import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;

public class PrefTrans extends PrefEditor implements java.io.Serializable,ActionListener {

  private static final long serialVersionUID = Version.getSUID();

  public static String ALIGN = "Align";
  public static String UNALIGN = "UnAlign";
  public static String ZERO = "Zero";

  public double x = 0;
  public double y = 0;
  public double scale = 1;
  public double angle = 0;

  CompPane cpane = null;
  Scale scalebar = null;
  Rose rose = null;

  ViewTransform target = null;
  double xoff=0,yoff=0;

  public PrefTrans() {
    name = "Transform";
  }

/*  public PrefTrans(ViewTransform target,double xoff,double yoff) {
    this.target = target;
    this.xoff=xoff;
    this.yoff=yoff;
    Point2D.Double pos = new Point2D.Double(xoff,yoff);
    target.transform(pos,pos);
    pane=null;
    x = pos.getX()-xoff;
    y = pos.getY()-yoff;

    scale = target.scale;
    angle = target.angle*180/Math.PI;
    while (angle < 0) angle += 360;
    while (angle > 360) angle -= 360;
  }
*/

  public PrefTrans(ViewTransform target) {
    pane=null;
    setTarget(target);
  }

  void setTarget(ViewTransform target) {
    this.target = target;
    x = target.getTranslateX();
    y = target.getTranslateY();
    scale = target.scale;
    angle = target.angle*180/Math.PI;

//    System.out.println("old = "+x+" "+y+" "+scale+" "+angle);

    if (target.aligner!=null) {
      x -= target.oldx;
      y -= target.oldy;
      scale /= target.oldscale;
      angle -= target.oldangle*180/Math.PI;
//      System.out.println("rel = "+x+" "+y+" "+scale+" "+angle);
    }

    while (angle < 0) angle += 360;
    while (angle > 360) angle -= 360;
  }

  public PrefTrans(Scale scalebar,Rose rose,CompPane cpane) {
    target=null;
    this.cpane = cpane;
    Point2D pos = cpane.getCenter();
    x = 0; //pos.getX();
    y = 0; //pos.getY();
    this.scalebar = scalebar;
    scale = scalebar.fact;
    this.rose = rose;
    angle = rose.theta*180/Math.PI;
//    view = edit.scroll.getViewport().getViewPosition();
  }
  
  JTextField xfield = null;
  JTextField yfield = null;
  JTextField scalefield = null;
  JTextField rotfield = null;

  public void actionPerformed(ActionEvent e) {
    String command = ((AbstractButton)e.getSource()).getActionCommand();
    if (command == ALIGN) {}
    else if (command == UNALIGN) {
      if (target!=null && target.hasAlignment()) {
        target.clearAlignment(); 
        setTarget(target);
        reset();
      }
    }
    else if (command == ZERO) {
/*      if (target!=null && target.aligners!=null) {
        if (target.aligners[0]!=null)// && !(target.aligners[0] instanceof FixedAligner))
          xfield.setText("0.0");
        if (target.aligners[1]!=null)// && !(target.aligners[1] instanceof FixedAligner))
          yfield.setText("0.0");
        if (target.aligners[2]!=null)// && !(target.aligners[2] instanceof FixedAligner))
          scalefield.setText("1.0");
        if (target.aligners[3]!=null)// && !(target.aligners[3] instanceof FixedAligner))
          rotfield.setText("0.0");
      } else {
        xfield.setText("0.0");
        yfield.setText("0.0");
        scalefield.setText("1.0");
        rotfield.setText("0.0");
      }
*/
    }
  }

  public void newPane() throws NoSuchFieldException {
    setup();

    pane.setLayout(new javax.swing.BoxLayout(pane,javax.swing.BoxLayout.Y_AXIS));
    JPanel sub = new JPanel();
    sub.setLayout(new GridLayout(2,2));
/*
    if (target!=null && target.aligners!=null) {
      xfield = (JTextField)setParm(sub,"x","X ("+FixedAligner.getName(target.aligners[0])+")");
      yfield = (JTextField)setParm(sub,"y","Y ("+FixedAligner.getName(target.aligners[1])+")");
      scalefield = (JTextField)setParm(sub,"scale","Scale ("+FixedAligner.getName(target.aligners[2])+")");
      rotfield = (JTextField)setParm(sub,"angle","Rotation ("+FixedAligner.getName(target.aligners[3])+")");
      
    }
    else {
      xfield = (JTextField)setParm(sub,"x","X");
      yfield = (JTextField)setParm(sub,"y","Y");
      scalefield = (JTextField)setParm(sub,"scale","Scale");
      rotfield =(JTextField)setParm(sub,"angle","Rotation");
      }*/
    pane.add(sub);
    javax.swing.JPanel controls = new javax.swing.JPanel();

    JButton but = new JButton(ZERO);
    but.addActionListener(this);
    controls.add(but);

    if (target!=null) {
//      but = new JButton(ALIGN);
//      but.addActionListener(this);
//      controls.add(but);
      but = new JButton(UNALIGN);
      but.addActionListener(this);
      controls.add(but);
    }

    pane.add(controls);
  }

  public void save() {
    if (pane==null) return;
    super.save();
    apply();
  }

  public void apply() {
    if (cpane!=null) {
      rose.change(angle*Math.PI/180);
      scalebar.change(scale);
    }
    if (target!=null) {
      if (target.aligner!=null) {
        x += target.oldx;
        y += target.oldy;
        scale *= target.oldscale;
        angle += target.oldangle*180/Math.PI;
      }
      target.setTransform(scale,angle*Math.PI/180,x,y);
    }
  }
}