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<script>
// supplementary functions to select2 control
////////////////////////////////////////////////////////////////////////////
/** getValues
* --- -- -- - - -
* Get selected value(s) of Select2 control
*
* @param arg: source-element
* @return (string) value(s) comma-separated
*/
function getValues(srcElm) {
var res;
var obj = srcElm.select2('data'); // get delected data array
if (obj.length === 0) return ''; // if empty list then nothig is selected
else {
var i = 0;
obj.forEach(function(elm){ // loop through object elements array
if (i) res += ',' + elm.id; // if not first item, prepend ',' befor value(id)
else res = elm.id; // else set (first) checked value
i++;
});
}
return res;
}
/** select2_set_text
* --- -- -- - - -
* select an (select2-)option by text
* onto a (single) select2 control
*
* @param control = jquery selector,
* @param t (string) = text of option
*/
function select2_set_text(control, t) {
opts = control.select2()[0].options;
var id;
for(i=0; i<opts.length; i++) { if (opts[i].text == t) id = i; }
control.val(id).trigger('change');
}
/** get_id_of_text
* --- -- -- - - -
* get id (=value) of an option with `t` as text
* onto a select2 control;
*
* Can be used on single or multiple select2 contols
*
* @param control = jquery selector,
* @param t (string) = text of option
*/
function get_id_of_text( control , t) {
opts = control.select2()[0].options;
var id = false;
for(i=0; i<opts.length; i++) { if (opts[i].text == t) id = i; }
return id;
}
/** select2_set_multi_text
* --- -- -- - - -
* select several (select2-)options by text
*
* @param control = jquery selector,
* @param t_list (string) = list of selected texts
*/
function select2_set_multi_text(control, t_list) { /* define function */
var ids = [];
t_list.forEach (t => { let id = get_id_of_text(control, t);
if (id !== false) ids.push(id);
})
control.val(ids).change();
}
/** selected_text
* --- -- -- - - -
* get selected text of a select2 control
*/
function selected_text(control) {
if (typeof control.select2('data') === 'undefined') return false;
else if (control.select2('data').length == 0) return false;
else return control.select2('data')[0].text;
}
/**
* get all selected texts from a multi-select2 contol
*/
function selected_multitexts(control) {
if (typeof control.select2('data') === 'undefined') return false;
else if (control.select2('data').length == 0) return false;
else {
var result = [];
control.select2('data').forEach( item => { result.push(item.text); });
return result;
}
}
</script>
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