初版
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huxi
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#ifdef SUPPORT_MS_EXTENSIONS
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#pragma bss_seg(".lv_ui_core.data.bss")
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#pragma data_seg(".lv_ui_core.data")
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#pragma const_seg(".lv_ui_core.text.const")
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#pragma code_seg(".lv_ui_core.text")
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#endif
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#include "../../lv_examples.h"
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#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
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static void slider_event_cb(lv_event_t *e);
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static lv_obj_t *slider_label;
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/**
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* A default slider with a label displaying the current value
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*/
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void lv_example_slider_1(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 = lv_slider_create(lv_scr_act());
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lv_obj_center(slider);
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lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
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/*Create a label below the slider*/
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slider_label = lv_label_create(lv_scr_act());
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lv_label_set_text(slider_label, "0%");
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lv_obj_align_to(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
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}
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static void slider_event_cb(lv_event_t *e)
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{
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lv_obj_t *slider = lv_event_get_target(e);
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char buf[8];
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lv_snprintf(buf, sizeof(buf), "%d%%", (int)lv_slider_get_value(slider));
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lv_label_set_text(slider_label, buf);
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lv_obj_align_to(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
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}
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#endif
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#ifdef SUPPORT_MS_EXTENSIONS
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#pragma bss_seg(".lv_ui_core.data.bss")
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#pragma data_seg(".lv_ui_core.data")
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#pragma const_seg(".lv_ui_core.text.const")
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#pragma code_seg(".lv_ui_core.text")
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#endif
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#include "../../lv_examples.h"
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#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
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/**
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* Show how to style a slider.
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*/
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void lv_example_slider_2(void)
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{
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/*Create a transition*/
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static const lv_style_prop_t props[] = {LV_STYLE_BG_COLOR, 0};
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static lv_style_transition_dsc_t transition_dsc;
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lv_style_transition_dsc_init(&transition_dsc, props, lv_anim_path_linear, 300, 0, NULL);
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static lv_style_t style_main;
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static lv_style_t style_indicator;
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static lv_style_t style_knob;
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static lv_style_t style_pressed_color;
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lv_style_init(&style_main);
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lv_style_set_bg_opa(&style_main, LV_OPA_COVER);
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lv_style_set_bg_color(&style_main, lv_color_hex3(0xbbb));
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lv_style_set_radius(&style_main, LV_RADIUS_CIRCLE);
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lv_style_set_pad_ver(&style_main, -2); /*Makes the indicator larger*/
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lv_style_init(&style_indicator);
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lv_style_set_bg_opa(&style_indicator, LV_OPA_COVER);
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lv_style_set_bg_color(&style_indicator, lv_palette_main(LV_PALETTE_CYAN));
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lv_style_set_radius(&style_indicator, LV_RADIUS_CIRCLE);
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lv_style_set_transition(&style_indicator, &transition_dsc);
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lv_style_init(&style_knob);
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lv_style_set_bg_opa(&style_knob, LV_OPA_COVER);
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lv_style_set_bg_color(&style_knob, lv_palette_main(LV_PALETTE_CYAN));
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lv_style_set_border_color(&style_knob, lv_palette_darken(LV_PALETTE_CYAN, 3));
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lv_style_set_border_width(&style_knob, 2);
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lv_style_set_radius(&style_knob, LV_RADIUS_CIRCLE);
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lv_style_set_pad_all(&style_knob, 6); /*Makes the knob larger*/
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lv_style_set_transition(&style_knob, &transition_dsc);
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lv_style_init(&style_pressed_color);
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lv_style_set_bg_color(&style_pressed_color, lv_palette_darken(LV_PALETTE_CYAN, 2));
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/*Create a slider and add the style*/
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lv_obj_t *slider = lv_slider_create(lv_scr_act());
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lv_obj_remove_style_all(slider); /*Remove the styles coming from the theme*/
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lv_obj_add_style(slider, &style_main, LV_PART_MAIN);
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lv_obj_add_style(slider, &style_indicator, LV_PART_INDICATOR);
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lv_obj_add_style(slider, &style_pressed_color, LV_PART_INDICATOR | LV_STATE_PRESSED);
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lv_obj_add_style(slider, &style_knob, LV_PART_KNOB);
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lv_obj_add_style(slider, &style_pressed_color, LV_PART_KNOB | LV_STATE_PRESSED);
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lv_obj_center(slider);
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}
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#endif
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@@ -0,0 +1,61 @@
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#ifdef SUPPORT_MS_EXTENSIONS
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#pragma bss_seg(".lv_ui_core.data.bss")
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#pragma data_seg(".lv_ui_core.data")
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#pragma const_seg(".lv_ui_core.text.const")
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#pragma code_seg(".lv_ui_core.text")
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#endif
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#include "../../lv_examples.h"
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#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
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static void slider_event_cb(lv_event_t *e);
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/**
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* Show the current value when the slider is pressed by extending the drawer
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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());
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lv_obj_center(slider);
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lv_slider_set_mode(slider, LV_SLIDER_MODE_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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lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_ALL, NULL);
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lv_obj_refresh_ext_draw_size(slider);
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}
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static void slider_event_cb(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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/*Provide some extra space for the value*/
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if (code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
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lv_event_set_ext_draw_size(e, 50);
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} else if (code == LV_EVENT_DRAW_PART_END) {
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lv_obj_draw_part_dsc_t *dsc = lv_event_get_draw_part_dsc(e);
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if (dsc->part == LV_PART_INDICATOR) {
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char buf[16];
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lv_snprintf(buf, sizeof(buf), "%d - %d", (int)lv_slider_get_left_value(obj), (int)lv_slider_get_value(obj));
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lv_point_t label_size;
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lv_txt_get_size(&label_size, buf, LV_FONT_DEFAULT, 0, 0, LV_COORD_MAX, 0);
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lv_area_t label_area;
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label_area.x1 = dsc->draw_area->x1 + lv_area_get_width(dsc->draw_area) / 2 - label_size.x / 2;
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label_area.x2 = label_area.x1 + label_size.x;
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label_area.y2 = dsc->draw_area->y1 - 10;
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label_area.y1 = label_area.y2 - label_size.y;
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lv_draw_label_dsc_t label_draw_dsc;
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lv_draw_label_dsc_init(&label_draw_dsc);
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label_draw_dsc.color = lv_color_hex3(0x888);
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lv_draw_label(dsc->draw_ctx, &label_draw_dsc, &label_area, buf, NULL);
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}
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}
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}
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#endif
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