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examples: encoder_ctrl comments added
This commit is contained in:
Gabor
parent
7248eef1f0
commit
358f7cf00b
@ -3,6 +3,29 @@
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*
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*/
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/*
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* Create a simple GUI to demonstrate how to control it with an encoder
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* using 'lv_group'.
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*
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* lv_group:
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* - you can create groups and add object to them
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* - it can be a focused object within a group
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* - the style of the focused object will be automatically modified
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* - different style modifier functions can be applied in each groups
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* - you can focus on the next or previous object (lv_group_focus_next/prev)
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* - letters can be sent to the focused object to do something (lv_group_send):
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* - LV_GROUP_KEY_RIGHT/UP: increment action in the object
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* - LV_GROUP_KEY_LEFT/DOWN: decrement action in the object
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* - LV_GROUP_KEY_ENTER: ok or select action in the object
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* - LV_GROUP_KEY_ESC: close or back action action in the object
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* - or any character for example to a text area
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*
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* The encoder is replaced by 4 button on the screen:
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* - [>] Next (lv_group_focus_next): focus on the next object in the group (simulates encoder press)
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* - [+] IncrementNext (LV_GROUP_KEY_RIGHT): increment signal to the object (simulates rotate right)
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* - [-] DecrementNext (LV_GROUP_KEY_LEFT): increment signal to the object (simulates rotate left)
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* - [!] SelectNext (LV_GROUP_KEY_ENTER): Select something (simulates encoder long press or an 'Select' button)
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*/
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/*********************
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* INCLUDES
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*********************/
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@ -22,23 +45,23 @@
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void channel_create(uint8_t ch_id, lv_group_t * g);
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static void gui_create(void);
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static void enc_create(void);
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static lv_action_res_t mbox_yes_action(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t mbox_no_action(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t enable_action(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t btn_next(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t btn_inc(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t btn_dec(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t btn_sel(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t enc_next(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t enc_inc(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t enc_dec(lv_obj_t * btn, lv_dispi_t * dispi);
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static lv_action_res_t enc_sel(lv_obj_t * btn, lv_dispi_t * dispi);
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/**********************
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* STATIC VARIABLES
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**********************/
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static lv_obj_t * scr;
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static lv_style_t style_mbox_bg;
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static lv_group_t * g; /*Declare an Object Group*/
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static lv_obj_t * scr; /*The screen for the demo*/
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static lv_obj_t * btn_enable; /*An enable button*/
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static lv_style_t style_mbox_bg; /*Black bg. style with opacity*/
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static lv_group_t * g; /*An Object Group*/
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/**********************
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* MACROS
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@ -49,6 +72,7 @@ static lv_group_t * g; /*Declare an Object Group*/
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**********************/
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/**
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* Create a simple GUI to demonstrate encoder control capability
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*/
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void encoder_ctrl_init(void)
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{
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@ -60,147 +84,238 @@ void encoder_ctrl_init(void)
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lv_page_set_sb_mode(scr, LV_PAGE_SB_MODE_AUTO);
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lv_scr_load(scr);
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/*Create an object group for objects to focus*/
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g = lv_group_create();
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/* Create a dark plain style for a message box's background*/
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lv_style_get(LV_STYLE_PLAIN, &style_mbox_bg);
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style_mbox_bg.mcolor = COLOR_BLACK;
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style_mbox_bg.gcolor = COLOR_BLACK;
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style_mbox_bg.opa = OPA_50;
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lv_obj_t * title = lv_label_create(scr, NULL);
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lv_label_set_text(title, "Encoder control");
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lv_obj_set_protect(title, LV_PROTECT_FOLLOW); /*Make a line break in the layout*/
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/*Create a demo GUI*/
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gui_create();
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/*Create a holder, a subtitle and a drop down list*/
