[PATCH 1/2] ui/gtk: enable fullscreen hotkey for detached windows

[dongwon.kim@intel.com]

From: Dongwon Kim <dongwon.kim@intel.com>

Currently, the fullscreen toggle hotkey (Ctrl+Alt+f by default) only
functions for the main QEMU window. When a Virtual Console (VC) is
detached into its own separate window (untabified), it loses this
capability.

Implement a toggle helper, gd_win_fullscreen, and connect it to
the 'f' accelerator when a detached window is created in
gd_menu_untabify. This allows individual detached windows to be
toggled fullscreen independently.

Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
---
 ui/gtk.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/ui/gtk.c b/ui/gtk.c
index a723c8215d..3c9720a330 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -1556,6 +1556,42 @@ static gboolean gd_win_grab(void *opaque)
     return TRUE;
 }
 
+static void gd_win_fullscreen(void *opaque)
+{
+    VirtualConsole *vc = opaque;
+    GtkDisplayState *s = vc->s;
+    GdkWindow *window;
+    GdkWindowState state;
+
+    if (!vc->window || !gtk_widget_get_realized(vc->window)) {
+        return;
+    }
+
+    window = gtk_widget_get_window(vc->window);
+    if (!window) {
+        return;
+    }
+
+    state = gdk_window_get_state(window);
+
+    if (state & GDK_WINDOW_STATE_FULLSCREEN) {
+        gtk_window_unfullscreen(GTK_WINDOW(vc->window));
+
+        if (vc->type == GD_VC_GFX) {
+            if (!s->free_scale) {
+                vc->gfx.scale_x = 1.0;
+                vc->gfx.scale_y = 1.0;
+            }
+            gd_update_windowsize(vc);
+        }
+    } else {
+        if (vc->type == GD_VC_GFX) {
+            gtk_widget_set_size_request(vc->gfx.drawing_area, -1, -1);
+        }
+        gtk_window_fullscreen(GTK_WINDOW(vc->window));
+    }
+}
+
 static void gd_menu_untabify(GtkMenuItem *item, void *opaque)
 {
     GtkDisplayState *s = opaque;
@@ -1590,9 +1626,13 @@ static void gd_menu_untabify(GtkMenuItem *item, void *opaque)
             GtkAccelGroup *ag = gtk_accel_group_new();
             gtk_window_add_accel_group(GTK_WINDOW(vc->window), ag);
 
-            GClosure *cb = g_cclosure_new_swap(G_CALLBACK(gd_win_grab),
-                                               vc, NULL);
-            gtk_accel_group_connect(ag, GDK_KEY_g, HOTKEY_MODIFIERS, 0, cb);
+            GClosure *cb_grab = g_cclosure_new_swap(G_CALLBACK(gd_win_grab),
+                                                    vc, NULL);
+            gtk_accel_group_connect(ag, GDK_KEY_g, HOTKEY_MODIFIERS, 0, cb_grab);
+            GClosure *cb_fullscreen = g_cclosure_new_swap(
+                                             G_CALLBACK(gd_win_fullscreen),
+                                             vc, NULL);
+            gtk_accel_group_connect(ag, GDK_KEY_f, HOTKEY_MODIFIERS, 0, cb_fullscreen);
         }
 
         gd_rebuild_vc_menu(s);
-- 
2.43.0