[Boost-commit] svn:boost r39460 - sandbox/thread_safe_signals/libs/thread_safe_signals/example

From: fmhess_at_[hidden]
Date: 2007-09-21 16:35:45

Author: fmhess
Date: 2007-09-21 16:35:45 EDT (Fri, 21 Sep 2007)
New Revision: 39460
URL: http://svn.boost.org/trac/boost/changeset/39460

Log:
Added an example program referenced in the tutorial.

Added:
   sandbox/thread_safe_signals/libs/thread_safe_signals/example/
   sandbox/thread_safe_signals/libs/thread_safe_signals/example/doc_view.cpp   (contents, props changed)

Added: sandbox/thread_safe_signals/libs/thread_safe_signals/example/doc_view.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/libs/thread_safe_signals/example/doc_view.cpp	2007-09-21 16:35:45 EDT (Fri, 21 Sep 2007)
@@ -0,0 +1,113 @@
+// Document/View sample for Boost.Signals
+// Copyright Keith MacDonald 2005. Use, modification and
+// distribution is subject to the Boost Software License, Version
+// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+// For more information, see http://www.boost.org
+
+#include <iostream>
+#include <string>
+#include <boost/signal.hpp>
+#include <boost/bind.hpp>
+
+class Document
+{
+public:
+    typedef boost::signal<void (bool)>  signal_t;
+    typedef boost::signals::connection  connection_t;
+
+public:
+    Document()
+    {}
+
+    connection_t connect(const signal_t::slot_type &subscriber)
+    {
+        return m_sig.connect(subscriber);
+    }
+
+    void disconnect(connection_t subscriber)
+    {
+        subscriber.disconnect();
+    }
+
+    void append(const char* s)
+    {
+        m_text += s;
+        m_sig(true);
+    }
+
+    const std::string& getText() const
+    {
+        return m_text;
+    }
+
+private:
+    signal_t    m_sig;
+    std::string m_text;
+};
+
+class View
+{
+public:
+    View(Document& m)
+        : m_document(m)
+    {
+        m_connection = m_document.connect(boost::bind(&View::refresh, this, _1));
+    }
+
+    virtual ~View()
+    {
+        m_document.disconnect(m_connection);
+    }
+
+    virtual void refresh(bool bExtended) const = 0;
+
+protected:
+    Document&               m_document;
+
+private:
+    Document::connection_t  m_connection;
+};
+
+class TextView : public View
+{
+public:
+    TextView(Document& doc)
+        : View(doc)
+    {}
+
+    virtual void refresh(bool bExtended) const
+    {
+        std::cout << "TextView: " << m_document.getText() << std::endl;
+    }
+};
+
+class HexView : public View
+{
+public:
+    HexView(Document& doc)
+        : View(doc)
+    {}
+
+    virtual void refresh(bool bExtended) const
+    {
+        const std::string&  s = m_document.getText();
+
+        std::cout << "HexView:";
+
+        for (std::string::const_iterator it = s.begin(); it != s.end(); ++it)
+            std::cout << ' ' << std::hex << static_cast<int>(*it);
+
+        std::cout << std::endl;
+    }
+};
+
+int main(int argc, char* argv[])
+{
+    Document    doc;
+    TextView    v1(doc);
+    HexView     v2(doc);
+
+    doc.append(argc == 2 ? argv[1] : "Hello world!");
+    return 0;
+}