[Ayantir]

Because doing like this need that you write the lua code in your function which will be executed when addon will be loaded. (with event_add_on_loaded).

If you write

mycontrol:SetText(GetUnitName("player"))

and your LUA file is before your XML file in the metdata (.txt file). You'll get the error you quoted.


Another way of doing this is :

<GuiXml>
    <Controls>
        <TopLevelControl name="Test1" mouseEnabled="true" movable="true">
            <OnInitialized>
                doStuff(self)
            </OnInitialized>
            <Dimensions x="400" y="400" />
            <Anchor point="CENTER" />
            <Controls>
                <Backdrop name="myControlBG" inherits="ZO_ThinBackdrop" />
                <Label name="myControl" font="ZoFontWindowTitle" color="CFDCBD" wrapMode="ELLIPSIS">
                    <AnchorFill />
                </Label>
            </Controls>
        </TopLevelControl>
    </Controls>
</GuiXml>

+ in LUA

function doStuff(control)
    mycontrol:SetText(GetUnitName("player")) -- method 1
end

You can also use $(parent), like this :

<GuiXml>
    <Controls>
        <TopLevelControl name="Test1" mouseEnabled="true" movable="true">
            <OnInitialized>
                doStuff(self)
            </OnInitialized>
            <Dimensions x="400" y="400" />
            <Anchor point="CENTER" />
            <Controls>
                <Backdrop name="myControlBG" inherits="ZO_ThinBackdrop" />
                <Label name="$(parent)CharName" font="ZoFontWindowTitle" color="CFDCBD" wrapMode="ELLIPSIS">
                    <AnchorFill />
                </Label>
            </Controls>
        </TopLevelControl>
    </Controls>
</GuiXml>

+ in LUA

function doStuff(control)
    control:GetNamedChild("CharName"):SetText(GetUnitName("player")) -- control is the self object which come from the XML
end