1 files changed, 56 insertions, 0 deletions
diff --git a/src/newt/native/X11Window.c b/src/newt/native/X11Window.c
index de2bddc86..8fb3ecbb9 100644
--- a/src/newt/native/X11Window.c
+++ b/src/newt/native/X11Window.c
@@ -952,6 +952,62 @@ JNIEXPORT jlongArray JNICALL Java_jogamp_newt_driver_x11_WindowDriver_CreateWind
             NewtWindows_setMinMaxSize(dpy, javaWindow, width, height, width, height);
         }
     }
+    
+    // Register X11 Multitouch Events for new Window
+    // https://www.x.org/wiki/Development/Documentation/Multitouch/
+    {
+        int xi_opcode, event, error;
+
+        javaWindow->xiTouchDeviceId = -1;
+
+        if( XQueryExtension(dpy, "XInputExtension", &xi_opcode, &event, &error) ) {
+            XIDeviceInfo *di;
+            int devid = -1;
+            int cnt = 0;
+
+            javaWindow->xiOpcode = xi_opcode;
+            di = XIQueryDevice(dpy, XIAllDevices, &cnt);
+
+            if( NULL != di && 0 < cnt ) {
+                XIDeviceInfo *dev;
+                int i, j;
+      
+                // find the 1st XITouchClass device available
+                for (i = 0; i < cnt && -1 == devid; i ++) {
+                    dev = &di[i];
+                    for (j = 0; j < dev->num_classes; j ++) {
+                        XITouchClassInfo *class = (XITouchClassInfo*)(dev->classes[j]);
+                        if ( XITouchClass == class->type ) {
+                          devid = dev->deviceid;
+                          break;
+                        }
+                    }
+                }
+                XIFreeDeviceInfo(di);
+                di = NULL;
+                
+                if( -1 != devid ) {
+                    // register 1st XITouchClass device if available
+                    XIEventMask mask = {
+                      .deviceid = devid,
+                      .mask_len = XIMaskLen(XI_TouchEnd) // in bytes
+                    };
+                    
+                    mask.mask = (unsigned char*)calloc(mask.mask_len, sizeof(unsigned char));
+                    XISetMask(mask.mask, XI_TouchBegin);
+                    XISetMask(mask.mask, XI_TouchUpdate);
+                    XISetMask(mask.mask, XI_TouchEnd);
+      
+                    XISelectEvents(dpy, window, &mask, 1);
+      
+                    free(mask.mask);      
+      
+                    javaWindow->xiTouchDeviceId = devid;
+                }
+            }
+        }
+    }
+    
     XFlush(dpy);
     handles[0] = (jlong)(intptr_t)window;
     handles[1] = (jlong)(intptr_t)javaWindow;