[Qemu-trivial] [PATCH] sdl: Do not grab mouse on mode switch while in background

[Jan Kiszka <jan.kiszka@web.de>]

From: Jan Kiszka <jan.kiszka@siemens.com>

When the mouse mode changes to absolute while the SDL windows is not in
focus, refrain from grabbing the input. It would steal from some other
window.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---

I bet this makes no difference for your problem, Erik, but I came
across this while trying to reproduce the issue.

 ui/sdl.c |   30 ++++++++++++++++--------------
 1 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/ui/sdl.c b/ui/sdl.c
index 8cafc44..384276d 100644
--- a/ui/sdl.c
+++ b/ui/sdl.c
@@ -483,12 +483,27 @@ static void sdl_grab_end(void)
     sdl_update_caption();
 }
 
+static void absolute_mouse_grab(void)
+{
+    int mouse_x, mouse_y;
+
+    if (SDL_GetAppState() & SDL_APPINPUTFOCUS) {
+        SDL_GetMouseState(&mouse_x, &mouse_y);
+        if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&
+            mouse_y > 0 && mouse_y < real_screen->h - 1) {
+            sdl_grab_start();
+        }
+    }
+}
+
 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 {
     if (kbd_mouse_is_absolute()) {
         if (!absolute_enabled) {
-            sdl_grab_start();
             absolute_enabled = 1;
+            if (is_graphic_console()) {
+                absolute_mouse_grab();
+            }
         }
     } else if (absolute_enabled) {
         if (!gui_fullscreen) {
@@ -571,19 +586,6 @@ static void toggle_full_screen(DisplayState *ds)
     vga_hw_update();
 }
 
-static void absolute_mouse_grab(void)
-{
-    int mouse_x, mouse_y;
-
-    if (SDL_GetAppState() & SDL_APPINPUTFOCUS) {
-        SDL_GetMouseState(&mouse_x, &mouse_y);
-        if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&
-            mouse_y > 0 && mouse_y < real_screen->h - 1) {
-            sdl_grab_start();
-        }
-    }
-}
-
 static void handle_keydown(DisplayState *ds, SDL_Event *ev)
 {
     int mod_state;
-- 
1.7.3.4