mirror of
https://github.com/Insality/druid
synced 2025-06-27 10:27:48 +02:00
122 lines
2.9 KiB
Lua
122 lines
2.9 KiB
Lua
-- Copyright (c) 2022 Maksim Tuprikov <insality@gmail.com>. This code is licensed under MIT license
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--- Druid pin knob custom component.
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-- It's simple rotating input element
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-- @module PinKnob
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-- @within BaseComponent
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-- @alias druid.pin_knob
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--- The component druid instance
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-- @tfield DruidInstance druid @{DruidInstance}
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--- Is currently under user control
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-- @tfield boolean is_drag
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--- The pin node
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-- @tfield node node
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---
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local const = require("druid.const")
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local component = require("druid.component")
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local PinKnob = component.create("druid.pin_knob", { const.ON_INPUT })
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local SCHEME = {
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ROOT = "root",
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PIN = "pin",
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}
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local function update_visual(self)
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local rotation = vmath.vector3(0, 0, self.angle)
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gui.set_euler(self.node, rotation)
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end
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local function set_angle(self, value)
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local prev_value = self.angle
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self.angle = value
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self.angle = math.min(self.angle, self.angle_max)
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self.angle = math.max(self.angle, self.angle_min)
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update_visual(self)
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if prev_value ~= self.angle and self.callback then
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local output_value = self.angle
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if output_value ~= 0 then
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output_value = -output_value
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end
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self.callback(self:get_context(), output_value)
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end
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end
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--- The @{PinKnob} constructor
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-- @tparam PinKnob self @{PinKnob}
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-- @tparam function callback Callback(self, value) on value changed
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-- @tparam string template The template string name
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-- @tparam table nodes Nodes table from gui.clone_tree
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function PinKnob.init(self, callback, template, nodes)
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self.druid = self:get_druid(template, nodes)
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self.node = self:get_node(SCHEME.PIN)
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self.is_drag = false
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self.callback = callback
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self:set_angle(0, -100, 100)
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self._friction = 0.75
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end
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--- Set current and min/max angles for component
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-- @tparam PinKnob self @{PinKnob}
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-- @tparam number cur_value The new value for pin knob
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-- @tparam number min The minimum value for pin knob
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-- @tparam number max The maximum value for pin knob
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-- @treturn PinKnob @{PinKnob}
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function PinKnob.set_angle(self, cur_value, min, max)
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self.angle_min = min or self.angle_min
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self.angle_max = max or self.angle_max
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set_angle(self, cur_value)
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return self
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end
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--- Set current and min/max angles for component
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-- @tparam PinKnob self @{PinKnob}
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-- @tparam number|nil value The spin speed multiplier. Default: 1
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-- @treturn PinKnob @{PinKnob}
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function PinKnob.set_friction(self, value)
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self._friction = value or 1
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return self
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end
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function PinKnob.on_input(self, action_id, action)
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if action_id ~= const.ACTION_TOUCH then
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return false
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end
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if gui.pick_node(self.node, action.x, action.y) then
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if action.pressed then
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self.pos = gui.get_position(self.node)
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self.is_drag = true
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end
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end
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if self.is_drag and not action.pressed then
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set_angle(self, self.angle - action.dx * self._friction - action.dy * self._friction)
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end
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if action.released then
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self.is_drag = false
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end
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return self.is_drag
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end
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return PinKnob
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