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https://github.com/Insality/druid.git
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86 lines
2.0 KiB
Lua
86 lines
2.0 KiB
Lua
local helper = require("druid.helper")
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local M = {}
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--- Sort and placing nodes
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-- Plans: placing by max width, placing with max in_row
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-- Allow different node sizes, allow animation with node insert
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function M.init(instance, parent, element, in_row)
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instance.parent = helper.get_node(parent)
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instance.nodes = {}
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instance.offset = vmath.vector3(0)
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instance.anchor = vmath.vector3(0)
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instance.in_row = in_row or 1
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instance.node_size = gui.get_size(helper.get_node(element))
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instance.border = vmath.vector4(0)
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end
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local function check_border(instance, pos)
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local size = instance.node_size
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local W = pos.x - size.x/2
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local E = pos.x + size.x/2
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local N = pos.y + size.y/2
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local S = pos.y - size.y/2
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instance.border.x = math.min(instance.border.x, W)
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instance.border.y = math.max(instance.border.y, N)
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instance.border.z = math.max(instance.border.z, E)
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instance.border.w = math.min(instance.border.w, S)
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end
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local temp_pos = vmath.vector3(0)
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local function get_pos(instance, index)
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local row = math.ceil(index / instance.in_row) - 1
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local col = (index - row * instance.in_row) - 1
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temp_pos.x = col * (instance.node_size.x + instance.offset.x)
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temp_pos.x = temp_pos.x + (0.5 - instance.anchor.x) * instance.node_size.x
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temp_pos.y = -row * (instance.node_size.y + instance.offset.y)
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temp_pos.y = temp_pos.y - (0.5 - instance.anchor.y) * instance.node_size.y
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return temp_pos
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end
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local function update_pos(instance)
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for i = 1, #instance.nodes do
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local node = instance.nodes[i]
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gui.set_position(node, get_pos(instance, i))
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end
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end
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function M.set_offset(instance, offset)
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instance.offset = offset
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update_pos(instance)
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end
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function M.set_anchor(instance, anchor)
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instance.anchor = anchor
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update_pos(instance)
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end
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function M.add(instance, item, index)
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index = index or (#instance.nodes + 1)
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table.insert(instance.nodes, index, item)
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gui.set_parent(item, instance.parent)
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local pos = get_pos(instance, index)
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check_border(instance, pos)
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gui.set_position(item, pos)
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end
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function M.get_size(instance)
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return instance.border
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end
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return M |