gt:     for(int a=0;a<cnt;a++) {
context: /** Image Layers
   *
   * Created : Jan 25, 2015
   *
   * @author pquiring
   */
  
  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
  
  public class LayersWindow extends javax.swing.JFrame implements ActionListener {
  
    /**
     * Creates new form ImageLayers
     */
    public LayersWindow(MainPanel mainPanel) {
      this.mainPanel = mainPanel;
  //    setUndecorated(true);
      initComponents();
      setAlwaysOnTop(true);
    }
  
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {
  
      panel = new javax.swing.JPanel();
      jToolBar1 = new javax.swing.JToolBar();
      bAdd = new javax.swing.JButton();
      bDel = new javax.swing.JButton();
      bDup = new javax.swing.JButton();
      bMerge = new javax.swing.JButton();
      bUp = new javax.swing.JButton();
      bDown = new javax.swing.JButton();
      bEdit = new javax.swing.JButton();
  
      setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
      setTitle("Image Layers");
      setFocusable(false);
      setFocusableWindowState(false);
      setResizable(false);
      addWindowListener(new java.awt.event.WindowAdapter() {
        public void windowClosed(java.awt.event.WindowEvent evt) {
          formWindowClosed(evt);
        }
      });
  
      javax.swing.GroupLayout panelLayout = new javax.swing.GroupLayout(panel);
      panel.setLayout(panelLayout);
      panelLayout.setHorizontalGroup(
        panelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 0, Short.MAX_VALUE)
      );
      panelLayout.setVerticalGroup(
        panelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 279, Short.MAX_VALUE)
      );
  
      jToolBar1.setFloatable(false);
      jToolBar1.setRollover(true);
  
      bAdd.setIcon(new javax.swing.ImageIcon(getClass().getResource("/addlayer.png"))); // NOI18N
      bAdd.setToolTipText("Add Layer");
      bAdd.setFocusable(false);
      bAdd.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bAdd.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bAdd.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bAddActionPerformed(evt);
        }
      });
      jToolBar1.add(bAdd);
  
      bDel.setIcon(new javax.swing.ImageIcon(getClass().getResource("/dellayer.png"))); // NOI18N
      bDel.setToolTipText("Delete Layer");
      bDel.setFocusable(false);
      bDel.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bDel.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bDel.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bDelActionPerformed(evt);
        }
      });
      jToolBar1.add(bDel);
  
      bDup.setIcon(new javax.swing.ImageIcon(getClass().getResource("/duplayer.png"))); // NOI18N
      bDup.setToolTipText("Duplicate Layer");
      bDup.setFocusable(false);
      bDup.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bDup.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bDup.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bDupActionPerformed(evt);
        }
      });
      jToolBar1.add(bDup);
  
      bMerge.setIcon(new javax.swing.ImageIcon(getClass().getResource("/mergelayer.png"))); // NOI18N
      bMerge.setToolTipText("Merge Layer Up");
      bMerge.setFocusable(false);
      bMerge.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bMerge.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bMerge.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bMergeActionPerformed(evt);
        }
      });
      jToolBar1.add(bMerge);
  
      bUp.setIcon(new javax.swing.ImageIcon(getClass().getResource("/movelayerup.png"))); // NOI18N
      bUp.setToolTipText("Move Layer Up");
      bUp.setFocusable(false);
      bUp.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bUp.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bUp.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bUpActionPerformed(evt);
        }
      });
      jToolBar1.add(bUp);
  
      bDown.setIcon(new javax.swing.ImageIcon(getClass().getResource("/movelayerdown.png"))); // NOI18N
      bDown.setToolTipText("Move Layer Down");
      bDown.setFocusable(false);
      bDown.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bDown.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bDown.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bDownActionPerformed(evt);
        }
      });
      jToolBar1.add(bDown);
  
      bEdit.setIcon(new javax.swing.ImageIcon(getClass().getResource("/editlayer.png"))); // NOI18N
      bEdit.setToolTipText("Edit Layer Properties");
      bEdit.setFocusable(false);
      bEdit.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
      bEdit.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
      bEdit.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
          bEditActionPerformed(evt);
        }
      });
      jToolBar1.add(bEdit);
  
      javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
      getContentPane().setLayout(layout);
      layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addComponent(jToolBar1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
      );
      layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
          .addComponent(panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
          .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
          .addComponent(jToolBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
      );
  
      pack();
    }// </editor-fold>//GEN-END:initComponents
  
    private void formWindowClosed(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowClosed
      mainPanel.layers = null;
    }//GEN-LAST:event_formWindowClosed
  
    private void bAddActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bAddActionPerformed
      mainPanel.addLayer();
      setup(pc);
    }//GEN-LAST:event_bAddActionPerformed
  
    private void bDelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bDelActionPerformed
      mainPanel.delLayer();
      setup(pc);
    }//GEN-LAST:event_bDelActionPerformed
  
    private void bEditActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bEditActionPerformed
      mainPanel.editLayer();
      setup(pc);
    }//GEN-LAST:event_bEditActionPerformed
  
    private void bDupActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bDupActionPerformed
      mainPanel.dupLayer();
      setup(pc);
    }//GEN-LAST:event_bDupActionPerformed
  
    private void bMergeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bMergeActionPerformed
      mainPanel.mergeLayer();
      setup(pc);
    }//GEN-LAST:event_bMergeActionPerformed
  
    private void bUpActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bUpActionPerformed
      mainPanel.moveLayerUp();
      setup(pc);
    }//GEN-LAST:event_bUpActionPerformed
  
    private void bDownActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bDownActionPerformed
      mainPanel.moveLayerDown();
      setup(pc);
    }//GEN-LAST:event_bDownActionPerformed
  
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton bAdd;
    private javax.swing.JButton bDel;
    private javax.swing.JButton bDown;
    private javax.swing.JButton bDup;
    private javax.swing.JButton bEdit;
    private javax.swing.JButton bMerge;
    private javax.swing.JButton bUp;
    private javax.swing.JToolBar jToolBar1;
    private javax.swing.JPanel panel;
    // End of variables declaration//GEN-END:variables
  
    private MainPanel mainPanel;
    private ButtonGroup group;
    private PaintCanvas pc;
    private JRadioButton actives[];
    private JCheckBox shows[];
  
    public void setup(PaintCanvas pc) {
      this.pc = pc;
      group = new ButtonGroup();
      panel.removeAll();
      int cnt = pc.getImageLayers();
      panel.setLayout(new GridLayout(cnt, 2));
      Insets zero = new Insets(0,0,0,0);
      actives = new JRadioButton[cnt];
      shows = new JCheckBox[cnt];
  
  