add joysick support and state feedback

src/jsbackend/VirtualJoystick.h

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2015-2017 Alex Spataru <alex_spataru@outlook.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef _QJOYSTICKS_JOYSTICK_H
+#define _QJOYSTICKS_JOYSTICK_H
+
+#include <QWidget>
+#include <QKeyEvent>
+#include <QApplication>
+#include <QTimer>
+#include <QScopedPointer>
+
+#include "JoysticksCommon.h"
+
+#define AXIS_AD 0
+#define AXIS_SW 1
+#define AXIS_QE 2
+#define AXIS_UO 3
+#define AXIS_JL 4
+#define AXIS_KI 5
+
+enum AxisState : qint8
+{
+
+	INCREASE = -1,
+	STILL = 0,
+	DECREASE = 1
+
+};
+
+const qint16 AXIS_MINIMUM_VIRTUAL_JOYSTICK { -32767 };
+const qint16 AXIS_MAXIMUM_VIRTUAL_JOYSTICK { 32767 };
+
+const int NUMBER_OF_AXES { 6 };
+const int NUMBER_OF_BUTTONS { 10 };
+
+/**
+ * \brief Translates keyboard input to joystick input
+ *
+ * This class implements a virtual joystick device that uses the computer's
+ * keyboard as means to get the axis, button and POV values of the joystick.
+ */
+class VirtualJoystick : public QObject
+{
+	Q_OBJECT
+
+signals:
+	void enabledChanged();
+	void povEvent(const QJoystickPOVEvent &event);
+	void axisEvent(const QJoystickAxisEvent &event);
+	void buttonEvent(const QJoystickButtonEvent &event);
+
+public:
+	VirtualJoystick(QObject *parent = Q_NULLPTR);
+
+	qreal axisRange() const;
+	bool joystickEnabled() const;
+	QJoystickDevice *joystick();
+
+public slots:
+	void setJoystickID(int id);
+	void setAxisRange(qreal range);
+	void setJoystickEnabled(bool enabled);
+
+	void setAxisSensibility(qreal sensibility);
+
+private slots:
+	void readAxes(int key, bool pressed);
+	void updateAxis();
+	void readPOVs(int key, bool pressed);
+	void readButtons(int key, bool pressed);
+	void processKeyEvent(QKeyEvent *event, bool pressed);
+
+protected:
+	bool eventFilter(QObject *object, QEvent *event);
+
+private:
+	qreal m_axisRange;
+	bool m_joystickEnabled;
+	QJoystickDevice m_joystick;
+
+	qint16 m_axisStep;
+
+	QVector<AxisState> m_axisStatus;
+	QVector<qint16> m_axisValue;
+
+	QScopedPointer<QTimer> m_timerUpdateAxis;
+
+	void changeAxisValue(quint8 axis);
+	void resetAllAxes();
+};
+
+#endif