package ij.plugin.filter;
import ij.*;
import ij.process.*;
import ij.gui.*;
import ij.measure.Calibration;
import java.awt.*;
import java.awt.image.*;

/** Implements the flip and rotate commands in the Image/Transformations submenu. */
public class Transformer implements PlugInFilter {
    
    ImagePlus imp;
    String arg;

    public int setup(String arg, ImagePlus imp) {
        this.arg = arg;
        this.imp = imp;
        if (arg.equals("fliph") || arg.equals("flipv"))
            return IJ.setupDialog(imp, DOES_ALL+NO_UNDO);
        else
            return DOES_ALL+NO_UNDO+NO_CHANGES;
    }

    public void run(ImageProcessor ip) {
        if (arg.equals("fliph")) {
            ip.flipHorizontal();
            return;
        }
        if (arg.equals("flipv")) {
            ip.flipVertical();
            return;
        }
        if (arg.equals("right") || arg.equals("left")) {
            StackProcessor sp = new StackProcessor(imp.getStack(), ip);
            ImageStack s2 = null;
            if (arg.equals("right"))
                s2 = sp.rotateRight();
            else
                s2 = sp.rotateLeft();
            Calibration cal = imp.getCalibration();
            imp.setStack(null, s2);
            double pixelWidth = cal.pixelWidth;
            cal.pixelWidth = cal.pixelHeight;
            cal.pixelHeight = pixelWidth;
            return;
        }
    }

}