s12.htm

Java2Swingt界面设计

              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 12.3.5 JLayeredPane属性</p>
            <p>&nbsp;</p>
            <p> 12.3.6 JLayeredPane类总结</p>
            <p>&nbsp;</p>
            <p> 12.3.7 AWT兼容</p>
            <p>&nbsp;</p>
            <p> 12.4 JTablePane</p>
            <p>&nbsp;</p>
            <p align="center"><b>例12-10 JTabbedPane的一个简单实例</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import java.awt.event.*;<br>
            import javax.swing.*;
            <p>public class Test extends JApplet {<br>
              public Test() {<br>
              Container contentPane = getContentPane();<br>
              JTabbedPane tp = new JTabbedPane();<br>
              JPanel panelOne = new JPanel();<br>
              JPanel panelTwo = new JPanel();</p>
            <p> panelOne.add(new JButton(&quot;button in panel 1&quot;));<br>
              panelTwo.add(new JButton(&quot;button in panel 2&quot;));</p>
            <p> tp.add(panelOne, &quot;Panel One&quot;);<br>
              tp.addTab(&quot;Panel Two&quot;, <br>
              new ImageIcon(&quot;document.gif&quot;),<br>
              panelTwo, <br>
              &quot;tooltip text&quot;);</p>
            <p> contentPane.setLayout(new BorderLayout());<br>
              contentPane.add(tp);<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 12.4.1 选项卡的位置</p>
            <p>&nbsp;</p>
            <p> 12.4.2 JTabbedPane的属性</p>
            <p>&nbsp;</p>
            <p align="center"><b>例12-11 为JTabbedPane的实例设置选项卡放置位置</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import java.awt.event.*;<br>
            import javax.swing.*;
            <p>public class Test extends JApplet {<br>
              private JTabbedPane tp = new JTabbedPane(SwingConstants.BOTTOM);<br>
              private JComboBox combo = new JComboBox();</p>
            <p> public Test() {<br>
              Container contentPane = getContentPane();<br>
              JPanel comboPanel = new JPanel();<br>
              JPanel panelOne = new JPanel();<br>
              JPanel panelTwo = new JPanel();</p>
            <p> tp.add(panelOne, &quot;Panel One&quot;);<br>
              tp.addTab(&quot;Panel Two&quot;, <br>
              new ImageIcon(&quot;document.gif&quot;),<br>
              panelTwo, <br>
              &quot;tooltip text&quot;);</p>
            <p> combo.addItem(&quot;TOP&quot;);<br>
              combo.addItem(&quot;LEFT&quot;);<br>
              combo.addItem(&quot;RIGHT&quot;);<br>
              combo.addItem(&quot;BOTTOM&quot;);</p>
            <p> setComboValue();</p>
            <p> comboPanel.add(new JLabel(&quot;Tab Placement:&quot;));<br>
              comboPanel.add(combo);</p>
            <p> contentPane.setLayout(new BorderLayout());<br>
              contentPane.add(comboPanel, BorderLayout.NORTH);<br>
              contentPane.add(tp, BorderLayout.CENTER);</p>
            <p> combo.addItemListener(new ItemListener() {<br>
              public void itemStateChanged(ItemEvent e) {<br>
              JComboBox cb = (JComboBox)e.getSource();<br>
              int state = e.getStateChange();</p>
            <p> if(state == ItemEvent.SELECTED) {<br>
              String s = (String)cb.getSelectedItem();</p>
            <p> if(s.equals(&quot;TOP&quot;))<br>
              tp.setTabPlacement(JTabbedPane.TOP);<br>
              else if(s.equals(&quot;LEFT&quot;))<br>
              tp.setTabPlacement(JTabbedPane.LEFT);<br>
              else if(s.equals(&quot;RIGHT&quot;))<br>
              tp.setTabPlacement(JTabbedPane.RIGHT);<br>
              else if(s.equals(&quot;BOTTOM&quot;))<br>
              tp.setTabPlacement(JTabbedPane.BOTTOM);</p>
            <p> tp.validate();<br>
              }<br>
              }<br>
              });<br>
              }<br>
              private void setComboValue() {<br>
              int placement = tp.getTabPlacement();<br>
              String selectedItem = null;</p>
            <p> switch(placement) {<br>
              case JTabbedPane.TOP:<br>
              selectedItem = &quot;TOP&quot;;<br>
