Rework how widget ownership works in Container

[libs/gltk.git] / source / panel.h

diff --git a/source/panel.h b/source/panel.h
index 2bc7a5ffdfa01ff7ce80af7a16f67d3afb54e1b4..3061032789574f168c2bb2933f787d4f439c1284 100644 (file)
--- a/source/panel.h
+++ b/source/panel.h
@@ -1,8 +1,11 @@
 #ifndef MSP_GLTK_PANEL_H_
 #define MSP_GLTK_PANEL_H_
 
+#include <memory>
+#include <msp/core/typeregistry.h>
 #include "container.h"
 #include "layout.h"
+#include "mspgltk_api.h"
 
 namespace Msp {
 namespace GLtk {
@@ -12,7 +15,7 @@ Panels are containers for other widgets.  Panel styles should have a special
 part "children" to render the child widgets.  All properties of this part are
 ignored.
 */
-class Panel: public Container
+class MSPGLTK_API Panel: public Container
 {
 public:
        class Loader: public DataFile::DerivedObjectLoader<Panel, Widget::Loader>
@@ -21,13 +24,19 @@ public:
                typedef std::map<std::string, Widget *> WidgetMap;
 
        protected:
+               template<typename T>
+               struct AddChildType
+               {
+                       void operator()(const std::string &, Loader &) const;
+               };
+
                WidgetMap &wdg_map;
                Widget *last_widget;
 
        public:
                Loader(Panel &, WidgetMap &);
+
        private:
-               Layout &get_layout();
                Widget &get_last_widget();
                template<typename T>
                void arrangement();
@@ -37,9 +46,12 @@ public:
                void expand(bool, bool);
                void ghost(bool);
                void gravity(int, int);
-               void grid(unsigned);
+               void grid(std::size_t);
                void layout();
-               void panel(const std::string &);
+               template<typename T>
+               void unnamed_child();
+
+               friend class Panel;
        };
 
 private:
@@ -54,34 +66,70 @@ private:
        };
 
 protected:
-       Layout *layout;
+       std::vector<Widget *> nav_order;
+       std::unique_ptr<Layout> layout;
+
+       static TypeRegistry<Loader::AddChildType, Loader &> widget_registry;
+       static bool widget_registry_init_done;
 
-       Panel(const Panel &);
-       Panel &operator=(const Panel &);
 public:
        Panel();
-       virtual ~Panel();
 
-       virtual const char *get_class() const { return "panel"; }
+       template<typename T>
+       static void register_child_type(const std::string &);
+
+       const char *get_class() const override { return "panel"; }
 
-       void set_layout(Layout *);
-       Layout *get_layout() { return layout; }
+       Layout &get_or_create_layout();
 
 protected:
-       virtual void autosize_special(const Part &, Geometry &) const;
-       virtual void render_special(const Part &, GL::Renderer &) const;
+       void autosize_special(const Part &, Geometry &) const override;
+       void render_special(const Part &, GL::Renderer &) const override;
 
 public:
-       virtual bool navigate(Navigation);
+       bool navigate(Navigation) override;
 protected:
        Widget *find_next_child(int, int, int, int, int) const;
        static int compute_delta(int, int, int, int, int);
 
-       virtual void on_geometry_change();
-       virtual void on_child_added(Widget &);
-       virtual void on_child_removed(Widget &);
+       void on_size_change() override;
+       void on_child_added(Widget &) override;
+       void on_child_removed(Widget &) override;
 };
 
+
+template<typename T>
+void Panel::register_child_type(const std::string &name)
+{
+       widget_registry.register_type<T>(name);
+}
+
+
+template<typename T>
+void Panel::Loader::child(const std::string &n)
+{
+       unnamed_child<T>();
+       wdg_map[n] = last_widget;
+}
+
+template<typename T>
+void Panel::Loader::unnamed_child()
+{
+       std::unique_ptr<T> chl = std::make_unique<T>();
+       load_sub(*chl);
+       Widget *wdg = chl.get();
+       obj.add(move(chl));
+       last_widget = wdg;
+}
+
+
+template<typename T>
+void Panel::Loader::AddChildType<T>::operator()(const std::string &kwd, Loader &ldr) const
+{
+       ldr.add(kwd, &Loader::child<T>);
+       ldr.add(kwd, &Loader::unnamed_child<T>);
+}
+
 } // namespace GLtk
 } // namespace Msp