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Java by API/javax.swing/BoundedRangeModel - История изменений
2026-04-19T13:19:25Z
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в 17:43, 31 мая 2010
2010-05-31T17:43:48Z
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http://www.jexp.ru/index.php?title=Java_by_API/javax.swing/BoundedRangeModel&diff=779&oldid=prev
Admin: 1 версия
2010-05-31T14:21:09Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== BoundedRangeModel: addChangeListener(ChangeListener x) ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
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import java.awt.BorderLayout;<br />
import javax.swing.BoundedRangeModel;<br />
import javax.swing.JFrame;<br />
import javax.swing.JProgressBar;<br />
import javax.swing.JScrollBar;<br />
import javax.swing.JSlider;<br />
import javax.swing.event.ChangeEvent;<br />
import javax.swing.event.ChangeListener;<br />
public class MainClass {<br />
public static void main(String args[]) throws Exception {<br />
ChangeListener changeListener = new BoundedChangeListener();<br />
JScrollBar anotherJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);<br />
BoundedRangeModel model = anotherJScrollBar.getModel();<br />
model.addChangeListener(changeListener);<br />
JFrame frame = new JFrame("ScrollBars R Us");<br />
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<br />
frame.add(anotherJScrollBar, BorderLayout.NORTH);<br />
frame.setSize(300, 200);<br />
frame.setVisible(true);<br />
}<br />
}<br />
class BoundedChangeListener implements ChangeListener {<br />
public void stateChanged(ChangeEvent changeEvent) {<br />
Object source = changeEvent.getSource();<br />
if (source instanceof BoundedRangeModel) {<br />
BoundedRangeModel aModel = (BoundedRangeModel) source;<br />
if (!aModel.getValueIsAdjusting()) {<br />
System.out.println("Changed: " + aModel.getValue());<br />
}<br />
} else if (source instanceof JSlider) {<br />
JSlider theJSlider = (JSlider) source;<br />
if (!theJSlider.getValueIsAdjusting()) {<br />
System.out.println("Slider changed: " + theJSlider.getValue());<br />
}<br />
} else if (source instanceof JProgressBar) {<br />
JProgressBar theJProgressBar = (JProgressBar) source;<br />
System.out.println("ProgressBar changed: " + theJProgressBar.getValue());<br />
} else {<br />
System.out.println("Something changed: " + source);<br />
}<br />
}<br />
}<br />
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</source><br />
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<!-- end source code --><br />
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== BoundedRangeModel: getExtent() ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
import java.awt.BorderLayout;<br />
import java.awt.event.ActionEvent;<br />
import java.awt.event.ActionListener;<br />
import javax.swing.BoundedRangeModel;<br />
import javax.swing.JButton;<br />
import javax.swing.JFrame;<br />
import javax.swing.JPanel;<br />
import javax.swing.JTextField;<br />
public class MainClass {<br />
public static void main(final String args[]) {<br />
JFrame frame = new JFrame("Offset Example");<br />
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<br />
JPanel panel = new JPanel(new BorderLayout());<br />
final JTextField textField = new JTextField();<br />
panel.add(textField, BorderLayout.CENTER);<br />
frame.add(panel, BorderLayout.NORTH);<br />
JButton button = new JButton("Get Offset");<br />
ActionListener actionListener = new ActionListener() {<br />
public void actionPerformed(ActionEvent actionEvent) {<br />
System.out.println("Offset: " + textField.getScrollOffset());<br />
System.out.println("Visibility: " + textField.getHorizontalVisibility());<br />
BoundedRangeModel model = textField.getHorizontalVisibility();<br />
int extent = model.getExtent();<br />
textField.setScrollOffset(extent);<br />
}<br />
};<br />
button.addActionListener(actionListener);<br />
frame.add(button, BorderLayout.SOUTH);<br />
frame.setSize(250, 150);<br />
frame.setVisible(true);<br />
}<br />
}<br />
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</source><br />
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<!-- end source code --><br />
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== BoundedRangeModel: getValue() ==<br />
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<!-- start source code --><br />
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<source lang="java"><br />
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import java.awt.BorderLayout;<br />
import javax.swing.BoundedRangeModel;<br />
import javax.swing.JFrame;<br />
import javax.swing.JProgressBar;<br />
import javax.swing.JScrollBar;<br />
import javax.swing.JSlider;<br />
import javax.swing.event.ChangeEvent;<br />
import javax.swing.event.ChangeListener;<br />
public class MainClass {<br />
public static void main(String args[]) throws Exception {<br />
ChangeListener changeListener = new BoundedChangeListener();<br />
JScrollBar anotherJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);<br />
BoundedRangeModel model = anotherJScrollBar.getModel();<br />
model.addChangeListener(changeListener);<br />
JFrame frame = new JFrame("ScrollBars R Us");<br />
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<br />
frame.add(anotherJScrollBar, BorderLayout.NORTH);<br />
frame.setSize(300, 200);<br />
frame.setVisible(true);<br />
}<br />
}<br />
class BoundedChangeListener implements ChangeListener {<br />
public void stateChanged(ChangeEvent changeEvent) {<br />
Object source = changeEvent.getSource();<br />
if (source instanceof BoundedRangeModel) {<br />
BoundedRangeModel aModel = (BoundedRangeModel) source;<br />
if (!aModel.getValueIsAdjusting()) {<br />
System.out.println("Changed: " + aModel.getValue());<br />
}<br />
} else if (source instanceof JSlider) {<br />
JSlider theJSlider = (JSlider) source;<br />
if (!theJSlider.getValueIsAdjusting()) {<br />
System.out.println("Slider changed: " + theJSlider.getValue());<br />
}<br />
} else if (source instanceof JProgressBar) {<br />
JProgressBar theJProgressBar = (JProgressBar) source;<br />
System.out.println("ProgressBar changed: " + theJProgressBar.getValue());<br />
} else {<br />
System.out.println("Something changed: " + source);<br />
}<br />
}<br />
}<br />
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</source><br />
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<!-- end source code --></div>
Admin