1 #include "../../lv_examples.h"
2 #if LV_USE_CHART && LV_BUILD_EXAMPLES
3
4 static lv_obj_t * chart;
5 static lv_chart_series_t * ser;
6 static lv_chart_cursor_t * cursor;
7
value_changed_event_cb(lv_event_t * e)8 static void value_changed_event_cb(lv_event_t * e)
9 {
10 static int32_t last_id = -1;
11 lv_obj_t * obj = lv_event_get_target(e);
12
13 last_id = lv_chart_get_pressed_point(obj);
14 if(last_id != LV_CHART_POINT_NONE) {
15 lv_chart_set_cursor_point(obj, cursor, NULL, last_id);
16 }
17 }
18
19 /**
20 * Show cursor on the clicked point
21 */
lv_example_chart_6(void)22 void lv_example_chart_6(void)
23 {
24 chart = lv_chart_create(lv_screen_active());
25 lv_obj_set_size(chart, 200, 150);
26 lv_obj_align(chart, LV_ALIGN_CENTER, 0, -10);
27
28 // lv_chart_set_axis_tick(chart, LV_CHART_AXIS_PRIMARY_Y, 10, 5, 6, 5, true, 40);
29 // lv_chart_set_axis_tick(chart, LV_CHART_AXIS_PRIMARY_X, 10, 5, 10, 1, true, 30);
30
31 lv_obj_add_event_cb(chart, value_changed_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
32 lv_obj_refresh_ext_draw_size(chart);
33
34 cursor = lv_chart_add_cursor(chart, lv_palette_main(LV_PALETTE_BLUE), LV_DIR_LEFT | LV_DIR_BOTTOM);
35
36 ser = lv_chart_add_series(chart, lv_palette_main(LV_PALETTE_RED), LV_CHART_AXIS_PRIMARY_Y);
37 uint32_t i;
38 for(i = 0; i < 10; i++) {
39 lv_chart_set_next_value(chart, ser, lv_rand(10, 90));
40 }
41
42 // lv_chart_set_scale_x(chart, 500);
43
44 lv_obj_t * label = lv_label_create(lv_screen_active());
45 lv_label_set_text(label, "Click on a point");
46 lv_obj_align_to(label, chart, LV_ALIGN_OUT_TOP_MID, 0, -5);
47 }
48
49 #endif
50
