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