LÖVE

Posted: **Sun Apr 29, 2012 2:54 pm**

So, I'm making a small little lib to make it easier to make graphics. I'm giving each button a function to run, if they are clicked.

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function love.mousepressed(x, y, button)
	for k, obj in pairs(Objects) do
		if obj.objtype == "Button" and x > obj.xpos and x < obj.xpos + obj.width and y > obj.ypos and y < obj.ypos + obj.height and button == 1 then
			obj[click]()
		end
	end
end

It registers when the object is clicked fine, but it won't run the function stored in the click variable.

The function is added like so.

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function Lib.addFunc(objname, functype, func)
	Objects[objname][functype] = func
end

Example of calling it.

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Lib.addFunc("MyButton", "click", function()
Lib.edit("MyLabel", "words", "BUTTON WORKED")
end)

The above function adds a function that changes the text of the "MyLabel" object when "MyButton" is clicked (because when it's click, it should run it's clicked function).

So, when the button is clicked, it should run it's click function stored in the click variable, but it doesn't change the text when clicked, and doesn't run the function. If anyone understood, can they help?

By the way, if anyone needs so the the createButton function, here.

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Lib = {}
Objects = {}

function Lib.createButton(objname, x, y, h, w, stat, r, g, b)
	Objects[objname] = {objtype = "Button", xpos = x, ypos = y, height = h, width = w, status = stat, red = r, green = g, blue = b, click = nil} --click is set to nil because it's added later with the Lib.addFunc function.
end

Posted: **Sun Apr 29, 2012 3:05 pm**

There are several problems.

The first one is that the "button" paramter in love.mousepressed is never a "1". It's always one of the MouseConstants: "l", "m", "r", "wd", "wu", "x1" or "x2".

The second problem that you will have is that the click variable is nil, so this code will fail:

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obj[click]()

Instead, try this:

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obj:click()

There is also a bit of an issue with code cleanup. I'd move the "is this point inside the object" function to your objects. This way, the mousepressed function can look like this:

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function love.mousepressed(x, y, button)
  if button ~= "l" then return end
  for _,obj in pairs(Objects) do
    if obj:contains(x,y) then
      obj:click()
    end
  end
end

And then implement "contains" on all the buttons, etc that you have (probably using metatables and __index, so you don't have to store the same function again and again in all objects).

Posted: **Sun Apr 29, 2012 3:43 pm**

Thanks! It worked.

Posted: **Thu May 03, 2012 10:19 am**

I ever face the same problem and i can't slove it .At last,i change a my computer ,all is ok then.

LÖVE

Function not running?

Function not running?

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Re: Function not running?

Re: Function not running?