s07.htm

java图形设计卷2 swing

            import java.util.*;
            <p>public class Test extends JApplet {<br>
              JDesktopPane desktopPane = new JDesktopPane();</p>
            <p> JInternalFrame jif = new JInternalFrame(<br>
              &quot;Internal Frame &quot;, // title<br>
              true, // resizable<br>
              true, // closable<br>
              true, // maximizable<br>
              true); // iconifiable</p>
            <p> JScrollBar scrollbar = new JScrollBar();<br>
              JSlider slider = new JSlider();<br>
              JToolBar toolbar = new JToolBar();<br>
              JTree tree = new JTree();</p>
            <p> public void init() {<br>
              Container contentPane = getContentPane();</p>
            <p><br>
              jif.setPreferredSize(new Dimension(550, 450));<br>
              jif.getContentPane().setLayout(new FlowLayout());<br>
              jif.getContentPane().add(new ComponentPanel());</p>
            <p> desktopPane.setLayout(new FlowLayout());<br>
              desktopPane.add(jif);</p>
            <p> contentPane.add(new ControlPanel(), BorderLayout.NORTH);<br>
              contentPane.add(desktopPane, BorderLayout.CENTER);</p>
            <p> }<br>
              class ComponentPanel extends JPanel {<br>
              public ComponentPanel() {<br>
              JPanel panel = new JPanel();</p>
            <p> setLayout(new BorderLayout());<br>
              add(toolbar, BorderLayout.NORTH);<br>
              add(panel, BorderLayout.CENTER);</p>
            <p> panel.add(scrollbar);<br>
              panel.add(slider);<br>
              panel.add(new JScrollPane(tree));</p>
            <p> tree.setPreferredSize(new Dimension(200,100));</p>
            <p> toolbar.add(new JButton(&quot;button&quot;));<br>
              }<br>
              }<br>
              class ControlPanel extends JPanel {<br>
              JCheckBox rollover = new JCheckBox(<br>
              &quot;JToolBar.rollover&quot;);<br>
              JCheckBox palette = new JCheckBox(<br>
              &quot;JInternalFrame.palette&quot;);<br>
              JCheckBox filled = new JCheckBox(<br>
              &quot;JSlider.isFilled&quot;);<br>
              JCheckBox freeStanding = new JCheckBox(<br>
              &quot; JScrollBar.freeStanding&quot;);</p>
            <p> JRadioButton none = new JRadioButton(&quot;none&quot;);<br>
              JRadioButton horizontal = new JRadioButton(&quot;horizontal&quot;);<br>
              JRadioButton angled = new JRadioButton(&quot;angled&quot;);</p>
            <p> public ControlPanel() {<br>
              ActionListener checkBoxListener = <br>
              new CheckBoxListener();<br>
              ActionListener radioButtonListener = <br>
              new RadioButtonListener();</p>
            <p> palette.addActionListener(checkBoxListener);<br>
              filled.addActionListener(checkBoxListener);<br>
              rollover.addActionListener(checkBoxListener);<br>
              freeStanding.addActionListener(checkBoxListener);</p>
            <p> none.addActionListener(radioButtonListener);<br>
              horizontal.addActionListener(radioButtonListener);<br>
              angled.addActionListener(radioButtonListener);</p>
            <p> ButtonGroup group = new ButtonGroup();<br>
              group.add(none);<br>
              group.add(horizontal);<br>
              group.add(filled);</p>
            <p> none.setSelected(true);<br>
              freeStanding.setSelected(true);<br>
              <br>
              add(palette);<br>
              add(filled);<br>
              add(rollover);<br>
              add(freeStanding);<br>
              add(Box.createHorizontalStrut(10));<br>
              add(new JLabel(&quot;Tree: &quot;));<br>
              add(none);<br>
              add(horizontal);<br>
              add(angled);<br>
              }<br>
              class RadioButtonListener implements ActionListener {<br>
              public void actionPerformed(ActionEvent e) {<br>
              JRadioButton rb = (JRadioButton)e.getSource();</p>
            <p> if(rb == none) {<br>
              tree.putClientProperty(<br>
              &quot;JTree.lineStyle&quot;, &quot;None&quot;);<br>
              }<br>
              if(rb == horizontal) {<br>
              tree.putClientProperty(<br>
              &quot;JTree.lineStyle&quot;, &quot;Horizontal&quot;);<br>
              }<br>
              if(rb == angled) {<br>
              tree.putClientProperty(<br>
              &quot;JTree.lineStyle&quot;, &quot;Angled&quot;);<br>
              }<br>
              tree.repaint();<br>
              }<br>
              }<br>
              class CheckBoxListener implements ActionListener {<br>
              public void actionPerformed(ActionEvent e) {<br>
              JCheckBox cb = (JCheckBox)e.getSource();</p>
            <p> if(cb == palette) {<br>
              palette.putClientProperty(<br>
              &quot;JInternalFrame.isPalette&quot;, <br>
              new Boolean(cb.isSelected()));</p>
            <p> jif.revalidate();<br>
              }<br>
              else if(cb == filled) {<br>
              slider.putClientProperty(<br>
              &quot;JSlider.isFilled&quot;, <br>
              new Boolean(cb.isSelected()));</p>
            <p> slider.repaint();<br>
              }<br>
              else if(cb == rollover) {<br>
              toolbar.putClientProperty(<br>
              &quot;JToolBar.isRollover&quot;, <br>
              new Boolean(cb.isSelected()));</p>
            <p> toolbar.repaint();<br>
              }<br>
              else if(cb == freeStanding) {<br>
              scrollbar.putClientProperty(<br>
              &quot;JScrollBar.isFreeStanding&quot;, <br>
