111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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// Copyright 2002-2006 Andreas Huber Doenni
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// Distributed under the Boost Software License, Version 1.0. (See accompany-
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// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// This program shows how a state machine can be spread over several
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// translation units if necessary. The inner workings of a digital camera are
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// modeled, the corresponding state chart looks as follows:
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//
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// ---------------------------
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// | |
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// | NotShooting |
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// | |
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// | ------------- |<---O
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// | O--->| Idle | | --------------
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// | ------------- | EvShutterHalf | |
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// | | ^ |------------------>| Shooting |
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// | EvConfig | | EvConfig | | |
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// | v | | EvShutterRelease | |
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// | ------------- |<------------------| |
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// | | Configuring | | | |
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// | ------------- | --------------
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// ---------------------------
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//
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// The states Configuring and Shooting will contain a large amount of logic,
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// so they are implemented in their own translation units. This way one team
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// could implement the Configuring mode while the other would work on the
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// Shooting mode. Once the above state chart is implemented, the teams could
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// work completely independently of each other.
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#include "Precompiled.hpp"
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#include "Camera.hpp"
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#include <iostream>
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//////////////////////////////////////////////////////////////////////////////
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char GetKey()
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{
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char key;
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std::cin >> key;
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return key;
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}
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//////////////////////////////////////////////////////////////////////////////
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int main()
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{
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std::cout << "Boost.Statechart Camera example\n\n";
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std::cout << "h<CR>: Press shutter half-way\n";
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std::cout << "f<CR>: Press shutter fully\n";
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std::cout << "r<CR>: Release shutter\n";
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std::cout << "c<CR>: Enter/exit configuration\n";
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std::cout << "e<CR>: Exits the program\n\n";
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std::cout << "You may chain commands, e.g. hfr<CR> first presses the shutter half-way,\n";
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std::cout << "fully and then releases it.\n\n";
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Camera myCamera;
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myCamera.initiate();
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char key = GetKey();
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while ( key != 'e' )
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{
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switch( key )
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{
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case 'h':
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{
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myCamera.process_event( EvShutterHalf() );
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}
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break;
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case 'f':
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{
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myCamera.process_event( EvShutterFull() );
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}
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break;
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case 'r':
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{
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myCamera.process_event( EvShutterRelease() );
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}
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break;
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case 'c':
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{
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myCamera.process_event( EvConfig() );
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}
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break;
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default:
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{
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std::cout << "Invalid key!\n";
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}
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break;
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}
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key = GetKey();
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}
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return 0;
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}
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