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https://github.com/lvgl/lvgl.git
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74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
#include "../../../lvgl.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_obj_t * obj, lv_event_t e)
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{
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if(e == LV_EVENT_DRAW_POST_END) {
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lv_bar_t * bar = (lv_bar_t *)obj;
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lv_draw_label_dsc_t dsc;
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lv_draw_label_dsc_init(&dsc);
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dsc.font = LV_FONT_DEFAULT;
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char buf[8];
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lv_snprintf(buf, sizeof(buf), "%d", 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, dsc.font, dsc.letter_space, dsc.line_space, LV_COORD_MAX, 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(&bar->indic_area) > txt_size.x + 20) {
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txt_area.x2 = bar->indic_area.x2 - 5;
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txt_area.x1 = txt_area.x2 - txt_size.x + 1;
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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 = bar->indic_area.x2 + 5;
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txt_area.x2 = txt_area.x1 + txt_size.x - 1;
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dsc.color = lv_color_black();
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}
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txt_area.y1 = bar->indic_area.y1 + (lv_area_get_height(&bar->indic_area) - txt_size.y) / 2;
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txt_area.y2 = txt_area.y1 + txt_size.y - 1;
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const lv_area_t * clip_area = lv_event_get_param();
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lv_draw_label(&txt_area, clip_area, &dsc, buf, NULL);
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}
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}
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/**
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* Custom drawer on 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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static lv_style_t style_bg;
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lv_style_init(&style_bg);
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lv_style_set_content_ofs_y(&style_bg, -3);
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lv_style_set_content_align(&style_bg, LV_ALIGN_OUT_TOP_MID);
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lv_obj_t * bar = lv_bar_create(lv_scr_act(), NULL);
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lv_obj_add_event_cb(bar, event_cb, NULL);
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lv_obj_set_size(bar, 200, 20);
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lv_obj_align(bar, NULL, LV_ALIGN_CENTER, 0, 0);
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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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