EInvalidateWidgetReason

The different types of invalidation that are possible for a widget.

Choose your operating system:

Windows

macOS

Linux

References

Module

SlateCore

Header

/Engine/Source/Runtime/SlateCore/Public/Widgets/InvalidateWidgetReason.h

Include

#include "Widgets/InvalidateWidgetReason.h"

Syntax

enum EInvalidateWidgetReason
{
    None                     = 0,
    Layout                   = 1 << 0,
    Paint                    = 1 << 1,
    Volatility               = 1 << 2,
    ChildOrder               = 1 << 3,
    RenderTransform          = 1 << 4,
    Visibility               = 1 << 5,
    AttributeRegistration    = 1 << 6,
    Prepass                  = 1 << 7,
    PaintAndVolatility       = Paint | Volatility,
    LayoutAndVolatility      = Layout | Volatility,
}

Values

Name

Description

None

Layout

Use Layout invalidation if your widget needs to change desired size.

Paint

Use when the painting of widget has been altered, but nothing affecting sizing.

Volatility

Use if just the volatility of the widget has been adjusted.

ChildOrder

A child was added or removed. (this implies prepass and layout)

RenderTransform

A Widgets render transform changed

Visibility

Changing visibility (this implies layout)

AttributeRegistration

Attributes got bound or unbound (it's used by the SlateAttributeMetaData)

Prepass

Re-cache desired size of all of this widget's children recursively (this implies layout)

PaintAndVolatility

Use Paint invalidation if you're changing a normal property involving painting or sizing.

LayoutAndVolatility

Use Layout invalidation if you're changing a normal property involving painting or sizing.

Remarks

The different types of invalidation that are possible for a widget.