Roo/form/Select.js

/*
 * Based on:
 * Ext JS Library 1.1.1
 * Copyright(c) 2006-2007, Ext JS, LLC.
 *
 * Originally Released Under LGPL - original licence link has changed is not relivant.
 *
 * Fork - LGPL
 * <script type="text/javascript">
 */


/**
 * @class Roo.form.ComboBox
 * @extends Roo.form.TriggerField
 * A combobox control with support for autocomplete, remote-loading, paging and many other features.
 * @constructor
 * Create a new ComboBox.
 * @param {Object} config Configuration options
 */
Roo.form.Select = function(config){
    Roo.form.Select.superclass.constructor.call(this, config);

};

Roo.extend(Roo.form.Select , Roo.form.ComboBox, {
    /**
     * @cfg {String/HTMLElement/Element} transform The id, DOM node or element of an existing select to convert to a ComboBox
     */
    /**
     * @cfg {Boolean} lazyRender True to prevent the ComboBox from rendering until requested (should always be used when
     * rendering into an Roo.Editor, defaults to false)
     */
    /**
     * @cfg {Boolean/Object} autoCreate A DomHelper element spec, or true for a default element spec (defaults to:
     * {tag: "input", type: "text", size: "24", autocomplete: "off"})
     */
    /**
     * @cfg {Roo.data.Store} store The data store to which this combo is bound (defaults to undefined)
     */
    /**
     * @cfg {String} title If supplied, a header element is created containing this text and added into the top of
     * the dropdown list (defaults to undefined, with no header element)
     */

     /**
     * @cfg {String/Roo.Template} tpl The template to use to render the output
     */

    // private
    defaultAutoCreate : {tag: "select"  },
    /**
     * @cfg {Number} listWidth The width in pixels of the dropdown list (defaults to the width of the ComboBox field)
     */
    listWidth: undefined,
    /**
     * @cfg {String} displayField The underlying data field name to bind to this CombBox (defaults to undefined if
     * mode = 'remote' or 'text' if mode = 'local')
     */
    displayField: undefined,
    /**
     * @cfg {String} valueField The underlying data value name to bind to this CombBox (defaults to undefined if
     * mode = 'remote' or 'value' if mode = 'local'). 
     * Note: use of a valueField requires the user make a selection
     * in order for a value to be mapped.
     */
    valueField: undefined,


