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Add shift policy to grids

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Insality
2020-11-08 23:20:16 +03:00
parent 560c6cb95f
commit 74efdbfe71
4 changed files with 57 additions and 24 deletions
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13
druid/extended/infinity_list.lua
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@@ -1,6 +1,7 @@
--- Manage data for huge dataset in scroll
--- It requires basic druid scroll and druid grid components
local const = require("druid.const")
local helper = require("druid.helper")
local component = require("druid.component")
local M = component.create("infinity_list", { const.ON_UPDATE })
@@ -12,6 +13,7 @@ function M:init(data_list, scroll, grid, create_function)
self.druid = self:get_druid()
self.scroll = scroll
self.grid = grid
self.scroll:bind_grid(grid)
self.data = data_list
self.top_index = 1
@@ -46,20 +48,27 @@ function M:set_data(data_list)
end
function M:scroll_to_index(index)
self.top_index = helper.clamp(index, 1, #self.data)
self:_refresh()
self.scroll.on_scroll:trigger(self:get_context(), self)
end
function M:_add_at(index)
if self.nodes[index] then
self:_remove_at(index)
end
local node, instance = self.create_function(self.data[index], index)
self.grid:add(node, index)
self.grid:add(node, index, const.SHIFT.NO_SHIFT)
self.nodes[index] = node
self.components[index] = instance
end
function M:_remove_at(index)
self.grid:remove(index)
self.grid:remove(index, const.SHIFT.NO_SHIFT)
local node = self.nodes[index]
gui.delete_node(node)