mirror of
https://github.com/Llewellynvdm/conky.git
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119 lines
3.5 KiB
C++
119 lines
3.5 KiB
C++
/*
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*
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* Conky, a system monitor, based on torsmo
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*
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* Please see COPYING for details
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*
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* Copyright (C) 2010 Pavel Labath et al.
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*
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* This program 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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* This program 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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef DISPLAY_OUTPUT_HH
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#define DISPLAY_OUTPUT_HH
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#include <limits>
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#include <string>
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#include <type_traits>
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#include "luamm.hh"
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namespace conky {
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bool initialize_display_outputs();
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bool shutdown_display_outputs();
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/*
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* A base class for all display outputs.
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* API consists of two functions:
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* - get_number should return numeric representation of the data (if available).
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* This can then be used when drawing graphs, bars, ... The default
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* implementation returns NaN.
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* - get_text should return textual representation of the data. This is used
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* when simple displaying the value of the data source. The default
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* implementation converts get_number() to a string, but you can override to
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* return anything (e.g. add units)
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*/
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class display_output_base {
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private:
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// copying is a REALLY bad idea
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display_output_base(const display_output_base &) = delete;
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display_output_base &operator=(const display_output_base &) = delete;
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public:
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const std::string name;
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bool is_active;
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bool is_graphical;
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int priority;
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explicit display_output_base(const std::string &name_);
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virtual ~display_output_base() {}
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static bool priority_compare(const display_output_base *a,
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const display_output_base *b) {
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return a->priority > b->priority;
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}
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// check if available and enabled in settings
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virtual bool detect() { return false; };
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// connect to DISPLAY and other stuff
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virtual bool initialize() { return false; };
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virtual bool shutdown() { return false; };
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// drawing primitives
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virtual bool set_foreground_color(long c) { return false; }
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virtual bool begin_draw_text() { return false; };
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virtual bool end_draw_text() { return false; };
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virtual bool draw_string(const char *s, int w) { return false; };
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virtual void line_inner_done() {}
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virtual int getx() { return 0; };
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virtual int gety() { return 0; };
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virtual bool gotox(int x) { return false; };
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virtual bool gotoy(int y) { return false; };
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virtual bool gotoxy(int x, int y) { return false; };
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virtual bool flush() { return false; };
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friend bool conky::initialize_display_outputs();
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friend bool conky::shutdown_display_outputs();
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protected:
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virtual bool active() { return is_active; };
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virtual bool graphical() { return is_graphical; };
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};
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/*
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* The selected and active display outputs.
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*/
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extern std::vector<display_output_base *> active_display_outputs;
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/*
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* Use this to declare a display output that has been disabled during
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* compilation. We can then print a nice error message telling the used which
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* setting to enable.
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*/
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class disabled_display_output : public display_output_base {
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public:
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const std::string define;
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disabled_display_output(const std::string &name, const std::string &define);
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};
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} // namespace conky
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#endif /* DISPLAY_OUTPUT_HH */
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