Line data    Source code

       1             : /* ✔ */
       2             : 
       3             : #pragma once
       4             : 
       5             : #include <AH/Settings/Warnings.hpp>
       6             : AH_DIAGNOSTIC_WERROR() // Enable errors on warnings
       7             : 
       8             : #include "Button.hpp"
       9             : 
      10             : BEGIN_AH_NAMESPACE
      11             : 
      12             : /**
      13             :  * @brief   A class for buttons that increment and decrement some counter or 
      14             :  *          setting.
      15             :  * 
      16             :  * It behaves the same way as a computer keyboard: when you press the increment
      17             :  * (decrement) button, it increments (decrements) the counter once. 
      18             :  * If you keep on pressing it for longer than a certain threshold, it keeps on 
      19             :  * incrementing (decrementing) at a faster rate, until you release it.  
      20             :  * If both the increment and the decrement button are pressed at once, it resets
      21             :  * the counter.
      22             :  * 
      23             :  * @ingroup AH_HardwareUtils
      24             :  */
      25             : class IncrementDecrementButtons {
      26             :   public:
      27             :     /** 
      28             :      * @brief   Create a IncrementDecrementButtons object.
      29             :      * 
      30             :      * @param   incrementButton
      31             :      *          The button to increment the counter.  
      32             :      *          The button is copied.
      33             :      * @param   decrementButton
      34             :      *          The button to decrement the counter.  
      35             :      *          The button is copied.
      36             :      */
      37          12 :     IncrementDecrementButtons(const Button &incrementButton,
      38             :                               const Button &decrementButton)
      39          24 :         : incrementButton(incrementButton), decrementButton(decrementButton) {}
      40             : 
      41             :     /// @see     Button::begin
      42           7 :     void begin() {
      43           7 :         incrementButton.begin();
      44           7 :         decrementButton.begin();
      45           7 :     }
      46             : 
      47             :     /**
      48             :      * @brief   An enumeration of the different actions to be performed by the
      49             :      *          counter.
      50             :      * @todo    Add states for initial press.
      51             :      */
      52             :     enum State {
      53             :         Nothing = 0, ///< The counter should not be incremented.
      54             :         Increment,   ///< The counter should be incremented.
      55             :         Decrement,   ///< The counter should be decremented.
      56             :         Reset,       ///< The counter should be reset to the initial value.
      57             :     };
      58             : 
      59             :     /**
      60             :      * @brief   Update and return the state of the increment/decrement button.
      61             :      */
      62          38 :     State update() { return state = updateImplementation(); }
      63             : 
      64             :     /**
      65             :      * @brief   Return the state of the increment/decrement button without 
      66             :      *          updating it.
      67             :      * 
      68             :      * Returns the same value as the last @ref update call.
      69             :      */
      70             :     State getState() const { return state; }
      71             : 
      72             : #ifdef AH_INDIVIDUAL_BUTTON_INVERT
      73             :     /// @see    Button::invert
      74             :     void invert() {
      75             :         incrementButton.invert();
      76             :         decrementButton.invert();
      77             :     }
      78             : #endif
      79             : 
      80             :   protected:
      81             :     State updateImplementation();
      82             : 
      83             :   private:
      84             :     Button incrementButton;
      85             :     Button decrementButton;
      86             : 
      87             :     enum {
      88             :         Initial,
      89             :         LongPress,
      90             :         AfterReset,
      91          12 :     } longPressState = Initial;
      92             :     unsigned long longPressRepeat;
      93          12 :     State state = Nothing;
      94             : };
      95             : 
      96             : END_AH_NAMESPACE
      97             : 
      98             : AH_DIAGNOSTIC_POP()