1 #include "../../lv_examples.h" 2 #if LV_USE_BTNMATRIX && LV_BUILD_EXAMPLES 3 event_cb(lv_event_t * e)4static void event_cb(lv_event_t * e) 5 { 6 lv_event_code_t code = lv_event_get_code(e); 7 lv_obj_t * obj = lv_event_get_target(e); 8 if(code == LV_EVENT_DRAW_PART_BEGIN) { 9 lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e); 10 11 /*When the button matrix draws the buttons...*/ 12 if(dsc->class_p == &lv_btnmatrix_class && dsc->type == LV_BTNMATRIX_DRAW_PART_BTN) { 13 /*Change the draw descriptor of the 2nd button*/ 14 if(dsc->id == 1) { 15 dsc->rect_dsc->radius = 0; 16 if(lv_btnmatrix_get_selected_btn(obj) == dsc->id) dsc->rect_dsc->bg_color = lv_palette_darken(LV_PALETTE_BLUE, 3); 17 else dsc->rect_dsc->bg_color = lv_palette_main(LV_PALETTE_BLUE); 18 19 dsc->rect_dsc->shadow_width = 6; 20 dsc->rect_dsc->shadow_ofs_x = 3; 21 dsc->rect_dsc->shadow_ofs_y = 3; 22 dsc->label_dsc->color = lv_color_white(); 23 } 24 /*Change the draw descriptor of the 3rd button*/ 25 else if(dsc->id == 2) { 26 dsc->rect_dsc->radius = LV_RADIUS_CIRCLE; 27 if(lv_btnmatrix_get_selected_btn(obj) == dsc->id) dsc->rect_dsc->bg_color = lv_palette_darken(LV_PALETTE_RED, 3); 28 else dsc->rect_dsc->bg_color = lv_palette_main(LV_PALETTE_RED); 29 30 dsc->label_dsc->color = lv_color_white(); 31 } 32 else if(dsc->id == 3) { 33 dsc->label_dsc->opa = LV_OPA_TRANSP; /*Hide the text if any*/ 34 35 } 36 } 37 } 38 if(code == LV_EVENT_DRAW_PART_END) { 39 lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e); 40 41 /*When the button matrix draws the buttons...*/ 42 if(dsc->class_p == &lv_btnmatrix_class && dsc->type == LV_BTNMATRIX_DRAW_PART_BTN) { 43 /*Add custom content to the 4th button when the button itself was drawn*/ 44 if(dsc->id == 3) { 45 LV_IMG_DECLARE(img_star); 46 lv_img_header_t header; 47 lv_res_t res = lv_img_decoder_get_info(&img_star, &header); 48 if(res != LV_RES_OK) return; 49 50 lv_area_t a; 51 a.x1 = dsc->draw_area->x1 + (lv_area_get_width(dsc->draw_area) - header.w) / 2; 52 a.x2 = a.x1 + header.w - 1; 53 a.y1 = dsc->draw_area->y1 + (lv_area_get_height(dsc->draw_area) - header.h) / 2; 54 a.y2 = a.y1 + header.h - 1; 55 56 lv_draw_img_dsc_t img_draw_dsc; 57 lv_draw_img_dsc_init(&img_draw_dsc); 58 img_draw_dsc.recolor = lv_color_black(); 59 if(lv_btnmatrix_get_selected_btn(obj) == dsc->id) img_draw_dsc.recolor_opa = LV_OPA_30; 60 61 lv_draw_img(dsc->draw_ctx, &img_draw_dsc, &a, &img_star); 62 } 63 } 64 } 65 } 66 67 /** 68 * Add custom drawer to the button matrix to customize buttons one by one 69 */ lv_example_btnmatrix_2(void)70void lv_example_btnmatrix_2(void) 71 { 72 lv_obj_t * btnm = lv_btnmatrix_create(lv_scr_act()); 73 lv_obj_add_event_cb(btnm, event_cb, LV_EVENT_ALL, NULL); 74 lv_obj_center(btnm); 75 } 76 77 #endif 78
