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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#pragma once
#include <stdint.h>
/**
* DGUSVPVariable.h
*
* Created on: Feb 9, 2019
* Author: tobi
*/
struct DGUS_VP_Variable {
uint16_t VP;
void* memadr; // If nullptr, the value cannot be uploaded to the display.
uint8_t size;
// Callback that will be called if the display modified the value.
// nullptr makes it readonly for the display.
void (*set_by_display_handler)(DGUS_VP_Variable &var, void *val_ptr);
void (*send_to_display_handler)(DGUS_VP_Variable &var);
template<typename T>
DGUS_VP_Variable& operator =(T &o) {
*(T*)memadr = o; // warning this is not typesafe.
// TODO: Call out the display or mark as dirty for the next update.
return *this;
}
};
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