a means of checking if a frame exists

Grimsin · 01-30-12, 09:56 PM

is there a means to check if a frame exists not just if it is shown or visible?

if you put an or inside of a setpoint say...
frame:SetPoint("LEFT", otherframe, "LEFT", or "LEFT", someotherframe, "LEFT") would it skip passed the first if it could not find that frame?

**Seerah** · 01-30-12, 10:06 PM

frame:SetPoint("LEFT", otherframe or someotherframe, "LEFT")

Grimsin · 01-30-12, 10:12 PM

Does that work for doing SetParent(something or somethingelse) ? as far as i can tell it does not

**Seerah** · 01-30-12, 10:42 PM

If, for some reason, it's not working, then do this:

local frame = something or somethingelse
SetParent(frame)

Waky · 01-31-12, 11:29 AM

I'm pretty sure you can do something along the lines of:

Code:

if frameName then
-- Code to be executed if it exists
end

If I'm not mistaken

If that does nothing you could just to the nil check

Code:

if (frameName~=nil) then
-- Code to be executed if it exists
end

Grimsin · 01-31-12, 11:31 AM

Originally Posted by Waky

I'm pretty sure you can do something along the lines of:

Code:

if frameName then
-- Code to be executed if it exists
end

If I'm not mistaken

If that does nothing you could just to the nil check

Code:

if (frameName~=nil) then
-- Code to be executed if it exists
end

The first method i know does not work... that only works for addon names. You could do a check to see if an addon is loaded via if name then but does not work for frames that do not exist. Ill try the if framename == nil then do such and such or vice verse ~=

Last night i already went with a method not listed here at all... since what im trying to do is run my UI with files missing and i want to have one file in the UI check to see if frames from the other file are available and run them if they are or dont if they are not. What i ended up doing is just having the file create a variable when it loads and have the other file check for the variable. Most likely not an efficient method and if i can get either of the above to work im going to do that.

Grimsin · 01-31-12, 01:45 PM

Originally Posted by Seerah

If, for some reason, it's not working, then do this:

local frame = something or somethingelse
SetParent(frame)

Neither of the or'ing methods work it always trys to hook to the first frame passed and when it finds its not a frame it errors.

doing a frame =~ nil did work

Waky · 01-31-12, 02:28 PM

Originally Posted by Grimsin

Neither of the or'ing methods work it always trys to hook to the first frame passed and when it finds its not a frame it errors.

doing a frame =~ nil did work

Did you put ~= or =~?

**Seerah** · 01-31-12, 05:24 PM

Originally Posted by Grimsin

Neither of the or'ing methods work it always trys to hook to the first frame passed and when it finds its not a frame it errors.

doing a frame =~ nil did work

Then you asked the wrong question. You asked if a frame had been created yet. If a frame has not been created, then it is nil - assuming that you used a unique name or unique global variable for it. If it is nil, then my line will pass through the or. If, as you say, it throws an error saying that it's not a table, then it's not nil. It's equal to something else. Meaning that you are using the same variable name for multiple things.