ComboBox.js
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/**
* Layout class for {@link Ext.form.field.ComboBox} fields. Handles sizing the input field.
* @private
*/
Ext.define('Ext.layout.component.field.ComboBox', {
extend: 'Ext.layout.component.field.Trigger',
alias: 'layout.combobox',
requires: ['Ext.util.TextMetrics'],
type: 'combobox',
startingWidth: null,
getTextWidth: function () {
var me = this,
owner = me.owner,
store = owner.store,
field = owner.displayField,
storeLn = store.data.length,
value = '',
i = 0, n = 0, ln, item, width;
for (; i < storeLn; i++) {
item = store.getAt(i).data[field];
ln = item.length;
// compare the current item's length with the current longest length and store the value
if (ln > n) {
n = ln;
value = item;
}
}
width = Math.max(me.callParent(arguments), owner.inputEl.getTextWidth(value + owner.growAppend));
// it's important to know the starting width else the inputEl could be resized smaller than the boundlist
// NOTE that when removing items from the store that the startingWidth needs to be recalculated
if (!me.startingWidth || owner.removingRecords) {
me.startingWidth = width;
// also, if the width is less than growMin reset the default boundlist width
// or it will appear wider than the component if the trigger is clicked
if (width < owner.growMin) {
owner.defaultListConfig.minWidth = owner.growMin;
}
owner.removingRecords = false;
}
// only resize if the new width is greater than the starting width
return (width < me.startingWidth) ? me.startingWidth : width;
}
});