extjs 窗口项样式

我正在为一个应用程序开发一个extJs前端。该页面有一个包含 3 个项目的 ext.window。其中包括图表、组合框和文本字段。我已经成功地在窗口中放置了两个项目，即图表和组合，但由于某种原因，图表占用了ext.window的所有宽度和高度。因此，组合框隐藏在图表后面。如何设置窗口的不同项目的样式？

Ext.onReady(function () {
    Ext.tip.QuickTipManager.init();
    Ext.define('State', {
        extend: 'Ext.data.Model',
        fields: [
            {type: 'string', name: 'abbr'},
            {type: 'string', name: 'name'},
            {type: 'string', name: 'slogan'}
        ]
    });
    // The data for all states
    var states = [
        {"abbr":"AL","name":"Alabama","slogan":"The Heart of Dixie"},
        {"abbr":"AK","name":"Alaska","slogan":"The Land of the Midnight Sun"},
        {"abbr":"AZ","name":"Arizona","slogan":"The Grand Canyon State"},
        {"abbr":"AR","name":"Arkansas","slogan":"The Natural State"},
        {"abbr":"CA","name":"California","slogan":"The Golden State"},
        {"abbr":"CO","name":"Colorado","slogan":"The Mountain State"},
        {"abbr":"CT","name":"Connecticut","slogan":"The Constitution State"},
        {"abbr":"DE","name":"Delaware","slogan":"The First State"},
        {"abbr":"DC","name":"District of Columbia","slogan":"The Nation's Capital"},
        {"abbr":"FL","name":"Florida","slogan":"The Sunshine State"},
        {"abbr":"GA","name":"Georgia","slogan":"The Peach State"},
        {"abbr":"HI","name":"Hawaii","slogan":"The Aloha State"},
        {"abbr":"ID","name":"Idaho","slogan":"Famous Potatoes"},
        {"abbr":"IL","name":"Illinois","slogan":"The Prairie State"},
        {"abbr":"IN","name":"Indiana","slogan":"The Hospitality State"},
        {"abbr":"IA","name":"Iowa","slogan":"The Corn State"},
        {"abbr":"KS","name":"Kansas","slogan":"The Sunflower State"},
        {"abbr":"KY","name":"Kentucky","slogan":"The Bluegrass State"},
        {"abbr":"LA","name":"Louisiana","slogan":"The Bayou State"},
        {"abbr":"ME","name":"Maine","slogan":"The Pine Tree State"},
        {"abbr":"MD","name":"Maryland","slogan":"Chesapeake State"},
        {"abbr":"MA","name":"Massachusetts","slogan":"The Spirit of America"},
        {"abbr":"MI","name":"Michigan","slogan":"Great Lakes State"},
        {"abbr":"MN","name":"Minnesota","slogan":"North Star State"},
        {"abbr":"MS","name":"Mississippi","slogan":"Magnolia State"},
        {"abbr":"MO","name":"Missouri","slogan":"Show Me State"},
        {"abbr":"MT","name":"Montana","slogan":"Big Sky Country"},
        {"abbr":"NE","name":"Nebraska","slogan":"Beef State"},
        {"abbr":"NV","name":"Nevada","slogan":"Silver State"},
        {"abbr":"NH","name":"New Hampshire","slogan":"Granite State"},
        {"abbr":"NJ","name":"New Jersey","slogan":"Garden State"},
        {"abbr":"NM","name":"New Mexico","slogan":"Land of Enchantment"},
        {"abbr":"NY","name":"New York","slogan":"Empire State"},
        {"abbr":"NC","name":"North Carolina","slogan":"First in Freedom"},
        {"abbr":"ND","name":"North Dakota","slogan":"Peace Garden State"},
        {"abbr":"OH","name":"Ohio","slogan":"The Heart of it All"},
        {"abbr":"OK","name":"Oklahoma","slogan":"Oklahoma is OK"},
        {"abbr":"OR","name":"Oregon","slogan":"Pacific Wonderland"},
        {"abbr":"PA","name":"Pennsylvania","slogan":"Keystone State"},
        {"abbr":"RI","name":"Rhode Island","slogan":"Ocean State"},
        {"abbr":"SC","name":"South Carolina","slogan":"Nothing Could be Finer"},
        {"abbr":"SD","name":"South Dakota","slogan":"Great Faces, Great Places"},
        {"abbr":"TN","name":"Tennessee","slogan":"Volunteer State"},
        {"abbr":"TX","name":"Texas","slogan":"Lone Star State"},
        {"abbr":"UT","name":"Utah","slogan":"Salt Lake State"},
        {"abbr":"VT","name":"Vermont","slogan":"Green Mountain State"},
        {"abbr":"VA","name":"Virginia","slogan":"Mother of States"},
        {"abbr":"WA","name":"Washington","slogan":"Green Tree State"},
        {"abbr":"WV","name":"West Virginia","slogan":"Mountain State"},
        {"abbr":"WI","name":"Wisconsin","slogan":"America's Dairyland"},
        {"abbr":"WY","name":"Wyoming","slogan":"Like No Place on Earth"}
    ];
    // The data store holding the states; shared by each of the ComboBox examples below
    var store = Ext.create('Ext.data.Store', {
        model: 'State',
        data: states
    });
    /*
    var simpleCombo = Ext.create('Ext.form.field.ComboBox', {
        fieldLabel: 'Select a single state',
        renderTo: 'myid',
        displayField: 'name',
        width: 320,
        labelWidth: 130,
        store: store,
        queryMode: 'local',
        typeAhead: true
    });
    */
    var win = Ext.create('Ext.Window', {
        width: 800,
        height: 500,
        minHeight: 400,
        minWidth: 550,
        hidden: false,
        maximizable: true,
        title: 'Column Chart',
        renderTo: Ext.getBody(),
        layout: 'fit',
        /*
        tbar: [{
            text: 'Reload Data',
            handler: function() {
                store1.loadData(generateData());
            }
        }],
        */
        items: [
            {
                id: 'chartCmp',
                xtype: 'chart',
                width: 200,
                height: 200,
                animate: true,
                shadow: true,
                store: store1,
                axes: [{
                    type: 'Numeric',
                    position: 'left',
                    fields: ['data1'],
                    label: {
                        renderer: Ext.util.Format.numberRenderer('0,0')
                    },
                    title: 'Number of Hits',
                    grid: true,
                    minimum: 0
                }, {
                    type: 'Category',
                    position: 'bottom',
                    fields: ['name'],
                    title: 'Month of the Year'
                }],
                series: [{
                    type: 'column',
                    axis: 'left',
                    highlight: true,
                    tips: {
                        trackMouse: true,
                        width: 140,
                        height: 28,
                        renderer: function(storeItem, item) {
                            this.setTitle(storeItem.get('name') + ': ' + storeItem.get('data1') + ' $');
                        }
                    },
                    label: {
                        display: 'insideEnd',
                        'text-anchor': 'middle',
                        field: 'data1',
                        renderer: Ext.util.Format.numberRenderer('0'),
                        orientation: 'vertical',
                        color: '#333'
                    },
                    xField: 'name',
                    yField: 'data1'
                }]
            }, {
                // Simple ComboBox using the data store
                xtype: 'combo',
                fieldLabel: 'Select a single state',
                displayField: 'name',
                width: 320,
                labelWidth: 130,
                store: store,
                autoselect: true,
                queryMode: 'local',
                typeAhead: true
            }
        ]
    });
});