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lv_obj_t * ddlist = lv_ddlist_create(scr, NULL);
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lv_ddlist_set_options_str(ddlist, "Low\nMedium\nHigh");
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lv_group_add_obj(g, ddlist); /*Add the object to the first group*/
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/*Copy the previous holder and subtitle and add check boxes*/
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lv_obj_t * holder = lv_cont_create(scr, NULL); /*Create a transparent holder to group some objects*/
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lv_cont_set_fit(holder, true, true);
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lv_cont_set_layout(holder, LV_CONT_LAYOUT_COL_L);
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lv_obj_set_style(holder, lv_style_get(LV_STYLE_TRANSP, NULL));
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lv_obj_t * cb = lv_cb_create(holder, NULL);
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lv_cb_set_text(cb, "Red");
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lv_group_add_obj(g, cb);
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cb = lv_cb_create(holder, cb);
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lv_cb_set_text(cb, "Green");
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cb = lv_cb_create(holder, cb);
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lv_cb_set_text(cb, "Blue");
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/*Copy the previous holder and subtitle and add sliders*/
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lv_obj_t * slider = lv_slider_create(scr, NULL);
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lv_obj_set_size_us(slider, 180, 30);
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lv_group_add_obj(g, slider);
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lv_obj_t * btn = lv_btn_create(scr, NULL);
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lv_btn_set_rel_action(btn, enable_action);
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lv_cont_set_fit(btn, true, true);
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lv_group_add_obj(g, btn);
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lv_obj_t * l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "Enable");
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lv_obj_set_protect(btn, LV_PROTECT_FOLLOW);
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btn = lv_btn_create(lv_scr_act(), NULL);
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lv_btn_set_rel_action(btn, btn_next);
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lv_cont_set_fit(btn, true, true);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, ">");
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btn = lv_btn_create(lv_scr_act(), NULL);
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lv_btn_set_rel_action(btn, btn_dec);
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lv_cont_set_fit(btn, true, true);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "-");
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btn = lv_btn_create(lv_scr_act(), NULL);
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lv_btn_set_rel_action(btn, btn_inc);
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lv_cont_set_fit(btn, true, true);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "+");
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btn = lv_btn_create(lv_scr_act(), NULL);
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lv_btn_set_rel_action(btn, btn_sel);
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lv_cont_set_fit(btn, true, true);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "!");
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/*Create virtual encoder*/
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enc_create();
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/**
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* Create a demo GUI
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*/
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static void gui_create(void)
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{
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/*Create a title*/
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lv_obj_t * title = lv_label_create(scr, NULL);
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lv_label_set_text(title, "Encoder control");
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lv_obj_set_protect(title, LV_PROTECT_FOLLOW); /*Make a line break in the layout*/
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/*Create a drop down list*/
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lv_obj_t * ddlist = lv_ddlist_create(scr, NULL);
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lv_ddlist_set_options_str(ddlist, "Low\nMedium\nHigh");
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lv_group_add_obj(g, ddlist); /*Add the object to the group*/
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/*Create a holder an check boxes on it*/
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lv_obj_t * holder = lv_cont_create(scr, NULL); /*Create a transparent holder*/
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lv_cont_set_fit(holder, true, true);
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lv_cont_set_layout(holder, LV_CONT_LAYOUT_COL_L);
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lv_obj_set_style(holder, lv_style_get(LV_STYLE_TRANSP, NULL));
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lv_obj_t * cb = lv_cb_create(holder, NULL); /*First check box*/
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lv_cb_set_text(cb, "Red");
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lv_group_add_obj(g, cb); /*Add to the group*/
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cb = lv_cb_create(holder, cb); /*Copy the first check box. Automatically added to the same group*/
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lv_cb_set_text(cb, "Green");
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cb = lv_cb_create(holder, cb); /*Copy the second check box. Automatically added to the same group*/
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lv_cb_set_text(cb, "Blue");
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/*Create a sliders*/
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lv_obj_t * slider = lv_slider_create(scr, NULL);
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lv_obj_set_size_us(slider, 180, 30);
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lv_bar_set_range(slider, 0, 20);
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lv_group_add_obj(g, slider); /*Add to the group*/
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/*Create a button*/
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btn_enable = lv_btn_create(scr, NULL);
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lv_btn_set_rel_action(btn_enable, enable_action);
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lv_cont_set_fit(btn_enable, true, true);
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lv_group_add_obj(g, btn_enable); /*Add to the group*/
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lv_obj_t * l = lv_label_create(btn_enable, NULL);
