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  1. #1
    Regular Coder
    Join Date
    Mar 2009
    Posts
    175
    Thanks
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    Thanked 1 Time in 1 Post

    How to pass new value to hidden input

    I'm working on an autocomplete script and have it working close to what I need, however I have an issues.

    I need to be able to pass a new value to the hidden field input, as it is now only selected values from the auto suggestions get's passed. I'm guessing I need to create some type of onchange or onclick event to do it but I'm not 100% sure how to go about it correctly. My first thought here is I should add a small + icon when clicked will add the new value.

    Here's the script I'm using:
    Code:
    /*
     * jQuery Plugin: Tokenizing Autocomplete Text Entry
     * Version 1.1
     *
     * Copyright (c) 2009 James Smith (http://loopj.com)
     * Licensed jointly under the GPL and MIT licenses,
     * choose which one suits your project best!
     *
     */
    
    (function($) {
    
    $.fn.tokenInput = function (url, options) {
        var settings = $.extend({
            url: url,
            hintText: "Type in a search term",
            noResultsText: "No results",
            searchingText: "Searching...",
            searchDelay: 300,
            minChars: 1,
            tokenLimit: null,
            jsonContainer: null,
            method: "GET",
            contentType: "json",
            queryParam: "q",
            onResult: null
        }, options);
    
        settings.classes = $.extend({
            tokenList: "token-input-list",
            token: "token-input-token",
            tokenDelete: "token-input-delete-token",
            selectedToken: "token-input-selected-token",
            highlightedToken: "token-input-highlighted-token",
            dropdown: "token-input-dropdown",
            dropdownItem: "token-input-dropdown-item",
            dropdownItem2: "token-input-dropdown-item2",
            selectedDropdownItem: "token-input-selected-dropdown-item",
            inputToken: "token-input-input-token"
        }, options.classes);
    
        return this.each(function () {
            var list = new $.TokenList(this, settings);
        });
    };
    
    $.TokenList = function (input, settings) {
        //
        // Variables
        //
    
        // Input box position "enum"
        var POSITION = {
            BEFORE: 0,
            AFTER: 1,
            END: 2
        };
    
        // Keys "enum"
        var KEY = {
            BACKSPACE: 8,
            TAB: 9,
            RETURN: 13,
            ESC: 27,
            LEFT: 37,
            UP: 38,
            RIGHT: 39,
            DOWN: 40,
            COMMA: 188
        };
    
        // Save the tokens
        var saved_tokens = [];
        
        // Keep track of the number of tokens in the list
        var token_count = 0;
    
        // Basic cache to save on db hits
        var cache = new $.TokenList.Cache();
    
        // Keep track of the timeout
        var timeout;
    
        // Create a new text input an attach keyup events
        var input_box = $("<input type=\"text\">")
            .css({
                outline: "none"
            })
            .focus(function () {
                if (settings.tokenLimit == null || settings.tokenLimit != token_count) {
                    show_dropdown_hint();
                }
            })
            .blur(function () {
                hide_dropdown();
            })
            .keydown(function (event) {
                var previous_token;
                var next_token;
    
                switch(event.keyCode) {
                    case KEY.LEFT:
                    case KEY.RIGHT:
                    case KEY.UP:
                    case KEY.DOWN:
                        if(!$(this).val()) {
                            previous_token = input_token.prev();
                            next_token = input_token.next();
    
                            if((previous_token.length && previous_token.get(0) === selected_token) || (next_token.length && next_token.get(0) === selected_token)) {
                                // Check if there is a previous/next token and it is selected
                                if(event.keyCode == KEY.LEFT || event.keyCode == KEY.UP) {
                                    deselect_token($(selected_token), POSITION.BEFORE);
                                } else {
                                    deselect_token($(selected_token), POSITION.AFTER);
                                }
                            } else if((event.keyCode == KEY.LEFT || event.keyCode == KEY.UP) && previous_token.length) {
                                // We are moving left, select the previous token if it exists
                                select_token($(previous_token.get(0)));
                            } else if((event.keyCode == KEY.RIGHT || event.keyCode == KEY.DOWN) && next_token.length) {
                                // We are moving right, select the next token if it exists
                                select_token($(next_token.get(0)));
                            }
                        } else {
                            var dropdown_item = null;
    
