私はExtJSコンボボックスを持っていますが、要件は、ユーザーが次のように最初の値からすべてのオプションを選択できる追加の値を持つことです。
Ext.onReady(function () {
// The data store containing the list of states
var states = Ext.create('Ext.data.Store', {
fields: ['abbreviation', 'name'],
data: [{
name: 'Select all',
abbreviation: 'ALL'
},
{
name: 'ALABAMA',
abbreviation: 'AL'
}, {
name: 'ALASKA',
abbreviation: 'AK'
}, {
name: 'AMERICAN SAMOA',
abbreviation: 'AS'
}, {
name: 'ARIZONA',
abbreviation: 'AZ'
}, {
name: 'ARKANSAS',
abbreviation: 'AR'
}, {
name: 'CALIFORNIA',
abbreviation: 'CA'
}, {
name: 'COLORADO',
abbreviation: 'CO'
}, {
name: 'CONNECTICUT',
abbreviation: 'CT'
}, {
name: 'DELAWARE',
abbreviation: 'DE'
}, {
name: 'DISTRICT OF COLUMBIA',
abbreviation: 'DC'
}, {
name: 'FEDERATED STATES OF MICRONESIA',
abbreviation: 'FM'
}, {
name: 'FLORIDA',
abbreviation: 'FL'
}, {
name: 'GEORGIA',
abbreviation: 'GA'
}, {
name: 'GUAM',
abbreviation: 'GU'
}, {
name: 'HAWAII',
abbreviation: 'HI'
}, {
name: 'IDAHO',
abbreviation: 'ID'
}, {
name: 'ILLINOIS',
abbreviation: 'IL'
}, {
name: 'INDIANA',
abbreviation: 'IN'
}, {
name: 'IOWA',
abbreviation: 'IA'
}, {
name: 'KANSAS',
abbreviation: 'KS'
}, {
name: 'KENTUCKY',
abbreviation: 'KY'
}, {
name: 'LOUISIANA',
abbreviation: 'LA'
}, {
name: 'MAINE',
abbreviation: 'ME'
}, {
name: 'MARSHALL ISLANDS',
abbreviation: 'MH'
}, {
name: 'MARYLAND',
abbreviation: 'MD'
}, {
name: 'MASSACHUSETTS',
abbreviation: 'MA'
}, {
name: 'MICHIGAN',
abbreviation: 'MI'
}, {
name: 'MINNESOTA',
abbreviation: 'MN'
}, {
name: 'MISSISSIPPI',
abbreviation: 'MS'
}, {
name: 'MISSOURI',
abbreviation: 'MO'
}, {
name: 'MONTANA',
abbreviation: 'MT'
}, {
name: 'NEBRASKA',
abbreviation: 'NE'
}, {
name: 'NEVADA',
abbreviation: 'NV'
}, {
name: 'NEW HAMPSHIRE',
abbreviation: 'NH'
}, {
name: 'NEW JERSEY',
abbreviation: 'NJ'
}, {
name: 'NEW MEXICO',
abbreviation: 'NM'
}, {
name: 'NEW YORK',
abbreviation: 'NY'
}, {
name: 'NORTH CAROLINA',
abbreviation: 'NC'
}, {
name: 'NORTH DAKOTA',
abbreviation: 'ND'
}, {
name: 'NORTHERN MARIANA ISLANDS',
abbreviation: 'MP'
}, {
name: 'OHIO',
abbreviation: 'OH'
}, {
name: 'OKLAHOMA',
abbreviation: 'OK'
}, {
name: 'OREGON',
abbreviation: 'OR'
}, {
name: 'PALAU',
abbreviation: 'PW'
}, {
name: 'PENNSYLVANIA',
abbreviation: 'PA'
}, {
name: 'PUERTO RICO',
abbreviation: 'PR'
}, {
name: 'RHODE ISLAND',
abbreviation: 'RI'
}, {
name: 'SOUTH CAROLINA',
abbreviation: 'SC'
}, {
name: 'SOUTH DAKOTA',
abbreviation: 'SD'
}, {
name: 'TENNESSEE',
abbreviation: 'TN'
}, {
name: 'TEXAS',
abbreviation: 'TX'
}, {
name: 'UTAH',
abbreviation: 'UT'
}, {
name: 'VERMONT',
abbreviation: 'VT'
}, {
name: 'VIRGIN ISLANDS',
abbreviation: 'VI'
}, {
name: 'VIRGINIA',
abbreviation: 'VA'
}, {
name: 'WASHINGTON',
abbreviation: 'WA'
}, {
name: 'WEST VIRGINIA',
abbreviation: 'WV'
}, {
name: 'WISCONSIN',
abbreviation: 'WI'
}, {
name: 'WYOMING',
abbreviation: 'WY'
}]
});
Ext.define('comboSelectedCount', {
alias: 'plugin.selectedCount',
init: function (combo) {
var fl = combo.getFieldLabel();
combo.on({
select: function (me, records) {
var len = records.length,
store = combo.getStore();
// toggle all selections
Ext.each(records, function (obj, i, recordsItself) {
if (records[i].data.abbreviation === 'ALL') {
len = store.getCount();
combo.select(store.getRange());
}
});
me.setFieldLabel(fl + ' (' + len + ' selected)');
},
beforedeselect: function (me, record, index) {
me.setFieldLabel(fl);
}
})
}
});
// Create the combo box, attached to the states data store
Ext.create('Ext.form.ComboBox', {
disabled: false,
plugins: ['selectedCount'],
fieldLabel: 'Choose State',
labelAlign: 'top',
store: states,
queryMode: 'local',
editable: false,
displayField: 'name',
valueField: 'abbreviation',
renderTo: Ext.getBody(),
multiSelect: true,
maxSelections: 3,
width: 400,
displayTpl: '<tpl for=".">' +
'{name}' +
'<tpl if="xindex < xcount">, </tpl>' +
'</tpl>',
listConfig: {
itemTpl: '{name} <div class="chkbox"></div>'
},
listeners: {
}
});
});
ユーザーが「すべて選択」のチェックを外すか、「すべて選択」以外の項目を選択したときに、すべての選択を解除できるようにしたい。
これを行う方法を本当に理解できませんか？
JSFiddleはこちら：http ：//jsfiddle.net/dFEsc/1/