acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_img_2.c (2451B)
      1 #include "../../lv_examples.h"
      2 #if LV_USE_IMG && LV_USE_SLIDER && LV_BUILD_EXAMPLES
      3 
      4 static lv_obj_t * create_slider(lv_color_t color);
      5 static void slider_event_cb(lv_event_t * e);
      6 
      7 static lv_obj_t * red_slider, * green_slider, * blue_slider, * intense_slider;
      8 static lv_obj_t * img1;
      9 
     10 
     11 /**
     12  * Demonstrate runtime image re-coloring
     13  */
     14 void lv_example_img_2(void)
     15 {
     16     /*Create 4 sliders to adjust RGB color and re-color intensity*/
     17     red_slider = create_slider(lv_palette_main(LV_PALETTE_RED));
     18     green_slider = create_slider(lv_palette_main(LV_PALETTE_GREEN));
     19     blue_slider = create_slider(lv_palette_main(LV_PALETTE_BLUE));
     20     intense_slider = create_slider(lv_palette_main(LV_PALETTE_GREY));
     21 
     22     lv_slider_set_value(red_slider, LV_OPA_20, LV_ANIM_OFF);
     23     lv_slider_set_value(green_slider, LV_OPA_90, LV_ANIM_OFF);
     24     lv_slider_set_value(blue_slider, LV_OPA_60, LV_ANIM_OFF);
     25     lv_slider_set_value(intense_slider, LV_OPA_50, LV_ANIM_OFF);
     26 
     27     lv_obj_align(red_slider, LV_ALIGN_LEFT_MID, 25, 0);
     28     lv_obj_align_to(green_slider, red_slider, LV_ALIGN_OUT_RIGHT_MID, 25, 0);
     29     lv_obj_align_to(blue_slider, green_slider, LV_ALIGN_OUT_RIGHT_MID, 25, 0);
     30     lv_obj_align_to(intense_slider, blue_slider, LV_ALIGN_OUT_RIGHT_MID, 25, 0);
     31 
     32     /*Now create the actual image*/
     33     LV_IMG_DECLARE(img_cogwheel_argb)
     34     img1 = lv_img_create(lv_scr_act());
     35     lv_img_set_src(img1, &img_cogwheel_argb);
     36     lv_obj_align(img1, LV_ALIGN_RIGHT_MID, -20, 0);
     37 
     38     lv_event_send(intense_slider, LV_EVENT_VALUE_CHANGED, NULL);
     39 }
     40 
     41 static void slider_event_cb(lv_event_t * e)
     42 {
     43     LV_UNUSED(e);
     44 
     45     /*Recolor the image based on the sliders' values*/
     46     lv_color_t color  = lv_color_make(lv_slider_get_value(red_slider), lv_slider_get_value(green_slider),
     47                                       lv_slider_get_value(blue_slider));
     48     lv_opa_t intense = lv_slider_get_value(intense_slider);
     49     lv_obj_set_style_img_recolor_opa(img1, intense, 0);
     50     lv_obj_set_style_img_recolor(img1, color, 0);
     51 }
     52 
     53 static lv_obj_t * create_slider(lv_color_t color)
     54 {
     55     lv_obj_t * slider = lv_slider_create(lv_scr_act());
     56     lv_slider_set_range(slider, 0, 255);
     57     lv_obj_set_size(slider, 10, 200);
     58     lv_obj_set_style_bg_color(slider, color, LV_PART_KNOB);
     59     lv_obj_set_style_bg_color(slider, lv_color_darken(color, LV_OPA_40), LV_PART_INDICATOR);
     60     lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
     61     return slider;
     62 }
     63 
     64 #endif