Application: gvSIG desktop » gvSIG tools: ToolBox

package es.unex.sextante.nonSpatial.calculator;

import info.clearthought.layout.TableLayout;

import info.clearthought.layout.TableLayoutConstants;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JPanel;

import javax.swing.JTextArea;

public class CalculatorKeysPanel

         extends

            JPanel {

   private JTextArea m_TextExpression = null;

   private JButton   jButtonMinus;

   private JButton   jButtonDivide;

   private JButton   jButton2;

   private JButton   jButtonDot;

   private JButton   jButtonBrackets;

   private JButton   jButton0;

   private JButton   jButton9;

   private JButton   jButton8;

   private JButton   jButton7;

   private JButton   jButton6;

   private JButton   jButton5;

   private JButton   jButton4;

   private JButton   jButton3;

   private JButton   jButton1;

   private JButton   jButtonMultiply;

   private JButton   jButtonPlus;

   public CalculatorKeysPanel(final JTextArea textExpression) {

      super();

      m_TextExpression = textExpression;

      initialize();

   }

   private void initialize() {

      final ActionListener listener = new ActionListener() {

         public void actionPerformed(ActionEvent evt) {

            addText(evt.getSource());

         }

      };

      final ActionListener listenerBrackets = new ActionListener() {

         public void actionPerformed(ActionEvent evt) {

            m_TextExpression.insert(" ()", m_TextExpression.getCaretPosition());

            m_TextExpression.setCaretPosition(m_TextExpression.getCaretPosition() - 1);

         }

      };

      final TableLayout thisLayout = new TableLayout(

               new double[][] {

                        { TableLayoutConstants.FILL, 10.0, TableLayoutConstants.FILL, TableLayoutConstants.FILL,

                                 TableLayoutConstants.FILL },

                        { TableLayoutConstants.FILL, TableLayoutConstants.FILL, TableLayoutConstants.FILL,

                                 TableLayoutConstants.FILL } });

      thisLayout.setHGap(5);

      thisLayout.setVGap(5);

      this.setLayout(thisLayout);

      this.setPreferredSize(new java.awt.Dimension(284, 239));

      {

         jButtonPlus = new JButton();

         this.add(jButtonPlus, "0, 0");

         jButtonPlus.setText("+");

         jButtonPlus.addActionListener(listener);

      }

      {

         jButtonMinus = new JButton();

         this.add(jButtonMinus, "0, 1");

         jButtonMinus.setText("-");

         jButtonMinus.addActionListener(listener);

      }

      {

         jButtonMultiply = new JButton();

         this.add(jButtonMultiply, "0, 2");

         jButtonMultiply.setText("*");

         jButtonMultiply.addActionListener(listener);

      }

      {

         jButtonDivide = new JButton();

         this.add(jButtonDivide, "0, 3");

         jButtonDivide.setText("/");

         jButtonDivide.addActionListener(listener);

      }

      {

         jButton1 = new JButton();

         this.add(jButton1, "2, 2");

         jButton1.setText("1");

         jButton1.addActionListener(listener);

      }

      {

         jButton2 = new JButton();

         this.add(jButton2, "3, 2");

         jButton2.setText("2");

         jButton2.addActionListener(listener);

      }

      {

         jButton3 = new JButton();

         this.add(jButton3, "4, 2");

         jButton3.setText("3");

         jButton3.addActionListener(listener);

      }

      {

         jButton4 = new JButton();

         this.add(jButton4, "2, 1");

         jButton4.setText("4");

         jButton4.addActionListener(listener);

      }

      {

         jButton5 = new JButton();

         this.add(jButton5, "3, 1");

         jButton5.setText("5");

         jButton5.addActionListener(listener);

      }

      {

         jButton6 = new JButton();

         this.add(jButton6, "4, 1");

         jButton6.setText("6");

         jButton6.addActionListener(listener);

      }

      {

         jButton7 = new JButton();

         this.add(jButton7, "2, 0");

         jButton7.setText("7");

         jButton7.addActionListener(listener);

      }

      {

         jButton8 = new JButton();

         this.add(jButton8, "3, 0");

         jButton8.setText("8");

         jButton8.addActionListener(listener);

      }

      {

         jButton9 = new JButton();

         this.add(jButton9, "4, 0");

         jButton9.setText("9");

         jButton9.addActionListener(listener);

      }

      {

         jButton0 = new JButton();

         this.add(jButton0, "2, 3");

         jButton0.setText("0");

         jButton0.addActionListener(listener);

      }

      {

         jButtonDot = new JButton();

         this.add(jButtonDot, "4, 3");

         jButtonDot.setText(".");

         jButtonDot.addActionListener(listener);

      }

      {

         jButtonBrackets = new JButton();

         this.add(jButtonBrackets, "3, 3");

         jButtonBrackets.setText("( )");

         jButtonBrackets.addActionListener(listenerBrackets);

      }

   }

   private void addText(final Object source) {

      if (source instanceof JButton) {

         String s = ((JButton) source).getText();

         try {

            final int i = Integer.parseInt(s);

         }

         catch (final NumberFormatException e) {

            s = " " + s + " ";

         }

         m_TextExpression.insert(s, m_TextExpression.getCaretPosition());

      }

   }

}