Dropdown menu problems

[davedontmind]

I'm having trouble getting dropdown menus working correctly.

I have things *almost* working, but whenever I select a choice from the menu, all items from the one I selected up to the last one end up with a check mark beside them. What am I doing wrong?

Here is a very short test addon in its entirety that demonstrates the problem, in case anyone wants to try it.
First the .lua file:

function Test_DropDownInitialize()
    local entry = { func = Test_DropDownOnClick; }

    entry.text = "One";   entry.value = 101; UIDropDownMenu_AddButton(entry)
    entry.text = "Two";   entry.value = 102; UIDropDownMenu_AddButton(entry)
    entry.text = "Three"; entry.value = 103; UIDropDownMenu_AddButton(entry)
    entry.text = "Four";  entry.value = 104; UIDropDownMenu_AddButton(entry)
    
end

function Test_DropDownOnClick()
    UIDropDownMenu_SetSelectedID( Test_dropdown, this:GetID() );
end

The XML file:

<Ui xmlns="http://www.blizzard.com/wow/ui/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.blizzard.com/wow/ui/ C:\Projects\WoW\Bin\Interface\FrameXML\UI.xsd">
  <Script file="Test.lua"/>
  <Frame name="TestMainFrame" frameStrata="HIGH" parent="UIParent" hidden="false" toplevel="true" enableMouse="true" movable="true"> 
	<Scripts>
	    <OnMouseDown>
		    this:StartMoving();
	    </OnMouseDown>
	    <OnMouseUp>
		    this:StopMovingOrSizing();
	    </OnMouseUp>
	</Scripts>

	<Size>
	    <AbsDimension x="200" y="100"/>
	</Size>

	<Anchors>
		<Anchor point="CENTER"/>
	</Anchors>

	<Backdrop name="$parentBackdrop" bgFile="Interface\TutorialFrame\TutorialFrameBackground" edgeFile="Interface\DialogFrame\UI-DialogBox-Border" tile="true">
	    <EdgeSize>
		<AbsValue val="16"/>
	    </EdgeSize>
	    <TileSize>
		<AbsValue val="32"/>
	    </TileSize>
	    <BackgroundInsets>
		<AbsInset left="5" right="5" top="5" bottom="5"/>
	    </BackgroundInsets>
	</Backdrop>

	<Layers>
	    <Layer level="ARTWORK">
		<Texture file="Interface\DialogFrame\UI-DialogBox-Header">
		    <Size><AbsDimension x="256" y="64"/></Size>
		    <Anchors>
			<Anchor point="TOP">
			<Offset><AbsDimension x="0" y="12"/></Offset>
			</Anchor>
		    </Anchors>
		</Texture>
	    </Layer>
	</Layers>

	<Frames>
	    <Button name="Test_dropdown" inherits="UIDropDownMenuTemplate">
		<Size>
		    <AbsDimension x="48" y="24"/>
		</Size>
		<Anchors>
		    <Anchor point="TOPLEFT">
			<Offset><AbsDimension x="30" y="-40"/></Offset>
		    </Anchor>
		</Anchors>
		<Scripts>
		    <OnShow>
			UIDropDownMenu_Initialize( this, Test_DropDownInitialize );
		    </OnShow>
		</Scripts>
	    </Button>
	</Frames>

    </Frame>
</Ui>

And the TOC file:

## Title: Test
## Interface: 1800
## Version: 0.01
## Notes: Test
Test.xml

[DMXGuru]

function Test_DropDownInitialize() local entry = { func = Test_DropDownOnClick; } entry.text = "One"; entry.value = 101; UIDropDownMenu_AddButton(entry) entry.text = "Two"; entry.value = 102; UIDropDownMenu_AddButton(entry) entry.text = "Three"; entry.value = 103; UIDropDownMenu_AddButton(entry) entry.text = "Four"; entry.value = 104; UIDropDownMenu_AddButton(entry) end

You have a problem in your 'code'... there's a simple solution fortunately.

What's happening is there's a variable in the 'entry' array there that isn't being reset to nil to deselect it. Modify the lines so they look something like:

entry.text = "One"; entry.value = 101;
if (UIDropDownMenu_GetSelectedValue(Test_dropdown) == entry.value)
then entry.checked = true
else entry.checked = nil
end
UIDropDownMenu_AddButton(entry)

See if this helps.