package edu.jsu.leathrum.mathlets.shared;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Dimension;

abstract public class AButtonSet extends JPanel  implements ActionListener, 
    FieldHandler {

  RepeatingButton plusButton = new RepeatingButton("+");
  RepeatingButton minusButton = new RepeatingButton("-");
  FormattedLabel number = new FormattedLabel("");
  String name = "";
  String value = "";
  String after = "    "; // for a bit of growth space; can be overridden
  Box b1 = new Box(BoxLayout.X_AXIS);
  Box b2 = new Box(BoxLayout.X_AXIS);
  Box b3 = new Box(BoxLayout.Y_AXIS);

  public AButtonSet() {
    b1.add(Box.createHorizontalGlue());
    b1.add(number);
    b2.add(Box.createHorizontalGlue());
    b2.add(minusButton);
    b2.add(plusButton);
    b3.add(b1);
    b3.add(b2);
    add(b3);

    plusButton.addActionListener(this);
    minusButton.addActionListener(this);
    plusButton.setRepeat(0,0);
    minusButton.setRepeat(0,0);

    setOpaque(false);
    b1.setOpaque(false);
    b2.setOpaque(false);
    b3.setOpaque(false);
    plusButton.setOpaque(false);
    minusButton.setOpaque(false);
  }

  public void setRepeat(int bf, int bt) {
    plusButton.setRepeat(bf,bt);
    minusButton.setRepeat(bf,bt);
  }

  public void setRepeat() {
    setRepeat(500,200);
  }

  private void setText() {
    number.setText(name + AMathlet.getProperty("equal") + value + after);
      number.repaint();
  }

  public void setName(String newName) {
    name = newName;
    // this seems like as good a time as any to adjust the buttons
    // first, make sure the labels are right
    plusButton.setText(AMathlet.getProperty("plusbutton"));
    minusButton.setText(AMathlet.getProperty("minusbutton"));
    // make the buttons as small as possible
    plusButton.setMargin(new Insets(0,0,0,0));
    minusButton.setMargin(new Insets(0,0,0,0));
    // get these smallest dimensions
    Dimension ps = plusButton.getMinimumSize();
    Dimension ms = minusButton.getMinimumSize();
    // find the largest one
    int mx = Math.max(Math.max(ps.height,ps.width),Math.max(ms.height,ms.width));
    // adjust margins so that both buttons are square, and the same size, mx-by-mx
    plusButton.setMargin(new Insets((mx-ps.height)/2,(mx-ps.width)/2,(mx-ps.height)/2,(mx-ps.width)/2));
    minusButton.setMargin(new Insets((mx-ms.height)/2,(mx-ms.width)/2,(mx-ms.height)/2,(mx-ms.width)/2));

    setText();
  }

  public void setValueString(String newValue) {
    value = newValue;
    setText();
  }

  public String getValueString() {
    return value;
  }

  public void setAfter(String s) {
    after = s;
    setText();
  }

  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == plusButton) {
      plusAction();
      setText();
    }
    else if (e.getSource() == minusButton) {
      minusAction();
      setText();
    }
  }

  String def = "";

  public void setDefault(String dval) {
    def = dval;
  }

  public void setToDefault() {
    setValueString(def);
  }

  public void setField(String val) {
    setValueString(val);
  }

  public String getField() {
    return getValueString();
  }
  
  protected abstract void plusAction();
  protected abstract void minusAction();
}