mirror of
https://github.com/lvgl/lvgl.git
synced 2026-05-21 05:51:45 +08:00
Gabor Kiss-Vamosi
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
#include "../lv_examples.h"
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#if LV_BUILD_EXAMPLES && LV_USE_IMAGE
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#include "../../lvgl_private.h"
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static lv_style_t style_btn;
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/*Will be called when the styles of the base theme are already added
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to add new styles*/
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static void new_theme_apply_cb(lv_theme_t * th, lv_obj_t * obj)
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{
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LV_UNUSED(th);
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if(lv_obj_check_type(obj, &lv_button_class)) {
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lv_obj_add_style(obj, &style_btn, 0);
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}
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}
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static void on_display_delete(lv_event_t * e)
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{
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lv_display_t * display = (lv_display_t *) lv_event_get_target(e);
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lv_theme_t * display_theme = lv_display_get_theme(display);
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lv_theme_delete(display_theme);
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}
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static void new_theme_init_and_set(void)
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{
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lv_display_t * display = lv_display_get_default();
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/*Initialize the styles*/
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lv_style_init(&style_btn);
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lv_style_set_bg_color(&style_btn, lv_palette_main(LV_PALETTE_GREEN));
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lv_style_set_border_color(&style_btn, lv_palette_darken(LV_PALETTE_GREEN, 3));
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lv_style_set_border_width(&style_btn, 3);
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/* Initialize the new theme with the current theme as its parent
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* The user is responsible for freeing the theme when it's no longer needed */
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lv_theme_t * th_act = lv_display_get_theme(NULL);
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lv_theme_t * th_new = lv_theme_create();
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lv_theme_copy(th_new, th_act);
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lv_theme_set_parent(th_new, th_act);
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/*Set the style apply callback for the new theme*/
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lv_theme_set_apply_cb(th_new, new_theme_apply_cb);
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/*Assign the new theme to the current display*/
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lv_display_set_theme(display, th_new);
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/* Assign a delete event callback so that we can delete the theme when the display is deleted*/
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lv_display_add_event_cb(display, on_display_delete, LV_EVENT_DELETE, NULL);
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}
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/**
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* Extending the current theme
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*/
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void lv_example_style_15(void)
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{
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lv_obj_t * btn;
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lv_obj_t * label;
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btn = lv_button_create(lv_screen_active());
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lv_obj_align(btn, LV_ALIGN_TOP_MID, 0, 20);
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label = lv_label_create(btn);
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lv_label_set_text(label, "Original theme");
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new_theme_init_and_set();
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btn = lv_button_create(lv_screen_active());
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lv_obj_align(btn, LV_ALIGN_BOTTOM_MID, 0, -20);
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label = lv_label_create(btn);
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lv_label_set_text(label, "New theme");
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}
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#endif
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