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66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
#include "../../lv_examples.h"
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#if LV_USE_IMG && LV_USE_SLIDER && LV_BUILD_EXAMPLES
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static lv_obj_t * create_slider(lv_color_t color);
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static void slider_event_cb(lv_event_t * e);
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static lv_obj_t * red_slider, * green_slider, * blue_slider, * intense_slider;
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static lv_obj_t * img1;
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/**
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* Demonstrate runtime image re-coloring
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*/
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void lv_example_img_2(void)
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{
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/*Create 4 sliders to adjust RGB color and re-color intensity*/
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red_slider = create_slider(lv_color_red());
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green_slider = create_slider(lv_color_green());
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blue_slider = create_slider(lv_color_blue());
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intense_slider = create_slider(lv_color_grey());
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lv_slider_set_value(red_slider, LV_OPA_20, LV_ANIM_OFF);
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lv_slider_set_value(green_slider, LV_OPA_90, LV_ANIM_OFF);
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lv_slider_set_value(blue_slider, LV_OPA_60, LV_ANIM_OFF);
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lv_slider_set_value(intense_slider, LV_OPA_50, LV_ANIM_OFF);
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lv_obj_align(red_slider, LV_ALIGN_LEFT_MID, 25, 0);
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lv_obj_align_to(green_slider, red_slider, LV_ALIGN_OUT_RIGHT_MID, 25, 0);
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lv_obj_align_to(blue_slider, green_slider, LV_ALIGN_OUT_RIGHT_MID, 25, 0);
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lv_obj_align_to(intense_slider, blue_slider, LV_ALIGN_OUT_RIGHT_MID, 25, 0);
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/*Now create the actual image*/
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LV_IMG_DECLARE(img_cogwheel_argb)
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img1 = lv_img_create(lv_scr_act());
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lv_img_set_src(img1, &img_cogwheel_argb);
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lv_obj_align(img1, LV_ALIGN_RIGHT_MID, -20, 0);
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lv_event_send(intense_slider, LV_EVENT_VALUE_CHANGED, NULL);
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}
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static void slider_event_cb(lv_event_t * e)
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{
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lv_event_code_t code = lv_event_get_code(e);
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if(code == LV_EVENT_VALUE_CHANGED) {
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/*Recolor the image based on the sliders' values*/
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lv_color_t color = lv_color_make(lv_slider_get_value(red_slider), lv_slider_get_value(green_slider), lv_slider_get_value(blue_slider));
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lv_opa_t intense = lv_slider_get_value(intense_slider);
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lv_obj_set_style_img_recolor_opa(img1, intense, 0);
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lv_obj_set_style_img_recolor(img1, color, 0);
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}
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}
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static lv_obj_t * create_slider(lv_color_t color)
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{
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lv_obj_t * slider = lv_slider_create(lv_scr_act());
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lv_slider_set_range(slider, 0, 255);
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lv_obj_set_size(slider, 10, 200);
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lv_obj_set_style_bg_color(slider, color, LV_PART_KNOB);
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lv_obj_set_style_bg_color(slider, lv_color_darken(color, LV_OPA_40), LV_PART_INDICATOR);
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lv_obj_add_event_cb(slider, slider_event_cb, NULL);
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return slider;
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}
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#endif
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