#include "../lv_examples.h" #if LV_BUILD_EXAMPLES && LV_USE_BTN && LV_USE_LABEL /** * Opacity and Transformations */ void lv_example_style_15(void) { lv_obj_t * btn; lv_obj_t * label; /*Normal button*/ btn = lv_btn_create(lv_scr_act()); lv_obj_set_size(btn, 100, 40); lv_obj_align(btn, LV_ALIGN_CENTER, 0, -70); label = lv_label_create(btn); lv_label_set_text(label, "Normal"); lv_obj_center(label); /*Set opacity *The button and the label is rendered to a layer first and that layer is blended*/ btn = lv_btn_create(lv_scr_act()); lv_obj_set_size(btn, 100, 40); lv_obj_set_style_opa(btn, LV_OPA_50, 0); lv_obj_align(btn, LV_ALIGN_CENTER, 0, 0); label = lv_label_create(btn); lv_label_set_text(label, "Opa:50%"); lv_obj_center(label); /*Set transformations *The button and the label is rendered to a layer first and that layer is transformed*/ btn = lv_btn_create(lv_scr_act()); lv_obj_set_size(btn, 100, 40); lv_obj_set_style_transform_angle(btn, 150, 0); /*15 deg*/ lv_obj_set_style_transform_zoom(btn, 256 + 64, 0); /*1.25x*/ lv_obj_set_style_transform_pivot_x(btn, 50, 0); lv_obj_set_style_transform_pivot_y(btn, 20, 0); lv_obj_set_style_opa(btn, LV_OPA_50, 0); lv_obj_align(btn, LV_ALIGN_CENTER, 0, 70); label = lv_label_create(btn); lv_label_set_text(label, "Transf."); lv_obj_center(label); } #endif