Multiple selection dropdown

[Resike]

Anyone can provide me a template about this? The problems i run into mostly when you select a value to not to clear the already selected values.
I remember i saw some kinda template on the web back then, but i just can't find it now.

[Seerah]

Check here: http://forums.wowace.com/showthread.php?t=15763

[Resike]

Originally Posted by Seerah Check here: http://forums.wowace.com/showthread.php?t=15763

Coundn't find anything about it. My problem is about the UIDropDownMenu_GetSelected... and UIDropDownMenu_SetSelected..., only supports one checked item. I'm pretty sure there is a trick for it, since i don't want to rebuild the whole dropdown by myself.

[Seerah]

There is a way to do it. The Postal screenshot in that thread has checks next to almost every entry in the dropdown.

[Resike]

Originally Posted by Seerah There is a way to do it. The Postal screenshot in that thread has checks next to almost every entry in the dropdown.

I see, but i think Postal using AceGUI, and i already looked up in the Ace code, and got me nowhere.

[Resike]

What i really want to do is:

Have 1 variable a string like:

local lolvar = "0"

And a dropdown with lets say 3 buttons: 1, 2, 3.

And i want to change the lolvar's value based on the checked dropdown buttons.

Like if all is checked then the lolvar = "1/2/3".
If none is checked then the lolvar = "0".
If only the 1 and 3 is checked then lolvar = "1/3".

And so on.

The problems is i don't know how to get and set the selected values if multiple checks is also allowed.

[Phanx]

Originally Posted by Resike Coundn't find anything about it. My problem is about the UIDropDownMenu_GetSelected... and UIDropDownMenu_SetSelected..., only supports one checked item. I'm pretty sure there is a trick for it, since i don't want to rebuild the whole dropdown by myself.

Postal does not use UIDropDownMenu_GetSelected or UIDropDownMenu_SetSelected, but if you are using those functions in your addon, then you are already "rebuilding the whole dropdown".

Originally Posted by Resike I see, but i think Postal using AceGUI, and i already looked up in the Ace code, and got me nowhere.

The menu in Postal does not use AceGUI or any other libraries. In fact, the thread Seerah linked is a tutorial written by the author of Postal showing you how to use the UIDropDownMenu system the way Postal does -- without any libraries.

Originally Posted by Resike Like if all is checked then the lolvar = "1/2/3". If none is checked then the lolvar = "0". If only the 1 and 3 is checked then lolvar = "1/3".

You'd need to keep a table containing each menu option and its check state. When the user checks or unchecks one entry, update its value in the table to reflect its new state, and then loop over the table to update your "lolvar" variable.

However, concatenating values into a string seems like a really inefficient way to store multiple values. You should just store them in the table, and use the table values, instead of squishing them into a string.

[Resike]

Originally Posted by Phanx Postal does not use UIDropDownMenu_GetSelected or UIDropDownMenu_SetSelected, but if you are using those functions in your addon, then you are already "rebuilding the whole dropdown". The menu in Postal does not use AceGUI or any other libraries. In fact, the thread Seerah linked is a tutorial written by the author of Postal showing you how to use the UIDropDownMenu system the way Postal does -- without any libraries. You'd need to keep a table containing each menu option and its check state. When the user checks or unchecks one entry, update its value in the table to reflect its new state, and then loop over the table to update your "lolvar" variable. However, concatenating values into a string seems like a really inefficient way to store multiple values. You should just store them in the table, and use the table values, instead of squishing them into a string.

So i pretty much need to use the info.checked and write my own iterator functions, thats what i was meant by rebuilding it and wanted to skip.

I would like to work with tables too, but i cant, the lolvar is a savedvar too, and it's size based on the number of the player's avaliable stances.

[Phanx]

Originally Posted by Resike I would like to work with tables too, but i cant, the lolvar is a savedvar too, and it's size based on the number of the player's avaliable stances.

You can store a table in a saved variable, and it's a lot faster and cheaper to get the number of values in a table, vs. splitting up a string and counting the parts. Without seeing your code it's impossible to be more specific, but I can't imagine any scenario where constantly concatenating and splitting a string is in any way better than using a table, unless you're displaying the string to the user somewhere, in which case it is still more efficient to keep the actual data in a table, and only convert one way (table data -> string) instead of constantly going back and forth.

Originally Posted by Resike So i pretty much need to use the info.checked and write my own iterator functions, thats what i was meant by rebuilding it and wanted to skip.

Again, without seeing your actual code, all I can really tell you is that (a) it's possible and (b) it's not very hard. If you want any real help, you're going to have to show your code.

[Vlad]

Could use bit.band for this task, let me explain:

-- just for convencience
local optMap = {
  [1] = "Option 1",
  [2] = "Option 2",
  [4] = "Option 3",
  [8] = "Option 4",
}

-- the option value
local opt = 0

--[[
Opt starts at 0; when an option is checked/unchecked either
add or remove its value from opt; if you click "Option 3"
so it becomes checked you opt=opt+4 while if you uncheck
it you must opt=opt-4 and so forth.

You can use bit.band(opt, index) to figure out if a certain
bit is on or off, and the best part is that it supports storing
several field values in one integer - no need to create
more variables than you have to!

"bit.band(opt, 1) > 0" is true when "Option 1" is checked
"bit.band(opt, 2) > 0" is true when "Option 2" is checked
"bit.band(opt, 4) > 0" is true when "Option 3" is checked
"bit.band(opt, 8) > 0" is true when "Option 4" is checked
]]

-- print results
for index, name in pairs(optMap) do
  local checked = bit.band(opt, index) > 0
  print(name .. " = " .. (checked and "TRUE" or "FALSE"))
end

[Phanx]

Yeah, but I wasn't going to go there, as the OP seems to be learning enough new things at the same time already.

[Resike]

Originally Posted by Phanx You can store a table in a saved variable, and it's a lot faster and cheaper to get the number of values in a table, vs. splitting up a string and counting the parts. Without seeing your code it's impossible to be more specific, but I can't imagine any scenario where constantly concatenating and splitting a string is in any way better than using a table, unless you're displaying the string to the user somewhere, in which case it is still more efficient to keep the actual data in a table, and only convert one way (table data -> string) instead of constantly going back and forth.

The var is already used for import export options, and already have an ADDON_MESSAGE communication built around it, and if i create another table in the table i have to rewrite the whole package to support this new table too, and this new type of communication with import export is not gonna work with the older addon versions then.

[Seerah]

You realize that you can have more than one saved variable, right?