70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
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#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_draw_part_dsc_t * dsc = lv_event_get_param(e);
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if(dsc->part != LV_PART_INDICATOR) return;
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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_txt_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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/*If the indicator is long enough put the text inside on the right*/
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if(lv_area_get_width(dsc->draw_area) > txt_size.x + 20) {
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txt_area.x2 = dsc->draw_area->x2 - 5;
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txt_area.x1 = txt_area.x2 - txt_size.x + 1;
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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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txt_area.x1 = dsc->draw_area->x2 + 5;
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txt_area.x2 = txt_area.x1 + txt_size.x - 1;
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label_dsc.color = lv_color_black();
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}
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txt_area.y1 = dsc->draw_area->y1 + (lv_area_get_height(dsc->draw_area) - txt_size.y) / 2;
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txt_area.y2 = txt_area.y1 + txt_size.y - 1;
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lv_draw_label(dsc->draw_ctx, &label_dsc, &txt_area, buf, NULL);
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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_scr_act());
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lv_obj_add_event_cb(bar, event_cb, LV_EVENT_DRAW_PART_END, NULL);
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lv_obj_set_size(bar, 200, 20);
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lv_obj_center(bar);
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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, 2000);
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lv_anim_set_playback_time(&a, 2000);
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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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