              new Boolean(cb.isSelected()));</p>
            <p> scrollbar.repaint();<br>
              }<br>
              }<br>
              }<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p> 7.2.1 客户属性</p>
            <p>&nbsp;</p>
            <p> 7.2.2 主题</p>
            <p align="center"><b>例7-6 一个简单的定制主题</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import javax.swing.*;<br>
            import javax.swing.plaf.*;<br>
            import javax.swing.plaf.metal.*;<br>
            import javax.swing.plaf.*;
            <p>public class Test extends JApplet {<br>
              public void init() {<br>
              Container contentPane = getContentPane();</p>
            <p> contentPane.setLayout(new FlowLayout());</p>
            <p> setMetalTheme(new ExperimentalTheme());</p>
            <p> contentPane.add(new JButton(&quot;button&quot;));<br>
              contentPane.add(new JCheckBox(&quot;check me&quot;));<br>
              }<br>
              private void setMetalTheme(MetalTheme theme) {<br>
              MetalLookAndFeel.setCurrentTheme(new ExperimentalTheme());</p>
            <p> // Metal Look and Feel must be (re)loaded for the<br>
              // new theme to take effect ...</p>
            <p> try {<br>
              UIManager.setLookAndFeel(<br>
              &quot;javax.swing.plaf.metal.MetalLookAndFeel&quot;);<br>
              }<br>
              catch(IllegalAccessException e1) {}<br>
              catch(UnsupportedLookAndFeelException e2) {}<br>
              catch(InstantiationException e3) {}<br>
              catch(ClassNotFoundException e4) {}<br>
              }<br>
              }<br>
              class ExperimentalTheme extends DefaultMetalTheme {<br>
              public FontUIResource getControlTextFont() { <br>
              return new FontUIResource(&quot;SanSerif&quot;, <br>
              Font.BOLD + Font.ITALIC, 24);<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p>&nbsp;</p>
            <p align="center"><b>例7-7 安装一个附加界面样式</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import javax.swing.*;
            <p>public class Test extends JApplet {<br>
              public void init() {<br>
              UIManager.addAuxiliaryLookAndFeel( <br>
              new ExampleAuxiliaryLookAndFeel());</p>
            <p> Container contentPane = getContentPane();<br>
              JButton button = new JButton(&quot;button&quot;);</p>
            <p> contentPane.setLayout(new FlowLayout());<br>
              contentPane.add(button);<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p align="center"><b>例7-8 附加界面样式的例子</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import javax.swing.*;
            <p>public class ExampleAuxiliaryLookAndFeel extends LookAndFeel {<br>
              public String getDescription(){<br>
              return &quot;example auxiliary look and feel&quot;;<br>
              }<br>
              public String getID() {<br>
              return &quot;example&quot;;<br>
              }<br>
              public String getName() {<br>
              return &quot;example auxiliary&quot;; <br>
              }<br>
              public boolean isNativeLookAndFeel() {<br>
              return false;<br>
              }<br>
              public boolean isSupportedLookAndFeel() {<br>
              return true;<br>
              }<br>
              public UIDefaults getDefaults() {<br>
              UIDefaults table = new UIDefaults();</p>
            <p> Object[] uiDefaults = {<br>
              &quot;ButtonUI&quot;, &quot;AuxiliaryButtonUI&quot;<br>
              };</p>
            <p> table.putDefaults(uiDefaults);<br>
              return table;<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p align="center"><b>例7-9 一个附加UI</b></p>
            <hr noshade size="1">
            import java.awt.*;<br>
            import java.awt.event.*;<br>
            import javax.accessibility.*;<br>
            import javax.swing.*;<br>
            import javax.swing.plaf.*;
            <p>public class AuxiliaryButtonUI extends ComponentUI {<br>
              private static ComponentUI cui = new AuxiliaryButtonUI();<br>
              private static AuxiliaryButtonMouseListener ml = <br>
              new AuxiliaryButtonMouseListener();</p>
            <p> // must be implemented<br>
              public static ComponentUI createUI(JComponent c) {<br>
              return cui;<br>
              }<br>
              public void installUI(JComponent c) {<br>
              c.addMouseListener(ml);<br>
              }<br>
              public void uninstallUI(JComponent c) {<br>
              c.removeMouseListener(ml);<br>
              }<br>
              public void update(Graphics g, JComponent c) {<br>
              // don't want ComponentUI default behavior, which is<br>
              // to clear the background<br>
              }<br>
              }<br>
              class AuxiliaryButtonMouseListener extends MouseAdapter {<br>
              public void mouseEntered(MouseEvent e) {<br>
              JComponent c = (JComponent)e.getSource();<br>
              AccessibleContext ac = c.getAccessibleContext();<br>
              String role = ac.getAccessibleRole().toString();<br>
              String name = ac.getAccessibleName();</p>
            <p> System.out.println(&quot;mouse entered component of type &quot; 
              +<br>
              role + &quot; named &quot; + name);<br>
              }<br>
              }</p>
            <hr size="1" noshade>
            <p>&nbsp;</p>
            <p>&nbsp;</p>
            <p> 7.3 附加UI</p>
            <p>&nbsp;</p>
            <p> 7.4 本章回顾</p>
            <p>&nbsp;</p>
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