1 /**
2 * @file lv_demo_scroll.c
3 */
4
5 /*********************
6 * INCLUDES
7 *********************/
8 #include "lv_demo_scroll.h"
9
10 #if LV_USE_DEMO_SCROLL
11
12 /*********************
13 * DEFINES
14 *********************/
15
16 /**********************
17 * TYPEDEFS
18 **********************/
19
20 /**********************
21 * STATIC PROTOTYPES
22 **********************/
23 static lv_obj_t * switch_create(lv_obj_t * parent, const char * title, lv_obj_flag_t flag, bool en);
24 static void generic_switch_event_cb(lv_event_t * e);
25
26 /**********************
27 * STATIC VARIABLES
28 **********************/
29 static lv_obj_t * list;
30
31 /**********************
32 * MACROS
33 **********************/
34
35 /**********************
36 * GLOBAL FUNCTIONS
37 **********************/
lv_demo_scroll(void)38 void lv_demo_scroll(void)
39 {
40 lv_obj_t * panel = lv_obj_create(lv_screen_active());
41 lv_obj_set_style_shadow_width(panel, 16, 0);
42 lv_obj_set_style_shadow_offset_y(panel, 8, 0);
43 lv_obj_set_style_shadow_offset_x(panel, 4, 0);
44 lv_obj_set_style_shadow_opa(panel, LV_OPA_40, 0);
45
46 lv_obj_set_size(panel, lv_pct(70), lv_pct(90));
47 lv_obj_center(panel);
48 lv_obj_set_flex_flow(panel, LV_FLEX_FLOW_COLUMN);
49 lv_obj_set_flex_align(panel, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
50
51 list = lv_list_create(panel);
52 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image1.png");
53 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image2.png");
54 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image3.png");
55 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image4.png");
56 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image5.png");
57 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image6.png");
58 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image7.png");
59 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image8.png");
60 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image9.png");
61 lv_list_add_button(list, LV_SYMBOL_IMAGE, "Image10.png");
62
63 switch_create(panel, "Scrollable", LV_OBJ_FLAG_SCROLLABLE, true);
64 switch_create(panel, "Scroll chain", LV_OBJ_FLAG_SCROLL_CHAIN, true);
65 switch_create(panel, "Elastic scroll", LV_OBJ_FLAG_SCROLL_ELASTIC, true);
66 switch_create(panel, "Add scroll momentum", LV_OBJ_FLAG_SCROLL_MOMENTUM, true);
67
68 /*Show the switches first*/
69 lv_obj_move_foreground(list);
70
71 }
72
73 /**********************
74 * STATIC FUNCTIONS
75 **********************/
76
switch_create(lv_obj_t * parent,const char * title,lv_obj_flag_t flag,bool en)77 static lv_obj_t * switch_create(lv_obj_t * parent, const char * title, lv_obj_flag_t flag, bool en)
78 {
79 lv_obj_t * cont = lv_obj_create(parent);
80 lv_obj_remove_style_all(cont);
81 lv_obj_set_size(cont, lv_pct(100), LV_SIZE_CONTENT);
82 lv_obj_set_flex_flow(cont, LV_FLEX_FLOW_ROW);
83 lv_obj_set_flex_align(cont, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START);
84
85 lv_obj_t * label = lv_label_create(cont);
86 lv_label_set_text(label, title);
87 lv_obj_set_flex_grow(label, 1);
88
89 lv_obj_t * sw = lv_switch_create(cont);
90 lv_obj_add_event_cb(sw, generic_switch_event_cb, LV_EVENT_VALUE_CHANGED, (void *)((lv_uintptr_t) flag));
91 if(en) {
92 lv_obj_add_state(sw, LV_STATE_CHECKED);
93 lv_obj_add_flag(list, flag);
94 }
95 else {
96 lv_obj_remove_state(sw, LV_STATE_CHECKED);
97 lv_obj_remove_flag(list, flag);
98 }
99
100 return cont;
101 }
102
generic_switch_event_cb(lv_event_t * e)103 static void generic_switch_event_cb(lv_event_t * e)
104 {
105 lv_obj_t * sw = lv_event_get_target(e);
106 lv_obj_flag_t flag = (lv_obj_flag_t)((lv_uintptr_t)lv_event_get_user_data(e));
107
108 if(lv_obj_has_state(sw, LV_STATE_CHECKED)) lv_obj_add_flag(list, flag);
109 else lv_obj_remove_flag(list, flag);
110 }
111
112 #endif
113
