40 lines
1.7 KiB
C++
40 lines
1.7 KiB
C++
#pragma once
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/*
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If you want to create a new GUI (tab in terms of lvgl) for the touch screen, then
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- copy one of the existing GUIs, e.g. gui_numpad.cpp and gui_numpad.h
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- place the files in the right folder:
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- in folder "gui_general_and_keys" if they are of general purpose, not only for a specific device
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- in the device folder, if the GUI is specific for a certain device
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- in folder "scenes" if the GUI is intended for a specific scene
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It does not really matter where the files are placed, but doing so helps to keep a clean structure
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- rename the functions, they must not have the same name as the ones in the file you copied from
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- call "register_gui_<nameOfGUI>();" in main.cpp
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register_gui(std::string(tabName), & create_tab_content_settings, & notify_tab_before_delete_settings);
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Technically spoken, to register a GUI, you need to provide several function pointers:
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- one for creating the content of the tab
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- one to persist the state of the gui before it will be deleted, if needed
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- and the name of the tab
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*/
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#include <string>
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#include <vector>
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#include <map>
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#include <lvgl.h>
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typedef void (*create_tab_content)(lv_obj_t* tab);
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typedef void (*notify_tab_before_delete)(void);
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// https://stackoverflow.com/questions/840501/how-do-function-pointers-in-c-work
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struct gui_definition {
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std::string this_name;
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create_tab_content this_create_tab_content;
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notify_tab_before_delete this_notify_tab_before_delete;
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uint32_t this_tabID;
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lv_obj_t* this_tab;
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};
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extern std::map<std::string, gui_definition> registered_guis_byName_map;
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void register_gui(std::string a_name, create_tab_content a_create_tab_content, notify_tab_before_delete a_notify_tab_before_delete);
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