Question

ExtJS提供了一个具有许多功能的花哨的组合框 - 提前输入，允许随机输入文本，隐藏下拉列表中所有未加入已输入文本的条目。< / p>

我不想要这些功能。我想要一个选择框，其行为几乎与人们期望普通选择框在vanilla html中完全相同。

我确实希望它绑定到数据存储，我确实想要组合框附带的所有其他extjs配置好东西。我只是不希望用户/测试人员在遇到一个选择框时会惊慌失措，这个选择框打破了他们现有的这些工作方式的心理范式。

那么我怎样才能让extjs组合框更像选择框呢？或者我是否完全使用了错误的小部件？

Answer 1

在实例化Ext.form.ComboBox对象时，只需使用正确的配置即可获得该行为：

var selectStyleComboboxConfig = {
    fieldLabel: 'My Dropdown',
    name: 'type',
    allowBlank: false,
    editable: false,
    // This is the option required for "select"-style behaviour
    triggerAction: 'all',
    typeAhead: false,
    mode: 'local',
    width: 120,
    listWidth: 120,
    hiddenName: 'my_dropdown',
    store: [
        ['val1', 'First Value'],
        ['val2', 'Second Value']
    ],
    readOnly: true
};
var comboBox = new Ext.form.ComboBox(selectStyleComboboxConfig);

如果您希望将其绑定到mode: 'local'，请替换您的案例中的store和Ext.data.JsonStore参数。

Answer 2

当前接受的解决方案效果很好，但是如果有人想要一个也处理键盘输入的ComboBox，就像普通的HTML选择框一样（例如，每按一次“P”就会选择列表中以“P”开头的下一个项目），以下内容可能会有所帮助：

{
    xtype: 'combo',
    fieldLabel: 'Price',
    name: 'price',
    hiddenName: 'my_dropdown',
    autoSelect: false,
    allowBlank: false,
    editable: false,
    triggerAction: 'all',
    typeAhead: true,
    width:120,
    listWidth: 120,
    enableKeyEvents: true,
    mode: 'local',
    store: [
        ['val1', 'Appaloosa'],
        ['val2', 'Arabian'],
        ['val3', 'Clydesdale'],
        ['val4', 'Paint'],
        ['val5', 'Palamino'],
        ['val6', 'Quarterhorse'],
    ],
    listeners: {
        keypress: function(comboBoxObj, keyEventObj) {
            // Ext.Store names anonymous fields (like in array above) "field1", "field2", etc.
            var valueFieldName = "field1";
            var displayFieldName = "field2";

            // Which drop-down item is already selected (if any)?
            var selectedIndices = this.view.getSelectedIndexes();
            var currentSelectedIndex = (selectedIndices.length > 0) ? selectedIndices[0] : null;

            // Prepare the search criteria we'll use to query the data store
            var typedChar = String.fromCharCode(keyEventObj.getCharCode());
            var startIndex = (currentSelectedIndex == null) ? 0 : ++currentSelectedIndex;

            var matchIndex = this.store.find(displayFieldName, typedChar, startIndex, false);

            if( matchIndex >= 0 ) {
                this.select(matchIndex);
            } else if (matchIndex == -1 && startIndex > 0) {
                // If nothing matched but we didn't start the search at the beginning of the list
                // (because the user already had somethign selected), search again from beginning.
                matchIndex = this.store.find(displayFieldName, typedChar, 0, false);                                
                if( matchIndex >= 0 ) {
                    this.select(matchIndex);
                }
            }

            if( matchIndex >= 0 ) {
                var record = this.store.getAt(matchIndex);
                this.setValue(record.get(valueFieldName));
            }
        }
    }
}

Answer 3

你试过typeAhead = false吗？不太确定这是否接近你想要的。

var combo = new Ext.form.ComboBox({
    typeAhead: false,

    ...

});

Answer 4

var buf = []; 
buf.push('<option>aA1</option>');
buf.push('<option>aA2</option>');
buf.push('<option>bA3</option>');
buf.push('<option>cA4</option>');

var items = buf.join('');
new Ext.Component({
    renderTo: Ext.getBody(),
    autoEl: {
         tag:'select',
         cls:'x-font-select',
         html: items
    }
 });

Answer 5

只需使用Ext.merge功能

即可

来自文档：http://docs.sencha.com/extjs/4.2.1/#!/api/Ext-method-merge

如何让extjs组合框像普通的html选择框一样？

5 个答案: