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June 10, 2022 19:46
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| local Spr = require(game:GetService("ReplicatedStorage"):WaitForChild("Packages"):WaitForChild("Spr")) | |
| export type TargetInstance = Frame | |
| export type InitialPositionFunction = (target: TargetInstance) -> Vector2 | |
| export type NewSpringListElementParams = { | |
| RenderInstance: GuiObject, | |
| SpringDamping: number, | |
| SpringFrequency: number, | |
| CalculateInitalPosition: InitialPositionFunction, | |
| TargetParent: Instance, | |
| } | |
| local function vector2ToUdim2(v2: Vector2): UDim2 | |
| return UDim2.fromOffset(v2.X, v2.Y) | |
| end | |
| local function relativeToAbsolutePos(object: GuiObject, abs: Vector2): UDim2 | |
| return vector2ToUdim2(abs - (object.Parent:IsA("GuiObject") and object.Parent.AbsolutePosition or Vector2.new())) | |
| end | |
| -- A SpringListElement is a object that is in a UIListSpring, it handles the invisible pointer Instance and the actual moving Instance | |
| local SpringListElement = {} | |
| SpringListElement.__index = SpringListElement | |
| function SpringListElement.new(params: NewSpringListElementParams) | |
| local instance = setmetatable({ | |
| _RenderInstance = params.RenderInstance, | |
| _TargetParent = params.TargetParent, | |
| _TargetInstance = nil, | |
| _Damping = params.SpringDamping, | |
| _Freq = params.SpringFrequency, | |
| _Connections = {} :: Array<RBXScriptConnection>, | |
| _Active = true, | |
| _CalcInitialPosition = params.CalculateInitalPosition, | |
| }, SpringListElement) | |
| instance:SetupForTracking() | |
| return instance | |
| end | |
| function SpringListElement:SetupForTracking() | |
| self._TargetInstance = Instance.new("Frame") | |
| self._TargetInstance.Parent = self._TargetParent or self._RenderInstance.Parent | |
| self._TargetInstance.Name = "TARGET" | |
| self._TargetInstance.Transparency = 1 | |
| self._TargetInstance.AnchorPoint = Vector2.new(0.5,0.5) | |
| self._TargetInstance.LayoutOrder = self._RenderInstance.LayoutOrder | |
| self._RenderInstance.Visible = true | |
| self._RenderInstance.Position = relativeToAbsolutePos(self._RenderInstance, self._CalcInitialPosition(self._TargetInstance)) | |
| local function updatePosition() | |
| Spr.target(self._RenderInstance, self._Damping, self._Freq, { | |
| Position = relativeToAbsolutePos(self._RenderInstance, self._TargetInstance.AbsolutePosition), | |
| }); | |
| end | |
| local function updateTargetSize() | |
| self._TargetInstance.Size = vector2ToUdim2(self._RenderInstance.AbsoluteSize) | |
| end | |
| table.insert(self._Connections, self._TargetInstance:GetPropertyChangedSignal("AbsolutePosition"):Connect(updatePosition)) | |
| table.insert(self._Connections, self._TargetInstance:GetPropertyChangedSignal("AbsoluteSize"):Connect(updatePosition)) | |
| table.insert(self._Connections, self._RenderInstance:GetPropertyChangedSignal("AbsoluteSize"):Connect(updateTargetSize)) | |
| updateTargetSize() | |
| updatePosition() | |
| end | |
| function SpringListElement:SetActive(active: boolean) | |
| if (active == self._Active) then | |
| return | |
| end | |
| self._Active = active | |
| if (active == false) then | |
| Spr.stop(self._RenderInstance) | |
| self._TargetInstance:Destroy() | |
| for _, connection in pairs(self._Connections) do | |
| connection:Disconnect() | |
| end | |
| else | |
| self:SetupForTracking() | |
| end | |
| end | |
| function SpringListElement:Destroy() | |
| if (self._TargetInstance.Parent == nil) then | |
| return | |
| end | |
| self:SetActive(false) | |
| end | |
| return SpringListElement |
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| local SpringListElement = require(script:FindFirstChild("SpringListElement")) | |
| export type NewUIListSpringParams = { | |
| InititalChildren: Array<GuiObject>, | |
| Damping: number, | |
| Frequency: number, | |
| Parent: GuiObject, | |
| DefaultInitalPosition: SpringListElement.InitialPositionFunction, | |
| } | |
| --[[ | |
| A UIListSpring extends the UIList object but moves the attached objects using springs | |
| ]] | |
| local UIListSpring = {} | |
| UIListSpring.__index = UIListSpring | |
| function UIListSpring.new(params: NewUIListSpringParams) | |
| local instance = setmetatable({ | |
| _Children = {} :: Array<SpringListElement.SpringListElement>, | |
| _Damp = params.Damping, | |
| _Freq = params.Frequency, | |
| _Parent = params.Parent, | |
| _InitialPosition = params.DefaultInitalPosition, | |
| }, UIListSpring) | |
| instance:Setup(params) | |
| return instance | |
| end | |
| function UIListSpring:AddChild(object: GuiObject, initalPosition: SpringListElement.InitialPositionFunction) | |
| local new = SpringListElement.new({ | |
| CalculateInitalPosition = initalPosition or self._InitialPosition, | |
| RenderInstance = object, | |
| SpringDamping = self._Damp, | |
| SpringFrequency = self._Freq, | |
| TargetParent = self._Parent, | |
| }) | |
| table.insert(self._Children, new) | |
| return new | |
| end | |
| function UIListSpring:RemoveChild(object) | |
| local found = table.find(self._Children, object) | |
| if (not found) then | |
| return false | |
| end | |
| self._Children[found]:Destroy() | |
| table.remove(self._Children, found) | |
| return true | |
| end | |
| function UIListSpring:Setup(params: NewUIListSpringParams) | |
| for _, child in pairs(params.InititalChildren) do | |
| self:AddChild(child) | |
| end | |
| end | |
| export type UIListSpringInstance = typeof(UIListSpring.new()) | |
| export type SpringListElementInstance = typeof(SpringListElement.new()) | |
| return UIListSpring |
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