Updated PushButton to add initial logic for double-clicking

src/Utils.cpp

@@ -70,6 +70,7 @@ PushButton::PushButton(uint8_t pin){
 
 void PushButton::init(uint8_t pin){
   status=0;
+  doubleCheck=false;
   this->pin=pin;
   pinMode(pin, INPUT_PULLUP);
 }
@@ -123,6 +124,83 @@ boolean PushButton::triggered(uint16_t shortTime, uint16_t longTime){
 
 //////////////////////////////////////
 
+boolean PushButton::triggered(uint16_t shortTime, uint16_t longTime, uint16_t doubleTime){
+
+  unsigned long cTime=millis();
+
+  switch(status){
+    
+    case 0:
+      if(doubleCheck && cTime>doubleAlarm){
+        doubleCheck=false;
+        pressType=0;
+        return(true);
+      }
+      
+      if(!digitalRead(pin)){         // button is pressed
+        shortAlarm=cTime+shortTime;
+        if(!doubleCheck){
+          status=1;
+          doubleAlarm=shortAlarm+doubleTime;
+          longAlarm=cTime+longTime;
+        } else {
+          status=4;
+        }
+      }
+    break;  
+  
+    case 1:
+    case 2:
+      if(digitalRead(pin)){         // button is released          
+        status=0;
+        if(cTime>shortAlarm){
+          doubleCheck=true;
+        }
+      } else
+      
+      if(cTime>longAlarm){          // button is long-pressed
+        longAlarm=cTime+longTime;
+        status=3;
+        pressType=1;
+        return(true);
+      }
+    break;
+
+    case 3:
+      if(digitalRead(pin))          // button has been released after a long press
+        status=0;
+      else if(cTime>longAlarm){
+        longAlarm=cTime+longTime;
+        pressType=1;
+        return(true);        
+      }
+    break;
+
+    case 4:    
+      if(digitalRead(pin)){         // button is released          
+        status=0;
+      } else
+      
+      if(cTime>shortAlarm){         // button is still pressed
+        status=5;
+        pressType=2;
+        doubleCheck=false;
+        return(true);
+      }
+    break;
+
+    case 5:
+      if(digitalRead(pin))          // button has been released after double-click
+        status=0;
+     break;
+
+  }
+
+  return(false);
+}
+
+//////////////////////////////////////
+
 boolean PushButton::primed(){
   
   if(millis()>shortAlarm && status==1){
@@ -141,6 +219,12 @@ boolean PushButton::longPress(){
 
 //////////////////////////////////////
 
+int PushButton::type(){
+  return(pressType);
+}
+
+//////////////////////////////////////
+
 void PushButton::wait(){
   while(!digitalRead(pin));
 }

src/Utils.h

@@ -43,8 +43,11 @@ class PushButton{
   
   int status;
   uint8_t pin;
+  boolean doubleCheck;
   uint32_t shortAlarm;
+  uint32_t doubleAlarm;
   uint32_t longAlarm;
+  int pressType;
   boolean isLongPress;
 
   public:
@@ -75,6 +78,7 @@ class PushButton{
 //  Resets state of PushButton.  Should be called once before any loops that will
 //  repeatedly check the button for a trigger event.
 
+  boolean triggered(uint16_t shortTime, uint16_t longTime, uint16_t doubleTime);
   boolean triggered(uint16_t shortTime, uint16_t longTime);
 
 //  Returns true if button has been triggered by either a Long Press or Short Press, where a
@@ -94,6 +98,7 @@ class PushButton{
 //  After returning true, subsequent calls will always return false until the button has been released and reset.
 
   boolean longPress();
+  int type();
 
 //  Returns true if last trigger event was a Long Press, or false if last trigger was a Short Press