    /**
     * @cfg {String} hiddenName If specified, a hidden form field with this name is dynamically generated to store the
     * field's data value (defaults to the underlying DOM element's name)
     */
    hiddenName: undefined,
    /**
     * @cfg {String} listClass CSS class to apply to the dropdown list element (defaults to '')
     */
    listClass: '',
    /**
     * @cfg {String} selectedClass CSS class to apply to the selected item in the dropdown list (defaults to 'x-combo-selected')
     */
    selectedClass: 'x-combo-selected',
    /**
     * @cfg {String} triggerClass An additional CSS class used to style the trigger button.  The trigger will always get the
     * class 'x-form-trigger' and triggerClass will be <b>appended</b> if specified (defaults to 'x-form-arrow-trigger'
     * which displays a downward arrow icon).
     */
    triggerClass : 'x-form-arrow-trigger',
    /**
     * @cfg {Boolean/String} shadow True or "sides" for the default effect, "frame" for 4-way shadow, and "drop" for bottom-right
     */
    shadow:'sides',
    /**
     * @cfg {String} listAlign A valid anchor position value. See {@link Roo.Element#alignTo} for details on supported
     * anchor positions (defaults to 'tl-bl')
     */
    listAlign: 'tl-bl?',
    /**
     * @cfg {Number} maxHeight The maximum height in pixels of the dropdown list before scrollbars are shown (defaults to 300)
     */
    maxHeight: 300,
    /**
     * @cfg {String} triggerAction The action to execute when the trigger field is activated.  Use 'all' to run the
     * query specified by the allQuery config option (defaults to 'query')
     */
    triggerAction: 'query',
    /**
     * @cfg {Number} minChars The minimum number of characters the user must type before autocomplete and typeahead activate
     * (defaults to 4, does not apply if editable = false)
     */
    minChars : 4,
    /**
     * @cfg {Boolean} typeAhead True to populate and autoselect the remainder of the text being typed after a configurable
     * delay (typeAheadDelay) if it matches a known value (defaults to false)
     */
    typeAhead: false,
    /**
     * @cfg {Number} queryDelay The length of time in milliseconds to delay between the start of typing and sending the
     * query to filter the dropdown list (defaults to 500 if mode = 'remote' or 10 if mode = 'local')
     */
    queryDelay: 500,
    /**
     * @cfg {Number} pageSize If greater than 0, a paging toolbar is displayed in the footer of the dropdown list and the
     * filter queries will execute with page start and limit parameters.  Only applies when mode = 'remote' (defaults to 0)
     */
    pageSize: 0,
    /**
     * @cfg {Boolean} selectOnFocus True to select any existing text in the field immediately on focus.  Only applies
     * when editable = true (defaults to false)
     */
    selectOnFocus:false,
    /**
     * @cfg {String} queryParam Name of the query as it will be passed on the querystring (defaults to 'query')
     */
    queryParam: 'query',
    /**
     * @cfg {String} loadingText The text to display in the dropdown list while data is loading.  Only applies
     * when mode = 'remote' (defaults to 'Loading...')
     */
    loadingText: 'Loading...',
    /**
     * @cfg {Boolean} resizable True to add a resize handle to the bottom of the dropdown list (defaults to false)
     */
    resizable: false,
    /**
     * @cfg {Number} handleHeight The height in pixels of the dropdown list resize handle if resizable = true (defaults to 8)
     */
    handleHeight : 8,
    /**
     * @cfg {Boolean} editable False to prevent the user from typing text directly into the field, just like a
     * traditional select (defaults to true)
     */
    editable: true,
    /**
     * @cfg {String} allQuery The text query to send to the server to return all records for the list with no filtering (defaults to '')
     */
    allQuery: '',
    /**
     * @cfg {String} mode Set to 'local' if the ComboBox loads local data (defaults to 'remote' which loads from the server)
     */
    mode: 'remote',
    /**
     * @cfg {Number} minListWidth The minimum width of the dropdown list in pixels (defaults to 70, will be ignored if
     * listWidth has a higher value)
     */
    minListWidth : 70,
    /**
     * @cfg {Boolean} forceSelection True to restrict the selected value to one of the values in the list, false to
     * allow the user to set arbitrary text into the field (defaults to false)
     */
    forceSelection:false,
    /**
     * @cfg {Number} typeAheadDelay The length of time in milliseconds to wait until the typeahead text is displayed
     * if typeAhead = true (defaults to 250)
     */
    typeAheadDelay : 250,
    /**
     * @cfg {String} valueNotFoundText When using a name/value combo, if the value passed to setValue is not found in
     * the store, valueNotFoundText will be displayed as the field text if defined (defaults to undefined)
     */
    valueNotFoundText : undefined,

    /**
     * @cfg {String} defaultValue The value displayed after loading the store.
     */
    defaultValue: '',

    /**
     * @cfg {Boolean} blockFocus Prevents all focus calls, so it can work with things like HTML edtor bar
     */
    blockFocus : false,

    /**
     * @cfg {Boolean} disableClear Disable showing of clear button.
     */
    disableClear : false,
    /**
     * @cfg {Boolean} alwaysQuery  Disable caching of results, and always send query
     */
    alwaysQuery : false,

    //private
    addicon : false,
    editicon: false,

    // element that contains real text value.. (when hidden is used..)

    // private
    onRender : function(ct, position){
        Roo.form.Field.prototype.onRender.call(this, ct, position);

        if(this.store){
            this.store.on('beforeload', this.onBeforeLoad, this);
            this.store.on('load', this.onLoad, this);
            this.store.on('loadexception', this.onLoadException, this);
            this.store.load({});
        }



    },

    // private
    initEvents : function(){
        //Roo.form.ComboBox.superclass.initEvents.call(this);

    },

    onDestroy : function(){

        if(this.store){
            this.store.un('beforeload', this.onBeforeLoad, this);
            this.store.un('load', this.onLoad, this);
            this.store.un('loadexception', this.onLoadException, this);
        }
        //Roo.form.ComboBox.superclass.onDestroy.call(this);
    },

    // private
    fireKey : function(e){
        if(e.isNavKeyPress() && !this.list.isVisible()){
            this.fireEvent("specialkey", this, e);
        }
    },

