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Subject: [Boost-commit] svn:boost r51039 - in sandbox/thread_safe_signals/trunk/libs/signals2: doc example
From: fmhess_at_[hidden]
Date: 2009-02-05 17:10:15

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Author: fmhess
Date: 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
New Revision: 51039
URL: http://svn.boost.org/trac/boost/changeset/51039

Log:
Added a bunch of example programs extracted from tutorial.

Added:
   sandbox/thread_safe_signals/trunk/libs/signals2/doc/examples.xml (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/custom_combiners.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/disconnect_and_block.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/hello_world_multi_slot.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/hello_world_slot.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/ordering_slots.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/passing_slots.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/signal_return_value.cpp (contents, props changed)
   sandbox/thread_safe_signals/trunk/libs/signals2/example/slot_arguments.cpp (contents, props changed)
Text files modified:
   sandbox/thread_safe_signals/trunk/libs/signals2/doc/Makefile | 1 +
   sandbox/thread_safe_signals/trunk/libs/signals2/doc/signals.xml | 1 +
   sandbox/thread_safe_signals/trunk/libs/signals2/doc/tutorial.xml | 19 +++++++++++++------
   sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm.cpp | 2 +-
   sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm_deconstruct.cpp | 2 +-
   5 files changed, 17 insertions(+), 8 deletions(-)

Modified: sandbox/thread_safe_signals/trunk/libs/signals2/doc/Makefile
==============================================================================
--- sandbox/thread_safe_signals/trunk/libs/signals2/doc/Makefile (original)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/doc/Makefile 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -4,6 +4,7 @@
BOOSTBOOK_TOOL_DIR=$(BOOST_SRC_DIR)/tools/boostbook

XML_SRCS=\
+ examples.xml \
         faq.xml \
         introduction.xml \
         porting.xml \

