[gnome-builder] layout: allow subclassing IdeLayoutPane

[Christian Hergert <chergert src gnome org>]

commit 94b31f9dde6e2a489b89ec64c7bcbb892d03508f
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jul 12 16:37:28 2017 -0700

    layout: allow subclassing IdeLayoutPane
    
    We can use this to create a custom transient panel, and also
    to reconfigure IdeEditorSidebar into a panel subclass.

 libide/layout/ide-layout-pane.c |   14 +++++++-------
 libide/layout/ide-layout-pane.h |   21 ++++++++++++++++-----
 2 files changed, 23 insertions(+), 12 deletions(-)
---
diff --git a/libide/layout/ide-layout-pane.c b/libide/layout/ide-layout-pane.c
index f1ca4ef..c3acd4b 100644
--- a/libide/layout/ide-layout-pane.c
+++ b/libide/layout/ide-layout-pane.c
@@ -23,24 +23,24 @@
 #include "ide-layout-pane.h"
 #include "ide-macros.h"
 
-struct _IdeLayoutPane
+typedef struct
 {
-  DzlDockBinEdge  parent_instance;
-  DzlDockStack   *dock_stack;
-};
+  DzlDockStack *dock_stack;
+} IdeLayoutPanePrivate;
 
-G_DEFINE_TYPE (IdeLayoutPane, ide_layout_pane, DZL_TYPE_DOCK_BIN_EDGE)
+G_DEFINE_TYPE_WITH_PRIVATE (IdeLayoutPane, ide_layout_pane, DZL_TYPE_DOCK_BIN_EDGE)
 
 static void
 ide_layout_pane_add (GtkContainer *container,
                      GtkWidget    *widget)
 {
   IdeLayoutPane *self = (IdeLayoutPane *)container;
+  IdeLayoutPanePrivate *priv = ide_layout_pane_get_instance_private (self);
 
   g_assert (IDE_IS_LAYOUT_PANE (self));
 
   if (DZL_IS_DOCK_WIDGET (widget))
-    gtk_container_add (GTK_CONTAINER (self->dock_stack), widget);
+    gtk_container_add (GTK_CONTAINER (priv->dock_stack), widget);
   else
     GTK_CONTAINER_CLASS (ide_layout_pane_parent_class)->add (container, widget);
 }
@@ -54,7 +54,7 @@ ide_layout_pane_class_init (IdeLayoutPaneClass *klass)
   container_class->add = ide_layout_pane_add;
 
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/builder/ui/ide-layout-pane.ui");
-  gtk_widget_class_bind_template_child (widget_class, IdeLayoutPane, dock_stack);
+  gtk_widget_class_bind_template_child_private (widget_class, IdeLayoutPane, dock_stack);
 }
 
 static void
diff --git a/libide/layout/ide-layout-pane.h b/libide/layout/ide-layout-pane.h
index c7ebe2f..04676b2 100644
--- a/libide/layout/ide-layout-pane.h
+++ b/libide/layout/ide-layout-pane.h
@@ -16,8 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_LAYOUT_PANE_H
-#define IDE_LAYOUT_PANE_H
+#pragma once
 
 #include <dazzle.h>
 
@@ -25,8 +24,20 @@ G_BEGIN_DECLS
 
 #define IDE_TYPE_LAYOUT_PANE (ide_layout_pane_get_type())
 
-G_DECLARE_FINAL_TYPE (IdeLayoutPane, ide_layout_pane, IDE, LAYOUT_PANE, DzlDockBinEdge)
+G_DECLARE_DERIVABLE_TYPE (IdeLayoutPane, ide_layout_pane, IDE, LAYOUT_PANE, DzlDockBinEdge)
 
-G_END_DECLS
+struct _IdeLayoutPaneClass
+{
+  DzlDockBinEdgeClass parent_class;
+
+  gpointer _reserved1;
+  gpointer _reserved2;
+  gpointer _reserved3;
+  gpointer _reserved4;
+  gpointer _reserved5;
+  gpointer _reserved6;
+  gpointer _reserved7;
+  gpointer _reserved8;
+};
 
-#endif /* IDE_LAYOUT_PANE_H */
+G_END_DECLS