cherry/color/button/java/ColorButton.java

｜INDEX｜ Java.use(better)

  1: //..+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
  2: package cherry.color;
  3: 
  4: import java.awt.*;
  5: import java.awt.event.*;
  6: import java.util.*;
  7: import javax.swing.*;
  8: 
  9: // ----------------------------------------
 10: public class ColorButton extends JPanel {
 11:   Map colorMap;
 12:   private JPanel canvasPane = new JPanel();
 13: 
 14:   // ----------------------------------------
 15:   public ColorButton() {
 16:     this.init();
 17:     this.initComponent();
 18:   }
 19: 
 20:   private void init() {
 21:     this.colorMap = this.new_colorMap();
 22:     this.colorMap.put("red",   Color.red  );
 23:     this.colorMap.put("green", Color.green);
 24:     this.colorMap.put("blue",  Color.blue );
 25:     this.canvasPane.setPreferredSize(new Dimension(100,100));
 26:   }
 27: 
 28:   private Map new_colorMap() {
 29:     String[] colorNames = {"red","green","blue"};
 30:     final java.util.List colorList = new ArrayList();
 31:     for (String e: colorNames) {
 32:       colorList.add(e);
 33:     }
 34:     Comparator sorter = new Comparator() {
 35:       public int compare(String s1, String s2) {
 36:         return colorList.indexOf(s1) - colorList.indexOf(s2);
 37:       };
 38:     };
 39:     return new TreeMap(sorter);
 40:   }
 41: 
 42:   private void initComponent() {
 43:     JPanel controlPane = new JPanel(new GridLayout(0,1));
 44:     controlPane.setPreferredSize(new Dimension(150,100));
 45: 
 46:     //------------------------------ Command::Client
 47:     for (String e: colorMap.keySet()) {
 48:       CommandButton button = new CommandButton(e);
 49:       button.setCommand(new ColorCommand(this, e));
 50:       controlPane.add(button);
 51:     }
 52: 
 53:     JSplitPane splitPane = new JSplitPane(
 54:       JSplitPane.HORIZONTAL_SPLIT,
 55:       controlPane,
 56:       this.canvasPane);
 57:     splitPane.setDividerLocation(100);
 58:     this.add(splitPane);
 59:   }
 60: 
 61:   //------------------------------ Command::Receiver
 62:   public void update(String command) {
 63:     this.canvasPane.setBackground(this.colorMap.get(command));
 64:   }
 65: 
 66:   // ----------------------------------------
 67:   static void tips() {
 68:     JFrame frame = new JFrame("ColorButton");
 69:     frame.setLocationRelativeTo(null);
 70:     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 71: 
 72:     JPanel panel = new ColorButton();
 73:     frame.getContentPane().add(panel);
 74: 
 75:     frame.pack();
 76:     frame.setVisible(true);
 77:   }
 78: 
 79:   //------------------------------
 80: //  private ColorButton() {}
 81:   static String version = new ColorButton()
 82:     .getClass().getName()+": #1.0.19";
 83: }
 84: 
 85: // ----------------------------------------
 86: class CommandButton extends JButton
 87:   implements CommandHolder, ActionListener {
 88: 
 89:   private Command command;
 90: 
 91:   //------------------------------
 92:   public CommandButton(String name) {
 93:     super(name);
 94:     this.addActionListener(this);
 95:   }
 96: 
 97:   public void setCommand(Command command) {
 98:     this.command = command;
 99:   }
100: 
101:   public Command getCommand() {
102:     return this.command;
103:   }
104: 
105:   //------------------------------ Command::Invoker
106:   public void actionPerformed(ActionEvent e) {
107:     this.getCommand().execute();
108:   }
109: }
110: 
111: // ----------------------------------------
112: class ColorCommand implements Command {
113:   ColorButton receiver;
114:   String name;
115: 
116:   //------------------------------
117:   public ColorCommand(ColorButton receiver, String name) {
118:     this.receiver = receiver;
119:     this.name = name;
120:   }
121: 
122:   //------------------------------ Command::ConcreteCommand
123:   public void execute() {
124:     this.receiver.update(this.name);
125:   }
126: }
127: 
128: // ========================================
129: /*'****************************************'
130:   public void actionPerformed(ActionEvent e) {
131:     String command = e.getActionCommand();
132:     Color color = null;
133:     if (command.equals("red")  ) color = Color.red;
134:     if (command.equals("green")) color = Color.green;
135:     if (command.equals("blue") ) color = Color.blue;
136:     this.canvasPane.setBackground(color);
137:   }
138:   public void actionPerformed(ActionEvent e) {
139:     String command = e.getActionCommand();
140:     this.canvasPane.setBackground(this.colorMap.get(command));
141:   }
142: '****************************************'*/