56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
// Example program showing passing of slots through an interface.
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//
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// Copyright Douglas Gregor 2001-2004.
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// Copyright Frank Mori Hess 2009.
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//
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// Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org
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#include <iostream>
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#include <boost/signals2/signal.hpp>
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//[ passing_slots_defs_code_snippet
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// a pretend GUI button
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class Button
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{
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typedef boost::signals2::signal<void (int x, int y)> OnClick;
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public:
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typedef OnClick::slot_type OnClickSlotType;
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// forward slots through Button interface to its private signal
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boost::signals2::connection doOnClick(const OnClickSlotType & slot);
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// simulate user clicking on GUI button at coordinates 52, 38
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void simulateClick();
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private:
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OnClick onClick;
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};
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boost::signals2::connection Button::doOnClick(const OnClickSlotType & slot)
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{
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return onClick.connect(slot);
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}
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void Button::simulateClick()
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{
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onClick(52, 38);
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}
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void printCoordinates(long x, long y)
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{
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std::cout << "(" << x << ", " << y << ")\n";
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}
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//]
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int main()
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{
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//[ passing_slots_usage_code_snippet
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Button button;
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button.doOnClick(&printCoordinates);
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button.simulateClick();
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//]
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return 0;
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}
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