Lua Programming Help Thread

Im in need of a little bit of help. Im having problems getting my start menu working the way it should. What im trying to do is, after you press start to bring up the startmenu pressing start again should make it go away.. this can work using the break function to make the start menu go away instead of the whole script but i still need to know what to put to make it use the start button after it has allready been pressed to bring it up. Heres my code.

Code:

---

if pad:start() then
                while true do
                        screen:clear()
            screen:blit(0,0,board)
                        pad=Controls.read()
                        if pad:up() and oldpad:up()~=pad:up() then
                                sel=sel-1
                        elseif pad:down() and oldpad:down()~=pad:down() then
                                sel=sel+1
                        end
                        if sel<1 then sel=4 end
                        if sel>4 then sel=1 end
                        local choice={"Save","Save & Quit","Quit","Cancel"}
                        local chcol={editcolor,editcolor,editcolor,editcolor}
                        chcol[sel]=selecolor
            screen:blit(190,106,start)
                        screen:print(224,117,choice[1],chcol[1])
                        screen:print(196,127,choice[2],chcol[2])
                        screen:print(224,137,choice[3],chcol[3])
                        screen:print(216,147,choice[4],chcol[4])
                        if pad:cross() then
                                if sel==1 or sel==2 then
                                        local file=io.open("./memos/"..field,"w")
                                        file:write(field2)
                                        file:close()
                                end
                                if sel==2 or sel==3 then
                                        goprg = false
                                        background=Image.load("./images/background.png")
                                        tfread = false
                                          end
                              break
                              end

                        screen.waitVblankStart()
                        screen:flip()
                        oldpad=pad
                end

---

i have got this to work the way i want by simply using

Code:

---

if pad:circle() then
                  break
                  end

---

but, circle is not the buton i want to use, its start that i need.

and another question i have is, how do i make it so pressing circle makes this only select once instead of switching back and forth real fast..

Code:

---

elseif pad:circle() then
          if fieldedit == 1 then fieldedit = 2
          else                  fieldedit = 1
          end

---

what that does it when you press ( and hold ) circle it switches between the two really fast and makes it hard to select. i need to know how to make it only switch once per time your press circle.

Well I don't feel like reading your code, so I won't answer your first question. But I'll answer you second one.

Put this above your "while true do":

oldpad = Controls.read()

Put this under it if you haven't already

pad = Controls.read()

Put this after your "screen.flip"

oldpad = pad

now change "if pad:circle()" to this

if pad:circle() and oldpad:circle() ~= pad:circle() then

This will make it so it only changes once when you press circle.
-= Double Post =-
Wait, I know the ansere to your first question. You used the start button in your main loop. But you didn't use it in your pause function. So you can just do this

if pad:start() then
break
end

But I would replace both of your "if pad:start()" with:

if pad:start() and oldpad:start() ~= pad:start() then

Not doing this would make it pause and unpause very quickly.

Zitat:

---

Zitat von Branin

Im in need of a little bit of help. Im having problems getting my start menu working the way it should. What im trying to do is, after you press start to bring up the startmenu pressing start again should make it go away.. this can work using the break function to make the start menu go away instead of the whole script but i still need to know what to put to make it use the start button after it has allready been pressed to bring it up. Heres my code.

Code:

---

if pad:start() then
                while true do
                        screen:clear()
            screen:blit(0,0,board)
                        pad=Controls.read()
                        if pad:up() and oldpad:up()~=pad:up() then
                                sel=sel-1
                        elseif pad:down() and oldpad:down()~=pad:down() then
                                sel=sel+1
                        end
                        if sel<1 then sel=4 end
                        if sel>4 then sel=1 end
                        local choice={"Save","Save & Quit","Quit","Cancel"}
                        local chcol={editcolor,editcolor,editcolor,editcolor}
                        chcol[sel]=selecolor
            screen:blit(190,106,start)
                        screen:print(224,117,choice[1],chcol[1])
                        screen:print(196,127,choice[2],chcol[2])
                        screen:print(224,137,choice[3],chcol[3])
                        screen:print(216,147,choice[4],chcol[4])
                        if pad:cross() then
                                if sel==1 or sel==2 then
                                        local file=io.open("./memos/"..field,"w")
                                        file:write(field2)
                                        file:close()
                                end
                                if sel==2 or sel==3 then
                                        goprg = false
                                        background=Image.load("./images/background.png")
                                        tfread = false
                                          end
                              break
                              end

                        screen.waitVblankStart()
                        screen:flip()
                        oldpad=pad
                end

---

i have got this to work the way i want by simply using

Code:

---

if pad:circle() then
                  break
                  end

---

but, circle is not the buton i want to use, its start that i need.

and another question i have is, how do i make it so pressing circle makes this only select once instead of switching back and forth real fast..

Code:

---

elseif pad:circle() then
          if fieldedit == 1 then fieldedit = 2
          else                  fieldedit = 1
          end

---

what that does it when you press ( and hold ) circle it switches between the two really fast and makes it hard to select. i need to know how to make it only switch once per time your press circle.

---

to make the circle stop going insanely fast switching between its actions, just put "screen.waitVblankStart(1 0)" at the top of "end". (so its the last thing that the small loop does. thatll work.

as for pressing start, make the whole code under "if pad:start() then" a function.

then put:

Code:

---

if pad:start() then
your-function-name-here()
end

---

and to make it go back, in your new function, put "if pad:start() then break end".

there you go. : )

Can anyone tell me if string.gmatch is implemented in the latest version of LuaPlayer? It doesn't seem to have it in the Windows version.

(Note that I can't check since I don't have a PSP capable of homebrew. I am just trying to help someone else out).

Ok, iv tried what you have said but now pressing circle does nothing at all, no errors or a anything.

Code:

---

screen:waitVblankStart(10)
          screen:flip()
          pad = Controls.read()
          elseif pad:circle() and pad:circle() ~= oldpad:circle() then
          if fieldedit == 1 then fieldedit = 2
          else                  fieldedit = 1
          end
          DisplayScreen()
          screen:waitVblankStart()
          screen:flip()
        else
          screen:waitVblankStart()
        end
      end
    end
  else
    screen:waitVblankStart(10)
  end
oldpad = pad
end

---

above is the very end of my script.. can anyone tell me why pressing circle does nothing now.

You put this:

elseif pad:circle() and pad:circle() ~= oldpad:circle() then

it should be

elseif pad:circle() and OLDpad:circle() ~= PAD:circle() then

See the changes?

same thing bro, still does nothing.

Someone else had a similar problem using oldpad:
http://forums.qj.net/psp-development-forum/65412-wip-assualt-beta-1-a-3.html

Zitat:

---

Zitat von Access_Denied

You put this:

elseif pad:circle() and pad:circle() ~= oldpad:circle() then

it should be

elseif pad:circle() and OLDpad:circle() ~= PAD:circle() then

See the changes?

---

Doesn't matter, both lines are logically the same.
A ~= B is the same as B ~= A

Did you put in this line before your "while true do"?

oldpad = Controls.read()

If he didn't, it would crash since oldpad would be nil.

Try this:

Code:

---

LastCircleKeyState = false;

while true do
-- blah blah
pad = Controls.read();

if pad:circle() then
if not LastCircleKeyState then
-- do stuff
end
LastCircleKeyState = true;
else
LastCircleKeyState = false;
end
-- blah blah
end

---