mirror of
https://github.com/DCC-EX/CommandStation-EX.git
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48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
/*
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* © 2021 Neil McKechnie
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* © 2021 Chris Harlow
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* All rights reserved.
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*
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* This file is part of CommandStation-EX
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* It is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef DisplayInterface_h
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#define DisplayInterface_h
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#include <Arduino.h>
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// Definition of base class for displays. The base class does nothing.
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class DisplayInterface : public Print {
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public:
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virtual DisplayInterface* loop2(bool force) { (void)force; return NULL; };
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virtual void setRow(byte line) { (void)line; };
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virtual void clear() { };
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virtual size_t write(uint8_t c) { (void)c; return 0; };
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// Additional functions to support multiple displays.
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// Display number zero is the default one and the original display
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// drivers overloaded the above calls only. Newer display drivers
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// (e.g. HAL IO_OledDisplay) should override all functions.
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virtual void setRow(uint8_t displayNo, byte line) {
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if (!displayNo) setRow(line);
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}
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virtual void clear(uint8_t displayNo) {
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if (!displayNo) clear();
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}
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static DisplayInterface *displayHandler;
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};
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#endif
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