offer right-ctrl as a grab option

Add support for -ctrl-grab to use the right-ctrl button to grab/release
the mouse in SDL.

The multi-button ctrl-alt and ctrl-alt-shift grab buttons present an
accessibility problem to users who cannot press more than one button
at a time.

https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/237635

Signed-off-by: Dustin Kirkland <kirkland@canonical.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/vl.c b/vl.c
index 6d79912172..3d2314025c 100644
--- a/vl.c
+++ b/vl.c
@@ -247,6 +247,7 @@ int old_param = 0;
 #endif
 const char *qemu_name;
 int alt_grab = 0;
+int ctrl_grab = 0;
 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
 unsigned int nb_prom_envs = 0;
 const char *prom_envs[MAX_PROM_ENVS];
@@ -5310,6 +5311,9 @@ int main(int argc, char **argv, char **envp)
             case QEMU_OPTION_alt_grab:
                 alt_grab = 1;
                 break;
+            case QEMU_OPTION_ctrl_grab:
+                ctrl_grab = 1;
+                break;
             case QEMU_OPTION_no_quit:
                 no_quit = 1;
                 break;