1
0
mirror of https://github.com/DCC-EX/CommandStation-EX.git synced 2024-12-23 21:01:25 +01:00
CommandStation-EX/DisplayInterface.h
2023-02-12 09:01:16 +00:00

48 lines
1.6 KiB
C++

/*
* © 2021 Neil McKechnie
* © 2021 Chris Harlow
* All rights reserved.
*
* This file is part of CommandStation-EX
*
* This 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.
*
* It 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 CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef DisplayInterface_h
#define DisplayInterface_h
#include <Arduino.h>
// Definition of base class for displays. The base class does nothing.
class DisplayInterface : public Print {
public:
virtual DisplayInterface* loop2(bool force) { (void)force; return NULL; };
virtual void setRow(byte line) { (void)line; };
virtual void clear() { };
virtual size_t write(uint8_t c) { (void)c; return 0; };
// Additional functions to support multiple displays.
// Display number zero is the default one and the original display
// drivers overloaded the above calls only. Newer display drivers
// (e.g. HAL IO_OledDisplay) should override all functions.
virtual void setRow(uint8_t displayNo, byte line) {
if (!displayNo) setRow(line);
}
virtual void clear(uint8_t displayNo) {
if (!displayNo) clear();
}
static DisplayInterface *displayHandler;
};
#endif