commit 0ca9f8a42d64571d3310ea25a63588d77efd58c3
author Dustin Kirkland <kirkland@canonical.com> Thu Sep 17 15:48:04 2009 -0500
committer Anthony Liguori <aliguori@us.ibm.com> Tue Oct 06 14:36:09 2009 -0500
tree cd2f18ba56b3f3dbb5ceb68e0cf9accc812e71f8
parent a6af8e5f96d4815c13e58af106bb9b8535f799a4

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>

sdl.c

diff --git a/sdl.c b/sdl.c
index 42b6f37..034440f 100644
--- a/sdl.c
+++ b/sdl.c
@@ -414,10 +414,12 @@
     if (!vm_running)
         status = " [Stopped]";
     else if (gui_grab) {
-        if (!alt_grab)
-            status = " - Press Ctrl-Alt to exit grab";
-        else
+        if (alt_grab)
             status = " - Press Ctrl-Alt-Shift to exit grab";
+        else if (ctrl_grab)
+            status = " - Press Right-Ctrl to exit grab";
+        else
+            status = " - Press Ctrl-Alt to exit grab";
     }
 
     if (qemu_name) {
@@ -557,12 +559,14 @@
         case SDL_KEYDOWN:
         case SDL_KEYUP:
             if (ev->type == SDL_KEYDOWN) {
-                if (!alt_grab) {
-                    mod_state = (SDL_GetModState() & gui_grab_code) ==
-                                gui_grab_code;
-                } else {
+                if (alt_grab) {
                     mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
                                 (gui_grab_code | KMOD_LSHIFT);
+                } else if (ctrl_grab) {
+                    mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
+                } else {
+                    mod_state = (SDL_GetModState() & gui_grab_code) ==
+                                gui_grab_code;
                 }
                 gui_key_modifier_pressed = mod_state;
                 if (gui_key_modifier_pressed) {