widget : table/array/grid/...

[tst2005]

Hello,

Is it planned to have a kind of table/grid widget with luigi ?

Something like :

• the grid of LoveFrames
• the column list of LoveFrames

Is someone already tried to do that ?

Regards,

[airstruck]

Hello! No grid widget is planned, but the LoveFrames grid example would look something like this for Luigi:

local Layout = require 'luigi.layout'

local grid = { flow = 'y' }
local id = 1

for i = 1, 5 do
    local row = { flow = 'x' }
    grid[#grid + 1] = row
    for n = 1, 5 do
        row[#row + 1] = { type = 'button', text = id, height = false }
        id = id + 1
    end
end

local layout = Layout(grid)
layout:show()

Does that work for you?

[tst2005]

Hello,

At first, thanks for your answer! I tested it and it runs! but it's only the beginning ...

I'm trying to show an existing content : a matrix or a sheet. (my final goal is also allowing editing content)

I changed your sample to create a grid that don't have static text but dynamic text (binded on an external data)

local Layout = require 'luigi.layout'

local function new_grid_from_matrix(matrix)
    -- make a text proxy
    local textproxy = function(matrix, x, y)
        return setmetatable({}, {__tostring=function(_self) return matrix[y][x] end})
    end

    local max_x, max_y = #matrix[1], #matrix
    local grid = { flow = 'y' }
    for y = 1, max_y do
        local row = { flow = 'x' }
        for x = 1, max_x do
            row[#row+1] = { type = 'button', text = textproxy(matrix, x, y), height = false }
        end
        grid[#grid+1] = row
    end
    return grid
end

local data = {
    {"-/-", "col a", "col b", "col c"},
    {"1:",  "a1",   "b1",   "c1"    },
    {"2:",  "a2",   "b2",   "c2"    },
    {"3:",  "a3",   "b3",   "c3"    },
    {"4:",  "a4",   "b4",   "c4"    },
    {"5:",  "a5",   "b5",   "c5"    },
}
local grid = new_grid_from_matrix(data)
local layout = Layout(grid)
layout:show()

I replaced the button's text field (that is usually a string) by a special table with custom meta.__tostring handler to return the string value.

To support this approach LUIGI needs some small changes. I suppose there are other part of code to change to fully support text proxy.

Let me know what are you thinking about this feature.

See my current small changes.

Regards,

[airstruck]

All "widget attributes" like text can be set to a function instead of a fixed value. This should work:

row[#row+1] = {
    type = 'button', height = false,
    text = function () return matrix[y][x] end,
}

That function takes the widget as the first argument, so if you don't like creating a separate function for each widget, you could do something like this instead:

local function gridButtonText (self)
    return self.stuff.matrix[self.stuff.y][self.stuff.x]
end

-- ...

row[#row+1] = {
    type = 'button', height = false,
    stuff = { x = x, y = y, matrix = matrix },
    text = gridButtonText,
}