds.width;
int height = bounds.height;
width += 2*n + 2;
height += 2*n + 2;
ImageProcessor ip = new ByteProcessor(width, height);
ip.invert();
roi.setLocation(n+1, n+1);
ip.setColor(0);
ip.fill(roi);
ip.setThreshold(0, 0, ImageProcessor.NO_LUT_UPDATE);
Roi roi2 = (new ThresholdToSelection()).convert(ip);
Rectangle bounds2 = roi2.getBounds();
int xoffset = bounds2.x - (n+1);
int yoffset = bounds2.y - (n+1);
roi.setLocation(bounds.x, bounds.y);
FloatProcessor edm = new EDM().makeFloatEDM (ip, 0, false);
edm.setThreshold(0, n, ImageProcessor.NO_LUT_UPDATE);
roi2 = (new ThresholdToSelection()).convert(edm);
if (roi2==null)
return roi;
roi2.copyAttributes(roi);
roi2.setLocation(bounds.x-n+xoffset, bounds.y-n+yoffset);
if (roi.getStroke()!=null)
roi2.setStroke(roi.getStroke());
return roi2;
}
private static Roi enlargeRectOrOval(Roi roi, int n) {
Rectangle bounds = roi.getBounds();
bounds.x -= n;
bounds.y -= n;
bounds.width += 2*n;
bounds.height += 2*n;
if (bounds.width<=0 || bounds.height<=0)
return roi;
Roi roi2 = null;
if (roi.getType()==Roi.RECTANGLE)
roi2 = new Roi(bounds.x, bounds.y, bounds.width, bounds.height);
else
roi2 = new OvalRoi(bounds.x, bounds.y, bounds.width, bounds.height);
roi2.copyAttributes(roi);
return roi2;
}
private static Roi shrink(Roi roi, int n) {
Rectangle bounds = roi.getBounds();
int width = bounds.width + 2;
int height = bounds.height + 2;
ImageProcessor ip = new ByteProcessor(width, height);
roi.setLocation(1, 1);
ip.setColor(255);
ip.fill(roi);
roi.setLocation(bounds.x, bounds.y);
FloatProcessor edm = new EDM().makeFloatEDM (ip, 0, false);
edm.setThreshold(n+1, Float.MAX_VALUE, ImageProcessor.NO_LUT_UPDATE);
Roi roi2 = (new ThresholdToSelection()).convert(edm);
if (roi2==null)
return roi;
Rectangle bounds2 = roi2.getBounds();
if (bounds2.width<=0 && bounds2.height<=0)
return roi;
roi2.copyAttributes(roi);
roi2.setLocation(bounds.x+bounds2.x-1, bounds.y+bounds2.y-1);
return roi2;
}
public static Roi enlarge255(Roi roi, double pixels) {
if (pixels==0)
return roi;
int type = roi.getType();
int n = (int)Math.round(pixels);
if (type==Roi.RECTANGLE || type==Roi.OVAL)
return enlargeRectOrOval(roi, n);
if (n<0)
return shrink255(roi, -n);
Rectangle bounds = roi.getBounds();
int width = bounds.width;
int height = bounds.height;
width += 2*n + 2;
height += 2*n + 2;
ImageProcessor ip = new ByteProcessor(width, height);
ip.invert();
roi.setLocation(n+1, n+1);
ip.setColor(0);
ip.fill(roi);
ip.setThreshold(0, 0, ImageProcessor.NO_LUT_UPDATE);
Roi roi2 = (new ThresholdToSelection()).convert(ip);
Rectangle bounds2 = roi2.getBounds();
int xoffset = bounds2.x - (n+1);
int yoffset = bounds2.y - (n+1);
roi.setLocation(bounds.x, bounds.y);
boolean bb = Prefs.blackBackground;
Prefs.blackBackground = true;
new EDM().toEDM(ip);
Prefs.blackBackground = bb;
ip.setThreshold(0, n, ImageProcessor.NO_LUT_UPDATE);
roi2 = (new ThresholdToSelection()).convert(ip);
if (roi2==null)
return roi;
roi2.copyAttributes(roi);
roi2.setLocation(bounds.x-n+xoffset, bounds.y-n+yoffset);
if (roi.getStroke()!=null)
roi2.setStroke(roi.getStroke());
return roi2;
}
private static Roi shrink255(Roi roi, int n) {
Rectangle bounds = roi.getBounds();
int width = bounds.width + 2;
int height = bounds.height + 2;
ImageProcessor ip = new ByteProcessor(width, height);
roi.setLocation(1, 1);
ip.setColor(255);
ip.fill(roi);
roi.setLocation(bounds.x, bounds.y);
boolean bb = Prefs.blackBackground;
Prefs.blackBackground = true;
new EDM().toEDM(ip);
Prefs.blackBackground = bb;
ip.setThreshold(n+1, 255, ImageProcessor.NO_LUT_UPDATE);
Roi roi2 = (new ThresholdToSelection()).convert(ip);
if (roi2==null)
return roi;
Rectangle bounds2 = roi2.getBounds();
if (bounds2.width<=0 && bounds2.height<=0)
return roi;
roi2.copyAttributes(roi);
roi2.setLocation(bounds.x+bounds2.x-1, bounds.y+bounds2.y-1);
return roi2;
}
}
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