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Also thereby implements input on the ColecoVision, in theory at least. No input is being fed though, so...
69 lines
1.4 KiB
C++
69 lines
1.4 KiB
C++
//
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// Joystick.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 14/10/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#ifndef Joystick_hpp
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#define Joystick_hpp
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#include <vector>
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namespace Inputs {
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/*!
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Provides an intermediate idealised model of a simple joystick, allowing a host
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machine to toggle states, while an interested party either observes or polls.
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*/
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class Joystick {
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public:
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virtual ~Joystick() {}
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struct DigitalInput {
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enum Type {
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Up, Down, Left, Right, Fire,
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Key
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} type;
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union {
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struct {
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int index;
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} control;
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struct {
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wchar_t symbol;
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} key;
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} info;
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DigitalInput(Type type, int index = 0) : type(type) {
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info.control.index = index;
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}
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DigitalInput(wchar_t symbol) : type(Key) {
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info.key.symbol = symbol;
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}
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bool operator == (const DigitalInput &rhs) {
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if(rhs.type != type) return false;
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if(rhs.type == Key) {
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return rhs.info.key.symbol == info.key.symbol;
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} else {
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return rhs.info.control.index == info.control.index;
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}
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}
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};
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virtual std::vector<DigitalInput> get_inputs() = 0;
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// Host interface.
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virtual void set_digital_input(const DigitalInput &digital_input, bool is_active) = 0;
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virtual void reset_all_inputs() {
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for(const auto &input: get_inputs()) {
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set_digital_input(input, false);
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}
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}
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};
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}
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#endif /* Joystick_hpp */
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