SWT(JFace)体验之Slider，Scale

Slider：
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：
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();
}
}

再看一个演示：

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();
}
}