Trigger server/client event doesn't work

[Ziemo]

Hi, I have a little problem with my script. I wanted to use server variable in client-side script, so I used trigger server and client event, but unfortunately, it didn't work. Do you know why?

PS: This script has to display variable characterName in grid row.

SERVER SIDE SCRIPT:

function getCharacterName(characterName)
        local characterName = 'James'
        triggerClientEvent ( thePlayer, 'getCharName', thePlayer, characterName )
end
addEvent('getCharacterName', true)
addEventHandler('getCharacterName', root, getCharacterName)

CLIENT-SIDE SCRIPT:

function openCharacterMenu(characterName)
    menu = guiCreateWindow(0.5, 0.5, 0.2, 0.25, 'Characters', true)
    charactersList = guiCreateGridList(0.5, 0.5, 0.4, 0.6, true, menu)
    charactersColumn = guiGridListAddColumn(charactersList, 'Characters', 0.6)
    charactersRow = guiGridListAddRow(charactersList, 'No characters found')
  
  guiGridListSetItemText(charactersList, charactersColumn, charactersRow, characterName, false, false)
end
addEvent('getCharName', true)
addEventHandler('login.success', localPlayer, openCharacterMenu)

I see one error in client debug: Bad argument @ 'gu'iGridListSetItemText [expected string at argument 4 got, nil]

Event 'login.success' opens up characters gui

[IIYAMA]

getCharName is a different event than login.success.

Use getCharName on line 10, instead of login.success.

[Ziemo]

But it won't open up the whole gui. I want to open this gui after successful client login. 

[IIYAMA]

6 minutes ago, Ziemo said:

But it won't open up the whole gui. I want to open this gui after successful client login. 

 

You cannot change two tasks in to one task, that is not logic, even for humans.

 

Task 1.

Send over the name. (Save in to a variable)

 

 

Task 2.

Open the GUI and use the variable.

[Ziemo]

21 minutes ago, IIYAMA said:

 

You cannot change two tasks in to one task, that is not logic, even for humans.

 

Task 1.

Send over the name. (Save in to a variable)

 

 

Task 2.

Open the GUI and use the variable.

So how can i make a function that calls server-side variable?

[IIYAMA]

1 minute ago, Ziemo said:

So how can i make a function that calls server-side variable?

clientside variable. You must have already send it before you login.

[Ziemo]

1 hour ago, IIYAMA said:

clientside variable. You must have already send it before you login.

so client variable should look like this?

characterName = triggerServerEvent('getCharacterName', localPlayer, characterName)

 

[IIYAMA]

triggerServerEvent cannot send that data back like that. We are talking about two different systems that have a connection delay in between. (also known as PING)

 

If you want that name clientside and clientside is the one that is requesting it.

 

A clientside (request) > B serverside (getting the name) > clientside (receive)

A triggerServerEvent > B triggerClientEvent

[Ziemo]

so this variable in client script should look like this?

characterName = triggerServerEvent('getCharacterName', localPlayer, characterName)

 

[ds1-e]

44 minutes ago, Ziemo said:

so this variable in client script should look like this?

characterName = triggerServerEvent('getCharacterName', localPlayer, characterName)

 

triggerServerEvent:

Returns true if the event trigger has been sent, false if invalid arguments were specified or a client side element was a parameter.

I'll show you an example, to make things easier for you. It wasn't tested, but should work.

-- clientside

local first_variable = "Empty"
local second_variable = "Nothing here"

triggerServerEvent("onPlayerUseItem", getLocalPlayer(), first_variable, second_variable)

-- serverside

function onPlayerUseItem(first_arg, second_arg)
	local player = source -- event source
	outputChatBox(first_arg..", "..second_arg, player)
end
addEvent("onPlayerUseItem", true)
addEventHandler("onPlayerUseItem", getRootElement(), onPlayerUseItem)

This example shows how to get data from trigger, and if you want you can save it to variable.

Edited April 24, 2019 by majqq

[Ziemo]

2 hours ago, majqq said:

triggerServerEvent:

Returns true if the event trigger has been sent, false if invalid arguments were specified or a client side element was a parameter.

I'll show you an example, to make things easier for you. It wasn't tested, but should work.

-- clientside

local first_variable = "Empty"
local second_variable = "Nothing here"

triggerServerEvent("onPlayerUseItem", getLocalPlayer(), first_variable, second_variable)

-- serverside

function onPlayerUseItem(first_arg, second_arg)
	local player = source -- event source
	outputChatBox(first_arg..", "..second_arg, player)
end
addEvent("onPlayerUseItem", true)
addEventHandler("onPlayerUseItem", getRootElement(), onPlayerUseItem)

This example shows how to get data from trigger, and if you want you can save it to variable.

I think it will work, but I want to make the opposite thing, pass a variable from server to client.

[Ziemo]

I changed my code to this:

SERVER:

local characterName = 'John Doe'

triggerClientEvent('showCharacters', root, characterName)

CLIENT:

function showCharacters(characterName)
	outputChatBox(characterName, localPlayer)
end
addEvent('showCharacters', true)
addEventHandler('onResourceStart', localPlayer, showCharacters)

But it isn't working. I have an error: Server triggered clientside event showCharacters, but event is not added clientside.

[IIYAMA]

34 minutes ago, Ziemo said:

I changed my code to this:

SERVER:

local characterName = 'John Doe'

triggerClientEvent('showCharacters', root, characterName)

CLIENT:

function showCharacters(characterName)
	outputChatBox(characterName, localPlayer)
end
addEvent('showCharacters', true)
addEventHandler('onResourceStart', localPlayer, showCharacters)

But it isn't working. I have an error: Server triggered clientside event showCharacters, but event is not added clientside.

1. Because the client hasn't loaded yet.
2. Because the addEventHandler hasn't the right event. Should be "showCharacters"
3. The base Element is incorrect. You sending the parent = root from serverside element to a handler with the child = localPlayer at clientside.
   root (container) > localPlayer (child) < NOT WORKING
   localPlayer (child) > root (container) < WORKING
    
4. (You are sending a triggerClientEvent, without target, so sending it to every player in game.)

 

In case of sending it directly after loading the resource: (best practice)

 

CLIENT

addEventHandler("onClientResourceStart", resourceRoot, 
function () 
	triggerServerEvent("onThisClientResourceStart", resourceRoot)  
end, false)

 

SERVER

local characterName = 'John Doe'

addEvent("onThisClientResourceStart", true)
addEventHandler("onThisClientResourceStart", resourceRoot, 
function () 
    -- client is the target (the player that executed the event: onThisClientResourceStart)
	triggerClientEvent(client, 'showCharacters', resourceRoot, characterName) 
end, false)

 

CLIENT

function showCharacters(characterName)
	outputChatBox(characterName) -- localPlayer < this is running on the client/player his pc. No need to define the receiver, as only this player can receive the message
end
addEvent('showCharacters', true)
addEventHandler('showCharacters', resourceRoot, showCharacters, false)

 

 

 

 

 

 

Edited April 24, 2019 by IIYAMA

[Ziemo]

It's working, thank you both so much!