尝试通过 jni 调用从 java 更改 Windows 鼠标光标图标

发布于 2024-11-13 06:10:53 字数 1062 浏览 3 评论 0原文

在我的java应用程序中，我尝试使用具有透明度的argb 32位bmp文件更改鼠标光标。

我想进行 jni 调用以从 Windows 更改它，因为在 java 中更改光标会给我一个非常糟糕的鼠标光标（所有透明度都是 0x00 或 0xFF）

目前我正在尝试使用函数 SetClassLong 作为参数：

来自java的hWnd（我按照该方法得到它 http:// /download.oracle.com/javase/1.3/docs/guide/awt/AWT_Native_Interface.html )
GCL_HCURSOR
和由原始 argb 32 位 bmp 缓冲区制成的光标

该代码段在示例 win32 atl windows 测试程序中工作：

HBITMAP hBitmap = (HBITMAP)CreateBitmap(32, 32, 1, 32, pRawBmpData); 
BITMAP bmp;
::GetObject(hBitmap, sizeof(BITMAP), &bmp);

HBITMAP hMask = ::CreateCompatibleBitmap(::GetDC(NULL), bmp.bmWidth, bmp.bmHeight);

ICONINFO ii = {0};
ii.fIcon = FALSE;
ii.hbmColor = hBitmap;
ii.hbmMask = hMask;
ii.xHotspot = 0;
ii.yHotspot = 0;

HCURSOR cursor = ::CreateIconIndirect(&ii);

SetCursor(cursor);
SetClassLong(hWnd, GCL_HCURSOR, (DWORD)cursor);

但不是在通过 jni 从 java 调用的 dll 中

如果有人对这种情况有更好的方法或解决方案，谢谢

干杯

原文

In my java application, i m trying to change the mouse cursor with an argb 32bit bmp file with transparency.

I want to make a jni call to change it from Windows because changing the cursor in java gives me a really bad mouse cursor (all the transparency is either 0x00 or 0xFF)

At the moment i'm trying to use the function SetClassLong with as parameters:

the hWnd from java (i got it following that method http://download.oracle.com/javase/1.3/docs/guide/awt/AWT_Native_Interface.html )
GCL_HCURSOR
and a cursor made from a raw argb 32bit bmp buffer

That piece of code works in a sample win32 atl windows test program:

HBITMAP hBitmap = (HBITMAP)CreateBitmap(32, 32, 1, 32, pRawBmpData); 
BITMAP bmp;
::GetObject(hBitmap, sizeof(BITMAP), &bmp);

HBITMAP hMask = ::CreateCompatibleBitmap(::GetDC(NULL), bmp.bmWidth, bmp.bmHeight);

ICONINFO ii = {0};
ii.fIcon = FALSE;
ii.hbmColor = hBitmap;
ii.hbmMask = hMask;
ii.xHotspot = 0;
ii.yHotspot = 0;

HCURSOR cursor = ::CreateIconIndirect(&ii);

SetCursor(cursor);
SetClassLong(hWnd, GCL_HCURSOR, (DWORD)cursor);

But not in a dll called from java through jni

If somebody has a better approach or solution to this case, thanks

Cheers

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