How can I populate a Listbox in LUA?

[Trentin]

I'm trying to populate a listbox in LUA but I'm stuck on how I should create the ListboxItem's so I can insert them.

Here's what little I have so far:

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local pScoreList = tolua.cast(gWindowMgr:getWindow("lbScores"), "CEGUI::Listbox");
local listItem = gWindowMgr:createWindow("WindowsLook/ListboxItem","item1");

pScoreList:addItem(listItem);

The second line does not work at all, there's no factory for that type. Do I need one? Or am I way off?

[lindquist]

Listbox items are not widgets and therefore you dont use the WindowManager to create the items.

Use something like this:

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local function createItem(list, txt)
    local item = CEGUI.createListboxTextItem(txt)
    item:setTextColours(CEGUI.colour(0,0,0,1))
    item:setSelectionBrushImage("WindowsLook", "Background");
    item:setSelectionColours(CEGUI.colour(0.2,0.2,1,1))
    list:addItem(item)
end

local pScoreList = tolua.cast(gWindowMgr:getWindow("lbScores"), "CEGUI::Listbox");
createItem(pScoreList, "Item1")
createItem(pScoreList, "Item2")
createItem(pScoreList, "Item3")

[Trentin]

Thanks! I'm able to create and insert the list items now

Unfortunately these lines are giving me problems:

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item:setTextColours(CEGUI.colour(0,0,0,1))
item:setSelectionColours(CEGUI.colour(0.2,0.2,1,1))

The error for those lines is:

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error in function 'new'.
argument #1 is 'class CEGUI::colour'; 'CEGUI::MCLGridRef' expected.

Looks like it's just not finding the right overloaded function...


Update: And here's the solution

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-- create temp colour objects
local textColour = CEGUI.colour:new(0,0,0,1);
local selColour = CEGUI.colour:new(0.2,0.2,1,1);

item:setTextColours(textColour);
item:setSelectionBrushImage("WindowsLook", "Background");
item:setSelectionColours(selColour);

[lindquist]

unless you're freeing 'textColour' and 'selColour' manually you're making memory leaks.

Use 'new_local' to avoid that

[Trentin]

Thanks again! I would have never noticed that.