cc/listview.lua
2024-06-03 23:18:16 +02:00

97 lines
2.5 KiB
Lua

ListView = {
backingList = {},
length = 0,
paginationPos = 1,
frame = term.current(),
drawEntry = nil,
}
function ListView:new(o)
o = o or {}
setmetatable(o, self)
self.__index = self
return o
end
function ListView:redrawEntry(idx)
local tw, th = self.frame.getSize()
if idx >= self.paginationPos and idx-self.paginationPos <= th then
self.frame.setCursorPos(1, idx-self.paginationPos+1)
if self.drawEntry then
self.drawEntry(self.frame, self.backingList[idx])
else
self.frame.setBackgroundColor(colors.red)
self.frame.clearLine()
self.frame.setBackgroundColor(colors.black)
end
end
end
function ListView:itemAt(idx)
return self.backingList[idx]
end
function ListView:updateItemAt(idx, item)
self.backingList[idx] = item
if idx > self.length then
self.length = idx
end
self:redrawEntry(idx)
end
function ListView:clearFrom(idx)
local tw, th = self.frame.getSize()
for j = self.length, idx, -1 do
self.backingList[j] = nil
end
self.length = idx-1
for y = idx-self.paginationPos+1, th, 1 do
self.frame.setCursorPos(1, y)
self.frame.clearLine()
end
end
function ListView:redraw()
if self.drawEntry then
local tw, th = self.frame.getSize()
local backingIdx = self.paginationPos
for idx = 1, th, 1 do
self.frame.setCursorPos(1, idx)
if self.backingList[backingIdx] == nil then
self.frame.clearLine()
else
self.drawEntry(self.frame, self.backingList[backingIdx])
end
backingIdx = backingIdx + 1
end
else
self.frame.setBackgroundColor(colors.red)
self.frame.clear()
self.frame.setBackgroundColor(colors.black)
end
end
function ListView:updatePage(scrollPos)
if scrollPos ~= self.paginationPos then
self.paginationPos = scrollPos
self:redraw()
end
end
function ListView:updatePartial(filter)
if self.drawEntry then
local tw, th = self.frame.getSize()
local backingIdx = self.paginationPos
for idx = 1, th, 1 do
self.frame.setCursorPos(1, idx)
if self.backingList[backingIdx] ~= nil and filter(self.backingList[backingIdx]) then
self.self.drawEntry(self.self.frame, self.backingList[backingIdx])
end
backingIdx = backingIdx + 1
end
end
end
return ListView