javascript - ComboBox 无法在 ExtJS 的 EditorGridPanel 中工作

Question

我是 ExtJS 新手，需要将 ComboBox 放入 EditorGridPanel 中。

到目前为止，我的代码没有在 EditorGridPanel 中创建组合框，并且 EditorGridPanel 也没有显示。

这是代码，感谢您的帮助。夺旗

   /*==== INVOICE DATA START =======================================================*/

/* create the ComboBox editor */
var idCombo = new Ext.form.ComboBox({
    id: 'id',
    valueField: 'id',
    displayField:'id',
    store: '',  //what do I store here?? 
    triggerAction: 'all'
});

var idRenderer = function(value,metaData,record){
   // try record.data.teacher here
   return "displayValue"


var iLineItemCM = new Ext.grid.ColumnModel([

    {
        id: 'i_line_item_id',
        header: 'Line Item ID',
        dataIndex: 'i_line_item_id',
        width: 80,
        editor: this.idCombo(),
        renderer:idRenderer

    }

,{
        id:'i_line_item_name',
        header: "Line Item Name",
        dataIndex: 'i_line_item_name',
        width: 315,
        resizable: true,
        align: 'center',
        editor: new Ext.form.TextArea({
            allowBlank: false
        })
    }
    ,{
        header: "Amount",
        dataIndex: 'i_line_item_amt',
        width: 80,
        align: 'right',
        renderer: 'usMoney',
        editor: new Ext.form.NumberField({
            allowBlank: false,
            allowNegative: false,
            maxValue: 100000
        })
    }
    ]);

var iLineItemRec =
new Ext.data.Record.create([
    {
    name: 'i_line_item_id'    ,
    mapping: 'i_line_item_id'  ,
    type: 'string'
}
,{
    name: 'i_line_item_name'    ,
    mapping: 'i_line_item_name'  ,
    type: 'string'
}
,{
    name: 'i_line_item_amt'     ,
    mapping: 'i_line_item_amt'   ,
    type: 'string'
}
]);

var iLineItemStore = new Ext.data.Store({
    url: '',
    reader: new Ext.data.JsonReader({
        root: 'rows'
    },
    iLineItemRec
    )
});

var iLineItemGrid = new Ext.grid.EditorGridPanel({
    id: 'iLineItemStore',
    store: iLineItemStore,
    cm: iLineItemCM,
    cls: 'iLineItemGrid',
    width: 'auto',
    height: 'auto',
    frame: true,
    //title:'Edit Plants?',
    //plugins:checkColumn,
    clicksToEdit:1,
    viewConfig: {
        //forceFit: true
        autoFit:true
    },
    tbar: [{
        text: 'Add',
        tooltip:'Add the line item',
        handler : function(){
            var r = new iLineItemRec({
                i_line_item_name: '',
                i_line_item_amt: ''
            });
            iLineItemGrid.stopEditing();
            iLineItemStore.insert(0, r);
            iLineItemGrid.startEditing(0, 0);
        }
    },
    {
        text: 'Delete',
        tooltip:'Remove the selected line item',
        handler: function(){
            iLineItemGrid.stopEditing();
            var r = iLineItemGrid.getSelectionModel().getSelectedCell();
            iLineItemStore.removeAt(r[1]);
        }

    }

    ]
});
/////////////////// CODE ENDS

Answer 1

您需要创建一个数据存储并将其绑定(bind)到您的组合框。然后在组合配置中，您可以告诉它要显示商店中的哪个字段以及要显示哪个字段的值。以下是 ExtJS 4 API 文档中的示例:

// The data store containing the list of states
var states = Ext.create('Ext.data.Store', {
    fields: ['abbr', 'name'],  // fields that your data consists of
    data : [
        {"abbr":"AL", "name":"Alabama"},
        {"abbr":"AK", "name":"Alaska"},
        {"abbr":"AZ", "name":"Arizona"}
        //...
    ]
});

// Create the combo box, attached to the states data store
var combo = Ext.create('Ext.form.ComboBox', {
    fieldLabel: 'Choose State',
    store: states,  // here you use the store
    queryMode: 'local',
    displayField: 'name',  // you tell your combobox which field to display from the store
    valueField: 'abbr',  // you tell your combobox which field to use for value from the store
    renderTo: Ext.getBody()
});

如果您使用combo.getValue()，并且例如在组合框中选择“阿拉斯加”，它将返回“AK”。如果您愿意，您还可以使用与 displayField 和 valueField 相同的字段。