1 #include "../../lv_examples.h"
2 #if LV_USE_BUTTONMATRIX && LV_BUILD_EXAMPLES
3
event_cb(lv_event_t * e)4 static void event_cb(lv_event_t * e)
5 {
6 lv_obj_t * obj = lv_event_get_target(e);
7 lv_draw_task_t * draw_task = lv_event_get_draw_task(e);
8 lv_draw_dsc_base_t * base_dsc = lv_draw_task_get_draw_dsc(draw_task);
9 /*When the button matrix draws the buttons...*/
10 if(base_dsc->part == LV_PART_ITEMS) {
11 bool pressed = false;
12 if(lv_buttonmatrix_get_selected_button(obj) == base_dsc->id1 && lv_obj_has_state(obj, LV_STATE_PRESSED)) {
13 pressed = true;
14 }
15
16 /*Change the draw descriptor of the 2nd button*/
17 if(base_dsc->id1 == 1) {
18 lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
19 if(fill_draw_dsc) {
20 fill_draw_dsc->radius = 0;
21 if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_BLUE, 3);
22 else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_BLUE);
23 }
24 lv_draw_box_shadow_dsc_t * box_shadow_draw_dsc = lv_draw_task_get_box_shadow_dsc(draw_task);
25 if(box_shadow_draw_dsc) {
26 box_shadow_draw_dsc->width = 6;
27 box_shadow_draw_dsc->ofs_x = 3;
28 box_shadow_draw_dsc->ofs_y = 3;
29 }
30 lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
31 if(label_draw_dsc) {
32 label_draw_dsc->color = lv_color_white();
33 }
34
35 }
36 /*Change the draw descriptor of the 3rd button*/
37 else if(base_dsc->id1 == 2) {
38 lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
39 if(fill_draw_dsc) {
40 fill_draw_dsc->radius = LV_RADIUS_CIRCLE;
41 if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_RED, 3);
42 else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_RED);
43 }
44 }
45 else if(base_dsc->id1 == 3) {
46 lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
47 if(label_draw_dsc) {
48 label_draw_dsc->opa = 0;
49 }
50 if(lv_draw_task_get_type(draw_task) == LV_DRAW_TASK_TYPE_FILL) {
51 LV_IMAGE_DECLARE(img_star);
52 lv_image_header_t header;
53 lv_result_t res = lv_image_decoder_get_info(&img_star, &header);
54 if(res != LV_RESULT_OK) return;
55
56 lv_area_t a;
57 a.x1 = 0;
58 a.x2 = header.w - 1;
59 a.y1 = 0;
60 a.y2 = header.h - 1;
61 lv_area_t draw_task_area;
62 lv_draw_task_get_area(draw_task, &draw_task_area);
63 lv_area_align(&draw_task_area, &a, LV_ALIGN_CENTER, 0, 0);
64
65 lv_draw_image_dsc_t img_draw_dsc;
66 lv_draw_image_dsc_init(&img_draw_dsc);
67 img_draw_dsc.src = &img_star;
68 img_draw_dsc.recolor = lv_color_black();
69 if(pressed) img_draw_dsc.recolor_opa = LV_OPA_30;
70
71 lv_draw_image(base_dsc->layer, &img_draw_dsc, &a);
72
73 }
74 }
75 }
76 }
77
78 /**
79 * Add custom drawer to the button matrix to customize buttons one by one
80 */
lv_example_buttonmatrix_2(void)81 void lv_example_buttonmatrix_2(void)
82 {
83 lv_obj_t * btnm = lv_buttonmatrix_create(lv_screen_active());
84 lv_obj_add_event_cb(btnm, event_cb, LV_EVENT_DRAW_TASK_ADDED, NULL);
85 lv_obj_add_flag(btnm, LV_OBJ_FLAG_SEND_DRAW_TASK_EVENTS);
86 lv_obj_center(btnm);
87 }
88
89 #endif
90
