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Alejandro Guerrero 2026-09-27 17:21:39 +02:00
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103
libraries/lvgl/examples/widgets/table/lv_example_table_2.c Normal file
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#include "../../lv_examples.h"
#if LV_USE_TABLE && LV_BUILD_EXAMPLES
#define ITEM_CNT 200
static void draw_event_cb(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e);
/*If the cells are drawn...*/
if(dsc->part == LV_PART_ITEMS) {
bool chk = lv_table_has_cell_ctrl(obj, dsc->id, 0, LV_TABLE_CELL_CTRL_CUSTOM_1);
lv_draw_rect_dsc_t rect_dsc;
lv_draw_rect_dsc_init(&rect_dsc);
rect_dsc.bg_color = chk ? lv_theme_get_color_primary(obj) : lv_palette_lighten(LV_PALETTE_GREY, 2);
rect_dsc.radius = LV_RADIUS_CIRCLE;
lv_area_t sw_area;
sw_area.x1 = dsc->draw_area->x2 - 50;
sw_area.x2 = sw_area.x1 + 40;
sw_area.y1 = dsc->draw_area->y1 + lv_area_get_height(dsc->draw_area) / 2 - 10;
sw_area.y2 = sw_area.y1 + 20;
lv_draw_rect(dsc->draw_ctx, &rect_dsc, &sw_area);
rect_dsc.bg_color = lv_color_white();
if(chk) {
sw_area.x2 -= 2;
sw_area.x1 = sw_area.x2 - 16;
}
else {
sw_area.x1 += 2;
sw_area.x2 = sw_area.x1 + 16;
}
sw_area.y1 += 2;
sw_area.y2 -= 2;
lv_draw_rect(dsc->draw_ctx, &rect_dsc, &sw_area);
}
}
static void change_event_cb(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
uint16_t col;
uint16_t row;
lv_table_get_selected_cell(obj, &row, &col);
bool chk = lv_table_has_cell_ctrl(obj, row, 0, LV_TABLE_CELL_CTRL_CUSTOM_1);
if(chk) lv_table_clear_cell_ctrl(obj, row, 0, LV_TABLE_CELL_CTRL_CUSTOM_1);
else lv_table_add_cell_ctrl(obj, row, 0, LV_TABLE_CELL_CTRL_CUSTOM_1);
}
/**
* A very light-weighted list created from table
*/
void lv_example_table_2(void)
{
/*Measure memory usage*/
lv_mem_monitor_t mon1;
lv_mem_monitor(&mon1);
uint32_t t = lv_tick_get();
lv_obj_t * table = lv_table_create(lv_scr_act());
/*Set a smaller height to the table. It'll make it scrollable*/
lv_obj_set_size(table, LV_SIZE_CONTENT, 200);
lv_table_set_col_width(table, 0, 150);
lv_table_set_row_cnt(table, ITEM_CNT); /*Not required but avoids a lot of memory reallocation lv_table_set_set_value*/
lv_table_set_col_cnt(table, 1);
/*Don't make the cell pressed, we will draw something different in the event*/
lv_obj_remove_style(table, NULL, LV_PART_ITEMS | LV_STATE_PRESSED);
uint32_t i;
for(i = 0; i < ITEM_CNT; i++) {
lv_table_set_cell_value_fmt(table, i, 0, "Item %"LV_PRIu32, i + 1);
}
lv_obj_align(table, LV_ALIGN_CENTER, 0, -20);
/*Add an event callback to to apply some custom drawing*/
lv_obj_add_event_cb(table, draw_event_cb, LV_EVENT_DRAW_PART_END, NULL);
lv_obj_add_event_cb(table, change_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
lv_mem_monitor_t mon2;
lv_mem_monitor(&mon2);
uint32_t mem_used = mon1.free_size - mon2.free_size;
uint32_t elaps = lv_tick_elaps(t);
lv_obj_t * label = lv_label_create(lv_scr_act());
lv_label_set_text_fmt(label, "%"LV_PRIu32" items were created in %"LV_PRIu32" ms\n"
"using %"LV_PRIu32" bytes of memory",
ITEM_CNT, elaps, mem_used);
lv_obj_align(label, LV_ALIGN_BOTTOM_MID, 0, -10);
}
#endif