    // private
    onResize: function(w, h){

        return;


    },

    /**
     * Allow or prevent the user from directly editing the field text.  If false is passed,
     * the user will only be able to select from the items defined in the dropdown list.  This method
     * is the runtime equivalent of setting the 'editable' config option at config time.
     * @param {Boolean} value True to allow the user to directly edit the field text
     */
    setEditable : function(value){

    },

    // private
    onBeforeLoad : function(){

        Roo.log("Select before load");
        return;

        this.innerList.update(this.loadingText ?
               '<div class="loading-indicator">'+this.loadingText+'</div>' : '');
        //this.restrictHeight();
        this.selectedIndex = -1;
    },

    // private
    onLoad : function(){


        var dom = this.el.dom;
        dom.innerHTML = '';
         var od = dom.ownerDocument;

        if (this.emptyText) {
            var op = od.createElement('option');
            op.setAttribute('value', '');
            op.innerHTML = String.format('{0}', this.emptyText);
            dom.appendChild(op);
        }
        if(this.store.getCount() > 0){

            var vf = this.valueField;
            var df = this.displayField;
            this.store.data.each(function(r) {
                // which colmsn to use... testing - cdoe / title..
                var op = od.createElement('option');
                op.setAttribute('value', r.data[vf]);
                op.innerHTML = String.format('{0}', r.data[df]);
                dom.appendChild(op);
            });
            if (typeof(this.defaultValue != 'undefined')) {
                this.setValue(this.defaultValue);
            }


        }else{
            //this.onEmptyResults();
        }
        //this.el.focus();
    },
    // private
    onLoadException : function()
    {
        dom.innerHTML = '';

        Roo.log("Select on load exception");
        return;

        this.collapse();
        Roo.log(this.store.reader.jsonData);
        if (this.store && typeof(this.store.reader.jsonData.errorMsg) != 'undefined') {
            Roo.MessageBox.alert("Error loading",this.store.reader.jsonData.errorMsg);
        }


    },
    // private
    onTypeAhead : function(){

    },

    // private
    onSelect : function(record, index){
        Roo.log('on select?');
        return;
        if(this.fireEvent('beforeselect', this, record, index) !== false){
            this.setFromData(index > -1 ? record.data : false);
            this.collapse();
            this.fireEvent('select', this, record, index);
        }
    },

    /**
     * Returns the currently selected field value or empty string if no value is set.
     * @return {String} value The selected value
     */
    getValue : function(){
        var dom = this.el.dom;
        this.value = dom.options[dom.selectedIndex].value;
        return this.value;

    },

    /**
     * Clears any text/value currently set in the field
     */
    clearValue : function(){
        this.value = '';
        this.el.dom.selectedIndex = this.emptyText ? 0 : -1;

    },

    /**
     * Sets the specified value into the field.  If the value finds a match, the corresponding record text
     * will be displayed in the field.  If the value does not match the data value of an existing item,
     * and the valueNotFoundText config option is defined, it will be displayed as the default field text.
     * Otherwise the field will be blank (although the value will still be set).
     * @param {String} value The value to match
     */
    setValue : function(v){
        var d = this.el.dom;
        for (var i =0; i < d.options.length;i++) {
            if (v == d.options[i].value) {
                d.selectedIndex = i;
                this.value = v;
                return;
            }
        }
        this.clearValue();
    },
    /**
     * @property {Object} the last set data for the element
     */

    lastData : false,
    /**
     * Sets the value of the field based on a object which is related to the record format for the store.
     * @param {Object} value the value to set as. or false on reset?
     */
    setFromData : function(o){
        Roo.log('setfrom data?');



    },
    // private
    reset : function(){
        this.clearValue();
    },
    // private
    findRecord : function(prop, value){

        return false;

        var record;
        if(this.store.getCount() > 0){
            this.store.each(function(r){
                if(r.data[prop] == value){
                    record = r;
                    return false;
                }
                return true;
            });
        }
        return record;
    },

    getName: function()
    {
        // returns hidden if it's set..
        if (!this.rendered) {return ''};
        return !this.hiddenName && this.el.dom.name  ? this.el.dom.name : (this.hiddenName || '');

    },




    // private
    onEmptyResults : function(){
        Roo.log('empty results');
        //this.collapse();
    },

