fsEAPI example

--let's say the API is in /fsEAPI
os.loadAPI("/fsEAPI")
--make a table for the items, this is necessary
local items = {}
local debug = fs.open("/debug", "w")
--add a button to the screen, labeled 'myButton' --> items['myButton']
fsEAPI.addButton(items, "myButton", "Button", 6, 2, 2)

--add a textbox to the screen, labeled 'myTextBox' --> items['myTextBox']
fsEAPI.addTextBox(items, "myTextBox", "Edit me senpai", 20, 2, 4)

--add a scrollbox to the screen, labeled 'myScrollBox' --> items['myScrollBox']
fsEAPI.addScrollBox(items, "myScrollBox", 20, 3, 2, 6)
--add a label
fsEAPI.addLabel(items, "myLabel", "Hello, World!", 20, 2, 10)
--add 'Hello' into the scrollbox
fsEAPI.addChild(items['myScrollBox'], "Hello")
--add 'My' into the scrollbox
fsEAPI.addChild(items['myScrollBox'], "My")
--add 'Friend' into the scrollbox
fsEAPI.addChild(items['myScrollBox'], "Friend")
--add 'Lolz' into the scrollbox
fsEAPI.addChild(items['myScrollBox'], "Lolz")
--add a context menu for the scrollbox, containing "Open" and "Delete"
--'bg' is the backgroundcolor and 'fg' is the textcolor
local list = {
    {
        text = "Open",
        bg = colors.white,
        fg = colors.blue,
    },
    {
        text = "Delete",
        bg = colors.white,
        fg = colors.red,
    },
}
--now create a context menu for that scrollbox giving the made list
local ok, err = fsEAPI.addContextMenu(items['myScrollBox'], list)
--preselect an item in myScrollBox, 2 should be 'My'
items['myScrollBox'].childs[2].selected = true

--clear the screen and draw every child
fsEAPI.updateAll(items, colors.black)
--Everything should be drawn on a black screen now

--Now create a coroutine for reading the events so you can still process the information, you don't have to do that tho, you can use parallel too for example

local c = coroutine.create(fsEAPI.run)
--the way my API is made, it works by just resuming the coroutine with the table for "initializing"
coroutine.resume(c, items)
--this coroutine has your table now loaded and returns events just for that table
--now start reading events and process the output
local file = fs.open("/log", "w")
--for testing purposes, we'll log the events
--create a table for events (e.g. mouseclicks)
local evt = {}
--initialize a loop
while true do
  coroutine.resume(c, unpack(evt))
  evt = {os.pullEvent()}
  --now check if your coroutine returned any button clicks
  if evt[1] == "button_press" then
    --if a button was pressed
    --log that and the name (key) of the button
    file.writeLine("Button: "..evt[3].." was pressed.")
    file.flush()
  elseif evt[1] == "scrollBox_select" then
    --if an item in the myScrollBox was selected
    --log that and the name (table.text) of the item
    file.writeLine("Item: "..evt[3]..": child: "..items[evt[3]].childs[evt[4]].text.." was selected.")
    file.flush()
    --edit the text of myLabel to the selected item and update
    items["myLabel"].text = items[evt[3]].childs[evt[4]].text
    fsEAPI.update(items.myLabel)
  elseif evt[1] == "context_select" and evt[2] == "myScrollBox" then
    --if something inside the context window (specificly from myScrollBox) is clicked, log that
    file.writeLine("Item: "..evt[2]..": child: "..items.myScrollBox.childs[evt[3]].text.." context: "..evt[4].." was clicked.")
    file.flush()
    if evt[4] == "Delete" then
        fsEAPI.removeChild(items.myScrollBox, evt[3])
        fsEAPI.update(items.myScrollBox)
    end
  elseif evt[1] == "textBox_input" and evt[3] == "myTextBox" then
    --if something was written in the textbox, log it and add a new child to the scrollbox
    file.writeLine("Item: "..evt[3].." was edited.")
    file.flush()
    fsEAPI.addChild(items.myScrollBox, items.myTextBox.text)
    fsEAPI.update(items.myScrollBox)
  end
end