Hi,


I'd like to get the window ID of a frame.
I'm runing java on Linux.

I've seen on a web site that I can get it from the JAWT_X11DrawingSurfaceInfo.

So I did this to get the JAWT_X11DrawingSurfaceInfo :

			

			
				

				JNIEXPORT jlong JNICALL Java_MyFrame_getWindowID(JNIEnv *env, jclass cls, jobject comp) {
				

				JAWT awt;
				

				JAWT_DrawingSurface *ds;
				

				JAWT_DrawingSurfaceInfo *dsi;
				

				JAWT_X11DrawingSurfaceInfo *dsi_X11;
				

				jint lock;
				

				jlong windowID;
				

				jboolean result;
				

				

				/* get the awt */
				

				awt.version = JAWT_VERSION_1_3;
				

				result = JAWT_GetAWT(env, &awt);
				

				assert(result != JNI_FALSE);
				

				

				/* get the drawing surface */
				

				ds = awt.GetDrawingSurface(env, comp);
				

				assert(ds != NULL);
				

				

				/* lock the drawing surface */
				

				lock = ds->Lock(ds);
				

				assert((lock & JAWT_LOCK_ERROR) == 0);
				

				

				/* get the drawing surface info */
				

				dsi = ds->GetDrawingSurfaceInfo(ds);
				

				

				/* get the X11 drawing surface info */
				

				dsi_X11 = (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;
				

				

				windowID = (jlong)dsi_X11->visualID;
				

				

				/* resource cleanup */
				

				ds->FreeDrawingSurfaceInfo(dsi);
				

				ds->Unlock(ds);
				

				awt.FreeDrawingSurface(ds);
				

				

				return windowID;
				

				}
				

			
			

		

My pb is that I can't lock my frame. It always crash here : assert((lock & JAWT_LOCK_ERROR) == 0);


I'm completly lost at the moment, any help will be welcome.

Thank you for your answers.


Nicolas