// CG.java
// 
// Mark F. Hulber
// May 1996
//
// CG lays out and initializes the environment for the CG Drawing Board.
//    Instantiations include the drawing board, buttons, a text field and
//    other panels.  The class Events inherits from CG and handles the
//    events associated with all of the panels on the drawing board.
//
//

import java.awt.*;

public class CG extends Frame {

   Button clear, quit, about;
   Choice algo;
   TextField textarea;
   WorkArea workarea;
   Font thefont;

   Panel panel1, panel2;
   Panel buttonpanel;

   GridBagLayout gridbag = new GridBagLayout();

   public CG(String title){
   
      super(title);
      thefont = new Font("Helvetica", Font.BOLD, 14);            
      clear = new Button("Clear");
      clear.setForeground(Color.white);
      clear.setBackground(Color.black);
      clear.setFont(thefont);
 
      quit = new Button("Quit");
      quit.setForeground(Color.white);
      quit.setBackground(Color.black);
      quit.setFont(thefont);      

      about = new Button("About");
      about.setForeground(Color.white);
      about.setBackground(Color.black);
      about.setFont(thefont);

      algo = new Choice();
      algo.addItem("Gift Wrap");
      algo.addItem("Graham Scan");
      algo.setForeground(Color.white);
      algo.setBackground(Color.black);
      algo.setFont(thefont);

      textarea = new TextField(25);
      textarea.setForeground(Color.white);
      textarea.setBackground(Color.black);
      textarea.setFont(thefont);
      textarea.setEditable(false);

      workarea = new WorkArea(clear, textarea, algo);
      workarea.setForeground(Color.yellow);
      workarea.setBackground(Color.blue);
      workarea.setFont(thefont);

      panel2 = new Panel();
      panel2.setForeground(Color.white);
      panel2.setBackground(Color.black);
      panel2.setFont(thefont);
      panel2.setLayout(gridbag);
      
     

      constrain(panel2, new Label("Info"), 0, 0, 1, 1);
      constrain(panel2, textarea, 0, 1, 1, 3, GridBagConstraints.NONE,
                GridBagConstraints.WEST, 1.0, 0.0, 0, 0, 0, 0);
      constrain(panel2, new Label("Drawing Area"), 0, 4, 1, 1, 10, 0, 0, 0);
      constrain(panel2, workarea, 0, 5, 1, 5, GridBagConstraints.BOTH, 
                GridBagConstraints.CENTER, 1.0, 1.0, 0, 0, 0, 0);


      buttonpanel = new Panel();
      buttonpanel.setForeground(Color.white);
      buttonpanel.setBackground(Color.black);
      buttonpanel.setFont(thefont);
      buttonpanel.setLayout(new FlowLayout());
      buttonpanel.setLayout(gridbag);
      constrain(buttonpanel, clear, 0, 0, 1, 1, GridBagConstraints.NONE,
                GridBagConstraints.CENTER, 0.3, 0.0, 0, 0, 0, 0);
      constrain(buttonpanel, quit, 1, 0, 1, 1, GridBagConstraints.NONE,
                GridBagConstraints.CENTER, 0.3, 0.0, 0, 0, 0, 0);
      constrain(buttonpanel, about, 2, 0, 1, 1, GridBagConstraints.NONE,
                GridBagConstraints.CENTER, 0.3, 0.0, 0, 0, 0, 0);
      constrain(buttonpanel, algo, 3, 0, 1, 1, GridBagConstraints.NONE,
                GridBagConstraints.CENTER, 0.3, 0.0, 0, 0, 0, 0);
      this.setLayout(gridbag);

      constrain(this, panel2, 1, 0, 1, 1, GridBagConstraints.BOTH,
                GridBagConstraints.CENTER, 1.0, 1.0, 10, 10, 5, 10);
      constrain(this, buttonpanel, 0, 1, 2, 1, GridBagConstraints.HORIZONTAL,
                GridBagConstraints.CENTER, 1.0, 0.0, 5, 0, 0, 0);

   }

public void constrain(Container container, Component component,
                      int grid_x, int grid_y, int grid_width, int grid_height,
                      int fill, int anchor, double weight_x, double weight_y,
                      int top, int left, int bottom, int right) {


   GridBagConstraints c = new GridBagConstraints();
   c.gridx = grid_x; c.gridy = grid_y;
   c.gridwidth = grid_width; c.gridheight = grid_height;
   c.fill = fill; c.anchor = anchor;
   c.weightx = weight_x; c.weighty = weight_y;
   if (top+bottom+left+right>0)
      c.insets = new Insets(top, left, bottom, right);

   ((GridBagLayout)container.getLayout()).setConstraints(component, c);
   container.add(component);

}


public void constrain(Container container, Component component,
                      int grid_x, int grid_y, int grid_width, int grid_height)

{
   constrain(container, component, grid_x, grid_y, grid_width, grid_height,
             GridBagConstraints.NONE, GridBagConstraints.NORTHWEST, 0.0, 0.0,
             0, 0, 0, 0);

}

public void constrain(Container container, Component component, 
                      int grid_x, int grid_y, int grid_width, int grid_height,
                      int top, int left, int bottom, int right) {
   constrain(container, component, grid_x, grid_y, grid_width, grid_height,
             GridBagConstraints.NONE, GridBagConstraints.NORTHWEST, 0.0, 0.0,
             top, left, bottom, right);

}

   public static void main(String[] args) {
   Frame f = new CG("CG Drawing Board 1.0");
   f.pack();
   f.show();
   }

}