LÖVE

Posted: **Mon Oct 15, 2018 11:32 am**

Hi all,

I'm trying to make a menu screen. I seem to be doing something wrong in the mousepressed function since it isn't calling the function when the screen is clicked. Can anybody help me figure out why? I also have some code that makes the buttons red if you hold the mouse over them but I haven't finished it so don't mind it.

Thanks,

Code: Select all

function menu_load()
  titlefont = love.graphics.newFont("Icons&Extras/Font/slkscr.ttf", 64)
  buttonfont = love.graphics.newFont("Icons&Extras/Font/slkscr.ttf", 48)
  menubuttons = {
    startButton = {text = "Start", x = 200, y = 300, call = startgame},
    exitButton = {text = "Exit", x = 200, y = 500, call = exitgame},
    optionsButton = {text = "Options", x = 200, y = 400, call = openoptions}
    } 
end

function menu_draw()
  love.graphics.setFont(titlefont)
  love.graphics.printf("KNIGHTLY", 200, 100, 400, "center")
  
  love.graphics.setFont(buttonfont)
  for i, v in pairs(menubuttons) do 
  love.graphics.printf(v.text, v.x, v.y, 400, "center")
  end
end

function menu_update(Somethinglikedt)
  
end

function menu_mousepressed(x, y, button)
  for i, v in pairs(menubuttons) do
    if x > v.x and x < v.x + 200 and y > v.y and y < v.y + 35 then
    v.call()
    end
  end
end

function menu_mousemoved(x, y)
   for i, v in pairs(menubuttons) do
    if x > v.x and x < v.x + 400 and y > v.y and y < v.y + 35 then
    buttonColour = love.graphics.setColor(255, 0, 0)
  else
    buttonColour = love.graphics.setColor(255, 255, 255)
    end
  end
end

function startgame()
  print("startinggame")
end

function exitgame()
  print("quiting")
end

function openoptions()
  print("fetchingoptions")
end

Posted: **Tue Oct 16, 2018 1:14 am**

Before I offer you a solution I would definately recommend you to read the documentation or try some tutorial

.

Anyway here is a working solution(rectangles are just for visualing the hitboxes):

Code: Select all

function love.load()
	menu_load()
end

function love.update(dt)
	local  	down = love.mouse.isDown(1)
	local 	mx = love.mouse.getX()	
	local	my = love.mouse.getY()
	menu_mousehandling(mx, my, down)

end

function love.draw()
	menu_draw()
end

function menu_load()
	menubuttons = {
	    startButton = 	{hover = false, text = "Start", 	x = 200, y = 300, call = startgame},
	    exitButton = 	{hover = false, text = "Exit", 		x = 200, y = 500, call = exitgame},
	    optionsButton = {hover = false, text = "Options", 	x = 200, y = 400, call = openoptions}
	}
	redColor = {255,0,0,255}
	whtColor = {255,255,255,255}
end

function menu_draw()
  love.graphics.printf("KNIGHTLY", 200, 100, 400, "center")
  for i, v in pairs(menubuttons) do
  	if v.hover == true then
  		love.graphics.setColor(redColor)
  	else
  		love.graphics.setColor(whtColor)
  	end
  	love.graphics.printf(v.text, v.x, v.y, 400, "center")
  	love.graphics.rectangle('line', v.x + 200 - 100, v.y - 20, 200, 40)
  	love.graphics.setColor(whtColor)
  end
end

function menu_update(Somethinglikedt)
  
end

function menu_mousehandling(mx, my, down)
  for i, v in pairs(menubuttons) do
    if mx > v.x + 200 - 100 and mx < v.x + 200 + 100 and my > v.y - 20 and my < v.y + 20 then
    	v.hover=true
    	if down == true then v.call() end
    else
    	v.hover=false
    end
  end
end

function startgame()
  print("startinggame")
end

function exitgame()
  print("quiting")
end

function openoptions()
  print("fetchingoptions")
end

Thats how it looked afterwards:

Hope that helped ya,
KowalewskajA

Posted: **Tue Oct 16, 2018 7:06 am**

Are you calling the menu_mousepressed function from main.lua?
Like:

Code: Select all

function love.mousepressed( x, y, button, istouch, presses )
    menu_mousepressed(x, y, button, istouch, presses)
end

Othewise how would it know it has to call it?

