82d8d6cc43
- Added Grid Layout - Removed Flexbox this will make it easy to apply layouts on all container types.
60 lines
1.9 KiB
Lua
60 lines
1.9 KiB
Lua
local grid = {}
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--- Calculates positions for all children in a grid layout
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--- @param instance table The layout instance
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--- - container: the container to layout
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--- - options: layout options
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--- - rows: number of rows (optional, auto-calculated if not provided)
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--- - columns: number of columns (optional, auto-calculated if not provided)
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--- - spacing: gap between cells (default: 0)
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--- - padding: padding around the grid (default: 0)
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function grid.calculate(instance)
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local container = instance.container
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local options = instance.options or {}
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local children = container.get("children")
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local containerWidth = container.get("width")
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local containerHeight = container.get("height")
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local spacing = options.spacing or 0
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local padding = options.padding or 0
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local rows = options.rows
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local columns = options.columns
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local childCount = #children
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if not rows and not columns then
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columns = math.ceil(math.sqrt(childCount))
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rows = math.ceil(childCount / columns)
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elseif rows and not columns then
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columns = math.ceil(childCount / rows)
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elseif columns and not rows then
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rows = math.ceil(childCount / columns)
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end
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local availableWidth = containerWidth - (2 * padding) - ((columns - 1) * spacing)
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local availableHeight = containerHeight - (2 * padding) - ((rows - 1) * spacing)
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local cellWidth = math.floor(availableWidth / columns)
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local cellHeight = math.floor(availableHeight / rows)
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local positions = {}
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for i, child in ipairs(children) do
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local row = math.floor((i - 1) / columns)
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local col = (i - 1) % columns
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local x = padding + 1 + (col * (cellWidth + spacing))
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local y = padding + 1 + (row * (cellHeight + spacing))
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positions[child] = {
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x = x,
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y = y,
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width = cellWidth,
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height = cellHeight
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}
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end
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instance._positions = positions
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end
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return grid
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