SWT(JFace)體驗之Slider，Scale

來源：本站原創(chuàng)|時間：2020-01-10|欄目：Java編程|點擊：次

Slider：

復(fù)制代碼代碼如下:

package swt_jface.demo8; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.layout.GridData; 
import org.eclipse.swt.layout.GridLayout; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Event; 
import org.eclipse.swt.widgets.Label; 
import org.eclipse.swt.widgets.Listener; 
import org.eclipse.swt.widgets.Shell; 
import org.eclipse.swt.widgets.Slider; 
import org.eclipse.swt.widgets.Text; 
public class SampleSlider { 

Display display = new Display(); 
Shell shell = new Shell(display); 
Slider slider; 
Text value; 

public SampleSlider() { 

shell.setLayout(new GridLayout(1, true)); 

Label label = new Label(shell, SWT.NULL); 
label.setText("Volume:"); 

slider = new Slider(shell, SWT.VERTICAL); 
slider.setBounds(0, 0, 40, 200); 
slider.setMaximum(24); 
slider.setMinimum(0); 
slider.setIncrement(1); 
slider.setPageIncrement(5); 
slider.setThumb(4); 
slider.addListener(SWT.Selection, new Listener() { 
public void handleEvent(Event event) { 
int perspectiveValue = slider.getMaximum() - slider.getSelection() + slider.getMinimum() - slider.getThumb(); 
value.setText("Vol: " + perspectiveValue); 
} 
}); 

value = new Text(shell, SWT.BORDER | SWT.SINGLE); 
value.setEditable(false); 
slider.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER)); 
value.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER)); 
shell.pack(); 
shell.open(); 
while (!shell.isDisposed()) { 
if (!display.readAndDispatch()) { 
display.sleep(); 
} 
} 
display.dispose(); 
} 
public static void main(String[] args) { 
new SampleSlider(); 
} 
}

Scale：

復(fù)制代碼代碼如下:

 
package swt_jface.demo8; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Scale; 
import org.eclipse.swt.widgets.Shell; 
public class Scales { 

Display display = new Display(); 
Shell shell = new Shell(display); 
public Scales() { 

Scale scaleH = new Scale(shell, SWT.NULL); 
Scale scaleV = new Scale(shell, SWT.VERTICAL); 

scaleH.setBounds(0, 0, 100, 50); 
scaleV.setBounds(0, 50, 50, 100); 

System.out.println("Min: " + scaleH.getMinimum()); 
System.out.println("Max: " + scaleH.getMaximum()); 
shell.pack(); 
shell.open(); 

while (!shell.isDisposed()) { 
if (!display.readAndDispatch()) { 
display.sleep(); 
} 
} 
display.dispose(); 
} 
public static void main(String[] args) { 
new Scales(); 
} 
} 
package swt_jface.demo8; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Scale; 
import org.eclipse.swt.widgets.Shell; 
public class Scales { 

Display display = new Display(); 
Shell shell = new Shell(display); 
public Scales() { 

Scale scaleH = new Scale(shell, SWT.NULL); 
Scale scaleV = new Scale(shell, SWT.VERTICAL); 

scaleH.setBounds(0, 0, 100, 50); 
scaleV.setBounds(0, 50, 50, 100); 

System.out.println("Min: " + scaleH.getMinimum()); 
System.out.println("Max: " + scaleH.getMaximum()); 
shell.pack(); 
shell.open(); 

while (!shell.isDisposed()) { 
if (!display.readAndDispatch()) { 
display.sleep(); 
} 
} 
display.dispose(); 
} 
public static void main(String[] args) { 
new Scales(); 
} 
} 

再看一個演示：

復(fù)制代碼代碼如下:

 
package swt_jface.demo8; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.layout.GridData; 
import org.eclipse.swt.layout.GridLayout; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Event; 
import org.eclipse.swt.widgets.Label; 
import org.eclipse.swt.widgets.Listener; 
import org.eclipse.swt.widgets.Scale; 
import org.eclipse.swt.widgets.Shell; 
import org.eclipse.swt.widgets.Text; 
public class ScaleExample { 

Display display = new Display(); 
Shell shell = new Shell(display); 
Scale scale; 
Text value; 

public ScaleExample() { 

shell.setLayout(new GridLayout(1, true)); 

Label label = new Label(shell, SWT.NULL); 
label.setText("Volume:"); 

scale = new Scale(shell, SWT.VERTICAL); 
scale.setBounds(0, 0, 40, 200); 
scale.setMaximum(20); 
scale.setMinimum(0); 
scale.setIncrement(1); 
scale.setPageIncrement(5); 
scale.addListener(SWT.Selection, new Listener() { 
public void handleEvent(Event event) { 
int perspectiveValue = scale.getMaximum() - scale.getSelection() + scale.getMinimum(); 
value.setText("Vol: " + perspectiveValue); 
} 
}); 

value = new Text(shell, SWT.BORDER | SWT.SINGLE); 
value.setEditable(false); 
scale.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER)); 
value.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER)); 
shell.pack(); 
shell.open(); 

while (!shell.isDisposed()) { 
if (!display.readAndDispatch()) { 
display.sleep(); 
} 
} 
display.dispose(); 
} 
public static void main(String[] args) { 
new ScaleExample(); 
} 
} 