问题描述
任何人都可以给我提供一个JNA鼠标钩的工作示例，该示例可以跟踪鼠标移动/在Java Swing应用程序外部单击吗?
Can any one provide me with a working example of JNA mouse hook, which would be able to track mouse movements/click outside my Java Swing application ?
预先感谢
推荐答案
是的，下面是代码...
Yep, here is the code...
public class CWMouseHook {
public final User32 USER32INST;
public final Kernel32 KERNEL32INST;
public CWMouseHook()
{
if(!Platform.isWindows())
{
throw new UnsupportedOperationException("Not supported on this platform.");
}
USER32INST = User32.INSTANCE;
KERNEL32INST = Kernel32.INSTANCE;
mouseHook=hookTheMouse();
Native.setProtected(true);
}
public static LowLevelMouseProc mouseHook;
public HHOOK hhk;
public Thread thrd;
public boolean threadFinish = true;
public boolean isHooked = false;
public static final int WM_MOUSEMOVE = 512;
public static final int WM_LBUTTONDOWN = 513;
public static final int WM_LBUTTONUP = 514;
public static final int WM_RBUTTONDOWN = 516;
public static final int WM_RBUTTONUP = 517;
public static final int WM_MBUTTONDOWN = 519;
public static final int WM_MBUTTONUP = 520;
public void unsetMouseHook()
{
threadFinish = true;
if (thrd.isAlive())
{
thrd.interrupt();
thrd = null;
}
isHooked = false;
}
public boolean isIsHooked()
{
return isHooked;
}
public void setMouseHook()
{
thrd = new Thread(new Runnable() {
@Override
public void run()
{
try
{
if(!isHooked)
{
hhk = USER32INST.SetWindowsHookEx(14, mouseHook,KERNEL32INST.GetModuleHandle(null),0);
isHooked = true;
MSG msg = new MSG();
while ((USER32INST.GetMessage(msg, null, 0, 0)) != 0)
{
USER32INST.TranslateMessage(msg);
USER32INST.DispatchMessage(msg);
System.out.print(isHooked);
if (!isHooked)
break;
}
}
else
System.out.println("The Hook is already installed.");
}
catch (Exception e)
{ System.err.println(e.getMessage());
System.err.println("Caught exception in MouseHook!");
}
}
},"Named thread");
threadFinish = false;
thrd.start();
}
private interface LowLevelMouseProc extends HOOKPROC
{
LRESULT callback(int nCode, WPARAM wParam, MOUSEHOOKSTRUCT lParam);
}
public LowLevelMouseProc hookTheMouse() {
return new LowLevelMouseProc()
{
@Override
public LRESULT callback(int nCode, WPARAM wParam, MOUSEHOOKSTRUCT info) {
if (nCode >= 0)
{
switch(wParam.intValue())
{
case CWMouseHook.WM_LBUTTONDOWN:
// do stuff
break;
case CWMouseHook.WM_RBUTTONDOWN:
//do stuff
break;
case CWMouseHook.WM_MBUTTONDOWN:
//do other stuff
break;
case CWMouseHook.WM_LBUTTONUP:
//do even more stuff
break;
case CWMouseHook.WM_MOUSEMOVE:
break;
default:
break;
}
/****************************DO NOT CHANGE, this code unhooks mouse *********************************/
if (threadFinish == true)
{
USER32INST.PostQuitMessage(0);
}
/***************************END OF UNCHANGABLE *******************************************************/
}
return USER32INST.CallNextHookEx(hhk, nCode, wParam, info.getPointer());
}
};
}
public class Point extends Structure
{
public class ByReference extends Point implements Structure.ByReference {};
public NativeLong x;
public NativeLong y;
}
public static class MOUSEHOOKSTRUCT extends Structure
{
public static class ByReference extends MOUSEHOOKSTRUCT implements Structure.ByReference {};
public POINT pt;
public HWND hwnd;
public int wHitTestCode;
public ULONG_PTR dwExtraInfo;
}
仅此而已.干杯.这基本上是Sun论坛中某个人的代码的抄袭……但我也对其进行了测试，并且再次奏效.
That's all about there is to it. Cheers.It's a basically a ripoff of the code of a guy in Sun forums...but also tested by me, and it works so cheers again.
我已经编辑了代码，因此它包含LowLevelMouseProc，但是您可以使用HOOK的扩展名，您可以在其他位置定义它.没关系.请警惕，由于某种原因，您必须将变量mouseHook设置为静态，否则会在一段时间后取消钩子.
I edited the code so it includes the LowLevelMouseProc but you can use your extension of HOOK which you can define elsewhere. It doesn't matter that much. Be wary that for some reason you have TO have the variable mouseHook as static otherwise hook just unhooks after a while.
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