Add alternate grab key, by Michael Mohr.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2990 c046a42c-6fe2-441c-8c8c-71466251a162

sdl.c

@@ -223,8 +223,12 @@ static void sdl_update_caption(void)
 
     if (!vm_running)
         status = " [Stopped]";
-    else if (gui_grab)
+    else if (gui_grab) {
-        status = " - Press Ctrl-Alt to exit grab";
+        if (!alt_grab)
+            status = " - Press Ctrl-Alt to exit grab";
+        else
+            status = " - Press Ctrl-Alt-Shift to exit grab";
+    }
 
     if (qemu_name)
         snprintf(buf, sizeof(buf), "QEMU (%s)%s", qemu_name, status);
@@ -357,8 +361,13 @@ static void sdl_refresh(DisplayState *ds)
         case SDL_KEYDOWN:
         case SDL_KEYUP:
             if (ev->type == SDL_KEYDOWN) {
-                mod_state = (SDL_GetModState() & gui_grab_code) ==
+                if (!alt_grab) {
-                    gui_grab_code;
+                    mod_state = (SDL_GetModState() & gui_grab_code) ==
+                                gui_grab_code;
+                } else {
+                    mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
+                                (gui_grab_code | KMOD_LSHIFT);
+                }
                 gui_key_modifier_pressed = mod_state;
                 if (gui_key_modifier_pressed) {
                     int keycode;
@@ -419,7 +428,12 @@ static void sdl_refresh(DisplayState *ds)
                     }
                 }
             } else if (ev->type == SDL_KEYUP) {
-                mod_state = (ev->key.keysym.mod & gui_grab_code);
+                if (!alt_grab) {
+                    mod_state = (ev->key.keysym.mod & gui_grab_code);
+                } else {
+                    mod_state = (ev->key.keysym.mod &
+                                 (gui_grab_code | KMOD_LSHIFT));
+                }
                 if (!mod_state) {
                     if (gui_key_modifier_pressed) {
                         gui_key_modifier_pressed = 0;

vl.c

@@ -196,6 +196,7 @@ int nb_option_roms;
 int semihosting_enabled = 0;
 int autostart = 1;
 const char *qemu_name;
+int alt_grab = 0;
 #ifdef TARGET_SPARC
 unsigned int nb_prom_envs = 0;
 const char *prom_envs[MAX_PROM_ENVS];
@@ -6553,6 +6554,7 @@ void help(void)
            "-snapshot       write to temporary files instead of disk image files\n"
 #ifdef CONFIG_SDL
            "-no-frame       open SDL window without a frame and window decorations\n"
+           "-alt-grab       use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n"
            "-no-quit        disable SDL window close capability\n"
 #endif
 #ifdef TARGET_I386
@@ -6736,6 +6738,7 @@ enum {
     QEMU_OPTION_loadvm,
     QEMU_OPTION_full_screen,
     QEMU_OPTION_no_frame,
+    QEMU_OPTION_alt_grab,
     QEMU_OPTION_no_quit,
     QEMU_OPTION_pidfile,
     QEMU_OPTION_no_kqemu,
@@ -6829,6 +6832,7 @@ const QEMUOption qemu_options[] = {
     { "full-screen", 0, QEMU_OPTION_full_screen },
 #ifdef CONFIG_SDL
     { "no-frame", 0, QEMU_OPTION_no_frame },
+    { "alt-grab", 0, QEMU_OPTION_alt_grab },
     { "no-quit", 0, QEMU_OPTION_no_quit },
 #endif
     { "pidfile", HAS_ARG, QEMU_OPTION_pidfile },
@@ -7544,6 +7548,9 @@ int main(int argc, char **argv)
             case QEMU_OPTION_no_frame:
                 no_frame = 1;
                 break;
+            case QEMU_OPTION_alt_grab:
+                alt_grab = 1;
+                break;
             case QEMU_OPTION_no_quit:
                 no_quit = 1;
                 break;

vl.h

@@ -156,6 +156,7 @@ extern int graphic_depth;
 extern const char *keyboard_layout;
 extern int kqemu_allowed;
 extern int win2k_install_hack;
+extern int alt_grab;
 extern int usb_enabled;
 extern int smp_cpus;
 extern int cursor_hide;