GTK 3.20 compatibility: switch to gdk_seat_grab.

gdk_device_grab and all its preparatory faff are now deprecated, and
gdk_seat_grab is the new thing. Introduce yet another branch to all
the ifdefs for keyboard-grabbing. On the plus side, at least it's
slightly simpler than the GdkDevice business.

diff --git a/unix/gtkask.c b/unix/gtkask.c
index e5439bbb172c8b5e743f9f78218e8c5a0f44ecb3..47ff1a92f0f36f4faaa6811d0b6a226952b6f369 100644 (file)
--- a/unix/gtkask.c
+++ b/unix/gtkask.c
@@ -43,7 +43,9 @@ struct askpass_ctx {
 #endif
     char *passphrase;
     int passlen, passsize;
-#if GTK_CHECK_VERSION(3,0,0)
+#if GTK_CHECK_VERSION(3,20,0)
+    GdkSeat *seat;                     /* for gdk_seat_grab */
+#elif GTK_CHECK_VERSION(3,0,0)
     GdkDevice *keyboard;               /* for gdk_device_grab */
 #endif
 };
@@ -218,9 +220,25 @@ static int try_grab_keyboard(struct askpass_ctx *ctx)
 {
     int ret;
 
-#if GTK_CHECK_VERSION(3,0,0)
+#if GTK_CHECK_VERSION(3,20,0)
     /*
-     * Grabbing the keyboard is quite complicated in GTK 3.
+     * Grabbing the keyboard in GTK 3.20 requires the new notion of
+     * GdkSeat.
+     */
+    GdkSeat *seat;
+
+    seat = gdk_display_get_default_seat
+        (gtk_widget_get_display(ctx->dialog));
+    if (!seat)
+        return FALSE;
+
+    ctx->seat = seat;
+    ret = gdk_seat_grab(seat, gtk_widget_get_window(ctx->dialog),
+                        GDK_SEAT_CAPABILITY_KEYBOARD,
+                        TRUE, NULL, NULL, NULL, NULL);
+#elif GTK_CHECK_VERSION(3,0,0)
+    /*
+     * And it has to be done differently again prior to GTK 3.20.
      */
     GdkDeviceManager *dm;
     GdkDevice *pointer, *keyboard;
@@ -409,7 +427,9 @@ static const char *gtk_askpass_setup(struct askpass_ctx *ctx,
 
 static void gtk_askpass_cleanup(struct askpass_ctx *ctx)
 {
-#if GTK_CHECK_VERSION(3,0,0)
+#if GTK_CHECK_VERSION(3,20,0)
+    gdk_seat_ungrab(ctx->seat);
+#elif GTK_CHECK_VERSION(3,0,0)
     gdk_device_ungrab(ctx->keyboard, GDK_CURRENT_TIME);
 #else
     gdk_keyboard_ungrab(GDK_CURRENT_TIME);