1 /**
2 * @file lv_theme.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9 #include "../../lvgl.h"
10
11 /*********************
12 * DEFINES
13 *********************/
14
15 /**********************
16 * TYPEDEFS
17 **********************/
18
19 /**********************
20 * STATIC PROTOTYPES
21 **********************/
22 static void apply_theme(lv_theme_t * th, lv_obj_t * obj);
23
24 /**********************
25 * STATIC VARIABLES
26 **********************/
27
28 /**********************
29 * MACROS
30 **********************/
31
32 /**********************
33 * GLOBAL FUNCTIONS
34 **********************/
35
lv_theme_get_from_obj(lv_obj_t * obj)36 lv_theme_t * lv_theme_get_from_obj(lv_obj_t * obj)
37 {
38 lv_disp_t * disp = obj ? lv_obj_get_disp(obj) : lv_disp_get_default();
39 return lv_disp_get_theme(disp);
40 }
41
42 /**
43 * Apply the active theme on an object
44 * @param obj pointer to an object
45 * @param name the name of the theme element to apply. E.g. `LV_THEME_BTN`
46 */
lv_theme_apply(lv_obj_t * obj)47 void lv_theme_apply(lv_obj_t * obj)
48 {
49 lv_theme_t * th = lv_theme_get_from_obj(obj);
50 if(th == NULL) return;
51
52 lv_obj_remove_style_all(obj);
53
54 apply_theme(th, obj); /*Apply the theme including the base theme(s)*/
55 }
56
57 /**
58 * Set a base theme for a theme.
59 * The styles from the base them will be added before the styles of the current theme.
60 * Arbitrary long chain of themes can be created by setting base themes.
61 * @param new_theme pointer to theme which base should be set
62 * @param base pointer to the base theme
63 */
lv_theme_set_parent(lv_theme_t * new_theme,lv_theme_t * base)64 void lv_theme_set_parent(lv_theme_t * new_theme, lv_theme_t * base)
65 {
66 new_theme->parent = base;
67 }
68
69 /**
70 * Set a callback for a theme.
71 * The callback is used to add styles to different objects
72 * @param theme pointer to theme which callback should be set
73 * @param cb pointer to the callback
74 */
lv_theme_set_apply_cb(lv_theme_t * theme,lv_theme_apply_cb_t apply_cb)75 void lv_theme_set_apply_cb(lv_theme_t * theme, lv_theme_apply_cb_t apply_cb)
76 {
77 theme->apply_cb = apply_cb;
78 }
79
lv_theme_get_font_small(lv_obj_t * obj)80 const lv_font_t * lv_theme_get_font_small(lv_obj_t * obj)
81 {
82 lv_theme_t * th = lv_theme_get_from_obj(obj);
83 return th ? th->font_small : LV_FONT_DEFAULT;
84 }
85
lv_theme_get_font_normal(lv_obj_t * obj)86 const lv_font_t * lv_theme_get_font_normal(lv_obj_t * obj)
87 {
88 lv_theme_t * th = lv_theme_get_from_obj(obj);
89 return th ? th->font_normal : LV_FONT_DEFAULT;
90 }
91
lv_theme_get_font_large(lv_obj_t * obj)92 const lv_font_t * lv_theme_get_font_large(lv_obj_t * obj)
93 {
94 lv_theme_t * th = lv_theme_get_from_obj(obj);
95 return th ? th->font_large : LV_FONT_DEFAULT;
96 }
97
lv_theme_get_color_primary(lv_obj_t * obj)98 lv_color_t lv_theme_get_color_primary(lv_obj_t * obj)
99 {
100 lv_theme_t * th = lv_theme_get_from_obj(obj);
101 return th ? th->color_primary : lv_palette_main(LV_PALETTE_BLUE_GREY);
102 }
103
lv_theme_get_color_secondary(lv_obj_t * obj)104 lv_color_t lv_theme_get_color_secondary(lv_obj_t * obj)
105 {
106 lv_theme_t * th = lv_theme_get_from_obj(obj);
107 return th ? th->color_secondary : lv_palette_main(LV_PALETTE_BLUE);
108 }
109
110 /**********************
111 * STATIC FUNCTIONS
112 **********************/
113
apply_theme(lv_theme_t * th,lv_obj_t * obj)114 static void apply_theme(lv_theme_t * th, lv_obj_t * obj)
115 {
116 if(th->parent) apply_theme(th->parent, obj);
117 if(th->apply_cb) th->apply_cb(th, obj);
118 }
119
