package ij.plugin;
import ij.*;
import ij.gui.*;
import ij.process.*;
import ij.io.*;
import ij.plugin.filter.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;

/** This plugin implements the Edit/Options/Wand Tool command. */
public class WandToolOptions implements PlugIn, DialogListener {
    private static final String[] modes = {"Legacy", "4-connected", "8-connected"};
    private static String mode = modes[0];
    private static double tolerance;
    private ImagePlus imp;
    private boolean showCheckbox;
    private static int startx, starty;
    private static int ID;

    public void run(String arg) {
        imp = WindowManager.getCurrentImage();
        Roi roi = imp!=null?imp.getRoi():null;
        boolean selection = roi!=null && (roi.getType()==Roi.TRACED_ROI||roi.getType()==Roi.POLYGON);
        if (imp==null || (ID!=0&&imp.getID()!=ID) || !selection)
            startx = starty = 0;
        ID = imp!=null?imp.getID():0;
        double sliderMax = 255;
        int depth = imp!=null?imp.getBitDepth():0;
        if (depth==16 || depth==32) {
            sliderMax = imp.getProcessor().getMax();
            if (depth==32) sliderMax+=0.0000000001;
        }
        showCheckbox = imp!=null && depth!=24 && WindowManager.getFrame("Threshold")==null && !imp.isThreshold();
        GenericDialog gd = new GenericDialog("Wand Tool");
        gd.addSlider("Tolerance: ", 0, sliderMax, tolerance);
        gd.addChoice("Mode:", modes, mode);
        if (showCheckbox)
            gd.addCheckbox("Enable Thresholding", false);
        gd.addCheckbox("Smooth if thresholded", Prefs.smoothWand);
        if (showCheckbox) {
            gd.setInsets(2,0,0);
            gd.addMessage("Thresholded objects are traced and \"Tolerance\"\nis ignored when thresholding is enabled.");
        }
        gd.addDialogListener(this); 
        gd.showDialog();
    }
    
    public boolean dialogItemChanged(GenericDialog gd, AWTEvent e) {
        if (gd.wasCanceled())
            return false;
        tolerance = gd.getNextNumber();
        mode = gd.getNextChoice();
        if (showCheckbox) {
            if (gd.getNextBoolean()) {
                imp.deleteRoi();
                IJ.run("Threshold...");
            }
        }
        Prefs.smoothWand = gd.getNextBoolean();
        if (startx>0||starty>0)
            IJ.doWand(startx, starty, tolerance, mode+(Prefs.smoothWand?" smooth":""));
        return true;
    }

    public static String getMode() {
        return mode;
    }

    public static double getTolerance() {
        return tolerance;
    }
    
    public static final void setStart(int x, int y) {
        startx = x;
        starty = y;
    }

}