                            if(event.keyCode == KEY.DOWN || event.keyCode == KEY.RIGHT) {
                                dropdown_item = $(selected_dropdown_item).next();
                            } else {
                                dropdown_item = $(selected_dropdown_item).prev();
                            }
    
                            if(dropdown_item.length) {
                                select_dropdown_item(dropdown_item);
                            }
                            return false;
                        }
                        break;
    
                    case KEY.BACKSPACE:
                        previous_token = input_token.prev();
    
                        if(!$(this).val().length) {
                            if(selected_token) {
                                delete_token($(selected_token));
                            } else if(previous_token.length) {
                                select_token($(previous_token.get(0)));
                            }
    
                            return false;
                        } else if($(this).val().length == 1) {
                            hide_dropdown();
                        } else {
                            // set a timeout just long enough to let this function finish.
                            setTimeout(function(){do_search(false);}, 5);
                        }
                        break;
    
                    case KEY.TAB:
                    case KEY.RETURN:
                    case KEY.COMMA:
                      if(selected_dropdown_item) {
                        add_token($(selected_dropdown_item));
                        return false;
                      }
                      break;
    
                    case KEY.ESC:
                      hide_dropdown();
                      return true;
    
                    default:
                        if(is_printable_character(event.keyCode)) {
                          // set a timeout just long enough to let this function finish.
                          setTimeout(function(){do_search(false);}, 5);
                        }
                        break;
                }
            });
    
        // Keep a reference to the original input box
        var hidden_input = $(input)
                               .hide()
                               .focus(function () {
                                   input_box.focus();
                               })
                               .blur(function () {
                                   input_box.blur();
                               });
    
        // Keep a reference to the selected token and dropdown item
        var selected_token = null;
        var selected_dropdown_item = null;
    
        // The list to store the token items in
        var token_list = $("<ul />")
            .addClass(settings.classes.tokenList)
            .insertAfter(hidden_input)
            .click(function (event) {
                var li = get_element_from_event(event, "li");
                if(li && li.get(0) != input_token.get(0)) {
                    toggle_select_token(li);
                    return false;
                } else {
                    input_box.focus();
    
                    if(selected_token) {
                        deselect_token($(selected_token), POSITION.END);
                    }
                }
            })
            .mouseover(function (event) {
                var li = get_element_from_event(event, "li");
                if(li && selected_token !== this) {
                    li.addClass(settings.classes.highlightedToken);
                }
            })
            .mouseout(function (event) {
                var li = get_element_from_event(event, "li");
                if(li && selected_token !== this) {
                    li.removeClass(settings.classes.highlightedToken);
                }
            })
            .mousedown(function (event) {
                // Stop user selecting text on tokens
                var li = get_element_from_event(event, "li");
                if(li){
                    return false;
                }
            });
    
    
        // The list to store the dropdown items in
        var dropdown = $("<div>")
            .addClass(settings.classes.dropdown)
            .insertAfter(token_list)
            .hide();
    
        // The token holding the input box
        var input_token = $("<li />")
            .addClass(settings.classes.inputToken)
            .appendTo(token_list)
            .append(input_box);
    
        init_list();
    
        //
        // Functions
        //
    
    
        // Pre-populate list if items exist
        function init_list () {
            li_data = settings.prePopulate;
            if(li_data && li_data.length) {
                for(var i in li_data) {
                    var this_token = $("<li><p>"+li_data[i].cb_activities+"</p> </li>")
                        .addClass(settings.classes.token)
                        .insertBefore(input_token);
    
                    $("<span>x</span>")
                        .addClass(settings.classes.tokenDelete)
                        .appendTo(this_token)
                        .click(function () {
                            delete_token($(this).parent());
                            return false;
                        });
    
                    $.data(this_token.get(0), "tokeninput", {"cb_activities": li_data[i].cb_activities});
    
                    // Clear input box and make sure it keeps focus
                    input_box
                        .val("")
                        .focus();
    
                    // Don't show the help dropdown, they've got the idea
                    hide_dropdown();
    
