处理长时间的任务的时候常需要进度条显示,有几种实现方式
1,普通的进度条
import java.lang.reflect.InvocationTargetException;
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import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
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public class TestProgress
{
static boolean stopflg = false;
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/** *//**
* Launch the application
* @param args
*/
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public static void main(String[] args) throws Exception
{
final Display display = Display.getDefault();
final Shell shell = new Shell();
shell.setSize(500, 375);
shell.setText("SWT Application");
//
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IRunnableWithProgress runnable = new IRunnableWithProgress()
{
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public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException
{
monitor.beginTask("generate", 30);
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for(int i=0;i<100;i++)
{
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if(monitor.isCanceled())
{
return;
}
monitor.worked(1);
Thread.sleep(50);
}
monitor.done();
}
};
new ProgressMonitorDialog(shell).run(true, true, runnable);
shell.open();
shell.layout();
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while (!shell.isDisposed())
{
if (!display.readAndDispatch())
display.sleep();
}
}
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}
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2,反复循环的进度条
import java.lang.reflect.InvocationTargetException;
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import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
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public class TestProgress
{
static boolean stopflg = false;
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/** *//**
* Launch the application
* @param args
*/
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public static void main(String[] args) throws Exception
{
final Display display = Display.getDefault();
final Shell shell = new Shell();
shell.setSize(500, 375);
shell.setText("SWT Application");
//
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IRunnableWithProgress runnable = new IRunnableWithProgress()
{
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public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException
{
monitor.beginTask("generate", 30);
int i=0;
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while(true)
{
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if(stopflg)
{
break;
}
i++;
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if(i==30)
{
i=0;
monitor.beginTask("generate", 30);
}
monitor.worked(1);
Thread.sleep(100);
}
monitor.done();
}
};
new ProgressMonitorDialog(shell).run(true, true, runnable);
shell.open();
shell.layout();
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while (!shell.isDisposed())
{
if (!display.readAndDispatch())
display.sleep();
}
}
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}
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3,rcp中后台任务的进度条
使用Job建立后台任务,只需要设置job.setUser(true)进度条就出现了,和上边一样,进度条需要自己来控制进度。如果做一个cool的进度条,就看你如何让进度条显示出实际的任务进程。
posted on 2007-08-13 10:30
冬天出走的猪 阅读(598)
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