Added uiContainer, the GtkFixed equivalent for use by the GTK+ backend. Fixed up formatting of the uipriv_*.h files.

container_unix.c

@@ -0,0 +1,78 @@
+// 13 august 2014
+#include "uipriv_unix.h"
+
+G_DEFINE_TYPE(uiContainer, uiContainer, GTK_TYPE_CONTAINER)
+
+static void uiContainer_init(uiContainer *c)
+{
+	c->children = g_ptr_array_new();
+	gtk_widget_set_has_window(GTK_WIDGET(c), FALSE);
+}
+
+static void uiContainer_dispose(GObject *obj)
+{
+	g_ptr_array_unref(uiContainer(obj)->children);
+	G_OBJECT_CLASS(uiContainer_parent_class)->dispose(obj);
+}
+
+static void uiContainer_finalize(GObject *obj)
+{
+	G_OBJECT_CLASS(uiContainer_parent_class)->finalize(obj);
+}
+
+static void uiContainer_add(GtkContainer *container, GtkWidget *widget)
+{
+	gtk_widget_set_parent(widget, GTK_WIDGET(container));
+	g_ptr_array_add(uiContainer(container)->children, widget);
+}
+
+static void uiContainer_remove(GtkContainer *container, GtkWidget *widget)
+{
+	gtk_widget_unparent(widget);
+	g_ptr_array_remove(uiContainer(container)->children, widget);
+}
+
+static void uiContainer_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
+{
+	gtk_widget_set_allocation(widget, allocation);
+	// TODO resize child
+}
+
+struct forall {
+	GtkCallback callback;
+	gpointer data;
+};
+
+static void doforall(gpointer obj, gpointer data)
+{
+	struct forall *s = (struct forall *) data;
+
+	(*(s->callback))(uiContainer(obj), s->data);
+}
+
+static void uiContainer_forall(GtkContainer *container, gboolean includeInternals, GtkCallback callback, gpointer data)
+{
+	struct forall s;
+
+	s.callback = callback;
+	s.data = data;
+	g_ptr_array_foreach(uiContainer(container)->children, doforall, &s);
+}
+
+static void uiContainer_class_init(uiContainerClass *class)
+{
+	G_OBJECT_CLASS(class)->dispose = uiContainer_dispose;
+	G_OBJECT_CLASS(class)->finalize = uiContainer_finalize;
+	GTK_WIDGET_CLASS(class)->size_allocate = uiContainer_size_allocate;
+	GTK_CONTAINER_CLASS(class)->add = uiContainer_add;
+	GTK_CONTAINER_CLASS(class)->remove = uiContainer_remove;
+	GTK_CONTAINER_CLASS(class)->forall = uiContainer_forall;
+}
+
+GtkWidget *newContainer(void)
+{
+	uiContainer *c;
+
+	c = uiContainer(g_object_new(uiContainerType, NULL));
+	return GTK_WIDGET(c);
+}

uipriv_darwin.h

@@ -1,5 +1,4 @@
 // 6 january 2015
-
 #define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_7
 #define MAC_OS_X_VERSION_MAX_ALLOWED MAC_OS_X_VERSION_10_7
 #import <Cocoa/Cocoa.h>

uipriv_unix.h

@@ -1,5 +1,4 @@
 // 6 april 2015
-
 #define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_32
 #define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_32
 #define GDK_VERSION_MIN_REQUIRED GDK_VERSION_3_4
@@ -7,3 +6,23 @@
 #include <gtk/gtk.h>
 #include "uipriv.h"
 #include "ui_unix.h"
+
+// container_unix.c
+#define uiContainerType (uiContainer_get_type())
+#define uiContainer(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), uiContainerType, uiContainer))
+#define uiIsContainer(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), uiContainerType))
+#define uiContainerClass(class) (G_TYPE_CHECK_CLASS_CAST((class), uiContainerType, uiContainerClass))
+#define uiIsContainerClass(class) (G_TYPE_CHECK_CLASS_TYPE((class), uiContainer))
+#define uiGetContainerClass(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), uiContainerType, uiContainerClass))
+typedef struct uiContainer uiContainer;
+typedef struct uiContainerClass uiContainerClass;
+struct uiContainer {
+	GtkContainer parent_instance;
+	// TODO
+	GPtrArray *children;		// for forall()
+};
+struct uiContainerClass {
+	GtkContainerClass parent_class;
+};
+extern GType uiContainer_get_type(void);
+extern GtkWidget *newContainer(void);

uipriv_windows.h

@@ -1,5 +1,4 @@
 // 6 january 2015
-
 #define UNICODE
 #define _UNICODE
 #define STRICT