Support exclusive Toggles for implementing option buttons

diff --git a/source/panel.h b/source/panel.h
index 397d71fc3974adac96bedec9763a32e283141d24..e269ca21819748185e2574758b459f8c532fb4b5 100644 (file)
--- a/source/panel.h
+++ b/source/panel.h
@@ -49,6 +49,7 @@ public:
 
        void add(Widget &);
        void remove(Widget &);
+       const std::list<Widget *> &get_children() const { return children; }
        void raise(Widget &);
        void set_focus(Widget &);
 

diff --git a/source/toggle.cpp b/source/toggle.cpp
index dd6ce359cad95ef691884b1e67128fcebafb81be..8c727d6c333e023e03bc77c113fbd921dabb5bde 100644 (file)
--- a/source/toggle.cpp
+++ b/source/toggle.cpp
@@ -5,25 +5,45 @@ Copyright © 2007  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
+#include "panel.h"
 #include "part.h"
 #include "toggle.h"
 
+using namespace std;
+
 namespace Msp {
 namespace GLtk {
 
 Toggle::Toggle(const Resources &r):
        Widget(r),
        pressed(false),
-       value(false)
+       value(false),
+       exclusive(false)
 {
        update_style();
 }
 
+void Toggle::set_text(const string &t)
+{
+       text=t;
+}
+
+void Toggle::set_exclusive(bool e)
+{
+       exclusive=e;
+       if(exclusive && value)
+               exclude_siblings();
+}
+
 void Toggle::set_value(bool v)
 {
        value=v;
        if(value)
+       {
                state|=ACTIVE;
+               if(exclusive && parent)
+                       exclude_siblings();
+       }
        else
                state&=~ACTIVE;
 }
@@ -54,12 +74,22 @@ void Toggle::render_special(const Part &part) const
                render_text(part, text);
 }
 
+void Toggle::exclude_siblings()
+{
+       const list<Widget *> &siblings=parent->get_children();
+       for(list<Widget *>::const_iterator i=siblings.begin(); i!=siblings.end(); ++i)
+               if(Toggle *tgl=dynamic_cast<Toggle *>(*i))
+                       if(tgl!=this && tgl->get_exclusive() && tgl->get_value())
+                               tgl->set_value(false);
+}
+
 
 Toggle::Loader::Loader(Toggle &t):
        Widget::Loader(t)
 {
-       add("text",  &Toggle::text);
-       add("value", &Toggle::value);
+       add("exclusive", &Toggle::exclusive);
+       add("text",      &Toggle::text);
+       add("value",     &Toggle::value);
 }
 
 Toggle &Toggle::Loader::get_object() const

diff --git a/source/toggle.h b/source/toggle.h
index f01f84bd0ba632c8596f80d1fdbce5f66b0c2907..bdb1b31c42808e2a2bb6e4b4bc3b67912a125837 100644 (file)
--- a/source/toggle.h
+++ b/source/toggle.h
@@ -33,12 +33,16 @@ private:
        std::string text;
        bool pressed;
        bool value;
+       bool exclusive;
 
 public:
        sigc::signal<void, bool> signal_toggled;
 
        Toggle(const Resources &);
 
+       void set_text(const std::string &);
+       void set_exclusive(bool);
+       bool get_exclusive() const { return exclusive; }
        void set_value(bool);
        bool get_value() const { return value; }
 
@@ -47,6 +51,8 @@ public:
 private:
        virtual const char *get_class() const { return "toggle"; }
        virtual void render_special(const Part &) const;
+
+       void exclude_siblings();
 };
 
 } // namespace GLtk