Rework how widget ownership works in Container

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

diff --git a/source/panel.h b/source/panel.h
index 31be7e57c1afb530c0ef58600d69c9e31110c12b..3061032789574f168c2bb2933f787d4f439c1284 100644 (file)
--- a/source/panel.h
+++ b/source/panel.h
@@ -1,35 +1,135 @@
 #ifndef MSP_GLTK_PANEL_H_
 #define MSP_GLTK_PANEL_H_
 
-#include "widget.h"
+#include <memory>
+#include <msp/core/typeregistry.h>
+#include "container.h"
+#include "layout.h"
+#include "mspgltk_api.h"
 
 namespace Msp {
 namespace GLtk {
 
-class Panel: public Widget
+/**
+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 MSPGLTK_API Panel: public Container
 {
 public:
-       Panel(const Resources &);
-       ~Panel();
+       class Loader: public DataFile::DerivedObjectLoader<Panel, Widget::Loader>
+       {
+       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:
+               Widget &get_last_widget();
+               template<typename T>
+               void arrangement();
+               template<typename T>
+               void child(const std::string &);
+               void constraint(Layout::ConstraintType, const std::string &);
+               void expand(bool, bool);
+               void ghost(bool);
+               void gravity(int, int);
+               void grid(std::size_t);
+               void layout();
+               template<typename T>
+               void unnamed_child();
+
+               friend class Panel;
+       };
 
-       void add(Widget &);
-       void button_press(int, int, unsigned);
-       void button_release(int, int, unsigned);
-       void pointer_motion(int, int);
 private:
-       typedef std::list<Widget *> ChildSeq;
+       template<typename T>
+       class ArrangedLoader: public DataFile::Loader
+       {
+       private:
+               typename T::Loader arr_loader;
+
+       public:
+               ArrangedLoader(Loader &, T &);
+       };
+
+protected:
+       std::vector<Widget *> nav_order;
+       std::unique_ptr<Layout> layout;
+
+       static TypeRegistry<Loader::AddChildType, Loader &> widget_registry;
+       static bool widget_registry_init_done;
+
+public:
+       Panel();
+
+       template<typename T>
+       static void register_child_type(const std::string &);
+
+       const char *get_class() const override { return "panel"; }
+
+       Layout &get_or_create_layout();
 
-       ChildSeq children;
-       Widget *pointer_focus;
-       unsigned pointer_grab;
+protected:
+       void autosize_special(const Part &, Geometry &) const override;
+       void render_special(const Part &, GL::Renderer &) const override;
 
-       Panel(const Panel &);
-       Panel &operator=(const Panel &);
-       const char *get_class() const { return "panel"; }
-       void render_part(const Part &) const;
-       void set_pointer_focus(Widget *);
+public:
+       bool navigate(Navigation) override;
+protected:
+       Widget *find_next_child(int, int, int, int, int) const;
+       static int compute_delta(int, int, int, int, int);
+
+       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