.. _program_listing_file_src_tap_display_oled_button_handler.cpp:

Program Listing for File oled_button_handler.cpp
================================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_tap_display_oled_button_handler.cpp>` (``src/tap/display/oled_button_handler.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*
    * Copyright (c) 2020-2021 Advanced Robotics at the University of Washington <robomstr@uw.edu>
    *
    * This file is part of Taproot.
    *
    * Taproot is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
    * Taproot is distributed in the hope that it will be useful,
    * but WITHOUT ANY WARRANTY; without even the implied warranty of
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * GNU General Public License for more details.
    *
    * You should have received a copy of the GNU General Public License
    * along with Taproot.  If not, see <https://www.gnu.org/licenses/>.
    */
   
   #include "oled_button_handler.hpp"
   
   #include "tap/drivers.hpp"
   
   namespace tap
   {
   namespace display
   {
   OledButtonHandler::OledButtonHandler(tap::Drivers *drivers)
       : drivers(drivers),
         downButtonPressed(BUTTON_DEBOUNCE_SAMPLES),
         upButtonPressed(BUTTON_DEBOUNCE_SAMPLES),
         leftButtonPressed(BUTTON_DEBOUNCE_SAMPLES),
         rightButtonPressed(BUTTON_DEBOUNCE_SAMPLES),
         okButtonPressed(BUTTON_DEBOUNCE_SAMPLES)
   {
   }
   
   OledButtonHandler::Button OledButtonHandler::getCurrentButtonState()
   {
       int buttonADC = drivers->analog.read(gpio::Analog::Pin::OledJoystick);
   
       downButtonPressed.update(abs(buttonADC - DOWN_ADC_VAL) < ADC_PRESSED_RANGE);
       upButtonPressed.update(abs(buttonADC - UP_ADC_VAL) < ADC_PRESSED_RANGE);
       leftButtonPressed.update(abs(buttonADC - LEFT_ADC_VAL) < ADC_PRESSED_RANGE);
       rightButtonPressed.update(abs(buttonADC - RIGHT_ADC_VAL) < ADC_PRESSED_RANGE);
       okButtonPressed.update(abs(buttonADC - OK_ADC_VAL) < ADC_PRESSED_RANGE);
   
       if (downButtonPressed.getValue())
       {
           return Button::DOWN;
       }
       else if (upButtonPressed.getValue())
       {
           return Button::UP;
       }
       else if (rightButtonPressed.getValue())
       {
           return Button::RIGHT;
       }
       else if (leftButtonPressed.getValue())
       {
           return Button::LEFT;
       }
       else if (okButtonPressed.getValue())
       {
           return Button::OK;
       }
       else
       {
           return Button::NONE;
       }
   }
   }  // namespace display
   }  // namespace tap