[gtk/active-media-controls: 1/3] scalebutton: Add an active property

[Matthias Clasen <matthiasc src gnome org>]

commit 116eb992c13b32c7deda2fc6f87bca06f89ee113
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Apr 28 01:15:29 2020 -0400

    scalebutton: Add an active property
    
    This is set to TRUE while the popup is visible.
    We will use it to prevent the button from being
    hidden while the user is interacting with it.

 gtk/gtkscalebutton.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkscalebutton.c b/gtk/gtkscalebutton.c
index 809e790857..896683f2ea 100644
--- a/gtk/gtkscalebutton.c
+++ b/gtk/gtkscalebutton.c
@@ -98,7 +98,8 @@ enum
   PROP_VALUE,
   PROP_SIZE,
   PROP_ADJUSTMENT,
-  PROP_ICONS
+  PROP_ICONS,
+  PROP_ACTIVE
 };
 
 typedef struct
@@ -248,6 +249,13 @@ gtk_scale_button_class_init (GtkScaleButtonClass *klass)
                                                        G_TYPE_STRV,
                                                        GTK_PARAM_READWRITE));
 
+  g_object_class_install_property (gobject_class,
+                                   PROP_ACTIVE,
+                                   g_param_spec_boolean ("active",
+                                                         P_("Active"),
+                                                         P_("Active"),
+                                                         FALSE,
+                                                         G_PARAM_READABLE));
   /**
    * GtkScaleButton::value-changed:
    * @button: the object which received the signal
@@ -403,6 +411,14 @@ gtk_scale_button_closed (GtkScaleButton *button)
   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button), FALSE);
 }
 
+static void
+notify_active (GObject    *object,
+               GParamSpec *pspec,
+               GObject    *button)
+{
+  g_object_notify (button, "active");
+}
+
 static void
 gtk_scale_button_init (GtkScaleButton *button)
 {
@@ -416,6 +432,9 @@ gtk_scale_button_init (GtkScaleButton *button)
   gtk_widget_init_template (GTK_WIDGET (button));
   gtk_widget_set_parent (priv->dock, GTK_WIDGET (button));
 
+  g_signal_connect (priv->dock, "notify::visible",
+                    G_CALLBACK (notify_active), button);
+
   /* Need a local reference to the adjustment */
   priv->adjustment = gtk_adjustment_new (0, 0, 100, 2, 20, 0);
   g_object_ref_sink (priv->adjustment);
@@ -503,6 +522,9 @@ gtk_scale_button_get_property (GObject     *object,
     case PROP_ICONS:
       g_value_set_boxed (value, priv->icon_list);
       break;
+    case PROP_ACTIVE:
+      g_value_set_boolean (value, gtk_widget_get_visible (priv->dock));
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;