Added: sandbox/thread_safe_signals/trunk/libs/signals2/doc/examples.xml
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/doc/examples.xml 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,167 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE section PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
+ "http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
+<section last-revision="$Date: 2007-06-12 14:01:23 -0400 (Tue, 12 Jun 2007) $" id="signals2.examples">
+ <title>Example programs</title>
+
+ <using-namespace name="boost"/>
+ <using-namespace name="boost::signals2"/>
+
+ <section id="signals2.examples.misc">
+ <title>Miscellaneous</title>
+ <section id="signals2.examples.tutorial.hello_world_slot">
+ <title>hello_world_slot</title>
+ <para>
+ This is a basic example of connecting a slot to a signal
+ and then invoking the signal.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/hello_world_slot.cpp">hello_world_slot.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.hello_world_multi_slot">
+ <title>hello_world_multi_slot</title>
+ <para>
+ This extends the hello_world_slot example slightly by connecting more than one
+ slot to the signal before invoking it.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/hello_world_multi_slot.cpp">hello_world_multi_slot.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.ordering_slots">
+ <title>ordering_slots</title>
+ <para>
+ This extends the hello_world_multi_slot example slightly by
+ using slot groups to specify
+ the order slots should be invoked.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/ordering_slots.cpp">ordering_slots.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.slot_arguments">
+ <title>slot_arguments</title>
+ <para>
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/slot_arguments.cpp">slot_arguments.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.signal_return_value">
+ <title>signal_return_value</title>
+ <para>
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/signal_return_value.cpp">signal_return_value.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.custom_combiners">
+ <title>custom_combiners</title>
+ <para>
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/custom_combiners.cpp">custom_combiners.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.disconnect_and_block">
+ <title>disconnect_and_block</title>
+ <para>
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/disconnect_and_block.cpp">disconnect_and_block.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.tutorial.passing_slots">
+ <title>passing_slots</title>
+ <para>
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/passing_slots.cpp">passing_slots.cpp</ulink>.
+ </para>
+ </section>
+ </section>
+ <section id="signals2.examples.document-view">
+ <title>Document-View</title>
+ <section id="signals2.examples.document-view.doc_view">
+ <title>doc_view</title>
+ <para>
+ This is the document-view example program which is described in the
+ <link linkend="signals2.tutorial.document-view">tutorial</link>. It shows
+ usage of a signal and slots to implement two different views of
+ a text document.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/doc_view.cpp">doc_view.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.document-view.doc_view_acm">
+ <title>doc_view_acm</title>
+ <para>
+ This program modifies the original doc_view.cpp example to employ
+ automatic connection management.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/doc_view_acm.cpp">doc_view_acm.cpp</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.document-view.doc_view_acm_deconstruct">
+ <title>doc_view_acm_deconstruct</title>
+ <para>
+ This program modifies the doc_view_acm.cpp example to use postconstructors
+ and the <functionname>deconstruct()</functionname> factory function.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/doc_view_acm_deconstruct.cpp">doc_view_acm_deconstruct.cpp</ulink>.
+ </para>
+ </section>
+ </section>
+ <section id="signals2.examples.deconstruct">
+ <title>Postconstructors and Predestructors with <functionname>deconstruct()</functionname></title>
+ <section id="signals2.examples.deconstruct.postconstructor_ex1">
+ <title>postconstructor_ex1</title>
+ <para>
+ This program is a basic example of how to define a class with a postconstructor which
+ uses <functionname>deconstruct()</functionname> as its factory function.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/postconstructor_ex1.cpp">postconstructor_ex1</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.deconstruct.postconstructor_ex2">
+ <title>postconstructor_ex2</title>
+ <para>
+ This program extends the postconstructor_ex1 example slightly, by additionally passing arguments from
+ the <functionname>deconstruct()</functionname> call through to the class' constructor
+ and postconstructor.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/postconstructor_ex2.cpp">postconstructor_ex2</ulink>.
+ </para>
+ </section>
+ <section id="signals2.examples.deconstruct.predestructor_example">
+ <title>predestructor_example</title>
+ <para>
+ This program is a basic example of how to define a class with a predestructor which
+ uses <functionname>deconstruct()</functionname> as its factory function.
+ </para>
+ <para>
+ 
+ Download <ulink url="../../../../libs/signals2/example/predestructor_example.cpp">predestructor_example</ulink>.
+ </para>
+ </section>
+ </section>
+</section>

Modified: sandbox/thread_safe_signals/trunk/libs/signals2/doc/signals.xml
==============================================================================
--- sandbox/thread_safe_signals/trunk/libs/signals2/doc/signals.xml (original)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/doc/signals.xml 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -45,6 +45,7 @@
<title>Boost.Signals2</title>
   <xi:include href="introduction.xml"/>
   <xi:include href="tutorial.xml"/>
+ <xi:include href="examples.xml"/>
   <xi:include href="reference/reference.xml"/>
   <xi:include href="thread_safety.xml"/>
   <xi:include href="faq.xml"/>

Modified: sandbox/thread_safe_signals/trunk/libs/signals2/doc/tutorial.xml
==============================================================================
--- sandbox/thread_safe_signals/trunk/libs/signals2/doc/tutorial.xml (original)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/doc/tutorial.xml 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -240,9 +240,16 @@
<code>boost::signals2::at_front</code> or <code>boost::signals2::at_back</code>
as the last parameter to <code><methodname
alt="boost::signals2::signalN::connect">connect</methodname></code>, respectively), and defaults to the end of the list. When
-a group is specified, the final parameter describes where the slot
-will be placed within the group ordering. If we add a new slot
-to our example like this:</para>
+a group is specified, the final <code>at_front</code> or <code>at_back</code>
+parameter describes where the slot
+will be placed within the group ordering. Ungrouped slots connected with
+<code>at_front</code> will always precede all grouped slots. Ungrouped
+slots connected with <code>at_back</code> will always succeed all
+grouped slots.
+</para>
+<para>
+ If we add a new slot to our example like this:
+</para>
<programlisting>
struct GoodMorning
{
@@ -1006,7 +1013,7 @@
</section>
</section>

