[lucro]

Originally Posted by SinusPi DrawLine isn't exactly anything revolutionary, sadly. It's just a shortcut to rotating and resizing texture A on top of texture B so that it resembles a line. It's actually Iriel's code, congratulations on getting featured DrawLine(texture, canvasFrame, startX, startY, endX, endY, lineWidth, lineFactor, relPoint)

There's a new line widget that may be what you're looking for. It can be animated to scale along the line. It's used in the artifact UI and the new flight map.

	<Frame name="FlightMap_HighlightFlightLineTemplate" virtual="true">
		<Layers>
			<Layer level="BACKGROUND" textureSubLevel="-1">
				<Line parentKey="Fill" file="Interface/TaxiFrame/UI-Taxi-Line" thickness="28" alpha="0" alphaMode="ADD" />
			</Layer>
		</Layers>
		<Animations>
			<AnimationGroup parentKey="RevealAnim" setToFinalAlpha="true">
				<Alpha parentKey="Alpha" childKey="Fill" duration=".15" fromAlpha="0" toAlpha="1" order="1"/>
				<LineScale parentKey="Scale" childKey="Fill" duration=".15" order="1" fromScaleX="0" fromScaleY="1" toScaleX="1" toScaleY="1">
					<Origin point="LEFT">
						<Offset x="1" y="0"/>
					</Origin>
				</LineScale>
			</AnimationGroup>
			<AnimationGroup parentKey="FadeAnim" setToFinalAlpha="true">
				<Alpha parentKey="Alpha" childKey="Fill" duration=".1" fromAlpha="1" toAlpha="0" order="1"/>
			</AnimationGroup>
		</Animations>
	</Frame>