Java 中的 Windows 7 任务栏进度条
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StackOverFlow
Windows 7 Taskbar Progress Bar in Java
提问by
I'd like to know if it is possible to make a progress bar displayed on the taskbar like Windows Explorer does when there's a file operation going on?
我想知道是否可以在进行文件操作时像 Windows 资源管理器一样在任务栏上显示进度条？
I saw many examples, but they all involved C#.
我看到了很多例子，但它们都涉及 C#。
SWT won't cut it.
SWT 不会削减它。
回答by Eduardo
this is now possible using SWT please review the code example:
org.eclipse.swt.snippets.Snippet336
现在可以使用 SWT，请查看代码示例：
org.eclipse.swt.snippets.Snippet336
回答by F. Weise
I found out that this feature is included in Java 9. It is part of AWTand it is quity simple too use.
我发现这个特性包含在Java 9 中。它是AWT 的一部分，使用起来也非常简单。
Here is short example:
这是一个简短的例子：
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);
}
}
回答by BullyWiiPlaza
Thisexample will do the job:
这个例子将完成这项工作：
Task bar:
任务栏：
Code:
代码：
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);
}
}
Mavendependencies:
Maven依赖项：
<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>
回答by Thorbj?rn Ravn Andersen
There is no standard facility in Java for doing so, yet.
Java 中还没有这样做的标准工具。
Hence you need to talk to Windows directly to do that. So you need to locate the correct Windows routine, and use JNA (probably the easiest) to invoke that routine. I do not know of a vendor or a project who has done this already.
因此，您需要直接与 Windows 交谈才能做到这一点。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。我不知道有哪家供应商或项目已经这样做了。
Edit: It appears that the http://code.google.com/p/nativelibs4java/project may do what you want.
编辑：看来http://code.google.com/p/nativelibs4java/项目可能会做你想做的事。
回答by Kate Gregory
Windows exposes this through COM. I am sure a "flat DLL" call would be easier for you, but if you can get to COM you can do this. The COM interface is ITaskbarList3 (there is also an ITaskbarList4 you can use that inherits from it.) http://msdn.microsoft.com/en-us/library/dd391692(VS.85).aspxdocuments it. SetProgressState and SetProgressValue are the methods you will want to invoke. State is normal (green), paused (yellow), error (red), indeterminate (swooshing green) and none. On the MSDN page some community people have added details of calling this COM component from VB and C# - that might help you figure out the setup and tear down required from Java.
Windows 通过 COM 公开这一点。我相信“平面 DLL”调用对您来说会更容易，但是如果您可以访问 COM，您就可以做到这一点。COM 接口是 ITaskbarList3（您还可以使用继承自它的 ITaskbarList4。）http://msdn.microsoft.com/en-us/library/dd391692(VS.85) .aspx记录了它。SetProgressState 和 SetProgressValue 是您要调用的方法。状态为正常（绿色）、暂停（黄色）、错误（红色）、不确定（闪烁的绿色）和无。在 MSDN 页面上，一些社区人员添加了从 VB 和 C# 调用此 COM 组件的详细信息 - 这可能会帮助您找出 Java 所需的设置和拆卸。
回答by Chris_D_Turk
As Java9's java.awt.Taskbar only works for old swing frames (they somehow forgot to implement this for javafx.stage.Stage) and com.nativelibs4java bridj isn't working (anymore) (see https://github.com/nativelibs4java/BridJ/issues/94) I implemented a solution using JNA 4.1.0.
由于 Java9 的 java.awt.Taskbar 仅适用于旧的摇摆框架（他们不知何故忘记为 javafx.stage.Stage 实现此功能）并且 com.nativelibs4java bridj 不起作用（不再）（请参阅https://github.com/nativelibs4java /BridJ/issues/94) 我使用 JNA 4.1.0 实现了一个解决方案。
Please note:
请注意：
- Relies on calling internal javafx api (com.sun.javafx.stage.WindowHelper) - so it might break with the next java update
- It only sets the "indeterminate" progress state - but normal progress state should be possible too with some adjustments
- 依赖于调用内部 javafx api (com.sun.javafx.stage.WindowHelper) - 所以它可能会在下一次 Java 更新时中断
- 它只设置“不确定”的进度状态 - 但通过一些调整也应该可以实现正常的进度状态
Hope this helps.
希望这可以帮助。
ITaskbarList3.java
ITaskbarList3.java
package example;
import com.sun.jna.platform.win32.Guid.IID;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinNT.HRESULT;
public interface ITaskbarList3 {
IID IID_ITASKBARLIST3 = new IID("ea1afb91-9e28-4b86-90e9-9e9f8a5eefaf"); // from ShObjIdl.h
int TBPF_NOPROGRESS = 0;
int TBPF_INDETERMINATE = 0x1;
int TBPF_NORMAL = 0x2;
int TBPF_ERROR = 0x4;
int TBPF_PAUSED = 0x8;
HRESULT SetProgressState(HWND hwnd, int tbpFlags);
}
TaskbarList3.java
任务栏列表3.java
package example;
import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinNT.HRESULT;
import com.sun.jna.platform.win32.COM.COMInvoker;
public final class TaskbarList3 extends COMInvoker implements ITaskbarList3 {
public TaskbarList3(Pointer pointer) {
setPointer(pointer);
}
@Override
public HRESULT SetProgressState(HWND hwnd, int tbpFlags) {
return (HRESULT) this._invokeNativeObject(
10, // magic number (gathered by trial and error)
new Object[] { this.getPointer(), hwnd, tbpFlags },
HRESULT.class);
}
}
TaskbarPeer.java
TaskbarPeer.java
package example;
import com.sun.javafx.stage.WindowHelper;
import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.Guid.CLSID;
import com.sun.jna.platform.win32.Ole32;
import com.sun.jna.platform.win32.W32Errors;
import com.sun.jna.platform.win32.WTypes;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.ptr.PointerByReference;
import javafx.stage.Stage;
public final class TaskbarPeer {
public static void setIndeterminateProgress(Stage stage, boolean indeterminate) {
final var peer = WindowHelper.getPeer(stage);
final long windowHandle = peer.getRawHandle();
final var clsid = new CLSID("56FDF344-FD6D-11d0-958A-006097C9A090"); // from ShObjIdl.h
final var taskbarListPointerRef = new PointerByReference();
var hr = Ole32.INSTANCE.CoCreateInstance(clsid, null, WTypes.CLSCTX_SERVER,
ITaskbarList3.IID_ITASKBARLIST3, taskbarListPointerRef);
if (W32Errors.FAILED(hr)) {
throw new RuntimeException("failed with code: " + hr.intValue());
}
final TaskbarList3 taskbarList = new TaskbarList3(taskbarListPointerRef.getValue());
final var hwnd = new HWND(new Pointer(windowHandle));
final int progressState = indeterminate ? ITaskbarList3.TBPF_INDETERMINATE : ITaskbarList3.TBPF_NOPROGRESS;
hr = taskbarList.SetProgressState(hwnd, progressState);
if (W32Errors.FAILED(hr)) {
throw new RuntimeException("failed with code: " + hr.intValue());
}
}
}
Sample.java
示例.java
package example;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
public final class Sample extends Application {
private boolean indeterminateProgressState = false;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
final Button btn = new Button("Click me!");
primaryStage.setScene(new Scene(btn));
primaryStage.sizeToScene();
primaryStage.show();
btn.setOnAction(evt -> {
indeterminateProgressState = !indeterminateProgressState;
TaskbarPeer.setIndeterminateProgress(primaryStage, indeterminateProgressState);
});
}
}