-<section>
+<section id="signals2.tutorial.document-view">
   <title>Example: Document-View</title>

   <para>Signals can be used to implement flexible Document-View
@@ -1139,8 +1146,8 @@
}</programlisting>

   <para>The complete example source, contributed by Keith MacDonald,
- is available in <ulink
- url="../../libs/signals/example/doc_view.cpp"><code>libs/signals/example/doc_view.cpp</code></ulink>.</para>
+ is available in the <link linkend="signals2.examples.document-view">examples</link> section.
+ </para>
</section>

   <section id="signals2.tutorial.extended-slot-type">

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/custom_combiners.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/custom_combiners.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,101 @@
+// Example program showing signals with custom combiners.
+//
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+#include <vector>
+
+float product(float x, float y) { return x * y; }
+float quotient(float x, float y) { return x / y; }
+float sum(float x, float y) { return x + y; }
+float difference(float x, float y) { return x - y; }
+
+// combiner which returns the maximum value returned by all slots
+template<typename T>
+struct maximum
+{
+ typedef T result_type;
+
+ template<typename InputIterator>
+ T operator()(InputIterator first, InputIterator last) const
+ {
+ // If there are no slots to call, just return the
+ // default-constructed value
+ if(first == last ) return T();
+ T max_value = *first++;
+ while (first != last) {
+ if (max_value < *first)
+ max_value = *first;
+ ++first;
+ }
+
+ return max_value;
+ }
+};
+
+void maximum_combiner_example()
+{
+ // signal which uses our custom "maximum" combiner
+ boost::signals2::signal<float (float x, float y), maximum<float> > sig;
+
+ sig.connect(&product);
+ sig.connect(&quotient);
+ sig.connect(&sum);
+ sig.connect(&difference);
+
+ // Outputs the maximum value returned by the connected slots, in this case
+ // 15 from the product function.
+ std::cout << "maximum: " << sig(5, 3) << std::endl;
+}
+
+// aggregate_values is a combiner which places all the values returned
+// from slots into a container
+template<typename Container>
+struct aggregate_values
+{
+ typedef Container result_type;
+
+ template<typename InputIterator>
+ Container operator()(InputIterator first, InputIterator last) const
+ {
+ Container values;
+
+ while(first != last) {
+ values.push_back(*first);
+ ++first;
+ }
+ return values;
+ }
+};
+
+void aggregate_values_example()
+{
+ // signal which uses aggregate_values as its combiner
+ boost::signals2::signal<float (float, float),
+ aggregate_values<std::vector<float> > > sig;
+
+ sig.connect(&quotient);
+ sig.connect(&product);
+ sig.connect(&sum);
+ sig.connect(&difference);
+
+ std::vector<float> results = sig(5, 3);
+ std::cout << "aggregate values: ";
+ std::copy(results.begin(), results.end(),
+ std::ostream_iterator<float>(std::cout, " "));
+ std::cout << "\n";
+}
+
+int main()
+{
+ maximum_combiner_example();
+ aggregate_values_example();
+};

