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https://github.com/Insality/druid.git
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160 lines
3.3 KiB
Lua
160 lines
3.3 KiB
Lua
--- Druid helper module
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-- @module helper
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local const = require("druid.const")
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local M = {}
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--- Text node or icon node can be nil
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local function get_text_width(text_node)
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if text_node then
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local text_metrics = gui.get_text_metrics_from_node(text_node)
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local text_scale = gui.get_scale(text_node).x
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return text_metrics.width * text_scale
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end
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return 0
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end
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local function get_icon_width(icon_node)
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if icon_node then
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local icon_scale_x = gui.get_scale(icon_node).x
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return gui.get_size(icon_node).x * icon_scale_x -- icon width
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end
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return 0
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end
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--- Text node or icon node can be nil
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function M.centrate_text_with_icon(text_node, icon_node, margin)
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margin = margin or 0
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local text_width = get_text_width(text_node)
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local icon_width = get_icon_width(icon_node)
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local width = text_width + icon_width
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if text_node then
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local pos = gui.get_position(text_node)
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pos.x = -width/2 + text_width - margin/2
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gui.set_position(text_node, pos)
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end
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if icon_node then
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local icon_pos = gui.get_position(icon_node)
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icon_pos.x = width/2 - icon_width + margin/2
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gui.set_position(icon_node, icon_pos)
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end
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end
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--- Icon node or text node can be nil
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function M.centrate_icon_with_text(icon_node, text_node, margin)
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margin = margin or 0
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local icon_width = get_icon_width(icon_node)
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local text_width = get_text_width(text_node)
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local width = text_width + icon_width
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if text_node then
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local pos = gui.get_position(text_node)
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pos.x = width/2 - text_width + margin/2
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gui.set_position(text_node, pos)
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end
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if icon_node then
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local icon_pos = gui.get_position(icon_node)
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icon_pos.x = -width/2 + icon_width - margin/2
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gui.set_position(icon_node, icon_pos)
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end
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end
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function M.get_node(node_or_name)
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if type(node_or_name) == const.STRING then
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return gui.get_node(node_or_name)
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end
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return node_or_name
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end
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-- TODO: Определиться с get_node и node
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-- get_node - берет ноду по ноде или строке
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-- node - может брать ноду у компонента по схеме (если есть
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-- template или таблица нод после gui.clone_tree)
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function M.node(component, name)
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local template_name = component._meta.template or const.EMPTY_STRING
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local nodes = component._meta.nodes
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if nodes then
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return nodes[template_name .. name]
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else
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return gui.get_node(template_name .. name)
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end
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end
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function M.step(current, target, step)
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if current < target then
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return math.min(current + step, target)
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else
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return math.max(target, current - step)
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end
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end
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function M.clamp(a, min, max)
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if min > max then
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min, max = max, min
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end
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if a >= min and a <= max then
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return a
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elseif a < min then
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return min
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else
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return max
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end
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end
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function M.distance(x1, y1, x2, y2)
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return math.sqrt((x2 - x1) ^ 2 + (y2 - y1) ^ 2)
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end
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function M.sign(val)
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if val == 0 then
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return 0
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end
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return (val < 0) and -1 or 1
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end
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function M.round(num, numDecimalPlaces)
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local mult = 10^(numDecimalPlaces or 0)
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return math.floor(num * mult + 0.5) / mult
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end
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function M.is_enabled(node)
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local is_enabled = gui.is_enabled(node)
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local parent = gui.get_parent(node)
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while parent and is_enabled do
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is_enabled = is_enabled and gui.is_enabled(parent)
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parent = gui.get_parent(parent)
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end
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return is_enabled
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end
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function M.get_pivot_offset(pivot)
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return const.PIVOTS[pivot]
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end
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return M
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