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61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
2 years ago
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#include "../../lv_examples.h"
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#if LV_USE_ROLLER && LV_FONT_MONTSERRAT_22 && LV_BUILD_EXAMPLES
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static void event_handler(lv_event_t * e)
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{
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lv_event_code_t code = lv_event_get_code(e);
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lv_obj_t * obj = lv_event_get_target(e);
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if(code == LV_EVENT_VALUE_CHANGED) {
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char buf[32];
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lv_roller_get_selected_str(obj, buf, sizeof(buf));
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LV_LOG_USER("Selected value: %s", buf);
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}
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}
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/**
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* Roller with various alignments and larger text in the selected area
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*/
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void lv_example_roller_2(void)
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{
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/*A style to make the selected option larger*/
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static lv_style_t style_sel;
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lv_style_init(&style_sel);
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lv_style_set_text_font(&style_sel, &lv_font_montserrat_22);
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const char * opts = "1\n2\n3\n4\n5\n6\n7\n8\n9\n10";
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lv_obj_t * roller;
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/*A roller on the left with left aligned text, and custom width*/
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roller = lv_roller_create(lv_scr_act());
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lv_roller_set_options(roller, opts, LV_ROLLER_MODE_NORMAL);
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lv_roller_set_visible_row_count(roller, 2);
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lv_obj_set_width(roller, 100);
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lv_obj_add_style(roller, &style_sel, LV_PART_SELECTED);
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lv_obj_set_style_text_align(roller, LV_TEXT_ALIGN_LEFT, 0);
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lv_obj_align(roller, LV_ALIGN_LEFT_MID, 10, 0);
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lv_obj_add_event_cb(roller, event_handler, LV_EVENT_ALL, NULL);
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lv_roller_set_selected(roller, 2, LV_ANIM_OFF);
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/*A roller on the middle with center aligned text, and auto (default) width*/
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roller = lv_roller_create(lv_scr_act());
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lv_roller_set_options(roller, opts, LV_ROLLER_MODE_NORMAL);
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lv_roller_set_visible_row_count(roller, 3);
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lv_obj_add_style(roller, &style_sel, LV_PART_SELECTED);
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lv_obj_align(roller, LV_ALIGN_CENTER, 0, 0);
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lv_obj_add_event_cb(roller, event_handler, LV_EVENT_ALL, NULL);
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lv_roller_set_selected(roller, 5, LV_ANIM_OFF);
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/*A roller on the right with right aligned text, and custom width*/
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roller = lv_roller_create(lv_scr_act());
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lv_roller_set_options(roller, opts, LV_ROLLER_MODE_NORMAL);
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lv_roller_set_visible_row_count(roller, 4);
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lv_obj_set_width(roller, 80);
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lv_obj_add_style(roller, &style_sel, LV_PART_SELECTED);
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lv_obj_set_style_text_align(roller, LV_TEXT_ALIGN_RIGHT, 0);
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lv_obj_align(roller, LV_ALIGN_RIGHT_MID, -10, 0);
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lv_obj_add_event_cb(roller, event_handler, LV_EVENT_ALL, NULL);
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lv_roller_set_selected(roller, 8, LV_ANIM_OFF);
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}
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#endif
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