[gtk+] gdk: Add a GdkWindow::state property

[Matthias Clasen <matthiasc src gnome org>]

commit e5b18671185178103ca0c0cbb4ec45ed32bd94e5
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Dec 14 18:51:38 2017 -0500

    gdk: Add a GdkWindow::state property
    
    This will eventually replace the window state event.

 gdk/gdkevents.c |    1 +
 gdk/gdkwindow.c |   20 +++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkevents.c b/gdk/gdkevents.c
index db702b2..32da413 100644
--- a/gdk/gdkevents.c
+++ b/gdk/gdkevents.c
@@ -2013,6 +2013,7 @@ _gdk_set_window_state (GdkWindow      *window,
     case GDK_WINDOW_TOPLEVEL:
     case GDK_WINDOW_TEMP: /* ? */
       gdk_display_put_event (display, temp_event);
+      g_object_notify (G_OBJECT (window), "state");
       break;
     case GDK_WINDOW_FOREIGN:
     case GDK_WINDOW_ROOT:
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index e6f9fa3..931079d 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -100,6 +100,7 @@ enum {
   PROP_0,
   PROP_CURSOR,
   PROP_DISPLAY,
+  PROP_STATE,
   LAST_PROP
 };
 
@@ -275,6 +276,13 @@ gdk_window_class_init (GdkWindowClass *klass)
                            GDK_TYPE_DISPLAY,
                            G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
 
+  properties[PROP_STATE] =
+      g_param_spec_flags ("state",
+                          P_("State"),
+                          P_("State"),
+                          GDK_TYPE_WINDOW_STATE, GDK_WINDOW_STATE_WITHDRAWN,
+                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
   g_object_class_install_properties (object_class, LAST_PROP, properties);
 
   /**
@@ -435,6 +443,10 @@ gdk_window_get_property (GObject    *object,
       g_value_set_object (value, window->display);
       break;
 
+    case PROP_STATE:
+      g_value_set_flags (value, window->state);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -1345,6 +1357,8 @@ _gdk_window_destroy_hierarchy (GdkWindow *window,
              cairo_region_destroy (window->clip_region);
              window->clip_region = NULL;
            }
+
+          g_object_notify_by_pspec (G_OBJECT (window), properties[PROP_STATE]);
        }
       break;
     }
@@ -3343,6 +3357,7 @@ gdk_window_show_internal (GdkWindow *window, gboolean raise)
   else
     {
       window->state = 0;
+      g_object_notify_by_pspec (G_OBJECT (window), properties[PROP_STATE]);
     }
 
   did_show = _gdk_window_update_viewable (window);
@@ -3622,7 +3637,10 @@ gdk_window_hide (GdkWindow *window)
                                     GDK_WINDOW_STATE_WITHDRAWN);
     }
   else if (was_mapped)
-    window->state = GDK_WINDOW_STATE_WITHDRAWN;
+    {
+      window->state = GDK_WINDOW_STATE_WITHDRAWN;
+      g_object_notify_by_pspec (G_OBJECT (window), properties[PROP_STATE]);
+    }
 
   if (was_mapped)
     {