SWT(JFace)体验之Slider，Scale

Slider：

复制代码 代码如下:

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("Vol编程客栈ume:");

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：

复制代码 代码如下:

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 S开发者_C教程cales {

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.readAhTgMoRkAMcndDispatch()) {

display.sleep();

}

}

display.d编程客栈ispose();

}

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()) {

disp编程客栈lay.sleep();

}

}

display.dispose();

}

public static void main(String[] args) {

new Scales();

}

}

再看一个演示：

复制代码 代码如下:

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));

sh编程客栈ell.pack();

shell.open();

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

display.dispose();

}

public static void main(String[] args) {

new ScaleExample();

}

}