corejava第10版

corejava第10版/v1ch12/optionDialog/OptionDialogFrame.java

@@ -0,0 +1,156 @@
+package optionDialog;
+
+import java.awt.*;
+import java.awt.event.*;
+import java.awt.geom.*;
+import java.util.*;
+import javax.swing.*;
+
+/**
+ * A frame that contains settings for selecting various option dialogs.
+ */
+public class OptionDialogFrame extends JFrame
+{
+   private ButtonPanel typePanel;
+   private ButtonPanel messagePanel;
+   private ButtonPanel messageTypePanel;
+   private ButtonPanel optionTypePanel;
+   private ButtonPanel optionsPanel;
+   private ButtonPanel inputPanel;
+   private String messageString = "Message";
+   private Icon messageIcon = new ImageIcon("blue-ball.gif");
+   private Object messageObject = new Date();
+   private Component messageComponent = new SampleComponent();
+
+   public OptionDialogFrame()
+   {
+      JPanel gridPanel = new JPanel();
+      gridPanel.setLayout(new GridLayout(2, 3));
+
+      typePanel = new ButtonPanel("Type", "Message", "Confirm", "Option", "Input");
+      messageTypePanel = new ButtonPanel("Message Type", "ERROR_MESSAGE", "INFORMATION_MESSAGE",
+            "WARNING_MESSAGE", "QUESTION_MESSAGE", "PLAIN_MESSAGE");
+      messagePanel = new ButtonPanel("Message", "String", "Icon", "Component", "Other", 
+            "Object[]");
+      optionTypePanel = new ButtonPanel("Confirm", "DEFAULT_OPTION", "YES_NO_OPTION",
+            "YES_NO_CANCEL_OPTION", "OK_CANCEL_OPTION");
+      optionsPanel = new ButtonPanel("Option", "String[]", "Icon[]", "Object[]");
+      inputPanel = new ButtonPanel("Input", "Text field", "Combo box");
+
+      gridPanel.add(typePanel);
+      gridPanel.add(messageTypePanel);
+      gridPanel.add(messagePanel);
+      gridPanel.add(optionTypePanel);
+      gridPanel.add(optionsPanel);
+      gridPanel.add(inputPanel);
+
+      // add a panel with a Show button
+
+      JPanel showPanel = new JPanel();
+      JButton showButton = new JButton("Show");
+      showButton.addActionListener(new ShowAction());
+      showPanel.add(showButton);
+
+      add(gridPanel, BorderLayout.CENTER);
+      add(showPanel, BorderLayout.SOUTH);
+      pack();
+   }
+
+   /**
+    * Gets the currently selected message.
+    * @return a string, icon, component, or object array, depending on the Message panel selection
+    */
+   public Object getMessage()
+   {
+      String s = messagePanel.getSelection();
+      if (s.equals("String")) return messageString;
+      else if (s.equals("Icon")) return messageIcon;
+      else if (s.equals("Component")) return messageComponent;
+      else if (s.equals("Object[]")) return new Object[] { messageString, messageIcon,
+            messageComponent, messageObject };
+      else if (s.equals("Other")) return messageObject;
+      else return null;
+   }
+
+   /**
+    * Gets the currently selected options.
+    * @return an array of strings, icons, or objects, depending on the Option panel selection
+    */
+   public Object[] getOptions()
+   {
+      String s = optionsPanel.getSelection();
+      if (s.equals("String[]")) return new String[] { "Yellow", "Blue", "Red" };
+      else if (s.equals("Icon[]")) return new Icon[] { new ImageIcon("yellow-ball.gif"),
+            new ImageIcon("blue-ball.gif"), new ImageIcon("red-ball.gif") };
+      else if (s.equals("Object[]")) return new Object[] { messageString, messageIcon,
+            messageComponent, messageObject };
+      else return null;
+   }
+
+   /**
+    * Gets the selected message or option type
+    * @param panel the Message Type or Confirm panel
+    * @return the selected XXX_MESSAGE or XXX_OPTION constant from the JOptionPane class
+    */
+   public int getType(ButtonPanel panel)
+   {
+      String s = panel.getSelection();
+      try
+      {
+         return JOptionPane.class.getField(s).getInt(null);
+      }
+      catch (Exception e)
+      {
+         return -1;
+      }
+   }
+
+   /**
+    * The action listener for the Show button shows a Confirm, Input, Message, or Option dialog
+    * depending on the Type panel selection.
+    */
+   private class ShowAction implements ActionListener
+   {
+      public void actionPerformed(ActionEvent event)
+      {
+         if (typePanel.getSelection().equals("Confirm")) JOptionPane.showConfirmDialog(
+               OptionDialogFrame.this, getMessage(), "Title", getType(optionTypePanel),
+               getType(messageTypePanel));
+         else if (typePanel.getSelection().equals("Input"))
+         {
+            if (inputPanel.getSelection().equals("Text field")) JOptionPane.showInputDialog(
+                  OptionDialogFrame.this, getMessage(), "Title", getType(messageTypePanel));
+            else JOptionPane.showInputDialog(OptionDialogFrame.this, getMessage(), "Title",
+                  getType(messageTypePanel), null, new String[] { "Yellow", "Blue", "Red" },
+                  "Blue");
+         }
+         else if (typePanel.getSelection().equals("Message")) JOptionPane.showMessageDialog(
+               OptionDialogFrame.this, getMessage(), "Title", getType(messageTypePanel));
+         else if (typePanel.getSelection().equals("Option")) JOptionPane.showOptionDialog(
+               OptionDialogFrame.this, getMessage(), "Title", getType(optionTypePanel),
+               getType(messageTypePanel), null, getOptions(), getOptions()[0]);
+      }
+   }
+}
+
+/**
+ * A component with a painted surface
+ */
+
+class SampleComponent extends JComponent
+{
+   public void paintComponent(Graphics g)
+   {
+      Graphics2D g2 = (Graphics2D) g;
+      Rectangle2D rect = new Rectangle2D.Double(0, 0, getWidth() - 1, getHeight() - 1);
+      g2.setPaint(Color.YELLOW);
+      g2.fill(rect);
+      g2.setPaint(Color.BLUE);
+      g2.draw(rect);
+   }
+
+   public Dimension getPreferredSize()
+   {
+      return new Dimension(10, 10);
+   }
+}