source: branches/1.2/workflow/js/jscode/wf_select_option_multiple.js @ 1349

/*
* Add selected item of selectbox "from" to "to" and
* disable it in "from"
*/
function addOption(from, to, sort) {
        fromList = eval('document.forms[0].' + from);
        toList   = eval('document.forms[0].' + to);
        button   = eval('document.forms[0].btn_' + from);

        if(fromList.selectedIndex != -1 && !fromList.options[fromList.selectedIndex].disabled){
                txt = new String(fromList.options[fromList.selectedIndex].text);
                val = fromList.options[fromList.selectedIndex].value;

                toList.options[toList.length] = new Option(txt,val);
                fromList.options[fromList.selectedIndex].disabled = true;
                // if is IE, emulates disabled
                if(navigator.appName == "Microsoft Internet Explorer")
                        fromList.options[fromList.selectedIndex].style.color = "gray";
                fromList.selectedIndex = -1;
                $(button).disable();

                if(sort){
                        // sort selectbox "to"
                        sortOptions(to);
                }
        }
}

/*
* Remove selected options of selectbox "from" and enable them in selectbox "to"
*/
function removeOptions(from, to) {
        fromList = eval('document.forms[0].' + from);
        toList = eval('document.forms[0].' + to);
        // get color style of the selected option of fromList
        var color = fromList.options[fromList.selectedIndex].style.color;
        // walk through "from" list searching the selected items,
        // enable them in the "to" and remove from "from"
        for (i = 0; i < fromList.options.length; i++) {
                var current = fromList.options[i];
                if (current.selected) {
                        val = current.value;
                        for (j = 0; j < toList.options.length; j++){
                                if (toList.options[j].value == val){
                                        toList.options[j].disabled = false;
                                        // if is IE, emulates enabled
                                        if(navigator.appName == "Microsoft Internet Explorer")
                                                toList.options[j].style.color = color;
                                        break;
                                }
                        }
                        fromList.options[i] = null;
                        i--;
                }
        }
        button = eval('document.forms[0].btn_' + from);
        $(button).disable();
}

/*
* Check if there is a selected item in the selectbox objName and enable or disable its related button
*/
function enableButton(objName)
{
        select = eval('document.forms[0].' + objName);
        var buttonName = 'btn_' + objName;
        button = eval('document.forms[0].' + buttonName);
    if (select.selectedIndex != -1 && select.options[select.selectedIndex].value != -1){
                $(button).enable();
        } else {
                $(button).disable();
        }
}


/*
* Populate selectbox with the array elements
*/
function populateSelect(objName, array) {
        obj = eval('document.forms[0].' + objName);

        while(obj.firstChild)
                obj.removeChild(obj.firstChild);

        // walk through array and add elements to the selectbox
        for (i = 0; i < array.length; i++) {
                if( isArray(array[i]) ) {
                        obj.options[obj.length] = new Option(array[i].text, array[i].value);
                }
        }
}

/*
* Populate the selectboxes.
* @param objNameT      Top selectbox name
* @param arrayT        Array with the elements of the top selectbox
* @param sortT         Boolean value to sort the top selectbox
* @param objNameB      Bottom selectbox name
* @param arrayB        Array with the elements of the bottom selectbox
* @param sortB         Boolean value to sort the bottom selectbox
* @param bool execDiff This value indicates if the user wants to execute the diff function
*/
function populateSelects(objNameT, arrayT, sortT,
                                                 objNameB, arrayB, sortB,
                                                 execDiff) {
        if( isArray(arrayT) )
                populateSelect(objNameT, arrayT);

        if( isArray(arrayB) )
                populateSelect(objNameB, arrayB);

        if( sortT )
                sortOptions(objNameT);

        if( sortB )
                sortOptions(objNameB);

        if(execDiff)
                selectDiffMultiple( objNameB, objNameT )
}

/*
* Select all items in a selectbox.
*/
function selectAllOptions( objName ) {
        obj = eval('document.forms[0].' + objName);

        for(i = 0; i < obj.length; i++) {
                obj.options[i].selected = true;
        }
}

/*
* Check if the parameter is an array.
* Return true if it's an array, and false, if it's not.
*/
function isArray( obj ) {
        if (typeof obj == 'object') {
                var criterion = obj.constructor.toString().match(/array/i);
                return (criterion != null);
        }
        return false;
}

/*
* Get the values of a selectbox and return them in an array.
*/
function select2array(objName) {
        obj = eval('document.forms[0].' + objName);

        if(obj){
                array = new Array();

                for(i = 0; i < obj.length; i++) {
                        array[i] = new Array(2);
                        array[i].text  = obj.options[i].text;
                        array[i].value = obj.options[i].value;
                }

                return array;
        }
        return null;
}

/*
* Copy the values of an array to a selectbox.
*/
function array2select(array, objName) {
        obj = eval('document.forms[0].' + objName);

        if( isArray(array) ) {
                for(i = 0; i < obj.length; i++) {
                        obj.options[i].text  = array[i].text;
                        obj.options[i].value = array[i].value;
                }
        }
}

/*
* Redefine the javascript sort function.
* We need to compare the attributes a.text and b.text.
*/
function sortFunction(a, b) {
        if(a.text > b.text)
                return 1;
        if(a.text < b.text)
                return -1;
        return 0;
}

/*
* Sort the elements of a selectbox.
*/
function sortOptions(objName) {
        arrTexts = select2array(objName);
        arrTexts.sort(sortFunction);
        array2select(arrTexts, objName);
}

/*
* Difference between two selectboxes. Remove the elements of the objName2
* that are found in objName1.
*/
function selectDiffMultiple(objName1, objName2) {
        array1 = select2array(objName1);
        array2 = select2array(objName2);
        obj2 = eval('document.forms[0].' + objName2);

        for( var i = 0; i < array1.length; i++ ) {
                for(var j = 0; j < array2.length; j++) {
                        if(array1[i].value == array2[j].value){
                                obj2.options[j].disabled = true;
                                // if is IE, emulates disabled
                                if(navigator.appName == "Microsoft Internet Explorer")
                                        obj2.options[j].style.color = "gray";
                                break;
                        }
                }
        }
}