1 #include "../lv_examples.h"
2 #if LV_BUILD_EXAMPLES && LV_USE_IMAGE
3 #include "../../lvgl_private.h"
4
5 static lv_style_t style_btn;
6
7 /*Will be called when the styles of the base theme are already added
8 to add new styles*/
new_theme_apply_cb(lv_theme_t * th,lv_obj_t * obj)9 static void new_theme_apply_cb(lv_theme_t * th, lv_obj_t * obj)
10 {
11 LV_UNUSED(th);
12
13 if(lv_obj_check_type(obj, &lv_button_class)) {
14 lv_obj_add_style(obj, &style_btn, 0);
15 }
16 }
17
new_theme_init_and_set(void)18 static void new_theme_init_and_set(void)
19 {
20 /*Initialize the styles*/
21 lv_style_init(&style_btn);
22 lv_style_set_bg_color(&style_btn, lv_palette_main(LV_PALETTE_GREEN));
23 lv_style_set_border_color(&style_btn, lv_palette_darken(LV_PALETTE_GREEN, 3));
24 lv_style_set_border_width(&style_btn, 3);
25
26 /*Initialize the new theme from the current theme*/
27 lv_theme_t * th_act = lv_display_get_theme(NULL);
28 static lv_theme_t th_new;
29 th_new = *th_act;
30
31 /*Set the parent theme and the style apply callback for the new theme*/
32 lv_theme_set_parent(&th_new, th_act);
33 lv_theme_set_apply_cb(&th_new, new_theme_apply_cb);
34
35 /*Assign the new theme to the current display*/
36 lv_display_set_theme(NULL, &th_new);
37 }
38
39 /**
40 * Extending the current theme
41 */
lv_example_style_14(void)42 void lv_example_style_14(void)
43 {
44 lv_obj_t * btn;
45 lv_obj_t * label;
46
47 btn = lv_button_create(lv_screen_active());
48 lv_obj_align(btn, LV_ALIGN_TOP_MID, 0, 20);
49
50 label = lv_label_create(btn);
51 lv_label_set_text(label, "Original theme");
52
53 new_theme_init_and_set();
54
55 btn = lv_button_create(lv_screen_active());
56 lv_obj_align(btn, LV_ALIGN_BOTTOM_MID, 0, -20);
57
58 label = lv_label_create(btn);
59 lv_label_set_text(label, "New theme");
60 }
61
62 #endif
63
