Support exclusive Toggles for implementing option buttons

[libs/gltk.git] / source / toggle.cpp

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