[patch] VBoxSDL --grabimmediate

[Warren Block]

The attached patch adds a --grabimmediate option to VBoxSDL.  This lets 
VBoxSDL start with the mouse and keyboard input already grabbed.

Use cases:

For console-only guests, the mouse pointer is useless and only goes away 
when the user clicks.

Running full-screen guests, one would usually want the input grabbed 
immediately anyway.  (It could be argued that the --fullscreen option 
should grab input immediately by default.)

To use, copy the patch to /usr/ports/emulators/virtualbox-ose and 
rebuild the port.

Feedback welcome.

-Warren Block * Rapid City, South Dakota USA
-------------- next part --------------
--- src/VBox/Frontends/VBoxSDL/VBoxSDL.cpp.orig	2009-12-17 07:27:56.000000000 -0700
+++ src/VBox/Frontends/VBoxSDL/VBoxSDL.cpp	2010-01-28 09:36:27.000000000 -0700
@@ -178,6 +178,7 @@
 static const char *gHostKeyDisabledCombinations = "";
 static const char *gpszPidFile;
 static BOOL gfGrabbed = FALSE;
+static BOOL gfGrabImmediate = FALSE;
 static BOOL gfGrabOnMouseClick = TRUE;
 static BOOL gfFullscreenResize = FALSE;
 static BOOL gfIgnoreNextResize = FALSE;
@@ -663,6 +664,7 @@
              "  --nohostkey              Disable all hostkey combinations\n"
              "  --nohostkeys ...         Disable specific hostkey combinations, see below for valid keys\n"
              "  --nograbonclick          Disable mouse/keyboard grabbing on mouse click w/o additions\n"
+             "  --grabimmediate          Start with grab active\n"
              "  --detecthostkey          Get the hostkey identifier and modifier state\n"
              "  --hostkey <key> {<key2>} <mod> Set the host key to the values obtained using --detecthostkey\n"
              "  --termacpi               Send an ACPI power button event when closing the window\n"
@@ -1200,6 +1202,11 @@
         {
             gfGrabOnMouseClick = FALSE;
         }
+        else if (   !strcmp(argv[curArg], "--grabimmediate")
+                 || !strcmp(argv[curArg], "-grabimmediate"))
+        {
+            gfGrabImmediate = TRUE;
+        }
         else if (   !strcmp(argv[curArg], "--termacpi")
                  || !strcmp(argv[curArg], "-termacpi"))
         {
@@ -1859,7 +1866,7 @@
         // create our SDL framebuffer instance
         gpFramebuffer[i] = new VBoxSDLFB(i, fFullscreen, fResizable, fShowSDLConfig, false,
                                          fixedWidth, fixedHeight, fixedBPP);

         if (!gpFramebuffer[i])
         {
             RTPrintf("Error: could not create framebuffer object!\n");
@@ -1996,6 +2003,12 @@
     }
 #endif
 
+    /*
+     * WB: --grabimmediate: grab mouse input as soon as possible.
+     */
+    if (gfGrabImmediate)
+        InputGrabStart();
+
     rc = E_FAIL;
 #ifdef VBOXSDL_ADVANCED_OPTIONS
     if (fRawR0 != ~0U)
@@ -2306,7 +2319,7 @@
         RTFileWrite(PidFile, pcszLf, strlen(pcszLf), NULL);
         RTFileClose(PidFile);
     }

     /*
      * Main event loop
      */