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  1. API Reference
  2. UISizeConstraint

UISizeConstraint

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  1. apireference
  2. uisizeconstraint

UISizeConstraint

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The UISizeConstraint ensures a GuiObject does not become larger or smaller than the UISizeConstraint/MaxSize and UISizeConstraint/MinSize.

For example, if the MaxSize is set to {200, 200} and the MinSize is set to {100, 100}, then the constrained GuiObject cannot scale to be larger than 200 pixels wide and 200 pixels tall or smaller than 100 pixels wide and 100 pixels tall.

If the object with this constraint is also under the control of a UILayout such as UIGridLayout, then the constraint determines the objects size and overwrites any size the layout would apply.

A UISizeConstraint can be applied to a GuiObject by parenting it to that object.

Properties

Vector2

MaxSize

The largest size in pixels the object is allowed to be.
Vector2

MinSize

The smallest size in pixels the object is allowed to be.

Inherited from Instance: Show Hide

bool

Archivable

Determines if an Instance can be cloned using /Instance/Clone or saved to file.
string

ClassName

[ReadOnly] [NotReplicated]

A read-only string representing the class this Instance belongs to
int

DataCost

[Hidden] [ReadOnly] [NotReplicated] [Deprecated]

The cost of saving the instance using data persistence.
string

Name

A non-unique identifier of the Instance
Instance

Parent

[NotReplicated]

Determines the hierarchical parent of the Instance
bool

RobloxLocked

[Hidden]

A deprecated property that used to protect CoreGui objects
bool

archivable

[Hidden] [NotReplicated] [Deprecated]
string

className

[ReadOnly] [NotReplicated] [Deprecated]

Functions

Inherited from Instance: Show Hide

void

ClearAllChildren ( )

This function destroys all of an Instance’s children.
Instance

Clone ( )

Create a copy of an object and all its descendants, ignoring objects that are not Instance/Archivable|Archivable
void

Destroy ( )

Sets the Instance/Parent property to nil, locks the Instance/Parent property, disconnects all connections and calls Destroy on all children.
Instance

FindFirstAncestor ( string name )

Returns the first ancestor of the Instance whose Instance/Name is equal to the given name.
Instance

FindFirstAncestorOfClass ( string className )

Returns the first ancestor of the Instance whose Instance/ClassName is equal to the given className.
Instance

FindFirstAncestorWhichIsA ( string className )

Returns the first ancestor of the Instance for whom Instance/IsA returns true for the given className.
Instance

FindFirstChild ( string name , bool recursive )

Returns the first child of the Instance found with the given name.
Instance

FindFirstChildOfClass ( string className )

Returns the first child of the Instance whose Instance/ClassName|ClassName is equal to the given className.
Instance

FindFirstChildWhichIsA ( string className , bool recursive )

Returns the first child of the Instance for whom Instance/IsA returns true for the given className.
Instance

GetActor ( )

Variant

GetAttribute ( string attribute )

Returns the attribute which has been assigned to the given name
RBXScriptSignal

GetAttributeChangedSignal ( string attribute )

Returns an event that fires when the given attribute changes
Dictionary

GetAttributes ( )

Returns a dictionary of string → variant pairs for each of the Instance|Instance’s attributes
Objects

GetChildren ( )

Returns an array containing all of the Instance’s children.
string

GetDebugId ( int scopeLength )

[NotBrowsable]

Returns a coded string of the Instances DebugId used internally by Roblox.
Array

GetDescendants ( )

[CustomLuaState]

Returns an array containing all of the descendants of the instance
string

GetFullName ( )

Returns a string describing the Instance’s ancestry.
RBXScriptSignal

GetPropertyChangedSignal ( string property )

Get an event that fires when a given property of an object changes.
bool

IsA ( string className )

[CustomLuaState]

Returns true if an Instance’s class matches or inherits from a given class
bool

IsAncestorOf ( Instance descendant )

Returns true if an Instance is an ancestor of the given descendant.
bool

IsDescendantOf ( Instance ancestor )

Returns true if an Instance is a descendant of the given ancestor.
void

Remove ( )

[Deprecated]

Sets the object’s Parent to nil, and does the same for all its descendants.
void

SetAttribute ( string attribute , Variant value )

Sets the attribute with the given name to the given value
Instance

WaitForChild ( string childName , double timeOut )

[CustomLuaState] [CanYield]

Returns the child of the Instance with the given name. If the child does not exist, it will yield the current thread until it does.
Objects

children ( )

[Deprecated]

Returns an array of the object’s children.
Instance

clone ( )

[Deprecated]
void

destroy ( )

[Deprecated]
Instance

findFirstChild ( string name , bool recursive )

[Deprecated]
Objects

getChildren ( )

[Deprecated]
bool

isA ( string className )

[Deprecated] [CustomLuaState]
bool

isDescendantOf ( Instance ancestor )

[Deprecated]
void

remove ( )

[Deprecated]

Events

Inherited from Instance: Show Hide

RBXScriptSignal

AncestryChanged ( Instance child , Instance parent )

Fires when the Instance/Parent property of the object or one of its ancestors is changed.
RBXScriptSignal

AttributeChanged ( string attribute )

Fires whenever an attribute is changed on the Instance
RBXScriptSignal

Changed ( string property )

Fired immediately after a property of an object changes.
RBXScriptSignal

ChildAdded ( Instance child )

Fires when an object is parented to this Instance.
RBXScriptSignal

ChildRemoved ( Instance child )

Fires when a child is removed from this Instance.
RBXScriptSignal

DescendantAdded ( Instance descendant )

Fires when a descendant is added to the Instance
RBXScriptSignal

DescendantRemoving ( Instance descendant )

Fires immediately before a descendant of the Instance is removed.
RBXScriptSignal

childAdded ( Instance child )

[Deprecated]

Code Samples

Creating a GUI With a UISizeConstraint

This example creates a new anchored ScreenGui. It then creates a Frame and sets its parent to the created ScreenGui.

Then, it creates a new UISizeConstraint with a MaxSize of {250, 250} and MinSize of {50, 50}. To display the functionality of this constraint, we then set the size of the Frame we created to {(0, 400), (0, 400)}. Due to the constraint, the Frame will only scale to {(0, 250), (0, 250)} instead of the set size.

Please note that you can easily change the constraints in the example below to adjust the MaxSize and MinSize constraints on Frame set by the code.

-- Create a ScreenGui container for the Frame
local ScreenGui = Instance.new("ScreenGui")
ScreenGui.Parent = game.StarterGui

-- Create the frame
local frame = Instance.new("Frame")
frame.Parent = ScreenGui
frame.Size = UDim2.new(0, 400, 0, 400)

-- Create the UISizeConstraint
local constraint = Instance.new("UISizeConstraint")
constraint.Parent = frame
constraint.MaxSize = Vector2.new(250, 250)
constraint.MinSize = Vector2.new(50, 50)
UIScale UITableLayout