/**
* Signal function of the switch
* @param sw pointer to a switch object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_sw_signal(lv_obj_t * sw, lv_signal_t sign, void * param)
{
lv_sw_ext_t * ext = lv_obj_get_ext_attr(sw);
/*Save the current (old) value before slider signal modifies it*/
int16_t old_val;
if(sign == LV_SIGNAL_PRESSING) old_val = ext->slider.drag_value;
else old_val = lv_slider_get_value(sw);
/*Do not let the slider to call the callback. The Switch will do it if required*/
lv_action_t slider_cb = ext->slider.action;
ext->slider.action = NULL;
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(sw, sign, param);
if(res != LV_RES_OK) return res;
if(sign == LV_SIGNAL_CLEANUP) {
/*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
}
else if(sign == LV_SIGNAL_PRESSING) {
int16_t act_val = ext->slider.drag_value;
if(act_val != old_val) ext->changed = 1;
}
else if(sign == LV_SIGNAL_PRESS_LOST) {
ext->changed = 0;
if(lv_sw_get_state(sw)) lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_on);
else lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_off);
}
else if(sign == LV_SIGNAL_RELEASED) {
if(ext->changed == 0) {
int16_t v = lv_slider_get_value(sw);
if(v == 0) lv_slider_set_value(sw, 1);
else lv_slider_set_value(sw, 0);
}
if(lv_sw_get_state(sw)) lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_on);
else lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_off);
if(slider_cb != NULL) slider_cb(sw);
ext->changed = 0;
}
/*Restore the callback*/
ext->slider.action = slider_cb;
return res;
}
/**
* Turn OFF the switch
* @param sw pointer to a switch object
*/
void lv_sw_off(lv_obj_t * sw)
{
lv_sw_ext_t * ext = lv_obj_get_ext_attr(sw);
lv_slider_set_value(sw, 0);
lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_off);
}
/**
* Turn ON the switch
* @param sw pointer to a switch object
*/
void lv_sw_on(lv_obj_t * sw)
{
lv_sw_ext_t * ext = lv_obj_get_ext_attr(sw);
lv_slider_set_value(sw, LV_SWITCH_SLIDER_ANIM_MAX);
lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_on);
}
/**
* Turn OFF the switch with an animation
* @param sw pointer to a switch object
*/
void lv_sw_off_anim(lv_obj_t * sw)
{
lv_sw_ext_t * ext = lv_obj_get_ext_attr(sw);
if(lv_sw_get_anim_time(sw) > 0) lv_sw_anim_to_value(sw, 0);
else lv_slider_set_value(sw, 0);
lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB, ext->style_knob_off);
}
static void chart_create(lv_obj_t *parent)
{
lv_page_set_style(parent, LV_PAGE_STYLE_BG, &lv_style_transp_fit);
lv_page_set_style(parent, LV_PAGE_STYLE_SCRL, &lv_style_transp_fit);
lv_page_set_scrl_fit(parent, false, false);
lv_page_set_scrl_height(parent, lv_obj_get_height(parent));
lv_page_set_sb_mode(parent, LV_SB_MODE_OFF);
static lv_style_t style_chart;
lv_style_copy(&style_chart, &lv_style_pretty);
style_chart.body.opa = LV_OPA_60;
style_chart.body.radius = 0;
style_chart.line.color = LV_COLOR_GRAY;
chart = lv_chart_create(parent, NULL);
lv_obj_set_size(chart, 2 * lv_obj_get_width(parent) / 3, lv_obj_get_height(parent) / 2);
lv_obj_align(chart, NULL, LV_ALIGN_IN_TOP_MID, 0, LV_DPI / 4);
lv_chart_set_type(chart, LV_CHART_TYPE_COLUMN);
lv_chart_set_style(chart, &style_chart);
lv_chart_set_series_opa(chart, LV_OPA_70);
lv_chart_series_t *ser1;
ser1 = lv_chart_add_series(chart, LV_COLOR_RED);
lv_chart_set_next(chart, ser1, 40);
lv_chart_set_next(chart, ser1, 30);
lv_chart_set_next(chart, ser1, 47);
lv_chart_set_next(chart, ser1, 59);
lv_chart_set_next(chart, ser1, 59);
lv_chart_set_next(chart, ser1, 31);
lv_chart_set_next(chart, ser1, 55);
lv_chart_set_next(chart, ser1, 70);
lv_chart_set_next(chart, ser1, 82);
/*Create a bar, an indicator and a knob style*/
static lv_style_t style_bar;
static lv_style_t style_indic;
static lv_style_t style_knob;
lv_style_copy(&style_bar, &lv_style_pretty);
style_bar.body.main_color = LV_COLOR_BLACK;
style_bar.body.grad_color = LV_COLOR_GRAY;
style_bar.body.radius = LV_RADIUS_CIRCLE;
style_bar.body.border.color = LV_COLOR_WHITE;
style_bar.body.opa = LV_OPA_60;
style_bar.body.padding.hor = 0;
style_bar.body.padding.ver = LV_DPI / 10;
lv_style_copy(&style_indic, &lv_style_pretty);
style_indic.body.grad_color = LV_COLOR_MARRON;
style_indic.body.main_color = LV_COLOR_RED;
style_indic.body.radius = LV_RADIUS_CIRCLE;
style_indic.body.shadow.width = LV_DPI / 10;
style_indic.body.shadow.color = LV_COLOR_RED;
style_indic.body.padding.hor = LV_DPI / 30;
style_indic.body.padding.ver = LV_DPI / 30;
lv_style_copy(&style_knob, &lv_style_pretty);
style_knob.body.radius = LV_RADIUS_CIRCLE;
style_knob.body.opa = LV_OPA_70;
/*Create a second slider*/
lv_obj_t *slider = lv_slider_create(parent, NULL);
lv_slider_set_style(slider, LV_SLIDER_STYLE_BG, &style_bar);
lv_slider_set_style(slider, LV_SLIDER_STYLE_INDIC, &style_indic);
lv_slider_set_style(slider, LV_SLIDER_STYLE_KNOB, &style_knob);
lv_obj_set_size(slider, lv_obj_get_width(chart), LV_DPI / 3);
lv_obj_align(slider, chart, LV_ALIGN_OUT_BOTTOM_MID, 0, (LV_VER_RES - chart->coords.y2 - lv_obj_get_height(slider)) / 2); /*Align to below the chart*/
lv_slider_set_action(slider, slider_action);
lv_slider_set_range(slider, 10, 1000);
lv_slider_set_value(slider, 700);
slider_action(slider); /*Simulate a user value set the refresh the chart*/
}