              break;<br>
              case JTabbedPane.LEFT:<br>
              selectedItem = &quot;LEFT&quot;;<br>
              break;<br>
              case JTabbedPane.RIGHT:<br>
              selectedItem = &quot;RIGHT&quot;;<br>
              break;<br>
              case JTabbedPane.BOTTOM:<br>
              selectedItem = &quot;BOTTOM&quot;;<br>
              break;<br>
              }<br>
              combo.setSelectedItem(selectedItem);<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 12.4.3 JTabbedPane的事件</p>
            <p>&nbsp;</p>
            <p align="center"><b>例12-12 响应JTabbedPane的变化事件</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import java.awt.event.*;<br>
            import javax.swing.*;<br>
            import javax.swing.event.*;
            <p>public class Test extends JApplet {</p>
            <p> public Test() {<br>
              Container contentPane = getContentPane();<br>
              JTabbedPane tp = new JTabbedPane();<br>
              JPanel panelOne = new JPanel();<br>
              JPanel panelTwo = new JPanel();</p>
            <p> tp.add(panelOne, &quot;Panel One&quot;);<br>
              tp.addTab(&quot;Panel Two&quot;, <br>
              new ImageIcon(&quot;document.gif&quot;),<br>
              panelTwo, <br>
              &quot;tooltip text&quot;);</p>
            <p> contentPane.setLayout(new BorderLayout());<br>
              contentPane.add(tp);</p>
            <p> tp.addChangeListener(new ChangeListener() {<br>
              public void stateChanged(ChangeEvent e) {<br>
              JTabbedPane tabbedPane = <br>
              (JTabbedPane)e.getSource();</p>
            <p> int index = tabbedPane.getSelectedIndex();<br>
              String s = tabbedPane.getTitleAt(index);</p>
            <p> showStatus(s + &quot; selected&quot;);<br>
              }<br>
              });<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 12.4.4 JTabbedPane类总结</p>
            <p>&nbsp;</p>
            <p> 12.5 JSplitPane类</p>
            <p>&nbsp;</p>
            <p align="center"><b>例12-13 运行中的JSplitPane</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import java.awt.event.*;<br>
            import javax.swing.*;
            <p>public class Test extends JApplet {<br>
              public Test() {<br>
              Container contentPane = getContentPane();<br>
              JButton left, right;<br>
              JSplitPane sp = new JSplitPane();<br>
              ControlPanel cp = new ControlPanel(sp);</p>
            <p> contentPane.setLayout(new BorderLayout());<br>
              contentPane.add(sp, BorderLayout.CENTER);<br>
              contentPane.add(cp, BorderLayout.NORTH);</p>
            <p> left = (JButton)sp.getTopComponent();<br>
              right = (JButton)sp.getBottomComponent();</p>
            <p> System.out.println(&quot;left button minimum size: &quot; + <br>
              left.getMinimumSize());<br>
              System.out.println(&quot;right button minimum size: &quot; + <br>
              right.getMinimumSize());</p>
            <p> }<br>
              }</p>
            <p>class ControlPanel extends JPanel {<br>
              private JSplitPane sp;</p>
            <p> public ControlPanel(JSplitPane splitPane) {<br>
              sp = splitPane;</p>
            <p> JComboBox dividerSize = new JComboBox();<br>
              JComboBox orientation = new JComboBox();</p>
            <p> JCheckBox continuous = new JCheckBox(<br>
              &quot;Continuous Layout&quot;);<br>
              JCheckBox oneTouch = new JCheckBox(<br>
              &quot;One Touch Expandable&quot;);</p>
            <p> Integer initialSize = new Integer(sp.getDividerSize());<br>
              dividerSize.addItem(initialSize.toString());<br>
              dividerSize.addItem(&quot;10&quot;);<br>
              dividerSize.addItem(&quot;20&quot;);<br>
              dividerSize.addItem(&quot;30&quot;);<br>
              dividerSize.addItem(&quot;40&quot;);</p>
            <p> orientation.addItem(&quot;horizontal&quot;);<br>
              orientation.addItem(&quot;vertical&quot;);</p>
