Declare a key press combination for love.keyboard.isDown?

[Prof_Ants]

I can't seem to find it detailed in the wiki, but am I able to declare a love.keyboard.isDown with multiple keys?

I tried this (to no avail):

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if love.keyboard.isDown("lctrl" + "d") then
            speed = 100
       end

[SimonLarsen]

I think the wiki makes it pretty clear that you can give it multiple comma separated keys:

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Synopsis
   anyDown = love.keyboard.isDown( key1, key2, key3, ... )

Arguments
   * KeyConstant keyN
         A key to check.
 
Returns
    * boolean anyDown
          True if any supplied key is down, false if not.

[Prof_Ants]

What I am aiming to do is declare a key press combination. Will the comma separate statement produce this affect?

[IMP1]

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if love.keyboard.isDown("lctrl") and love.keyboard.isDown("d") then
    -- speed = 100 or whatever
end

[Prof_Ants]

Cheers mate!

[Robin]

Why your initial idea doesn't work is because of this:

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if love.keyboard.isDown("lctrl" + "d") then

Let's look at that argument:

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"lctrl" + "d"

That is the same as writing

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"lctrld"

Since there is no key named lctrld, it can never be down, and the call always returns false.

[tentus]

Why your initial idea doesn't work is because of this:

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if love.keyboard.isDown("lctrl" + "d") then

Let's look at that argument:

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"lctrl" + "d"

That is the same as writing

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"lctrld"

Since there is no key named lctrld, it can never be down, and the call always returns false.

(Robin, we're not using Javascript right now!)

Actually, arithmetic on strings isn't supported in Lua. To concatenate strings ("lctrl" + "d" = "lctrld") you need to use the .. operator ("lctrl" .. "d" = "lctrld"). The above fails because you can't add words together.

[Robin]

Shit, you're right.

Forget what I said.

[T-Bone]

Another thing that might be good to keep in mind:

Often when you have key combinations in many applications, you typically hold one key down and then click the other one (like Ctrl + C). A good way to implement this is

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function love.keypressed(k)
    if k == "c" and love.keyboard.isDown("ctrl") then
        --stuff
    end
end

[tentus]

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if k == "c" and love.keyboard.isDown("ctrl") then

Wow, somehow it had never occurred to me to do it that way- good tip!