                    // Save this token id
                    var id_string = li_data[i].cb_activities + ","
                    hidden_input.val(hidden_input.val() + id_string);
                }
            }
        }
    
        function is_printable_character(keycode) {
            if((keycode >= 48 && keycode <= 90) ||      // 0-1a-z
               (keycode >= 96 && keycode <= 111) ||     // numpad 0-9 + - / * .
               (keycode >= 186 && keycode <= 192) ||    // ; = , - . / ^
               (keycode >= 219 && keycode <= 222)       // ( \ ) '
              ) {
                  return true;
              } else {
                  return false;
              }
        }
    
        // Get an element of a particular type from an event (click/mouseover etc)
        function get_element_from_event (event, element_type) {
            var target = $(event.target);
            var element = null;
    
            if(target.is(element_type)) {
                element = target;
            } else if(target.parent(element_type).length) {
                element = target.parent(element_type+":first");
            }
    
            return element;
        }
    
        // Inner function to a token to the list
        function insert_token(value) {
          var this_token = $("<li><p>"+ value +"</p> </li>")
          .addClass(settings.classes.token)
          .insertBefore(input_token);
    
          // The 'delete token' button
          $("<span>x</span>")
              .addClass(settings.classes.tokenDelete)
              .appendTo(this_token)
              .click(function () {
                  delete_token($(this).parent());
                  return false;
              });
    
          $.data(this_token.get(0), "tokeninput", {"cb_activities": value});
    
          return this_token;
        }
    
        // Add a token to the token list based on user input
        function add_token (item) {
            var li_data = $.data(item.get(0), "tokeninput");
            var this_token = insert_token(li_data.cb_activities);
    
            // Clear input box and make sure it keeps focus
            input_box
                .val("")
                .focus();
    
            // Don't show the help dropdown, they've got the idea
            hide_dropdown();
    
            // Save this token id
            var id_string = li_data.cb_activities + ","
            hidden_input.val(hidden_input.val() + id_string);
            
            token_count++;
            
            if(settings.tokenLimit != null && settings.tokenLimit >= token_count) {
                input_box.hide();
                hide_dropdown();
            }
        }
    
        // Select a token in the token list
        function select_token (token) {
            token.addClass(settings.classes.selectedToken);
            selected_token = token.get(0);
    
            // Hide input box
            input_box.val("");
    
            // Hide dropdown if it is visible (eg if we clicked to select token)
            hide_dropdown();
        }
    
        // Deselect a token in the token list
        function deselect_token (token, position) {
            token.removeClass(settings.classes.selectedToken);
            selected_token = null;
    
            if(position == POSITION.BEFORE) {
                input_token.insertBefore(token);
            } else if(position == POSITION.AFTER) {
                input_token.insertAfter(token);
            } else {
                input_token.appendTo(token_list);
            }
    
            // Show the input box and give it focus again
            input_box.focus();
        }
    
        // Toggle selection of a token in the token list
        function toggle_select_token (token) {
            if(selected_token == token.get(0)) {
                deselect_token(token, POSITION.END);
            } else {
                if(selected_token) {
                    deselect_token($(selected_token), POSITION.END);
                }
                select_token(token);
            }
        }
    
        // Delete a token from the token list
        function delete_token (token) {
            // Remove the id from the saved list
            var token_data = $.data(token.get(0), "tokeninput");
    
            // Delete the token
            token.remove();
            selected_token = null;
    
            // Show the input box and give it focus again
            input_box.focus();
    
            // Delete this token's id from hidden input
            var str = hidden_input.val()
            var start = str.indexOf(token_data.cb_activities+",");
            var end = str.indexOf(",", start) + 1;
    
            if(end >= str.length) {
                hidden_input.val(str.slice(0, start));
            } else {
                hidden_input.val(str.slice(0, start) + str.slice(end, str.length));
            }
            
            token_count--;
            
            if (settings.tokenLimit != null) {
                input_box
                    .show()
                    .val("")
                    .focus();
            }
        }
    
        // Hide and clear the results dropdown
        function hide_dropdown () {
            dropdown.hide().empty();
            selected_dropdown_item = null;
        }
    
        function show_dropdown_searching () {
            dropdown
                .html("<p>"+settings.searchingText+"</p>")
                .show();
        }
    
        function show_dropdown_hint () {
            dropdown
                .html("<p>"+settings.hintText+"</p>")
                .show();
        }
    