            <p> int initialOrientation = sp.getOrientation();<br>
              if(initialOrientation == JSplitPane.HORIZONTAL_SPLIT)<br>
              orientation.setSelectedItem(&quot;horizontal&quot;);<br>
              else<br>
              orientation.setSelectedItem(&quot;vertical&quot;);</p>
            <p> boolean initialContinuousLayout = sp.isContinuousLayout();<br>
              if(initialContinuousLayout)<br>
              continuous.setSelected(true);</p>
            <p> add(oneTouch);<br>
              add(continuous);<br>
              add(new JLabel(&quot;Divider Size:&quot;));<br>
              add(dividerSize);<br>
              add(new JLabel(&quot;Orientation:&quot;));<br>
              add(orientation);</p>
            <p> oneTouch.addItemListener(new ItemListener() {<br>
              public void itemStateChanged(ItemEvent e) {<br>
              if(e.getStateChange() == ItemEvent.SELECTED)<br>
              sp.setOneTouchExpandable(true);<br>
              else<br>
              sp.setOneTouchExpandable(false);<br>
              }<br>
              });<br>
              continuous.addItemListener(new ItemListener() {<br>
              public void itemStateChanged(ItemEvent e) {<br>
              if(e.getStateChange() == ItemEvent.SELECTED)<br>
              sp.setContinuousLayout(true);<br>
              else<br>
              sp.setContinuousLayout(false);<br>
              }<br>
              });<br>
              dividerSize.addItemListener(new ItemListener() {<br>
              public void itemStateChanged(ItemEvent e) {<br>
              JComboBox combo = (JComboBox)e.getSource();<br>
              String s = (String)combo.getSelectedItem();</p>
            <p> sp.setDividerSize(Integer.parseInt(s));<br>
              }<br>
              });<br>
              orientation.addItemListener(new ItemListener() {<br>
              public void itemStateChanged(ItemEvent e) {<br>
              JComboBox combo = (JComboBox)e.getSource();<br>
              String s = (String)combo.getSelectedItem();</p>
            <p> if(s.equals(&quot;horizontal&quot;))<br>
              sp.setOrientation(<br>
              JSplitPane.HORIZONTAL_SPLIT);<br>
              else<br>
              sp.setOrientation(JSplitPane.VERTICAL_SPLIT);<br>
              }<br>
              });<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 12.5.1 JSplitPane属性</p>
            <p>&nbsp;</p>
            <p> 12.5.2 JSplitPane事件</p>
            <p>&nbsp;</p>
            <p align="center"><b>例12-14 监视一个拆分窗格的分隔体的位置</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import java.awt.event.*;<br>
            import java.beans.*;<br>
            import javax.swing.*;
            <p>public class Test extends JApplet {<br>
              public Test() {<br>
              Container contentPane = getContentPane();<br>
              JSplitPane sp = new JSplitPane();</p>
            <p> contentPane.add(sp, BorderLayout.CENTER);<br>
              sp.addPropertyChangeListener(<br>
              new PropertyChangeListener() {<br>
              public void propertyChange(PropertyChangeEvent e) {<br>
              if(e.getPropertyName().equals(<br>
              JSplitPane.LAST_DIVIDER_LOCATION_PROPERTY)) {<br>
              JSplitPane jsp = (JSplitPane)e.getSource();</p>
            <p> int dl = jsp.getDividerLocation();</p>
            <p> JButton lb = (JButton)jsp.getLeftComponent();<br>
              JButton rb = (JButton)jsp.getRightComponent();</p>
            <p> showStatus(&quot;Divider Location: &quot; + dl + &quot; / &quot; 
              +<br>
              lb.getText() + &quot;: &quot; + lb.getSize() + &quot; / &quot; +<br>
              rb.getText() + &quot;: &quot; + rb.getSize()); <br>
              }<br>
              }<br>
              });<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 12.5.3 JSplitPane类总结</p>
            <p>&nbsp;</p>
            <p> 12.5.4 AWT兼容</p>
            <p>&nbsp;</p>
            <p> 12.6 本章回顾</p>
            <p>&nbsp;</p>
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