splitpanedemo.java

带滚动条的窗口显示代码.虽然简单但是很实用.适合初学者

/* 
  * @(#)SplitPaneDemo.java	1.3 99/07/23 
  * 
  * Copyright (c) 1997-1999 by Sun Microsystems, Inc. All Rights Reserved. 
  *  
  * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use, 
  * modify and redistribute this software in source and binary code form, 
  * provided that i) this copyright notice and license appear on all copies of 
  * the software; and ii) Licensee does not utilize the software in a manner 
  * which is disparaging to Sun. 
  *  
  * This software is provided "AS IS," without a warranty of any kind. ALL 
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY 
  * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR 
  * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE 
  * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING 
  * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS 
  * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, 
  * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER 
  * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF 
  * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE 
  * POSSIBILITY OF SUCH DAMAGES. 
  *  
  * This software is not designed or intended for use in on-line control of 
  * aircraft, air traffic, aircraft navigation or aircraft communications; or in 
  * the design, construction, operation or maintenance of any nuclear 
  * facility. Licensee represents and warrants that it will not use or 
  * redistribute the Software for such purposes. 
  */ 
  
  
 import javax.swing.*; 
 import javax.swing.event.*; 
 import javax.swing.text.*; 
 import javax.swing.table.*; 
 import javax.swing.border.*; 
 import javax.swing.colorchooser.*; 
 import javax.swing.filechooser.*; 
 import javax.accessibility.*; 
  
 import java.awt.*; 
 import java.awt.event.*; 
 import java.beans.*; 
 import java.util.*; 
 import java.io.*; 
 import java.applet.*; 
 import java.net.*; 
  
 /** 
  * Split Pane demo 
  * 
  * @version 1.3 07/23/99 
  * @author Scott Violet 
  * @author Jeff Dinkins 
  */ 
 public class SplitPaneDemo extends DemoModule { 
  
     JSplitPane splitPane = null; 
     JLabel earth = null; 
     JLabel moon = null; 
      
     /** 
      * main method allows us to run as a standalone demo. 
      */ 
     public static void main(String[] args) { 
 	SplitPaneDemo demo = new SplitPaneDemo(null); 
 	demo.mainImpl(); 
     } 
      
     /** 
      * SplitPaneDemo Constructor 
      */ 
     public SplitPaneDemo(SwingSet2 swingset) { 
 	super(swingset, "SplitPaneDemo", "toolbar/JSplitPane.gif"); 
  
 	earth = new JLabel(createImageIcon("splitpane/earth.jpg", getString("SplitPaneDemo.earth"))); 
 	earth.setMinimumSize(new Dimension(20, 20)); 
  
 	moon = new JLabel(createImageIcon("splitpane/moon.jpg", getString("SplitPaneDemo.moon"))); 
 	moon.setMinimumSize(new Dimension(20, 20)); 
 	 
         splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, earth, moon); 
         splitPane.setContinuousLayout(true); 
 	splitPane.setOneTouchExpandable(true); 
  
         splitPane.setDividerLocation(200); 
  
 	getDemoPanel().add(splitPane, BorderLayout.CENTER); 
 	getDemoPanel().setBackground(Color.black); 
  
 	getDemoPanel().add(createSplitPaneControls(), BorderLayout.SOUTH); 
     } 
      
     /** 
      * Creates controls to alter the JSplitPane. 
      */ 
     protected JPanel createSplitPaneControls() { 
         JPanel wrapper = new JPanel(); 
         ButtonGroup group = new ButtonGroup(); 
         JRadioButton button; 
  
         Box buttonWrapper = new Box(BoxLayout.X_AXIS); 
 	 
         wrapper.setLayout(new GridLayout(0, 1)); 
 	 
         /* Create a radio button to vertically split the split pane. */ 
         button = new JRadioButton(getString("SplitPaneDemo.vert_split")); 
         button.setMnemonic(getMnemonic("SplitPaneDemo.vert_split")); 
         button.addActionListener(new ActionListener() { 
             public void actionPerformed(ActionEvent e) { 
                 splitPane.setOrientation(JSplitPane.VERTICAL_SPLIT); 
             } 
         }); 
         group.add(button); 
         buttonWrapper.add(button); 
  
         /* Create a radio button the horizontally split the split pane. */ 
         button = new JRadioButton(getString("SplitPaneDemo.horz_split")); 
         button.setMnemonic(getMnemonic("SplitPaneDemo.horz_split")); 
         button.setSelected(true); 
         button.addActionListener(new ActionListener() { 
             public void actionPerformed(ActionEvent e) { 
                 splitPane.setOrientation(JSplitPane.HORIZONTAL_SPLIT); 
             } 
         }); 
         group.add(button); 
         buttonWrapper.add(button); 
 	 
         /* Create a check box as to whether or not the split pane continually 
            lays out the component when dragging. */ 
         JCheckBox checkBox = new JCheckBox(getString("SplitPaneDemo.cont_layout")); 
         checkBox.setMnemonic(getMnemonic("SplitPaneDemo.cont_layout")); 
         checkBox.setSelected(true); 
 	 
         checkBox.addChangeListener(new ChangeListener() { 
             public void stateChanged(ChangeEvent e) { 
                 splitPane.setContinuousLayout( 
 		    ((JCheckBox)e.getSource()).isSelected()); 
             } 
         }); 
         buttonWrapper.add(checkBox); 
 	 
