Clicking on stuff in a table

[FlyingSpoon]

I was thinking about something lately, say if I was to create a table -

local t = {
  "First",
  "Second",
  "Third",
  "Fourth"
 } 

function drawText()
  for i, v in ipairs(t) do
    dxDrawText(v, x, y+150, w, h)
  end
end
addEventHandler("onClientRender", root, drawText)

That's a basic code, say if I was to click on the first Text which says "First", how would I make it so that it outputs this text, and gets the right one from the table instead of doing it all manually.

[NeXuS™]

I'll give you some functions, if you don't know how to do it, just reply.

First, you'll have to use getCursorPosition.
If you have the cursor's position, you have to use some math, to calculate if that position is between the text's pos and the text's pos + width.
If it's, you can just output the current text in your forcycle.

[FlyingSpoon]

I get the cursor position part but how would I detect which text the mouse is on.

[NeXuS™]

Using a forcycle, where you cycle through all of the text with it's x, y position and it's width, height.

Edited August 5, 2017 by NeXuS™

[FlyingSpoon]

 

local t = {
  {"First", x, y, w, h},
  {"Second", x, y, w, h},
  {"Third", x, y, w, h},
  {"Fourth", x, y, w, h}
  }

addEventHandler("onClientRender", root, 
  function()
    for i, v in pairs(t) do
      dxDrawText(v[1], v[2]+20, v[3], v[4], v[5])
    end
end)

function detectClicks()
    for k, pos in pairs(t) do
       if isMouseInPosition(pos[2], pos[3], pos[4], pos[5])
        --
       end
    end
end
addEventHandler("onClientClick", root, detectClicks)

function isMouseInPosition ( x, y, width, height )
	if ( not isCursorShowing( ) ) then
		return false
	end
    local sx, sy = guiGetScreenSize ( )
    local cx, cy = getCursorPosition ( )
    local cx, cy = ( cx * sx ), ( cy * sy )
    if ( cx >= x and cx <= x + width ) and ( cy >= y and cy <= y + height ) then
        return true
    else
        return false
    end
end

 

Edited August 5, 2017 by raysmta

[NeXuS™]

Yep, awesome. Do you need further help?

[FlyingSpoon]

Yes, and thank you so much, I was kind of confused on something, you see the detect clicks part, how would I know which text is being pressed? Would I do something like

outputChatBox(pos[1])

I don't get that part, how do I only get a certain text that is clicked.

Edited August 5, 2017 by raysmta

[NeXuS™]

I suppose you have different y position for each text. Try to imagine what your script does. If you don't understand this, just reply.

[FlyingSpoon]

So what I did is right?

function detectClicks()
  for i, pos in pairs(t) do
    if isMouseInPosition(pos[2], pos[3], pos[4], pos[5]) then
      outputChatBox(pos[1])
    end
  end
end
addEventHandler("onClientClick", root, detectClicks)

 

[NeXuS™]

Use return after the outputChatBox, the reason why, is because if you think about it. You found the one text you clicked on, and there won't be anymore, so if you stop the cycle there, you'll save some performance and a micro amount of time.

[FlyingSpoon]

function detectClicks()
  for i, pos in pairs(t) do
    if isMouseInPosition(pos[2], pos[3], pos[4], pos[5]) then
      return outputChatBox(pos[1])
    end
  end
end
addEventHandler("onClientClick", root, detectClicks)

Like that?

[NeXuS™]

I mean, I dont think you want to return anything.

function detectClicks()
	for i, pos in pairs(t) do
		if isMouseInPosition(pos[2], pos[3], pos[4], pos[5]) then
			outputChatBox(pos[1])
			return
		end
	end
end
addEventHandler("onClientClick", root, detectClicks)

But yours should work too.

[FlyingSpoon]

And last thing, which one is the right one to use in addEventHandler, after the handler, so is it root or getRootElement() ? Because when I use getRootElement() sometimes, and when I start another script, it starts this one too.

[NeXuS™]

"root" and getRootElement are the same.

Quote

root -- returns the root element of the server

It's a predefined variable in MTA. What do you mean it starts this one too?

[FlyingSpoon]

Say if I write in one script e.g.

One folder is called - 

script1

And the other one is called -

script2

--

In c.lua in script1 folder I wrote at the end of the function - getRootElement().

So now say if I restart script2 it will also restart script1, and when I change it to root instead of getRootElement(), it works fine, any ideas?

[NeXuS™]

So you have onResourceStart events. Use resourceRoot instead of root.

[FlyingSpoon]

I mean root works perfectly fine, just getRootElement is the problem, and thanks I'll use resourceRoot too.