This code allows Java JFrames to behave like the LWJGL window, ie, no system menu when you click the icon.
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#include <jni.h>
#ifndef _Included_library_NativeRoutines
#define _Included_library_NativeRoutines
#ifdef __cplusplus
extern "C" {
#endif
JNIEXPORT jint JNICALL Java_library_NativeRoutines_hookWindowProcess
(JNIEnv *, jclass, jobject);
#ifdef __cplusplus
}
#endif
#endif
|
C++ source:
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| #include "Library.h"
#include <Windows.h>
#include <jawt_md.h>
#include <jawt.h>
#include <map>
std::map<HWND, WNDPROC> processMap;
LRESULT WINAPI CALLBACK HookedWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
if (uMsg == 0x0112 && wParam == 0xF093) {
return 0;
}
if (uMsg == 0x0112 && wParam == 0xF063) {
return 0;
}
if (uMsg == 0x00A5 || uMsg == 0x00A4) {
return 0;
}
std::map<HWND, WNDPROC>::iterator mWndProc = processMap.find(hWnd);
if (mWndProc == processMap.end()) {
return 0; }
return CallWindowProc(mWndProc->second, hWnd, uMsg, wParam, lParam);
}
JNIEXPORT jint JNICALL Java_library_NativeRoutines_hookWindowProcess
(JNIEnv *env, jclass klass, jobject jframe) {
typedef jboolean (JNICALL *PJAWT_GETAWT)(JNIEnv*, JAWT*);
JAWT awt;
JAWT_DrawingSurface* ds;
JAWT_DrawingSurfaceInfo* dsi;
JAWT_Win32DrawingSurfaceInfo* dsi_win;
jboolean result;
jint lock;
HWND hWnd = 0;
HMODULE hAWT = GetModuleHandle(L"jawt.dll");
if (!hAWT)
hAWT = LoadLibrary(L"jawt.dll");
if (hAWT) {
PJAWT_GETAWT JAWT_GetAWT = (PJAWT_GETAWT) GetProcAddress(hAWT, "_JAWT_GetAWT@8");
if (JAWT_GetAWT) {
awt.version = JAWT_VERSION_1_3;
result = JAWT_GetAWT(env, &awt);
if (result != JNI_FALSE) {
ds = awt.GetDrawingSurface(env, jframe);
if (ds != NULL) {
lock = ds->Lock(ds);
if((lock & JAWT_LOCK_ERROR) == 0) {
dsi = ds->GetDrawingSurfaceInfo(ds);
dsi_win = (JAWT_Win32DrawingSurfaceInfo*)dsi->platformInfo;
hWnd = dsi_win->hwnd;
ds->FreeDrawingSurfaceInfo(dsi);
ds->Unlock(ds);
} else {
return 5;
}
} else {
return 4;
}
awt.FreeDrawingSurface(ds);
} else {
return 3;
}
} else {
return 2;
}
} else {
return 1;
}
LONG oldWndProc = GetWindowLong(hWnd, GWL_WNDPROC);
if (!oldWndProc) {
return 6;
}
processMap[hWnd] = (WNDPROC) oldWndProc;
if (!SetWindowLong(hWnd, GWL_WNDPROC, (LONG) HookedWndProc)) {
return 7;
}
return 0;
} |
Java source:
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package library;
import javax.swing.JFrame;
public class NativeRoutines {
private static native int hookWindowProcess(JFrame jf);
public static boolean hookWndProc(JFrame jf) {
try {
int result = hookWindowProcess(jf);
return result == 0;
} catch (Throwable err) {
err.printStackTrace();
return false;
}
}
}
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How to disable the system menu and double icon click that closes the window:
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| try {
System.loadLibrary("jawt");
System.loadLibrary("Library");
library.NativeRoutines.hookWndProc(yourJFrame);
} catch (UnsatisfiedLinkError ex) {
} |
Hope this helps some of you out there.
