1 /**
2  * @file lv_templ.c
3  *
4  */
5 
6 /*********************
7  *      INCLUDES
8  *********************/
9 
10 /*********************
11  *      DEFINES
12  *********************/
13 
14 /**********************
15  *      TYPEDEFS
16  **********************/
17 
18 /*This typedef exists purely to keep -Wpedantic happy when the file is empty.*/
19 /*It can be removed.*/
20 typedef int _keep_pedantic_happy;
21 
22 /**********************
23  *  STATIC PROTOTYPES
24  **********************/
25 
26 /**********************
27  *  STATIC VARIABLES
28  **********************/
29 
30 /**********************
31  *      MACROS
32  **********************/
33 
34 /**********************
35  *   GLOBAL FUNCTIONS
36  **********************/
37 
38 /**********************
39  *   STATIC FUNCTIONS
40  **********************/
41 /**
42  * @file lv_gridnav.h
43  *
44  */
45 
46 #ifndef LV_GRIDFOCUS_H
47 #define LV_GRIDFOCUS_H
48 
49 #ifdef __cplusplus
50 extern "C" {
51 #endif
52 
53 /*********************
54  *      INCLUDES
55  *********************/
56 #include "../../../core/lv_obj.h"
57 
58 #if LV_USE_GRIDNAV
59 
60 /*********************
61  *      DEFINES
62  *********************/
63 
64 /**********************
65  *      TYPEDEFS
66  **********************/
67 typedef enum {
68     LV_GRIDNAV_CTRL_NONE = 0x0,
69 
70     /**
71      * If there is no next/previous object in a direction,
72      * the focus goes to the object in the next/previous row (on left/right keys)
73      * or first/last row (on up/down keys)
74      */
75     LV_GRIDNAV_CTRL_ROLLOVER = 0x1,
76 
77     /**
78      * If an arrow is pressed and the focused object can be scrolled in that direction
79      * then it will be scrolled instead of going to the next/previous object.
80      * If there is no more room for scrolling the next/previous object will be focused normally */
81     LV_GRIDNAV_CTRL_SCROLL_FIRST = 0x2,
82 
83 } lv_gridnav_ctrl_t;
84 
85 /**********************
86  * GLOBAL PROTOTYPES
87  **********************/
88 
89 /**
90  * Add grid navigation feature to an object. It expects the children to be arranged
91  * into a grid-like layout. Although it's not required to have pixel perfect alignment.
92  * This feature makes possible to use keys to navigate among the children and focus them.
93  * The keys other than arrows and press/release related events
94  * are forwarded to the focused child.
95  * @param obj       pointer to an object on which navigation should be applied.
96  * @param ctrl      control flags from `lv_gridnav_ctrl_t`.
97  */
98 void lv_gridnav_add(lv_obj_t * obj, lv_gridnav_ctrl_t ctrl);
99 
100 /**
101  * Remove the grid navigation support from an object
102  * @param obj       pointer to an object
103  */
104 void lv_gridnav_remove(lv_obj_t * obj);
105 
106 /**********************
107  *      MACROS
108  **********************/
109 #endif /*LV_USE_GRIDNAV*/
110 
111 #ifdef __cplusplus
112 } /*extern "C"*/
113 #endif
114 
115 #endif /*LV_GRIDFOCUS_H*/
116