If so, are you sure it isn't calling it?
Maybe the coordinates are wrong.
Try to print something in the function, like:

Code: Select all

function menu_mousepressed(x, y, button)
 print("I entered the menu mousepressed function") 
 for i, v in pairs(menubuttons) do
    if x > v.x and x < v.x + 200 and y > v.y and y < v.y + 35 then
    v.call()
    end
  end
end

Posted: **Tue Oct 16, 2018 7:21 am**

Your positioning is off, draw a rectangle round the box in your draw function like this

Code: Select all

function menu_draw()
  --love.graphics.setFont(titlefont)
  love.graphics.printf("KNIGHTLY", 200, 100, 400, "center")
  
  --love.graphics.setFont(buttonfont)
  for i, v in pairs(menubuttons) do
    --A rectangle here will show you the bounds of your collision check.
    love.graphics.rectangle("line", v.x, v.y, 200, 35)
  love.graphics.printf(v.text, v.x, v.y, 400, "center")
  end
end
--This happened because here you check a box 200 wide and 35 high but above you centered your text in a box 400 wide.
function menu_mousepressed(x, y, button)
  for i, v in pairs(menubuttons) do
    if x > v.x and x < v.x + 200 and y > v.y and y < v.y + 35 then
    v.call()
    end
  end
end

Posted: **Tue Oct 16, 2018 1:31 pm**

xNick1 wrote: ↑Tue Oct 16, 2018 7:06 am Are you calling the menu_mousepressed function from main.lua?
Like:
Code: Select all
function love.mousepressed( x, y, button, istouch, presses )
    menu_mousepressed(x, y, button, istouch, presses)
end
Othewise how would it know it has to call it?

If so, are you sure it isn't calling it?
Maybe the coordinates are wrong.
Try to print something in the function, like:
Code: Select all
function menu_mousepressed(x, y, button)
 print("I entered the menu mousepressed function") 
 for i, v in pairs(menubuttons) do
    if x > v.x and x < v.x + 200 and y > v.y and y < v.y + 35 then
    v.call()
    end
  end
end

I had not actually done this, but putting this function in the main.lua - to my surprise - did not actually fix the issue. When I put a print statement in the function to see if a click was detected at all it doesn't print anything. In fact, it even doesn't print anything when I put the print function in love.mousepressed itself.

Posted: **Tue Oct 16, 2018 1:40 pm**

pedrosgali wrote: ↑Tue Oct 16, 2018 7:21 am Your positioning is off, draw a rectangle round the box in your draw function like this

Code: Select all

function menu_draw()
  --love.graphics.setFont(titlefont)
  love.graphics.printf("KNIGHTLY", 200, 100, 400, "center")
  
  --love.graphics.setFont(buttonfont)
  for i, v in pairs(menubuttons) do
    --A rectangle here will show you the bounds of your collision check.
    love.graphics.rectangle("line", v.x, v.y, 200, 35)
  love.graphics.printf(v.text, v.x, v.y, 400, "center")
  end
end
--This happened because here you check a box 200 wide and 35 high but above you centered your text in a box 400 wide.
function menu_mousepressed(x, y, button)
  for i, v in pairs(menubuttons) do
    if x > v.x and x < v.x + 200 and y > v.y and y < v.y + 35 then
    v.call()
    end
  end
end

But x is set at 200 and the line is wrapped at 400 so then the text is in a 200 pixel window isn't it? Or I am completely misunderstanding how the wrapping of printf works. Either way, changing it to 400 pixels still doesn't resolve the issue. Also telling me the function isn't being called somehow.

Posted: **Tue Oct 16, 2018 3:00 pm**

xpali2 wrote: ↑Tue Oct 16, 2018 1:31 pmIn fact, it even doesn't print anything when I put the print function in love.mousepressed itself.

Are you sure you're monitoring the console window instead of the game window? If you're under Windows, are you using lovec.exe?

Posted: **Tue Oct 16, 2018 5:46 pm**

pgimeno wrote: ↑Tue Oct 16, 2018 3:00 pm
xpali2 wrote: ↑Tue Oct 16, 2018 1:31 pmIn fact, it even doesn't print anything when I put the print function in love.mousepressed itself.
Are you sure you're monitoring the console window instead of the game window? If you're under Windows, are you using lovec.exe?

I'm using zerobrane studio and the console window that belong to that. It worked previously and I haven't changed anything, so there is no reason why it shouldn't print to that console now I reckon.

Posted: **Tue Oct 16, 2018 7:45 pm**

Well, it's hard to help any further without having something we can look into by ourselves. The code in the OP definitely can't help diagnosing why your love.mousepressed event isn't working.

Posted: **Wed Oct 17, 2018 9:13 am**

Did you even try drawing the rectangles to the screen?

If you had you would have immediately seen your problem.

LÖVE

Mousepressed not working?

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