example.c

/**
 * @file lv_demo_keypad_encoder.c
 *
 */

/*********************
 *      INCLUDES
 *********************/
#include "lvgl.h"
#include "example.h"

#if LV_USE_DEMO_KEYPAD_AND_ENCODER || 1

/*********************
 *      DEFINES
 *********************/

/**********************
 *      TYPEDEFS
 **********************/

/**********************
 *  STATIC PROTOTYPES
 **********************/
static void selectors_create(lv_obj_t * parent);
static void text_input_create(lv_obj_t * parent);
static void msgbox_create(void);

static void msgbox_event_cb(lv_event_t * e);
static void ta_event_cb(lv_event_t * e);

/**********************
 *  STATIC VARIABLES
 **********************/
static lv_group_t * g;
static lv_obj_t * tv;
static lv_obj_t * t1;
static lv_obj_t * t2;

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

void lv_demo_keypad_encoder(void)
{
    g = lv_group_create();
    lv_group_set_default(g);

    lv_indev_t * cur_drv = NULL;
    for(;;) {
        cur_drv = lv_indev_get_next(cur_drv);
        if(!cur_drv) {
            break;
        }

        if(cur_drv->driver->type == LV_INDEV_TYPE_KEYPAD) {
            lv_indev_set_group(cur_drv, g);
        }

        if(cur_drv->driver->type == LV_INDEV_TYPE_ENCODER) {
            lv_indev_set_group(cur_drv, g);
        }
    }

    tv = lv_tabview_create(lv_scr_act(), LV_DIR_TOP, LV_DPI_DEF / 3);

    t1 = lv_tabview_add_tab(tv, "Selectors");
    t2 = lv_tabview_add_tab(tv, "Text input");

    selectors_create(t1);
    text_input_create(t2);

    msgbox_create();
}

/**********************
 *   STATIC FUNCTIONS
 **********************/

static void selectors_create(lv_obj_t * parent)
{
    lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
    lv_obj_set_flex_align(parent, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);

    lv_obj_t * obj;

    obj = lv_table_create(parent);
    lv_table_set_cell_value(obj, 0, 0, "00");
    lv_table_set_cell_value(obj, 0, 1, "01");
    lv_table_set_cell_value(obj, 1, 0, "10");
    lv_table_set_cell_value(obj, 1, 1, "11");
    lv_table_set_cell_value(obj, 2, 0, "20");
    lv_table_set_cell_value(obj, 2, 1, "21");
    lv_table_set_cell_value(obj, 3, 0, "30");
    lv_table_set_cell_value(obj, 3, 1, "31");
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_calendar_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_btnmatrix_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_checkbox_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_slider_create(parent);
    lv_slider_set_range(obj, 0, 10);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_switch_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_spinbox_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_dropdown_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    obj = lv_roller_create(parent);
    lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);

    lv_obj_t * list = lv_list_create(parent);
    lv_obj_update_layout(list);
    if(lv_obj_get_height(list) > lv_obj_get_content_height(parent)) {
        lv_obj_set_height(list, lv_obj_get_content_height(parent));
    }

    lv_list_add_btn(list, LV_SYMBOL_OK, "Apply");
    lv_list_add_btn(list, LV_SYMBOL_CLOSE, "Close");
    lv_list_add_btn(list, LV_SYMBOL_EYE_OPEN, "Show");
    lv_list_add_btn(list, LV_SYMBOL_EYE_CLOSE, "Hide");
    lv_list_add_btn(list, LV_SYMBOL_TRASH, "Delete");
    lv_list_add_btn(list, LV_SYMBOL_COPY, "Copy");
    lv_list_add_btn(list, LV_SYMBOL_PASTE, "Paste");
}

static void text_input_create(lv_obj_t * parent)
{
    lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);

    lv_obj_t * ta1 = lv_textarea_create(parent);
    lv_obj_set_width(ta1, LV_PCT(100));
    lv_textarea_set_one_line(ta1, true);
    lv_textarea_set_placeholder_text(ta1, "Click with an encoder to show a keyboard");

    lv_obj_t * ta2 = lv_textarea_create(parent);
    lv_obj_set_width(ta2, LV_PCT(100));
    lv_textarea_set_one_line(ta2, true);
    lv_textarea_set_placeholder_text(ta2, "Type something");

    lv_obj_t * kb = lv_keyboard_create(lv_scr_act());
    lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN);

    lv_obj_add_event_cb(ta1, ta_event_cb, LV_EVENT_ALL, kb);
    lv_obj_add_event_cb(ta2, ta_event_cb, LV_EVENT_ALL, kb);
}

static void msgbox_create(void)
{
    static const char * btns[] = {"Ok", "Cancel", ""};
    lv_obj_t * mbox = lv_msgbox_create(NULL, "Hi", "Welcome to the keyboard and encoder demo", btns, false);
    lv_obj_add_event_cb(mbox, msgbox_event_cb, LV_EVENT_ALL, NULL);
    lv_group_focus_obj(lv_msgbox_get_btns(mbox));
    lv_obj_add_state(lv_msgbox_get_btns(mbox), LV_STATE_FOCUS_KEY);
#if LV_EX_MOUSEWHEEL
    lv_group_set_editing(g, true);
#endif
    lv_group_focus_freeze(g, true);

    lv_obj_align(mbox, LV_ALIGN_CENTER, 0, 0);

    lv_obj_t * bg = lv_obj_get_parent(mbox);
    lv_obj_set_style_bg_opa(bg, LV_OPA_70, 0);
    lv_obj_set_style_bg_color(bg, lv_palette_main(LV_PALETTE_GREY), 0);
}

static void msgbox_event_cb(lv_event_t * e)
{
    lv_event_code_t code = lv_event_get_code(e);
    lv_obj_t * msgbox = lv_event_get_current_target(e);

    if(code == LV_EVENT_VALUE_CHANGED) {
        const char * txt = lv_msgbox_get_active_btn_text(msgbox);
        if(txt) {
            lv_msgbox_close(msgbox);
            lv_group_focus_freeze(g, false);
            lv_group_focus_obj(lv_obj_get_child(t1, 0));
            lv_obj_scroll_to(t1, 0, 0, LV_ANIM_OFF);

        }
    }
}

static void ta_event_cb(lv_event_t * e)
{
    lv_indev_t * indev = lv_indev_get_act();
    if(indev == NULL) return;
    lv_indev_type_t indev_type = lv_indev_get_type(indev);

    lv_event_code_t code = lv_event_get_code(e);
    lv_obj_t * ta = lv_event_get_target(e);
    lv_obj_t * kb = lv_event_get_user_data(e);

    if(code == LV_EVENT_CLICKED && indev_type == LV_INDEV_TYPE_ENCODER) {
        lv_keyboard_set_textarea(kb, ta);
        lv_obj_clear_flag(kb, LV_OBJ_FLAG_HIDDEN);
        lv_group_focus_obj(kb);
        lv_group_set_editing(lv_obj_get_group(kb), kb);
        lv_obj_set_height(tv, LV_VER_RES / 2);
        lv_obj_align(kb, LV_ALIGN_BOTTOM_MID, 0, 0);
    }

    if(code == LV_EVENT_READY || code == LV_EVENT_CANCEL) {
        lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN);
        lv_obj_set_height(tv, LV_VER_RES);
    }
}

#endif