ComputerCraftSimpleGUIFunctions

-- by ther/carrot xd
-- Monitor is required, but you could set it to term
-- if you want it to draw stuff to the terminal screen
-- so... Monitor = term
MonitorSide = "left"
Monitor = peripheral.wrap(MonitorSide)

function ClearMonitor()
    Monitor.setTextColor(colours.black)
    Monitor.setBackgroundColor(colours.black)
    Monitor.clear()
    Monitor.setCursorPos(1,1)
end

function DrawText(xPos, yPos, text, textColour, backgroundColour)
    Monitor.setBackgroundColor(backgroundColour)
    Monitor.setTextColor(textColour)
    Monitor.setCursorPos(xPos,yPos)
    Monitor.write(text)
end

function DrawCenteredHorizontal(xPos, yPos, width, text, textColour, backgroundColour)
    -- width could be the size of your monitor, or anything else. this means it
    -- doesn't have to stretch your entire monitor's if you want. imagine
    -- it as a rectangle and the text is in the center.
    local textLength = string.len(text)
    local centerX = (width / 2) - (textLength / 2)
    DrawText(xPos + centerX, yPos, text, textColour, backgroundColour)
end

function DrawLineH(xPos, yPos, lineLength, colour)
    Monitor.setBackgroundColor(colour)
    Monitor.setTextColor(colour)
    Monitor.setCursorPos(xPos,yPos)
    Monitor.write(string.rep(" ", lineLength))
end

function DrawLineV(xPos, yPos, width, lineHeight, colour)
    Monitor.setBackgroundColor(colour)
    for i = 1, lineHeight, 1 do
        Monitor.setCursorPos(xPos, yPos + (i - 1))
        Monitor.write(string.rep(" ", width))
    end
end

function DrawSquare(xPos, yPos, nWidth, nHeight, backgroundColour)
    Monitor.setBackgroundColor(backgroundColour)
    for i = 1, math.ceil(nHeight), 1 do
        Monitor.setCursorPos(xPos, yPos + (i - 1))
        Monitor.write(string.rep(" ", nWidth))
    end
end

function ProgressBar(xPos, yPos, width, value, maxValue, backgroundColour, progressColour)
    DrawLineH(xPos, yPos, width, backgroundColour) --backgoround bar
    local barSize = math.floor((value/maxValue) * width)
    DrawLineH(xPos, yPos, barSize, progressColour) --progress so far
end

function GroupBoxHeader(xPos, yPos, width, header, textColour, backgroundColour)
    local headerLength = string.len(header)
    local repeatChars = width - 4 - headerLength

    if (repeatChars < 0) then
        repeatChars = 0
    end

    local head = "--- " .. header .. " " .. string.rep("-", repeatChars)
    DrawText(xPos, yPos, head, textColour, backgroundColour)
end

function GroupBoxFooter(xPos, yPos, width, textColour, backgroundColour)
    if (width < 0) then
        width = 0
    end
    local head = string.rep("-", width)
    DrawText(xPos, yPos, head, textColour, backgroundColour)
end

function GroupBox(xPos, yPos, width, height, header, textColour, headerBackgroundColour)
    GroupBoxHeader(xPos, yPos, width, header, textColour, headerBackgroundColour)
    GroupBoxFooter(xPos, yPos + height + 1, width, textColour, headerBackgroundColour)
end