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/disconnect_and_block.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/disconnect_and_block.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,105 @@
+// Various simple examples involving disconnecting and blocking slots.
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+struct HelloWorld
+{
+ void operator()() const
+ {
+ std::cout << "Hello, World!" << std::endl;
+ }
+};
+
+void disconnect_example()
+{
+ boost::signals2::signal<void ()> sig;
+
+ boost::signals2::connection c = sig.connect(HelloWorld());
+ // c is connected
+ std::cout << "c.connected() is " << c.connected() << ".\n";
+ sig(); // Prints "Hello, World!"
+
+ c.disconnect(); // Disconnect the HelloWorld object
+ std::cout << "c.connected() is " << c.connected() << ".\n";
+ sig(); // Does nothing: there are no connected slots
+}
+
+void block_example()
+{
+ boost::signals2::signal<void ()> sig;
+
+ boost::signals2::connection c = sig.connect(HelloWorld());
+ // connection is not blocked
+ std::cout << "c.blocked() is " << c.blocked() << ".\n";
+ sig(); // Prints "Hello, World!"
+
+ {
+ boost::signals2::shared_connection_block block(c); // block the slot
+ std::cout << "c.blocked() is " << c.blocked() << ".\n";
+ sig(); // No output: the slot is blocked
+ } // shared_connection_block going out of scope unblocks the slot
+ std::cout << "c.blocked() is " << c.blocked() << ".\n";
+ sig(); // Prints "Hello, World!"}
+}
+
+struct ShortLived
+{
+ void operator()() const
+ {
+ std::cout << "Life is short!" << std::endl;
+ }
+};
+
+void scoped_connection_example()
+{
+ boost::signals2::signal<void ()> sig;
+
+ {
+ boost::signals2::scoped_connection c(sig.connect(ShortLived()));
+ sig(); // will call ShortLived function object
+ } // scoped_connection goes out of scope and disconnects
+
+ sig(); // ShortLived function object no longer connected to sig
+}
+
+void foo() { std::cout << "foo"; }
+void bar() { std::cout << "bar\n"; }
+
+void disconnect_by_slot_example()
+{
+ boost::signals2::signal<void()> sig;
+
+ sig.connect(&foo);
+ sig.connect(&bar);
+ sig();
+
+ // disconnects foo, but not bar
+ sig.disconnect(&foo);
+ sig();
+}
+
+int main()
+{
+ std::cout << "Disconnect example:\n";
+ disconnect_example();
+
+ std::cout << "\nBlock example:\n";
+ block_example();
+
+ std::cout << "\nScoped connection example:\n";
+ scoped_connection_example();
+
+ std::cout << "\nDisconnect by slot example:\n";
+ disconnect_by_slot_example();
+
+ return 0;
+};

Modified: sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm.cpp
==============================================================================
--- sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm.cpp (original)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -1,4 +1,4 @@
-// Document/View sample for Boost.Signals.
+// Document/View sample for Boost.Signals2.
// Expands on doc_view.cpp example by using automatic
// connection management.
//

Modified: sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm_deconstruct.cpp
==============================================================================
--- sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm_deconstruct.cpp (original)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/doc_view_acm_deconstruct.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -1,4 +1,4 @@
-// Document/View sample for Boost.Signals.
+// Document/View sample for Boost.Signals2.
// Expands on doc_view_acm.cpp example by using boost::signals2::deconstruct
// as a post-constructing factory function.
//

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/hello_world_multi_slot.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/hello_world_multi_slot.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,40 @@
+// Multiple slot hello world example for Boost.Signals2
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+struct Hello
+{
+ void operator()() const
+ {
+ std::cout << "Hello";
+ }
+};
+
+struct World
+{
+ void operator()() const
+ {
+ std::cout << ", World!" << std::endl;
+ }
+};
+
+int main()
+{
+ boost::signals2::signal<void ()> sig;
+
+ sig.connect(Hello());
+ sig.connect(World());
+
+ sig();
+
+ return 0;
+};

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/hello_world_slot.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/hello_world_slot.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,35 @@
+// Beginner hello world example for Boost.Signals2
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+struct HelloWorld
+{
+ void operator()() const
+ {
+ std::cout << "Hello, World!" << std::endl;
+ }
+};
+
+int main()
+{
+ // Signal with no arguments and a void return value
+ boost::signals2::signal<void ()> sig;
+
+ // Connect a HelloWorld slot
+ HelloWorld hello;
+ sig.connect(hello);
+
+ // Call all of the slots
+ sig();
+
+ return 0;
+};

