local next_button = nil
local previous_button = nil
local text_element = nil
local text_process = nil
local uiid = nil
local first_content_process = nil
local number_of_content = nil
local content_1 = nil
local content_2 = nil
local content_3 = nil
 
local click = 0
 
function button(e)
    if e.uielement == next_button then
        click = click + 1
    elseif e.uielement == previous_button then
        click = click - 1
    end
 
    if click < 1 then
        click = 1
    elseif click > number_of_content then
        click = number_of_content
    end
 
    Customui:setText(e.eventobjid, uiid, text_process, first_content_process .. " (".. click.. "/".. number_of_content .. ")")
 
    if click == 1 then
        Customui:setText(e.eventobjid, uiid, text_element, content_1)
    elseif click == 2 then
        Customui:setText(e.eventobjid, uiid, text_element, content_2)
    elseif click == 3 then
        Customui:setText(e.eventobjid, uiid, text_element, content_3)
    end
end
 
ScriptSupportEvent:registerEvent("UI.Button.Click", button)

click variable: is initialized to 0 and is used to keep track of the current position or index of the content being displayed.

if e.uielement == next_button then
    click = click + 1
elseif e.uielement == previous_button then
    click = click - 1
end

• In case the uielement in the event object e matches next_button, the click variable is incremented by 1.
• Provided that matches previous_button, the click variable is decremented by 1.
• This logic updates the click variable to reflect the user's navigation through the content.

    if click < 1 then
        click = 1
    elseif click > number_of_content then
        click = number_of_content
    end

• On conditional that click becomes less than 1, it is set back to 1 to prevent the index from going out of range.
• If click exceeds the value of number_of_content, it is set to number_of_content, ensuring it doesn't go beyond the last content.

  Customui:setText(e.eventobjid, uiid, text_process, first_content_process .. " (".. click.. "/".. number_of_content .. ")")

When the player click on the next or previous button, the text's going to update

if click == 1 then
    Customui:setText(e.eventobjid, uiid, text_element, content_1)
elseif click == 2 then
    Customui:setText(e.eventobjid, uiid, text_element, content_2)
elseif click == 3 then
    Customui:setText(e.eventobjid, uiid, text_element, content_3)
end

• If click == 1, it updates the text_element with content_1.
• If click == 2, it updates the text_element with content_2.
• If click == 3, it updates the text_element with content_3.

This ensures that the correct content is displayed based on the current value of click.

ScriptSupportEvent:registerEvent("UI.Button.Click", button)

This means that whenever a button in the UI is clicked, the button function will be triggered, allowing it to process the event and update the UI accordingly.

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