ExtJs这么多个版本号了。可就是不提供多选下拉框，老外不用这个玩意吗？
5都出来这么久了，新写的项目就用5吧，把曾经Extjs4.2的时搜到前人的CheckComb改巴改巴。能用了就赶紧贴上来，没有细致測试各种情况。
Ext.define('Ext.ux.CheckCombo', {
extend : 'Ext.form.field.ComboBox',
alias : 'widget.checkcombo',
multiSelect : true,
allSelector : false,
noData : true,
noDataText : 'No combo data',
addAllSelector : false,
allSelectorHidden : false,
enableKeyEvents : true,
afterExpandCheck : false,
allText : 'All',
oldValue : '',
listeners : {
/*
* uncomment if you want to reload store on every combo expand
* beforequery: function(qe) { this.store.removeAll(); delete
* qe.combo.lastQuery; },
*/
focus : function(cpt) {
cpt.oldValue = cpt.getValue();
}
},
createPicker : function() {
var me = this, picker, menuCls = Ext.baseCSSPrefix + 'menu', opts = Ext
.apply({
pickerField : me,
selectionModel : me.pickerSelectionModel,
floating : true,
hidden : true,
ownerCt : me.ownerCt,
cls : me.el.up('.' + menuCls) ? menuCls : '',
store : me.getPickerStore(),
displayField : me.displayField,
preserveScrollOnRefresh : true,
pageSize : me.pageSize,
tpl : [
'<tpl for=".">',
'<div class="x-boundlist-item" role="option"><span class="x-combo-checker"> </span> {'
+ me.displayField + '}</div>', '</tpl>']
}, me.listConfig, me.defaultListConfig);
picker = me.picker = Ext.create('Ext.view.BoundList', opts);
if (me.pageSize) {
picker.pagingToolbar.on('beforechange', me.onPageChange, me);
}
// We limit the height of the picker to fit in the space above
// or below this field unless the picker has its own ideas about that.
if (!picker.initialConfig.maxHeight) {
picker.on({
beforeshow : me.onBeforePickerShow,
scope : me
});
}
picker.getSelectionModel().on({
beforeselect : me.onBeforeSelect,
beforedeselect : me.onBeforeDeselect,
scope : me
});
picker.getNavigationModel().navigateOnSpace = false;
me.store.on('load', function(store) {
if (store.getTotalCount() == 0) {
me.allSelectorHidden = true;
if (me.allSelector != false)
me.allSelector.setStyle('display', 'none');
if (me.noData != false)
me.noData.setStyle('display', 'block');
} else {
me.allSelectorHidden = false;
if (me.allSelector != false)
me.allSelector.setStyle('display', 'block');
if (me.noData != false)
me.noData.setStyle('display', 'none');
}
});
return picker;
},
reset : function() {
var me = this;
me.setValue('');
},
setValue : function(value) {
this.value = value;
if (!value) {
if (this.allSelector != false)
this.allSelector.removeCls('x-boundlist-selected');
return this.callParent(arguments);
}
if (typeof value == 'string') {
var me = this, records = [], vals = value.split(',');
if (value == '') {
if (me.allSelector != false)
me.allSelector.removeCls('x-boundlist-selected');
} else {
if (vals.length == me.store.getCount() && vals.length != 0) {
if (me.allSelector != false)
me.allSelector.addCls('x-boundlist-selected');
else
me.afterExpandCheck = true;
}
}
Ext.each(vals, function(val) {
var record = me.store.getById(parseInt(val));
if (record)
records.push(record);
});
return me.setValue(records);
} else
return this.callParent(arguments);
},
getValue : function() {
if (typeof this.value == 'object')
return this.value.join(',');
else
return this.value;
},
getSubmitValue : function() {
return this.getValue();
},
expand : function() {
var me = this, bodyEl, picker, doc, collapseIf;
if (me.rendered && !me.isExpanded && !me.isDestroyed) {
bodyEl = me.bodyEl;
picker = me.getPicker();
doc = Ext.getDoc();
collapseIf = me.collapseIf;
picker.setMaxHeight(picker.initialConfig.maxHeight);
if (me.matchFieldWidth) {
picker.width = me.bodyEl.getWidth();
}
// Show the picker and set isExpanded flag. alignPicker only works
// if isExpanded.