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lv_label_set_text(l, "Enable");
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lv_obj_set_protect(btn_enable, LV_PROTECT_FOLLOW); /*Make a line break in the layout*/
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}
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/**
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* Create virtual encoder using 4 buttons:
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* - [>] Next: focus on the next object in the group (simulates encoder press)
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* - [+] Increment: increment signal to the object (simulates rotate right)
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* - [-] Decrement: increment signal to the object (simulates rotate left)
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* - [!] Select: Select something (simulates encoder long press or an 'Select' button)
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*/
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static void enc_create(void)
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{
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/*Next button*/
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lv_obj_t * btn = lv_btn_create(lv_scr_act(), NULL);
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lv_btn_set_rel_action(btn, enc_next);
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lv_cont_set_fit(btn, true, true);
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lv_obj_t * l = lv_label_create(btn, NULL);
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lv_label_set_text(l, ">");
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/*Increment button*/
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btn = lv_btn_create(lv_scr_act(), btn);
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lv_btn_set_rel_action(btn, enc_dec);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "-");
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/*Decrement button*/
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btn = lv_btn_create(lv_scr_act(), btn);
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lv_btn_set_rel_action(btn, enc_inc);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "+");
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/*Select button*/
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btn = lv_btn_create(lv_scr_act(), btn);
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lv_btn_set_rel_action(btn, enc_sel);
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l = lv_label_create(btn, NULL);
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lv_label_set_text(l, "!");
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}
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/**
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* Called when the Enable button is released. Show a message box to really enable or not?
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* @param btn pointer to the Enable button
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* @param dispi pointer to the caller display input or NULL if the encoder used
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* @return LV_ACTION_RES_OK: because the button is not deleted
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*/
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static lv_action_res_t enable_action(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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/*If the butto nsi released the show message box to be sure about the Enable*/
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if(lv_btn_get_state(btn) == LV_BTN_STATE_REL) {
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/* Create a dark screen sized bg. with opacity to show
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* the other objects are not available now*/
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lv_obj_t * bg = lv_obj_create(scr, NULL);
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lv_obj_set_protect(bg, LV_PROTECT_PARENT);
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lv_obj_set_parent(bg, scr);
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lv_obj_set_protect(bg, LV_PROTECT_PARENT); /*The page screen move it to scrollable area*/
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lv_obj_set_parent(bg, scr); /*So movi it back ater protected*/
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lv_obj_set_style(bg, &style_mbox_bg);
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lv_obj_set_size(bg, LV_HOR_RES, LV_VER_RES);
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lv_obj_set_pos(bg, 0, 0);
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lv_obj_set_click(bg, false);
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lv_obj_set_click(bg, false); /*For test disable click there fore buttons under it remain clickable*/
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/*Create a message box*/
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lv_obj_t * mbox = lv_mbox_create(bg, NULL);
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lv_mbox_set_text(mbox, "Really Enable the outputs?");
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lv_group_add_obj(g, mbox);
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lv_group_add_obj(g, mbox); /*Add to he group*/
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/*Add two buttons*/
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lv_mbox_add_btn(mbox, "Yes", mbox_yes_action);
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lv_mbox_add_btn(mbox, "No", mbox_no_action);
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lv_obj_align(mbox, NULL, LV_ALIGN_CENTER, 0, - LV_DPI / 2);
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/*Focus on the new message box, can freeze focus on it*/
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lv_group_focus_obj(mbox);
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lv_group_focus_freeze(g, true);
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}
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/*Disable is not dangerous so just change the button state*/
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else {
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lv_btn_set_state(btn_enable, LV_BTN_STATE_REL);
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}
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return LV_ACTION_RES_OK;
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}
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/**
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* Called when the message box's 'Yes' button is released
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* @param btn pointer to the 'Yes' button
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* @param dispi pointer to the caller display input or NULL if the encoder used
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* @return LV_ACTION_RES_INV: because the button along with the message box will be deleted
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*/