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/ordering_slots.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/ordering_slots.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,54 @@
+// Ordered slots hello world example for Boost.Signals2
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+struct Hello
+{
+ void operator()() const
+ {
+ std::cout << "Hello";
+ }
+};
+
+struct World
+{
+ void operator()() const
+ {
+ std::cout << ", World!" << std::endl;
+ }
+};
+
+struct GoodMorning
+{
+ void operator()() const
+ {
+ std::cout << "... and good morning!" << std::endl;
+ }
+};
+
+int main()
+{
+ boost::signals2::signal<void ()> sig;
+
+ sig.connect(1, World()); // connect with group 1
+ sig.connect(0, Hello()); // connect with group 0
+ // by default slots are connected at the end of the slot list
+ sig.connect(GoodMorning());
+
+ // slots are invoked this order:
+ // 1) ungrouped slots connected with boost::signals2::at_front
+ // 2) grouped slots according to ordering of their groups
+ // 3) ungrouped slots connected with boost::signals2::at_back
+ sig();
+
+ return 0;
+};

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/passing_slots.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/passing_slots.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,47 @@
+// Example program showing passing of slots through an interface.
+//
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+// a pretend GUI button
+class Button
+{
+ typedef boost::signals2::signal<void (int x, int y)> OnClick;
+public:
+ typedef OnClick::slot_type OnClickSlotType;
+ // forward slots through Button interface to its private signal
+ boost::signals2::connection doOnClick(const OnClickSlotType & slot)
+ {
+ return onClick.connect(slot);
+ }
+
+ // simulate user clicking on GUI button at coordinates 52, 38
+ void simulateClick()
+ {
+ onClick(52, 38);
+ }
+private:
+ OnClick onClick;
+};
+
+void printCoordinates(long x, long y)
+{
+ std::cout << "(" << x << ", " << y << ")\n";
+}
+
+int main()
+{
+ Button button;
+ button.doOnClick(&printCoordinates);
+ button.simulateClick();
+ return 0;
+}

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/signal_return_value.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/signal_return_value.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,33 @@
+// Example program for returning a value from slots to signal invocation.
+//
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+float product(float x, float y) { return x * y; }
+float quotient(float x, float y) { return x / y; }
+float sum(float x, float y) { return x + y; }
+float difference(float x, float y) { return x - y; }
+
+int main()
+{
+ boost::signals2::signal<float (float x, float y)> sig;
+
+ sig.connect(&product);
+ sig.connect(&quotient);
+ sig.connect(&sum);
+ sig.connect(&difference);
+
+ // The default combiner returns a boost::optional containing the return
+ // value of the last slot in the slot list, in this case the
+ // difference function.
+ std::cout << *sig(5, 3) << std::endl;
+};

Added: sandbox/thread_safe_signals/trunk/libs/signals2/example/slot_arguments.cpp
==============================================================================
--- (empty file)
+++ sandbox/thread_safe_signals/trunk/libs/signals2/example/slot_arguments.cpp 2009-02-05 17:10:13 EST (Thu, 05 Feb 2009)
@@ -0,0 +1,52 @@
+// Example program for passing arguments from signal invocations to slots.
+//
+// Copyright Douglas Gregor 2001-2004.
+// Copyright Frank Mori Hess 2009.
+//
+// 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 <boost/signals2/signal.hpp>
+
+void print_args(float x, float y)
+{
+ std::cout << "The arguments are " << x << " and " << y << std::endl;
+}
+
+void print_sum(float x, float y)
+{
+ std::cout << "The sum is " << x + y << std::endl;
+}
+
+void print_product(float x, float y)
+{
+ std::cout << "The product is " << x * y << std::endl;
+}
+
+void print_difference(float x, float y)
+{
+ std::cout << "The difference is " << x - y << std::endl;
+}
+
+void print_quotient(float x, float y)
+{
+ std::cout << "The quotient is " << x / y << std::endl;
+}
+
+int main()
+{
+ boost::signals2::signal<void (float, float)> sig;
+
+ sig.connect(&print_args);
+ sig.connect(&print_sum);
+ sig.connect(&print_product);
+ sig.connect(&print_difference);
+ sig.connect(&print_quotient);
+
+ sig(5., 3.);
+ return 0;
+};

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