         /* Create a check box as to whether or not the split pane divider 
            contains the oneTouchExpandable buttons. */ 
         checkBox = new JCheckBox(getString("SplitPaneDemo.one_touch_expandable")); 
         checkBox.setMnemonic(getMnemonic("SplitPaneDemo.one_touch_expandable")); 
         checkBox.setSelected(true); 
 	 
         checkBox.addChangeListener(new ChangeListener() { 
             public void stateChanged(ChangeEvent e) { 
                 splitPane.setOneTouchExpandable( 
 		    ((JCheckBox) e.getSource()).isSelected()); 
 	    } 
 	}); 
 	buttonWrapper.add(checkBox); 
 	wrapper.add(buttonWrapper); 
 	 
 	/* Create a text field to change the divider size. */ 
 	JPanel                   tfWrapper; 
 	JTextField               tf; 
 	JLabel                   label; 
 	 
 	tf = new JTextField(); 
 	tf.setText(new Integer(splitPane.getDividerSize()).toString()); 
 	tf.setColumns(5); 
 	tf.getAccessibleContext().setAccessibleName(getString("SplitPaneDemo.divider_size")); 
 	tf.addActionListener(new ActionListener() { 
 	    public void actionPerformed(ActionEvent e) { 
 		String  value = ((JTextField)e.getSource()).getText(); 
 		int newSize; 
 		 
 		try { 
 		    newSize = Integer.parseInt(value); 
 		} catch (Exception ex) { 
 		    newSize = -1; 
 		} 
 		if(newSize > 0) { 
 		    splitPane.setDividerSize(newSize); 
 		} else { 
 		    JOptionPane.showMessageDialog(splitPane, 
 						  getString("SplitPaneDemo.invalid_divider_size"), 
 						  getString("SplitPaneDemo.error"), 
 						  JOptionPane.ERROR_MESSAGE); 
 		} 
 	    } 
 	}); 
 	label = new JLabel(getString("SplitPaneDemo.divider_size")); 
 	tfWrapper = new JPanel(new FlowLayout(FlowLayout.LEFT)); 
 	tfWrapper.add(label); 
 	tfWrapper.add(tf); 
 	label.setLabelFor(tf); 
 	label.setDisplayedMnemonic(getMnemonic("SplitPaneDemo.divider_size")); 
 	wrapper.add(tfWrapper); 
 	 
 	/* Create a text field that will change the preferred/minimum size 
 	   of the earth component. */ 
 	tf = new JTextField(String.valueOf(earth.getMinimumSize().width)); 
 	tf.setColumns(5); 
 	tf.getAccessibleContext().setAccessibleName(getString("SplitPaneDemo.first_component_min_size")); 
 	tf.addActionListener(new ActionListener() { 
 	    public void actionPerformed(ActionEvent e) { 
 		String           value = ((JTextField)e.getSource()).getText(); 
 		int              newSize; 
 		 
 		try { 
 		    newSize = Integer.parseInt(value); 
 		} catch (Exception ex) { 
 		    newSize = -1; 
 		} 
 		if(newSize > 10) { 
 		    earth.setMinimumSize(new Dimension(newSize, newSize)); 
 		} else { 
 		    JOptionPane.showMessageDialog(splitPane, 
 						  getString("SplitPaneDemo.invalid_min_size") + 
 						  getString("SplitPaneDemo.must_be_greater_than") + 10, 
 						  getString("SplitPaneDemo.error"), 
 						  JOptionPane.ERROR_MESSAGE); 
 		} 
 	    } 
 	}); 
 	label = new JLabel(getString("SplitPaneDemo.first_component_min_size")); 
 	tfWrapper = new JPanel(new FlowLayout(FlowLayout.LEFT)); 
 	tfWrapper.add(label); 
 	tfWrapper.add(tf); 
 	label.setLabelFor(tf); 
 	label.setDisplayedMnemonic(getMnemonic("SplitPaneDemo.first_component_min_size")); 
 	wrapper.add(tfWrapper); 
 	 
 	/* Create a text field that will change the preferred/minimum size 
 	   of the moon component. */ 
 	tf = new JTextField(String.valueOf(moon.getMinimumSize().width)); 
 	tf.setColumns(5); 
 	tf.getAccessibleContext().setAccessibleName(getString("SplitPaneDemo.second_component_min_size")); 
 	tf.addActionListener(new ActionListener() { 
 	    public void actionPerformed(ActionEvent e) { 
 		String           value = ((JTextField)e.getSource()).getText(); 
 		int              newSize; 
 		 
 		try { 
 		    newSize = Integer.parseInt(value); 
 		} catch (Exception ex) { 
 		    newSize = -1; 
 		} 
 		if(newSize > 10) { 
 		    moon.setMinimumSize(new Dimension(newSize, newSize)); 
 		} else { 
 		    JOptionPane.showMessageDialog(splitPane, 
 						  getString("SplitPaneDemo.invalid_min_size") + 
 						  getString("SplitPaneDemo.must_be_greater_than") + 10, 
 						  getString("SplitPaneDemo.error"), 
 						  JOptionPane.ERROR_MESSAGE); 
 		} 
 	    } 
 	}); 
 	label = new JLabel(getString("SplitPaneDemo.second_component_min_size")); 
 	tfWrapper = new JPanel(new FlowLayout(FlowLayout.LEFT)); 
 	tfWrapper.add(label); 
 	tfWrapper.add(tf); 
 	label.setLabelFor(tf); 
 	label.setDisplayedMnemonic(getMnemonic("SplitPaneDemo.second_component_min_size")); 
 	wrapper.add(tfWrapper); 
 	 
 	return wrapper; 
     } 
      
 }