[gtk/wip/cdavis/remove-all-funcs] gtkflowbox: Add remove_all()

[Christopher Davis <christopherdavis src gnome org>]

commit da17c8e07f6875a178832a845e818ab4e1836717
Author: Christopher Davis <christopherdavis gnome org>
Date:   Wed Sep 29 15:20:37 2021 -0700

    gtkflowbox: Add remove_all()
    
    Removing all items from containers is a common use case.
    Without this applications needed to implement this manually.
    It makes senses to handle it here.

 gtk/gtkflowbox.c | 18 ++++++++++++++++++
 gtk/gtkflowbox.h |  3 +++
 2 files changed, 21 insertions(+)
---
diff --git a/gtk/gtkflowbox.c b/gtk/gtkflowbox.c
index 188b76c562..bdde833ccc 100644
--- a/gtk/gtkflowbox.c
+++ b/gtk/gtkflowbox.c
@@ -3073,6 +3073,7 @@ gtk_flow_box_remove (GtkFlowBox *box,
   if (child == priv->active_child)
     priv->active_child = NULL;
   if (child == priv->selected_child)
+    GtkWidget *child;
     priv->selected_child = NULL;
 
   g_sequence_remove (CHILD_PRIV (child)->iter);
@@ -3085,6 +3086,23 @@ gtk_flow_box_remove (GtkFlowBox *box,
     g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);
 }
 
+/**
+ * gtk_flow_box_remove_all:
+ * @box: a `GtkFlowBox`
+ *
+ * Removes all children from @box.
+ */
+void
+gtk_flow_box_remove_all (GtkFlowBox *box)
+{
+  GtkWidget *child;
+
+  g_return_if_fail (GTK_IS_FLOW_BOX (box));
+
+  while ((child = gtk_widget_get_first_child (GTK_WIDGET (box))))
+    gtk_flow_box_remove (box, child);
+}
+
 /* Keynav {{{2 */
 
 static gboolean
diff --git a/gtk/gtkflowbox.h b/gtk/gtkflowbox.h
index 3625d18ddf..2283138206 100644
--- a/gtk/gtkflowbox.h
+++ b/gtk/gtkflowbox.h
@@ -154,6 +154,9 @@ void                  gtk_flow_box_insert                       (GtkFlowBox
 GDK_AVAILABLE_IN_ALL
 void                  gtk_flow_box_remove                       (GtkFlowBox        *box,
                                                                  GtkWidget         *widget);
+GDK_AVAILABLE_IN_ALL
+void                  gtk_flow_box_remove_all                   (GtkFlowBox        *box);
+
 GDK_AVAILABLE_IN_ALL
 GtkFlowBoxChild      *gtk_flow_box_get_child_at_index           (GtkFlowBox        *box,
                                                                  int                idx);