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40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
#include "../../../lvgl.h"
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#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
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static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
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/**
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* Show the current value when the slider if pressed (using only styles).
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*
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*/
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void lv_example_slider_3(void)
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{
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/* Create a slider in the center of the display */
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lv_obj_t * slider;
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slider = lv_slider_create(lv_scr_act(), NULL);
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lv_obj_align(slider, NULL, LV_ALIGN_CENTER, 0, 0);
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lv_obj_add_event_cb(slider, slider_event_cb, NULL);
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lv_slider_set_type(slider, LV_SLIDER_TYPE_RANGE);
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lv_slider_set_value(slider, 70, LV_ANIM_OFF);
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lv_slider_set_left_value(slider, 20, LV_ANIM_OFF);
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/*Now use only a local style.*/
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lv_obj_set_style_content_ofs_y(slider, LV_PART_INDICATOR, LV_STATE_DEFAULT, -20);
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lv_obj_set_style_content_color(slider, LV_PART_INDICATOR, LV_STATE_DEFAULT, lv_color_grey_darken_3());
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/*To update the value text*/
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lv_event_send(slider, LV_EVENT_VALUE_CHANGED, NULL);
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}
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static void slider_event_cb(lv_obj_t * slider, lv_event_t event)
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{
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if(event == LV_EVENT_VALUE_CHANGED) {
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static char buf[8];
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lv_snprintf(buf, sizeof(buf), "%d - %d", lv_slider_get_value(slider), lv_slider_get_left_value(slider));
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lv_obj_set_style_content_text(slider, LV_PART_INDICATOR, LV_STATE_DEFAULT, buf);
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}
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}
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#endif
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