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View Full Version : LovCombo Text field getting cleared automatically & Not able to Tab select DD Values



shipra007
24 Mar 2015, 3:36 AM
Hi,

I am using LovCombo Box. But am not able to select dropdown values with Tab Key. Also, while i am typing text in input field of LovCombo Box its automatically getting cleared. Please help me with it :(
PFB the LovCombo.js code i am using currently.

****************************************************************************

// vim: ts=4:sw=4:nu:fdc=4:nospell
/**
* Ext.ux.form.LovCombo, List of Values Combo
*
* @author Ing. Jozef Sakáloš
* @copyright (c) 2008, by Ing. Jozef Sakáloš
* @date 16. April 2008
* @version $Id: Ext.ux.form.LovCombo.js 285 2008-06-06 09:22:20Z jozo $
*
* @license Ext.ux.form.LovCombo.js is licensed under the terms of the Open Source
* LGPL 3.0 license. Commercial use is permitted to the extent that the
* code/component(s) do NOT become part of another Open Source or Commercially
* licensed development library or toolkit without explicit permission.
*
* License details: http://www.gnu.org/licenses/lgpl.html
*/

/*global Ext */

// add RegExp.escape if it has not been already added
if('function' !== typeof RegExp.escape) {
RegExp.escape = function(s) {
if('string' !== typeof s) {
return s;
}
// Note: if pasting from forum, precede ]/\ with backslash manually
return s.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
}; // eo function escape
}

// create namespace
Ext.ns('Ext.ux.form');

/**
*
* @class Ext.ux.form.LovCombo
* @extends Ext.form.ComboBox
*/
Ext.ux.form.LovCombo = Ext.extend(Ext.form.ComboBox, {

// {{{
// configuration options
/**
* @cfg {String} checkField name of field used to store checked state.
* It is automatically added to existing fields.
* Change it only if it collides with your normal field.
*/
checkField:'checked'

/**
* @cfg {String} separator separator to use between values and texts
*/
,separator:','

/**
* @cfg {String/Array} tpl Template for items.
* Change it only if you know what you are doing.
*/
// }}}
// {{{
,initComponent:function() {

// template with checkbox
if(!this.tpl) {
this.tpl =
'<tpl for=".">'
+'<div class="x-combo-list-item">'
+'<img src="' + Ext.BLANK_IMAGE_URL + '" '
+'class="ux-lovcombo-icon ux-lovcombo-icon-'
+'{[values.' + this.checkField + '?"checked":"unchecked"' + ']}">'
+'<div class="ux-lovcombo-item-text">{' + (this.displayField || 'text' )+ '}</div>'
+'</div>'
+'</tpl>'
;
}

// call parent
Ext.ux.form.LovCombo.superclass.initComponent.apply(this, arguments);

// install internal event handlers
this.on({
scope:this
,beforequery:this.onBeforeQuery
,blur:this.onRealBlur
});

// remove selection from input field
this.onLoad = this.onLoad.createSequence(function() {
if(this.el) {
var v = this.el.dom.value;
this.el.dom.value = '';
this.el.dom.value = v;
}
});

} // e/o function initComponent
// }}}
// {{{
/**
* Disables default tab key bahavior
* @private
*/
,initEvents:function() {
Ext.ux.form.LovCombo.superclass.initEvents.apply(this, arguments);

// disable default tab handling - does no good
this.keyNav.tab = false;

} // eo function initEvents
// }}}
// {{{
/**
* clears value
*/
,clearValue:function() {
this.value = '';
this.setRawValue(this.value);
this.store.clearFilter();
this.store.each(function(r) {
r.set(this.checkField, false);
}, this);
if(this.hiddenField) {
this.hiddenField.value = '';
}
this.applyEmptyText();
} // eo function clearValue
// }}}
// {{{
/**
* @return {String} separator (plus space) separated list of selected displayFields
* @private
*/
,getCheckedDisplay:function() {
var re = new RegExp(this.separator, "g");
return this.getCheckedValue(this.displayField).replace(re, this.separator + ' ');
} // eo function getCheckedDisplay
// }}}
// {{{
/**
* @return {String} separator separated list of selected valueFields
* @private
*/
,getCheckedValue:function(field) {
field = field || this.valueField;
var c = [];

