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- // 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>
- //[ passing_slots_defs_code_snippet
- // 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);
- // simulate user clicking on GUI button at coordinates 52, 38
- void simulateClick();
- private:
- OnClick onClick;
- };
- boost::signals2::connection Button::doOnClick(const OnClickSlotType & slot)
- {
- return onClick.connect(slot);
- }
- void Button::simulateClick()
- {
- onClick(52, 38);
- }
- void printCoordinates(long x, long y)
- {
- std::cout << "(" << x << ", " << y << ")\n";
- }
- //]
- int main()
- {
- //[ passing_slots_usage_code_snippet
- Button button;
- button.doOnClick(&printCoordinates);
- button.simulateClick();
- //]
- return 0;
- }
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