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--- in202:seance_6:jalon_4 [2021/05/02 20:49]
bmonsuez [Question n°2]
+++ in202:seance_6:jalon_4 [2022/11/18 10:47] (current)
@@ Line 54: / Line 54: @@
 <code cpp>
-template<int First, int... _Rest> class _ButtonEvents
+template<int First, int... _Rest>
 class _ButtonEvents <First, _Rest...> : private _ButtonEvents <_Rest...>
 {
@@ Line 107: / Line 107: @@
 Pour récupérer les fonctions, nous allons définir les fonctions suivantes :
+<code cpp>
+template<int First, int... _Rest>
 class _ButtonEvents <First, _Rest...> : private _ButtonEvents <_Rest...>
 {
@@ Line 143: / Line 145: @@
 Pour ce faire, il suffit de définit une fonction ''SetupButton(int thePort, Button* theButton)'' comme suit :
+<code cpp>
+template<int First, int... _Rest>
 class _ButtonEvents <First, _Rest...> : private _ButtonEvents <_Rest...>
 {
@@ Line 220: / Line 224: @@
 </code>
-  * Définir les méthodes ''Pressed'', ''Released'' et ''OnChanged'' de la classe ''__ButtonEvents''. Ces méthodes devront être définies après la définition de la classe ''Button''.
+  * Définir les méthodes ''Pressed'', ''Released'' et ''OnChanged'' de la classe ''_ButtonEvents''. Ces méthodes devront être définies après la définition de la classe ''Button''.
 <code cpp>
 template<int First, int... _Rest>
-void _ButtonEvents<First, _Rest...>::Pressed() { if(mButton != NULL) mButton->OnPressed(); }
+void _ButtonEvents<First, _Rest...>::Pressed()
+{ if(mButton != NULL) mButton->OnPressed(); }
 template <int First, int... _Rest>
-void _ButtonEvents<First, _Rest...>::Released() { if(mButton != NULL) mButton->OnReleased(); }
+void _ButtonEvents<First, _Rest...>::Released()
+{ if(mButton != NULL) mButton->OnReleased(); }
 template <int First, int... _Rest>
-void _ButtonEvents<First, _Rest...>::Changed() { if(mButton != NULL) mButton->OnChanged(); }
+void _ButtonEvents<First, _Rest...>::Changed()
+{ if(mButton != NULL) mButton->OnChanged(); }
 </code>
@@ Line 268: / Line 275: @@
     }
 }
+</code>
+===== Code correspondant à la classe Button =====
+<code cpp>
+#ifndef buttonHPP
+#define buttonHPP
+#include"Component.hpp"
+enum ButtonEvent { PRESSED = 0x1, RELEASED = 0x2 };
+typedef void (*interrupt_type)();
+class Button;
+template <int... _Is>
+class _ButtonEvents;
+template <>
+class _ButtonEvents<> {
+public:
+    static interrupt_type GetPressed(int thePort) { return NULL; }
+    static interrupt_type GetReleased(int thePort) { return NULL; }
+    static interrupt_type GetChanged(int thePort) { return NULL; }
+    static void SetButton(int thePort, Button* theButton) {}
+}; // Empty events
+template <int First, int... _Rest>
+class _ButtonEvents<First, _Rest...> : private _ButtonEvents<_Rest...>
+{
+private:
+    static const int mPortNumber = First;
+    static Button* mButton;
+    static void Pressed();
+    static void Released();
+    static void Changed();
+public:
+    static interrupt_type GetPressed(int thePort) { return thePort == mPortNumber ? Pressed : _ButtonEvents<_Rest...>::GetPressed(thePort); }
+    static interrupt_type GetReleased(int thePort) { return thePort == mPortNumber ? Released : _ButtonEvents<_Rest...>::GetReleased(thePort); }
+    static interrupt_type GetChanged(int thePort){ return thePort == mPortNumber ? Changed : _ButtonEvents<_Rest...>::GetChanged(thePort); }
+    static void SetButton(int thePort, Button* theButton);
+};
+typedef _ButtonEvents<0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13> ButtonEvents;
+class Button: public Component
+{
+private:
+    uint32_t m_PortNumber;
+public:
+    Button(uint32_t thePortNumber, const char* theName, bool isDebug = false):
+      m_PortNumber(thePortNumber), Component(theName, isDebug)
+    {
+        pinMode(m_PortNumber, INPUT);
+        ButtonEvents::SetButton(m_PortNumber, this);
+    }
+    void MonitorEvents(ButtonEvent anEvent)
+    {
+      if(anEvent == (PRESSED | RELEASED))
+          attachInterrupt(digitalPinToInterrupt(m_PortNumber),
+            ButtonEvents::GetChanged(m_PortNumber), CHANGE);
+      else if(anEvent == PRESSED)
+      {
+          attachInterrupt(digitalPinToInterrupt(m_PortNumber),
+            ButtonEvents::GetPressed(m_PortNumber), RISING);
+      }
+      else if(anEvent == RELEASED)
+          attachInterrupt(digitalPinToInterrupt(m_PortNumber),
+            ButtonEvents::GetReleased(m_PortNumber), FALLING);
+    }
+    bool IsPressed() { return digitalRead(m_PortNumber) == HIGH; }
+    virtual void OnPressed()
+    {
+      if(IsDebug())
+          Serial << name() << "Button is pressed\n";
+    }
+    virtual void OnReleased()
+    {
+      if(IsDebug())
+          Serial << name() << "Button is released\n";
+    }
+    virtual void OnChanged()
+    {
+      if(IsDebug())
+          Serial << name() << "Button state has changed\n";
+    }
+};
+template<int First, int... _Rest>
+Button* _ButtonEvents<First, _Rest...>::mButton = NULL;
+template<int First, int... _Rest>
+void _ButtonEvents<First, _Rest...>::Pressed()
+{ if(mButton != NULL) mButton->OnPressed(); }
+template <int First, int... _Rest>
+void _ButtonEvents<First, _Rest...>::Released()
+{ if(mButton != NULL) mButton->OnReleased(); }
+template <int First, int... _Rest>
+void _ButtonEvents<First, _Rest...>::Changed()
+{ if(mButton != NULL) mButton->OnChanged(); }
+template <int First, int... _Rest>
+void _ButtonEvents<First, _Rest...>::SetButton(int thePort, Button* theButton)
+{
+    if(thePort == mPortNumber)
+        mButton = theButton;
+    else
+        _ButtonEvents<_Rest...>::SetButton(thePort, theButton);
+}
+#endif
 </code>

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