picker.show();
me.isExpanded = true;
me.alignPicker();
bodyEl.addCls(me.openCls);
if (me.noData == false)
me.noData = picker.getEl().down('.x-boundlist-list-ct')
.insertHtml(
'beforeBegin',
'<div class="x-boundlist-item" role="option">'
+ me.noDataText + '</div>', true);
if (me.addAllSelector == true && me.allSelector == false) {
me.allSelector = picker
.getEl()
.down('.x-boundlist-list-ct')
.insertHtml(
'beforeBegin',
'<div class="x-boundlist-item" role="option"><span class="x-combo-checker"> </span> '
+ me.allText + '</div>', true);
me.allSelector.on('click', function(e) {
if (me.allSelector.hasCls('x-boundlist-selected')) {
me.allSelector
.removeCls('x-boundlist-selected');
me.setValue('');
me.fireEvent('select', me, []);
} else {
var records = [];
me.store.each(function(record) {
records.push(record);
});
me.allSelector.addCls('x-boundlist-selected');
me.select(records);
me.fireEvent('select', me, records);
}
});
if (me.allSelectorHidden == true)
me.allSelector.hide();
else
me.allSelector.show();
if (me.afterExpandCheck == true) {
me.allSelector.addCls('x-boundlist-selected');
me.afterExpandCheck = false;
}
}
// Collapse on touch outside this component tree.
// Because touch platforms do not focus document.body on touch
// so no focusleave would occur to trigger a collapse.
me.touchListeners = doc.on({
// Do not translate on non-touch platforms.
// mousedown will blur the field.
translate : false,
touchstart : me.collapseIf,
scope : me,
delegated : false,
destroyable : true
});
// Scrolling of anything which causes this field to move should
// collapse
me.scrollListeners = Ext.on({
scroll : me.onGlobalScroll,
scope : me,
destroyable : true
});
// monitor touch and mousewheel
me.hideListeners = doc.on({
mousewheel : me.collapseIf,
touchstart : me.collapseIf,
scope : me,
delegated : false,
destroyable : true
});
// Buffer is used to allow any layouts to complete before we align
Ext.on('resize', me.alignPicker, me, {
buffer : 1
});
me.fireEvent('expand', me);
me.onExpand();
} else {
me.fireEvent('expand', me);
me.onExpand();
}
},
onListSelectionChange : function(list, selectedRecords) {
var me = this, isMulti = me.multiSelect, hasRecords = selectedRecords.length > 0;
// Only react to selection if it is not called from setValue, and if our
// list is
// expanded (ignores changes to the selection model triggered elsewhere)
if (!me.ignoreSelection && me.isExpanded) {
if (!isMulti) {
Ext.defer(me.collapse, 1, me);
}
/*
* Only set the value here if we're in multi selection mode or we
* have a selection. Otherwise setValue will be called with an empty
* value which will cause the change event to fire twice.
*/
if (isMulti || hasRecords) {
me.setValue(selectedRecords, false);
}
if (hasRecords) {
me.fireEvent('select', me, selectedRecords);
}
me.inputEl.focus();
if (me.addAllSelector == true && me.allSelector != false) {
if (selectedRecords.length == me.store.getTotalCount())
me.allSelector.addCls('x-boundlist-selected');
else
me.allSelector.removeCls('x-boundlist-selected');
}
}
}
});还有相关的css啊，图片就自己找吧。我是把4里面的图片copy过来的:
/*ext多选下拉框样式，未选*/
.x-combo-checker {
background-position: 50% -2px;
margin-left: 1px;
background-color: transparent;
background-image:url(../thirdjs/extjs513/ext-theme-classic/images/unchecked.gif);
background-position: -1px -1px;
background-repeat: no-repeat;
height: 14px;
14px;
display: inline-block;
}
/*ext多选下拉框样式，已选*/
.x-boundlist-selected .x-combo-checker {
background-image:url(../thirdjs/extjs513/ext-theme-classic/images/checked.gif);
}