Add a Layout class to automatically position widgets within a Panel

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

diff --git a/source/panel.h b/source/panel.h
index 54e75ef5309e9e23d62645fadaf5064cafa7fddb..a5483c452c57f7b0d639511878fb8a8ef2f4b8d6 100644 (file)
--- a/source/panel.h
+++ b/source/panel.h
@@ -13,6 +13,8 @@ Distributed under the LGPL
 namespace Msp {
 namespace GLtk {
 
+class Layout;
+
 /**
 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
@@ -45,12 +47,14 @@ protected:
                virtual ~Child();
 
                void visibility_changed(bool);
+               void autosize_changed();
                void request_focus();
                void grab_pointer();
                void ungrab_pointer();
                void raise();
        };
 
+       Layout *layout;
        Widget *pointer_focus;
        bool pointer_grabbed;
        Widget *input_focus;
@@ -59,9 +63,12 @@ protected:
        Panel &operator=(const Panel &);
 public:
        Panel();
+       virtual ~Panel();
 
        virtual const char *get_class() const { return "panel"; }
 
+       void set_layout(Layout *);
+
 protected:
        virtual Child *create_child(Widget *);
 
@@ -81,8 +88,10 @@ public:
        virtual void key_press(unsigned, unsigned, wchar_t);
        virtual void key_release(unsigned, unsigned);
        virtual void focus_out();
-
 protected:
+       virtual void on_child_added(Widget &);
+       virtual void on_child_removed(Widget &);
+
        void set_pointer_focus(Widget *);
        void set_input_focus(Widget *);
 };