1 files changed, 20 insertions, 0 deletions
diff --git a/src/heretic/d_main.c b/src/heretic/d_main.c
index cf844e70..94d51851 100644
--- a/src/heretic/d_main.c
+++ b/src/heretic/d_main.c
@@ -188,6 +188,24 @@ void D_Display(void)
     I_FinishUpdate();
 }
 
+//
+// D_GrabMouseCallback
+//
+// Called to determine whether to grab the mouse pointer
+//
+
+boolean D_GrabMouseCallback(void)
+{
+    // when menu is active or game is paused, release the mouse 
+ 
+    if (MenuActive || paused)
+        return false;
+
+    // only grab mouse when playing levels (but not demos)
+
+    return (gamestate == GS_LEVEL) && !demoplayback;
+}
+
 //---------------------------------------------------------------------------
 //
 // PROC D_DoomLoop
@@ -203,6 +221,8 @@ void D_DoomLoop(void)
         debugfile = fopen(filename, "w");
     }
     I_InitGraphics();
+    I_SetGrabMouseCallback(D_GrabMouseCallback);
+
     while (1)
     {
         // Frame syncronous IO operations