        // Highlight the query part of the search term
    	function highlight_term(value, term) {
    		return value.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + term + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<b>$1</b>");
    	}
    
        // Populate the results dropdown with some results
        function populate_dropdown (query, results) {
            if(results.length) {
                dropdown.empty();
                var dropdown_ul = $("<ul>")
                    .appendTo(dropdown)
                    .mouseover(function (event) {
                        select_dropdown_item(get_element_from_event(event, "li"));
                    })
                    .mousedown(function (event) {
                        add_token(get_element_from_event(event, "li"));
                        return false;
                    })
                    .hide();
    
                for(var i in results) {
                    if (results.hasOwnProperty(i)) {
                        var this_li = $("<li>"+highlight_term(results[i].cb_activities, query)+"</li>")
                                          .appendTo(dropdown_ul);
    
                        if(i%2) {
                            this_li.addClass(settings.classes.dropdownItem);
                        } else {
                            this_li.addClass(settings.classes.dropdownItem2);
                        }
    
                        if(i == 0) {
                            select_dropdown_item(this_li);
                        }
    
                        $.data(this_li.get(0), "tokeninput", {"cb_activities": results[i].cb_activities});
                    }
                }
    
                dropdown.show();
                dropdown_ul.slideDown("fast");
    
            } else {
                dropdown
                    .html("<p>"+settings.noResultsText+"</p>")
                    .show();
            }
        }
    
        // Highlight an item in the results dropdown
        function select_dropdown_item (item) {
            if(item) {
                if(selected_dropdown_item) {
                    deselect_dropdown_item($(selected_dropdown_item));
                }
    
                item.addClass(settings.classes.selectedDropdownItem);
                selected_dropdown_item = item.get(0);
            }
        }
    
        // Remove highlighting from an item in the results dropdown
        function deselect_dropdown_item (item) {
            item.removeClass(settings.classes.selectedDropdownItem);
            selected_dropdown_item = null;
        }
    
        // Do a search and show the "searching" dropdown if the input is longer
        // than settings.minChars
        function do_search(immediate) {
            var query = input_box.val().toLowerCase();
    
            if (query && query.length) {
                if(selected_token) {
                    deselect_token($(selected_token), POSITION.AFTER);
                }
                if (query.length >= settings.minChars) {
                    show_dropdown_searching();
                    if (immediate) {
                        run_search(query);
                    } else {
                        clearTimeout(timeout);
                        timeout = setTimeout(function(){run_search(query);}, settings.searchDelay);
                    }
                } else {
                    hide_dropdown();
                }
            }
        }
    
        // Do the actual search
        function run_search(query) {
            var cached_results = cache.get(query);
            if(cached_results) {
                populate_dropdown(query, cached_results);
            } else {
    			var queryStringDelimiter = settings.url.indexOf("?") < 0 ? "?" : "&";
    			var callback = function(results) {
    			  if($.isFunction(settings.onResult)) {
    			      results = settings.onResult.call(this, results);
    			  }
                  cache.add(query, settings.jsonContainer ? results[settings.jsonContainer] : results);
                  populate_dropdown(query, settings.jsonContainer ? results[settings.jsonContainer] : results);
                };
                
                if(settings.method == "POST") {
    			    $.post(settings.url + queryStringDelimiter + settings.queryParam + "=" + query, {}, callback, settings.contentType);
    		    } else {
    		        $.get(settings.url + queryStringDelimiter + settings.queryParam + "=" + query, {}, callback, settings.contentType);
    		    }
            }
        }
    };
    
    // Really basic cache for the results
    $.TokenList.Cache = function (options) {
        var settings = $.extend({
            max_size: 50
        }, options);
    
        var data = {};
        var size = 0;
    
        var flush = function () {
            data = {};
            size = 0;
        };
    
        this.add = function (query, results) {
            if(size > settings.max_size) {
                flush();
            }
    
            if(!data[query]) {
                size++;
            }
    
            data[query] = results;
        };
    
        this.get = function (query) {
            return data[query];
        };
    };
    
    })(jQuery);

  • #2
    Regular Coder
    Join Date
    Mar 2009
    Posts
    175
    Thanks
    3
    Thanked 1 Time in 1 Post
    This is solved, I ditched the ui version and went with another script.


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