// store may be filtered so get all records
var snapshot = this.store.snapshot || this.store.data;

snapshot.each(function(r) {
if(r.get(this.checkField)) {
c.push(r.get(field));
}
}, this);

return c.join(this.separator);
} // eo function getCheckedValue
// }}}
// {{{
/**
* beforequery event handler - handles multiple selections
* @param {Object} qe query event
* @private
*/
,onBeforeQuery:function(qe) {
qe.query = qe.query.replace(new RegExp(this.getCheckedDisplay() + '[ ' + this.separator + ']*'), '');
} // eo function onBeforeQuery
// }}}
// {{{
/**
* blur event handler - runs only when real blur event is fired
*/
,onRealBlur:function() {
this.list.hide();
var rv = this.getRawValue();
var rva = rv.split(new RegExp(RegExp.escape(this.separator) + ' *'));
var va = [];
var snapshot = this.store.snapshot || this.store.data;

// iterate through raw values and records and check/uncheck items
Ext.each(rva, function(v) {
snapshot.each(function(r) {
if(v === r.get(this.displayField)) {
va.push(r.get(this.valueField));
}
}, this);
}, this);
this.setValue(va.join(this.separator));
this.store.clearFilter();
} // eo function onRealBlur
// }}}
// {{{
/**
* Combo's onSelect override
* @private
* @param {Ext.data.Record} record record that has been selected in the list
* @param {Number} index index of selected (clicked) record
*/
,onSelect:function(record, index) {
if(this.fireEvent('beforeselect', this, record, index) !== false){

// toggle checked field
record.set(this.checkField, !record.get(this.checkField));

// display full list
if(this.store.isFiltered()) {
this.doQuery(this.allQuery);
}

// set (update) value and fire event
this.setValue(this.getCheckedValue());
this.fireEvent('select', this, record, index);
}
} // eo function onSelect
// }}}
// {{{
/**
* Sets the value of the LovCombo
* @param {Mixed} v value
*/
,setValue:function(v) {
if(v) {
v = '' + v;
if(this.valueField) {
this.store.clearFilter();
this.store.each(function(r) {
var checked = !(!v.match(
'(^|' + this.separator + ')' + RegExp.escape(r.get(this.valueField))
+'(' + this.separator + '|$)'))
;

r.set(this.checkField, checked);
}, this);
this.value = this.getCheckedValue();
this.setRawValue(this.getCheckedDisplay());
if(this.hiddenField) {
this.hiddenField.value = this.value;
}
}
else {
this.value = v;
this.setRawValue(v);
if(this.hiddenField) {
this.hiddenField.value = v;
}
}
if(this.el) {
this.el.removeClass(this.emptyClass);
}
}
else {
this.clearValue();
}
} // eo function setValue
// }}}
// {{{
/**
* Selects all items
*/
,selectAll:function() {
this.store.each(function(record){
// toggle checked field
record.set(this.checkField, true);
}, this);

//display full list
this.doQuery(this.allQuery);
this.setValue(this.getCheckedValue());
} // eo full selectAll
// }}}
// {{{
/**
* Deselects all items. Synonym for clearValue
*/
,deselectAll:function() {
this.clearValue();
} // eo full deselectAll
// }}}

}); // eo extend

// register xtype
Ext.reg('lovcombo', Ext.ux.form.LovCombo);

// eof
*************************************************************************

Gary Schlosberg
24 Mar 2015, 4:58 AM
I haven't used it myself, but you might check the forum thread to see if others have dealt with this.
http://www.sencha.com/forum/showthread.php?32692