FVector2D SConstraintCanvas::ComputeDesiredSize( float ) const
{
FVector2D DesiredSize(0,0);
// Arrange the children now in their proper z-order.
for ( int32 ChildIndex = 0; ChildIndex < Children.Num(); ++ChildIndex )
{
const SConstraintCanvas::FSlot& CurChild = Children[ChildIndex];
const TSharedRef<SWidget>& Widget = CurChild.GetWidget();
// As long as the widgets are not collapsed, they should contribute to the desired size.
if ( Widget->GetVisibility() != EVisibility::Collapsed )
{
const FMargin Offset = CurChild.OffsetAttr.Get();
const FVector2D Alignment = CurChild.AlignmentAttr.Get();
const FAnchors Anchors = CurChild.AnchorsAttr.Get();
const FVector2D SlotSize = FVector2D(Offset.Right, Offset.Bottom);
const FVector2D WidgetDesiredSize = Widget->GetDesiredSize();
const bool AutoSize = CurChild.AutoSizeAttr.Get();
const FVector2D Size = AutoSize ? WidgetDesiredSize : SlotSize;
const bool bIsDockedHorizontally = ( Anchors.Minimum.X == Anchors.Maximum.X ) && ( Anchors.Minimum.X == 0 || Anchors.Minimum.X == 1 );
const bool bIsDockedVertically = ( Anchors.Minimum.Y == Anchors.Maximum.Y ) && ( Anchors.Minimum.Y == 0 || Anchors.Minimum.Y == 1 );
DesiredSize.X = FMath::Max(DesiredSize.X, Size.X + ( bIsDockedHorizontally ? FMath::Abs(Offset.Left) : 0.0f ));
DesiredSize.Y = FMath::Max(DesiredSize.Y, Size.Y + ( bIsDockedVertically ? FMath::Abs(Offset.Top) : 0.0f ));
}
}
return DesiredSize;
}
FVector2D SConstraintCanvas::ComputeDesiredSize() const
{
FVector2D DesiredSize(0,0);
// Arrange the children now in their proper z-order.
for ( int32 ChildIndex = 0; ChildIndex < Children.Num(); ++ChildIndex )
{
const SConstraintCanvas::FSlot& CurChild = Children[ChildIndex];
const FMargin Offset = CurChild.OffsetAttr.Get();
const FVector2D Alignment = CurChild.AlignmentAttr.Get();
const FAnchors Anchors = CurChild.AnchorsAttr.Get();
const FVector2D SlotSize = FVector2D(Offset.Right, Offset.Bottom);
const FVector2D WidgetDesiredSize = CurChild.GetWidget()->GetDesiredSize();
const bool AutoSize = CurChild.AutoSizeAttr.Get();
const FVector2D Size = AutoSize ? WidgetDesiredSize : SlotSize;
const bool bIsDockedHorizontally = ( Anchors.Minimum.X == Anchors.Maximum.X ) && ( Anchors.Minimum.X == 0 || Anchors.Minimum.X == 1 );
const bool bIsDockedVertically = ( Anchors.Minimum.Y == Anchors.Maximum.Y ) && ( Anchors.Minimum.Y == 0 || Anchors.Minimum.Y == 1 );
DesiredSize.X = FMath::Max(DesiredSize.X, Size.X + ( bIsDockedHorizontally ? FMath::Abs(Offset.Left) : 0.0f ));
DesiredSize.Y = FMath::Max(DesiredSize.Y, Size.Y + ( bIsDockedVertically ? FMath::Abs(Offset.Top) : 0.0f ));
}
return DesiredSize;
}