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static lv_action_res_t mbox_yes_action(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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lv_group_focus_freeze(g, false); /*Release the freeze*/
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lv_obj_t * mbox = lv_mbox_get_from_btn(btn);
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lv_group_focus_freeze(g, false);
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lv_obj_del(lv_obj_get_parent(mbox));
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lv_obj_del(lv_obj_get_parent(mbox)); /*Delete the black background. (it will delete the mbox too)*/
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/*Mark the enabled state by toggling the button*/
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lv_btn_set_state(btn_enable, LV_BTN_STATE_TREL);
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/* In a real case you can add some specific actions here
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* to really enable something */
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return LV_ACTION_RES_INV;
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}
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/**
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* Called when the message box's 'No' button is released
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* @param btn pointer to the 'No' button
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* @param dispi pointer to the caller display input or NULL if the encoder used
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* @return LV_ACTION_RES_INV: because the button along with the message box will be deleted
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*/
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static lv_action_res_t mbox_no_action(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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lv_group_focus_freeze(g, false); /*Release the freeze*/
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lv_obj_t * mbox = lv_mbox_get_from_btn(btn);
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lv_group_focus_freeze(g, false);
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lv_obj_del(lv_obj_get_parent(mbox));
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lv_obj_del(lv_obj_get_parent(mbox)); /*Delete the black background. (it will delete the mbox too)*/
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return LV_ACTION_RES_INV;
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}
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static lv_action_res_t btn_next(lv_obj_t * btn, lv_dispi_t * dispi)
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/**
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* Called when the Encoder emulator Next button is released
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* @param btn pointer to the button
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* @param dispi pointer to the caller display input
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* @return LV_ACTION_RES_OK: because the button is not deleted
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*/
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static lv_action_res_t enc_next(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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/*Focus on the next object in the group*/
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lv_group_focus_next(g);
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return LV_ACTION_RES_OK;
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}
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static lv_action_res_t btn_inc(lv_obj_t * btn, lv_dispi_t * dispi)
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/**
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* Called when the Encoder emulator Increment button is released
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* @param btn pointer to the button
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* @param dispi pointer to the caller display input
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* @return LV_ACTION_RES_OK: because the button is not deleted
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*/
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static lv_action_res_t enc_inc(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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/* Send RIGHT key when rotate to right.
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* It will trigger an increment like action in the object */
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lv_group_send(g, LV_GROUP_KEY_RIGHT);
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return LV_ACTION_RES_OK;
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}
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static lv_action_res_t btn_dec(lv_obj_t * btn, lv_dispi_t * dispi)
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/**
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* Called when the Encoder emulator Increment button is released
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* @param btn pointer to the button
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* @param dispi pointer to the caller display input
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* @return LV_ACTION_RES_OK: because the button is not deleted
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*/
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static lv_action_res_t enc_dec(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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/* Send LEFT key when rotate to left.
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* It will trigger a decrement like action in the object */
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lv_group_send(g, LV_GROUP_KEY_LEFT);
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return LV_ACTION_RES_OK;
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}
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static lv_action_res_t btn_sel(lv_obj_t * btn, lv_dispi_t * dispi)
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/**
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* Called when the Encoder emulator Send button is released
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* @param btn pointer to the button
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* @param dispi pointer to the caller display input
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* @return LV_ACTION_RES_OK: because the button is not deleted
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*/
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static lv_action_res_t enc_sel(lv_obj_t * btn, lv_dispi_t * dispi)
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{
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/* Send ENTER key.
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* It will trigger an 'OK' or 'Select' action in the object */
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lv_group_send(g, LV_GROUP_KEY_ENTER);
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return LV_ACTION_RES_OK;
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