Slight Menu Problem

[EminentJonFrost]

its easy to fix, i'm sure.

while true do
	screen:blit(0, 0, mmenu)
	
	pad = Controls.read()

	screen:print(180, 130, ">Start Game", red)
	screen:print(180, 140, "Credit", white)
	screen.flip()

--This it to give the user the ability to choose options, but theres an error

	if pad:down() then
		screen:clear()
		screen:blit(0, 0, mmenu)
		screen:print(180, 130, "Start Game", white)
		screen:print(180, 140, ">Credit", red)
		screen.flip()

	if pad:up() then
		screen:clear()
		screen:blit(0, 0, mmenu)
		screen:print(180, 130, ">Start Game", red)
		screen:print(180, 140, "Credit", white)
		screen.flip()
end
end


screen.waitVblankStart()
end

with this code, the main page does what i want mostly. but i dont know how to keep the selected option..well selected. lol :icon_razz

[MasterQ]

the code is correct, but the way you have it oriented will only have it printed to the screen if you hold up or down. make the up/down buttons add or subtract from a variable. then, in your main loop, use an if/then statement to check the variable, and act accordingly.

EXAMPLE

while true do
	screen:blit(0, 0, mmenu)
	
	pad = Controls.read()

	screen:print(180, 130, ">Start Game", red)
	screen:print(180, 140, "Credit", white)
	screen.flip()

--This it to give the user the ability to choose options, but theres an error

	if pad:down() then
		if menuitem < 1 then
                        menuitem = menuitem + 1
                end
        end

	if pad:up() then
                if menuitem > 0 then
                        menuitem = menuitem - 1
                end
        end

screen:clear()
screen:blit(0, 0, mmenu)
if menuitem == 0 then
        screen:print(180, 130, ">Start Game", red)
        screen:print(180, 140, "Credit", white)
elseif menuitem == 1 then
        screen:print(180, 130, "Start Game", white)
        screen:print(180, 140, ">Credit", red)
end
screen.flip()
screen.waitVblankStart()
end

[EminentJonFrost]

oh ok. thats about where i am right now in learning lua.
good time to get a crash course.

[MasterQ]

i edited my first post to show you what i meant

[EminentJonFrost]

ohhh
i get it now
well not really...
i understand it, but i wouldnt be able to create that on my own.

after looking and thinking at it for a while, then i should be able to do that by myself

thanks

[SG57]

Ya, I would just make an integer named 'menu' (imagine that? lol) and if UP is pressed, than add 1 to that integer, and if DOWN is pressed, than subtract 1 from that integer, and if that integer goes over/under how ever many items on your menu, then have it go back to the end/start. Then just do what he said and use an 'if' statement with a boolean in it to check if that integer is true to a certain number, and if it is true, then do whatever you want.

This is basically what MasterQ did, except it's in words to help you out.

[EminentJonFrost]

what happens now is when i press DOWN, it goes down (so far so good) BUT when i release the down button, it automatically goes back up.
and thats with the code MasterQ gave me.

[alatnet]

Try this:

while true do
	screen:blit(0, 0, mmenu)
	
	pad = Controls.read()

	screen:print(180, 130, " Start Game", white)
	screen:print(180, 140, " Credit", white)
	screen.flip()

--This it to give the user the ability to choose options, but theres an error

	if pad:down() then
                menuitem = menuitem + 1
                if menuitem > 1 then
                        menuitem = 1
                end
        end

	if pad:up() then
                menuitem = menuitem - 1
                if menuitem < 0 then
                        menuitem = 0
                end
        end

        screen:clear()
        screen:blit(0, 0, mmenu)
        if menuitem == 0 then
                screen:print(180, 130, ">Start Game", red)
                screen:print(180, 140, " Credit", white)
        elseif menuitem == 1 then
                screen:print(180, 130, " Start Game", white)
                screen:print(180, 140, ">Credit", red)
        end
        screen.flip()
        screen.waitVblankStart()
end

This should generaly be correct since i use the same method in my acno's energizer game.

[SG57]

Originally Posted by EminentJonFrost

what happens now is when i press DOWN, it goes down (so far so good) BUT when i release the down button, it automatically goes back up.
and thats with the code MasterQ gave me.

Your problem is that you initialized the variable in side of the main loop.

while true do
	 menu = 0
	 ya da ya da
end

When it should be:

menu = 0
while true do
	ya da ya da
end

Basically, everytime your program goes through that loop over and over again, it is seeing menu = 0, so it resets the menu integer number to 0, there fore making it go back up. Just move what ever your integer or variable holding your menu bool, is not inside of any loop.