8 replies to this topic

[_removed]

In conjuction with jasperdekiller's database, I have made a client for it. One of the downsides is that the log might be 50 lines long and the height limit is 19. I am trying to make it so that whenever i scroll down, it will show the rest of the log and vice versa.

I will be happy if I can get a simple but clever answer.

[Bomb Bloke]

Best bet is to bung each line into a separate table index, then just print lines x through to x+18, where x is whatever position you've scrolled to.

I've got some code for a menu that should give you some idea as to how to go about it.

[_removed]

Bomb Bloke, on 14 February 2015 - 10:47 PM, said:

Best bet is to bung each line into a separate table index, then just print lines x through to x+18, where x is whatever position you've scrolled to.

I've got some code for a menu that should give you some idea as to how to go about it.

OK..... No idea what I'm doing here.

All I want is a simple system that if I scroll down, it goes down and if i scroll up, it goes up.

[Bomb Bloke]

Well... what have you got?

[_removed]

Heres the Main: Rxx5WNPW

Heres the API: SfXFSh0a

Im gonna post the part that i want to be edited here:

						    term.setBackgroundColour(colours.black)
							term.clear()
							term.setTextColour(colours.white)
							Log = db.getAllLogs(tonumber(serverID), serverName, serverPass)
							local yPos = 1
							term.setCursorPos(1, yPos)
							for k, v in pairs(Log) do
								if v[2] == "Info" then
									term.setTextColour(colours.blue)
									term.write("[ "..v[2].." ] ")
									term.setTextColour(colours.lightGrey)
									term.write(v[1])
									yPos = yPos + 1
									term.setCursorPos(1, yPos)
								elseif v[2] == "Success" then
									term.setTextColour(colours.green)
									term.write("[ "..v[2].. " ] ")
									term.setTextColour(colours.lightGrey)
									term.write(v[1])
									yPos = yPos + 1
									term.setCursorPos(1, yPos)
								elseif v[2] == "Warning" or v[2] == "Error" or v[2] == "Alert" then
									term.setTextColour(colours.red)
									term.write("[ "..v[2].." ] ")
									term.setTextColour(colours.lightGrey)
									term.write(v[1])
									yPos = yPos + 1
									term.setCursorPos(1, yPos)
								end
							end
							event, key = os.pullEvent("key")
							pageLayout()

Edited by smigger22, 14 February 2015 - 11:07 PM.

[HPWebcamAble]

Don't have time to go through all your code, but this is basically what I would do

items = {
  "This is the first line",
  "This is the second line",
  "This is the third line"
}  --#You probably have more than three lines

local w,h = term.getSize()
local offset = 0

term.setCursorPos(1,1)
if #items > h then
  for i = 1, h do
    term.write(items[#items-(h+offset)+i])
  end
else
  for i = 1, h do
    term.write(items[i])
  end
end

Change 'offset' to move the list up or down.

Like I said, that's the basic idea, you will have to play with it to get it to work.

[Dog]

This isn't as elegant as the other solutions, and it's not based on your code, but it's what I use in my programs. It views/scrolls a page at a time instead of a line at a time. You'll need to make changes to suit your needs. Note that this only works for ordered tables, not sparse tables...

local testData = { "Line 1", "Line 2", "Line 3", "Line 4", "Line 5", "Line 6", "Line 7", "Line 8", "Line 9", "Line 10", "Line 11", "Line 12" } --#substitute this with your actual data

local linesPerPage = 10 --# the number of lines per page (change this to suit your needs)
local pageNum = 1	--# which page we're currently on - we're starting at the first page
local numPages = math.ceil(#testData / linesPerPage) --# total number of pages based on number of entries

local function listPage()
  term.clear()	   --# this is just for this example, you may wish to clear just the area the data fills
  local xPos = 1   --# cursor X position (change this to be your actual 'top' x position)
  local yPos = 1   --# cursor Y position (change this to be your actual 'top' y position)
  local startY = 1 --# this should be equal to the initial yPos value
  local currentEntry = ((pageNum - 1) * (linesPerPage - 1)) + pageNum
  for i = currentEntry, #testData do --# start the listing loop from the current entry
    term.setCursorPos(xPos, yPos)    --# set the cursor position
    term.write(testData[i])	     --# write the data to screen
    yPos = yPos + 1	             --# increment the Y position so the next entry is written on the next display line
    if yPos = startY + linesPerPage then break end --# we've listed the set number of entries per page so stop the loop
  end
end

local function getInput()
  while true do
    local _, scroll = os.pullEvent("mouse_scroll")
    if scroll == 1 then
      pageNum = math.min(pageNum + 1, numPages) --# if the user scrolls down, increment the page number
    elseif scroll == -1 then
      pageNum = math.max(1, pageNum - 1)        --# if the user scrolls up, decrement the page number
    end
    listPage()
  end
end

listPage()
getInput()

Edited by Dog, 15 February 2015 - 02:33 AM.

[_removed]

I understand nothing of what all of you have said.

[_removed]

It doesn't matter because I found a function that scrolls through already.