Java中的Windows 7任务栏进度条

Question

我想知道是否可以在任务栏上显示进度条,就像Windows资源管理器在进行文件操作时一样？

我看了很多例子,但他们都涉及C#.

SWT不会削减它.

Answer 1

现在可以使用SWT查看代码示例:
org.eclipse.swt.snippets.Snippet336

Answer 2

这个例子将完成这项工作:

任务栏:

码:

import org.bridj.Platform;
import org.bridj.Pointer;
import org.bridj.cpp.com.COMRuntime;
import org.bridj.cpp.com.shell.ITaskbarList3;
import org.bridj.jawt.JAWTUtils;

import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TaskBarListDemo extends JFrame implements ActionListener, ChangeListener
{
    private ITaskbarList3 list;
    private JSlider slider;
    private Pointer<?> hwnd;

    private TaskBarListDemo() throws ClassNotFoundException
    {
        super("TaskbarList Demo (" + (Platform.is64Bits() ? "64 bits" : "32 bits") + ")");

        list = COMRuntime.newInstance(ITaskbarList3.class);

        getContentPane().add("Center", new JLabel("Hello Native Windows 7 World !"));
        Box box = Box.createVerticalBox();

        int min = 0;
        int max = 300;
        int val = (min + max / 2);
        slider = new JSlider(min, max, val);
        slider.addChangeListener(this);
        box.add(slider);

        ButtonGroup group = new ButtonGroup();
        for (ITaskbarList3.TbpFlag state : ITaskbarList3.TbpFlag.values())
        {
            JRadioButton cb = new JRadioButton(state.name());
            group.add(cb);
            cb.putClientProperty(ITaskbarList3.TbpFlag.class, state);
            cb.setSelected(state == ITaskbarList3.TbpFlag.TBPF_NORMAL);
            cb.addActionListener(this);
            box.add(cb);
        }
        getContentPane().add("South", box);

    }

    @Override
    protected void finalize() throws Throwable
    {
        super.finalize();
        list.Release();
    }

    public void setVisible(boolean visible)
    {
        super.setVisible(visible);

        long hwndVal = JAWTUtils.getNativePeerHandle(this);
        hwnd = Pointer.pointerToAddress(hwndVal);
        list.SetProgressValue((Pointer) hwnd, slider.getValue(), slider.getMaximum());
    }

    @Override
    public void stateChanged(ChangeEvent actionEvent)
    {
        list.SetProgressValue((Pointer) hwnd, slider.getValue(), slider.getMaximum());
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent)
    {
        JRadioButton button = ((JRadioButton) actionEvent.getSource());
        if (button.isSelected())
        {
            ITaskbarList3.TbpFlag flag = (ITaskbarList3.TbpFlag) button.getClientProperty(ITaskbarList3.TbpFlag.class);
            list.SetProgressValue((Pointer) hwnd, slider.getValue(), slider.getMaximum());
            list.SetProgressState((Pointer) hwnd, flag);
        }
    }

    public static void main(String[] arguments) throws Exception
    {
        TaskBarListDemo f = new TaskBarListDemo();
        f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        f.pack();
        f.setVisible(true);
    }
}

Maven 依赖关系:

<dependencies>
    <dependency>
        <groupId>com.nativelibs4java</groupId>
        <artifactId>bridj</artifactId>
        <version>LATEST</version>
    </dependency>
    <dependency>
        <groupId>net.java.dev.jna</groupId>
        <artifactId>jna</artifactId>
        <version>LATEST</version>
    </dependency>
    <dependency>
        <groupId>net.java.dev.jna</groupId>
        <artifactId>jna-platform</artifactId>
        <version>LATEST</version>
    </dependency>
</dependencies>

Answer 3

我发现该功能包含在Java 9中。它是AWT的一部分，使用起来也非常简单。

这是一个简短的示例：

import java.awt.Taskbar;
import java.awt.Taskbar.State;

import javax.swing.JFrame;
import javax.swing.WindowConstants;

/**
 * @author fxl
 */
public class TaskbarSample {

    public static void main(String[] args) {

        // JavaDoc:
        // https://docs.oracle.com/javase/9/docs/api/java/awt/Taskbar.html

        // MSDNDoc:
        // https://msdn.microsoft.com/en-us/library/dd391692(VS.85).aspx
        if (Taskbar.isTaskbarSupported() == false) {
            return;
        }

        JFrame dialog = new JFrame("Test - 50%");
        dialog.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        dialog.setVisible(true);    


        Taskbar taskbar = Taskbar.getTaskbar();
        taskbar.setWindowProgressState(dialog, State.ERROR);
        taskbar.setWindowProgressValue(dialog, 50);     
    }

}

Answer 4

但是,Java中没有标准设施.

因此,您需要直接与Windows通信才能这样做.因此,您需要找到正确的Windows例程,并使用JNA(可能是最简单的)来调用该例程.我不知道已经完成此操作的供应商或项目.

编辑:似乎http://code.google.com/p/nativelibs4java/项目可能会执行您想要的操作.