设置 combobox picker 选择器高度. ext.net

<ext:ComboBox ... MatchFieldWidth="false">
    <Listeners>
        <Expand Handler="var picker = this.getPicker(),
                            width = this.getWidth(),
                            pickerWidth = picker.getWidth();

                        if (pickerWidth > width) {
                            picker.setWidth(width);
                        }" />
    </Listeners>
</ext:ComboBox>