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72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
#include "../../lv_examples.h"
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#if LV_USE_BAR && LV_BUILD_EXAMPLES
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static void set_value(void * bar, int32_t v)
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{
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lv_bar_set_value(bar, v, LV_ANIM_OFF);
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}
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static void event_cb(lv_event_t * e)
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{
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lv_obj_t * obj = lv_event_get_target(e);
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lv_draw_label_dsc_t label_dsc;
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lv_draw_label_dsc_init(&label_dsc);
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label_dsc.font = LV_FONT_DEFAULT;
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char buf[8];
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lv_snprintf(buf, sizeof(buf), "%d", (int)lv_bar_get_value(obj));
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lv_point_t txt_size;
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lv_text_get_size(&txt_size, buf, label_dsc.font, label_dsc.letter_space, label_dsc.line_space, LV_COORD_MAX,
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label_dsc.flag);
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lv_area_t txt_area;
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txt_area.x1 = 0;
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txt_area.x2 = txt_size.x - 1;
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txt_area.y1 = 0;
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txt_area.y2 = txt_size.y - 1;
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lv_bar_t * bar = (lv_bar_t *) obj;
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const lv_area_t * indic_area = &bar->indic_area;
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/*If the indicator is long enough put the text inside on the right*/
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if(lv_area_get_width(indic_area) > txt_size.x + 20) {
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lv_area_align(indic_area, &txt_area, LV_ALIGN_RIGHT_MID, -10, 0);
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label_dsc.color = lv_color_white();
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}
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/*If the indicator is still short put the text out of it on the right*/
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else {
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lv_area_align(indic_area, &txt_area, LV_ALIGN_OUT_RIGHT_MID, 10, 0);
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label_dsc.color = lv_color_black();
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}
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label_dsc.text = buf;
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label_dsc.text_local = true;
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lv_layer_t * layer = lv_event_get_layer(e);
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lv_draw_label(layer, &label_dsc, &txt_area);
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}
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/**
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* Custom drawer on the bar to display the current value
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*/
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void lv_example_bar_6(void)
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{
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lv_obj_t * bar = lv_bar_create(lv_screen_active());
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lv_obj_set_size(bar, 200, 20);
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lv_obj_center(bar);
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lv_obj_add_event(bar, event_cb, LV_EVENT_DRAW_MAIN_END, NULL);
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lv_anim_t a;
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lv_anim_init(&a);
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lv_anim_set_var(&a, bar);
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lv_anim_set_values(&a, 0, 100);
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lv_anim_set_exec_cb(&a, set_value);
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lv_anim_set_time(&a, 4000);
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lv_anim_set_playback_time(&a, 4000);
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lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
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lv_anim_start(&a);
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}
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#endif
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