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package ij.plugin;
import ij.*;
import ij.process.*;
import ij.gui.*;
import java.awt.*;
import ij.measure.*;
import ij.plugin.TextReader;
/** This plugin implements the File/Import/XY Coordinates command. It reads a
two column text file, such as those created by File/Save As/XY Coordinates,
as a polygon ROI. The ROI is displayed in the current image or, if the image
is too small, in a new blank image.
*/
public class XY_Reader implements PlugIn {
public void run(String arg) {
TextReader tr = new TextReader();
ImageProcessor ip = tr.open();
if (ip==null)
return;
int width = ip.getWidth();
int height = ip.getHeight();
if (width!=2 || height<3) {
IJ.showMessage("XY Reader", "Two column text file required");
return;
}
float[] x = new float[height];
float[] y = new float[height];
boolean allIntegers = true;
double length = 0.0;
for (int i=0; i<height; i++) {
x[i] = ip.getf(0, i);
y[i] = ip.getf(1, i);
if ((int)x[i]!=x[i] || (int)y[i]!=y[i])
allIntegers = false;
if (i>0) {
double dx = x[i] - x[i-1];
double dy = y[i] - y[i-1];
length += Math.sqrt(dx*dx+dy*dy);
}
}
Roi roi = null;
int type = length/x.length>10?Roi.POLYGON:Roi.FREEROI;
if (allIntegers)
roi = new PolygonRoi(Roi.toIntR(x), Roi.toIntR(y), height, type);
else
roi = new PolygonRoi(x, y, height, type);
Rectangle r = roi.getBoundingRect();
ImagePlus imp = WindowManager.getCurrentImage();
if (imp==null || imp.getWidth()<r.x+r.width || imp.getHeight()<r.y+r.height) {
new ImagePlus(tr.getName(), new ByteProcessor(Math.abs(r.x)+r.width+10, Math.abs(r.y)+r.height+10)).show();
imp = WindowManager.getCurrentImage();
}
if (imp!=null)
imp.setRoi(roi);
}
}
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