    /**
     * Returns true if the dropdown list is expanded, else false.
     */
    isExpanded : function(){
        return false;
    },

    /**
     * Select an item in the dropdown list by its data value. This function does NOT cause the select event to fire.
     * The store must be loaded and the list expanded for this function to work, otherwise use setValue.
     * @param {String} value The data value of the item to select
     * @param {Boolean} scrollIntoView False to prevent the dropdown list from autoscrolling to display the
     * selected item if it is not currently in view (defaults to true)
     * @return {Boolean} True if the value matched an item in the list, else false
     */
    selectByValue : function(v, scrollIntoView){
        Roo.log('select By Value');
        return false;

        if(v !== undefined && v !== null){
            var r = this.findRecord(this.valueField || this.displayField, v);
            if(r){
                this.select(this.store.indexOf(r), scrollIntoView);
                return true;
            }
        }
        return false;
    },

    /**
     * Select an item in the dropdown list by its numeric index in the list. This function does NOT cause the select event to fire.
     * The store must be loaded and the list expanded for this function to work, otherwise use setValue.
     * @param {Number} index The zero-based index of the list item to select
     * @param {Boolean} scrollIntoView False to prevent the dropdown list from autoscrolling to display the
     * selected item if it is not currently in view (defaults to true)
     */
    select : function(index, scrollIntoView){
        Roo.log('select ');
        return  ;

        this.selectedIndex = index;
        this.view.select(index);
        if(scrollIntoView !== false){
            var el = this.view.getNode(index);
            if(el){
                this.innerList.scrollChildIntoView(el, false);
            }
        }
    },



    // private
    validateBlur : function(){

        return;

    },

    // private
    initQuery : function(){
        this.doQuery(this.getRawValue());
    },

    // private
    doForce : function(){
        if(this.el.dom.value.length > 0){
            this.el.dom.value =
                this.lastSelectionText === undefined ? '' : this.lastSelectionText;

        }
    },

    /**
     * Execute a query to filter the dropdown list.  Fires the beforequery event prior to performing the
     * query allowing the query action to be canceled if needed.
     * @param {String} query The SQL query to execute
     * @param {Boolean} forceAll True to force the query to execute even if there are currently fewer characters
     * in the field than the minimum specified by the minChars config option.  It also clears any filter previously
     * saved in the current store (defaults to false)
     */
    doQuery : function(q, forceAll){

        Roo.log('doQuery?');
        if(q === undefined || q === null){
            q = '';
        }
        var qe = {
            query: q,
            forceAll: forceAll,
            combo: this,
            cancel:false
        };
        if(this.fireEvent('beforequery', qe)===false || qe.cancel){
            return false;
        }
        q = qe.query;
        forceAll = qe.forceAll;
        if(forceAll === true || (q.length >= this.minChars)){
            if(this.lastQuery != q || this.alwaysQuery){
                this.lastQuery = q;
                if(this.mode == 'local'){
                    this.selectedIndex = -1;
                    if(forceAll){
                        this.store.clearFilter();
                    }else{
                        this.store.filter(this.displayField, q);
                    }
                    this.onLoad();
                }else{
                    this.store.baseParams[this.queryParam] = q;
                    this.store.load({
                        params: this.getParams(q)
                    });
                    this.expand();
                }
            }else{
                this.selectedIndex = -1;
                this.onLoad();
            }
        }
    },

    // private
    getParams : function(q){
        var p = {};
        //p[this.queryParam] = q;
        if(this.pageSize){
            p.start = 0;
            p.limit = this.pageSize;
        }
        return p;
    },

    /**
     * Hides the dropdown list if it is currently expanded. Fires the 'collapse' event on completion.
     */
    collapse : function(){

    },

    // private
    collapseIf : function(e){

    },

    /**
     * Expands the dropdown list if it is currently hidden. Fires the 'expand' event on completion.
     */
    expand : function(){

    } ,

    // private


    /** 
    * @cfg {Boolean} grow 
    * @hide 
    */
    /** 
    * @cfg {Number} growMin 
    * @hide 
    */
    /** 
    * @cfg {Number} growMax 
    * @hide 
    */
    /**
     * @hide
     * @method autoSize
     */

    setWidth : function()
    {

    },
    getResizeEl : function(){
        return this.el;
    }
});