From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 9 Oct 2008 21:06:13 +0000 (+0000)
Subject: Support exclusive Toggles for implementing option buttons
X-Git-Tag: 1.0~4
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgltk.git;a=commitdiff_plain;h=30780ba31be92c977a68a2a9103eeba87747d530

Support exclusive Toggles for implementing option buttons
---

diff --git a/source/panel.h b/source/panel.h
index 397d71f..e269ca2 100644
--- 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 dd6ce35..8c727d6 100644
--- 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 f01f84b..bdb1b31 100644
--- 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