disableable_disabled_custom_value.xml

<canvas padded size="150x200">
	<content>
		<widget pos="10,10" size="120x37" type="*widget.Entry">
			<rectangle fillColor="rgba(102,102,102,255)" pos="0,2" size="120x33"/>
			<rectangle fillColor="disabled" pos="0,35" size="120x2"/>
			<widget pos="0,2" size="120x33" type="*widget.entryContent">
				<widget size="120x33" type="*widget.textProvider">
					<text color="disabled" pos="8,6" size="112x21">Hello</text>
				</widget>
			</widget>
		</widget>
	</content>
</canvas>