[virt-tools-list] [PATCH virt-viewer] Relax Gtk+ requirement slightly

[Jonathon Jongsma]

We previously bumped the gtk+ requirement to 3.18 for the function
gtk_window_fullscreen_on_monitor(). But this function is only necessary
in Wayland. So add some preprocessor version checks to allow it to
compile on older distributions if they don't care about wayland support.
---
 configure.ac             | 4 ++--
 src/virt-viewer-window.c | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 55aa2fa..bfbf27d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,8 +17,8 @@ GLIB2_REQUIRED="2.40"
 GLIB2_ENCODED_VERSION="GLIB_VERSION_2_40"
 
 # Keep these two definitions in agreement.
-GTK_REQUIRED="3.18"
-GTK_ENCODED_VERSION="GDK_VERSION_3_18"
+GTK_REQUIRED="3.12"
+GTK_ENCODED_VERSION="GDK_VERSION_3_12"
 
 LIBXML2_REQUIRED="2.6.0"
 LIBVIRT_REQUIRED="0.10.0"
diff --git a/src/virt-viewer-window.c b/src/virt-viewer-window.c
index aace0f8..8e2589d 100644
--- a/src/virt-viewer-window.c
+++ b/src/virt-viewer-window.c
@@ -525,6 +525,7 @@ virt_viewer_window_enter_fullscreen(VirtViewerWindow *self, gint monitor)
     }
     virt_viewer_window_move_to_monitor(self);
 
+#if GTK_CHECK_VERSION(3, 18, 0)
     if (monitor == -1) {
         // just go fullscreen on the current monitor
         gtk_window_fullscreen(GTK_WINDOW(priv->window));
@@ -532,6 +533,9 @@ virt_viewer_window_enter_fullscreen(VirtViewerWindow *self, gint monitor)
         gtk_window_fullscreen_on_monitor(GTK_WINDOW(priv->window),
                                          gdk_screen_get_default(), monitor);
     }
+#else
+        gtk_window_fullscreen(GTK_WINDOW(priv->window));
+#endif /* GTK_CHECK_VERSION */
 }
 
 #define MAX_KEY_COMBO 4
-- 
2.17.2