FWidgetPath FWeakWidgetPath::ToNextFocusedPath(EUINavigation NavigationType, const FNavigationReply& NavigationReply, const FArrangedWidget& RuleWidget)
{
check(NavigationType == EUINavigation::Next || NavigationType == EUINavigation::Previous);
// Make a copy of the focus path. We will mutate it until it meets the necessary requirements.
FWidgetPath NewFocusPath = this->ToWidgetPath();
TSharedPtr<SWidget> CurrentlyFocusedWidget = this->Widgets.Last().Pin();
bool bMovedFocus = false;
// Attempt to move the focus starting at the leafmost widget and bubbling up to the root (i.e. the window)
for (int32 FocusNodeIndex=NewFocusPath.Widgets.Num()-1; !bMovedFocus && FocusNodeIndex >= 0; --FocusNodeIndex)
{
// We've reached the stop boundary and not yet moved focus, so don't advance.
if ( NavigationReply.GetBoundaryRule() == EUINavigationRule::Stop && RuleWidget.Widget == NewFocusPath.Widgets[FocusNodeIndex].Widget )
{
break;
}
//TODO Slate Navigation Handle Wrap.
bMovedFocus = NewFocusPath.MoveFocus(FocusNodeIndex, NavigationType);
}
return NewFocusPath;
}
void FDesignTimeUtils::GetArrangedWidgetRelativeToParent(FWidgetPath& WidgetPath, TSharedRef<const SWidget> Widget, TSharedRef<const SWidget> Parent, FArrangedWidget& ArrangedWidget)
{
FArrangedWidget ArrangedDesigner = WidgetPath.FindArrangedWidget(Parent).Get(FArrangedWidget::NullWidget);
ArrangedWidget = WidgetPath.FindArrangedWidget(Widget).Get(FArrangedWidget::NullWidget);
// !!! WRH 2014/08/26 - This code tries to mutate an FGeometry in an unsupported way. This code should be refactored.
ArrangedWidget.Geometry.AppendTransform(FSlateLayoutTransform(Inverse(ArrangedDesigner.Geometry.AbsolutePosition)));
}
FReply FCurveColorCustomization::OnCurvePreviewDoubleClick(const FGeometry& InMyGeometry, const FPointerEvent& InMouseEvent)
{
if (InMouseEvent.GetEffectingButton() == EKeys::LeftMouseButton)
{
if (RuntimeCurve->ExternalCurve)
{
FAssetEditorManager::Get().OpenEditorForAsset(RuntimeCurve->ExternalCurve);
}
else
{
DestroyPopOutWindow();
// Determine the position of the window so that it will spawn near the mouse, but not go off the screen.
const FVector2D CursorPos = FSlateApplication::Get().GetCursorPos();
FSlateRect Anchor(CursorPos.X, CursorPos.Y, CursorPos.X, CursorPos.Y);
FVector2D AdjustedSummonLocation = FSlateApplication::Get().CalculatePopupWindowPosition( Anchor, FCurveColorCustomization::DEFAULT_WINDOW_SIZE, Orient_Horizontal );
TSharedPtr<SWindow> Window = SNew(SWindow)
.Title( FText::Format( LOCTEXT("WindowHeader", "{0} - Internal Color Curve Editor"), StructPropertyHandle->GetPropertyDisplayName()) )
.ClientSize( FCurveColorCustomization::DEFAULT_WINDOW_SIZE )
.ScreenPosition(AdjustedSummonLocation)
.AutoCenter(EAutoCenter::None)
.SupportsMaximize(false)
.SupportsMinimize(false)
.SizingRule( ESizingRule::FixedSize );
// init the mini curve editor widget
TSharedRef<SMiniCurveEditor> MiniCurveEditor =
SNew(SMiniCurveEditor)
.CurveOwner(this)
.OwnerObject(Owner)
.ParentWindow(Window);
Window->SetContent( MiniCurveEditor );
// Find the window of the parent widget
FWidgetPath WidgetPath;
FSlateApplication::Get().GeneratePathToWidgetChecked( CurveWidget.ToSharedRef(), WidgetPath );
Window = FSlateApplication::Get().AddWindowAsNativeChild( Window.ToSharedRef(), WidgetPath.GetWindow() );
//hold on to the window created for external use...
CurveEditorWindow = Window;
}
}
return FReply::Handled();
}
bool FDesignTimeUtils::GetArrangedWidget(TSharedRef<SWidget> Widget, FArrangedWidget& ArrangedWidget)
{
TSharedPtr<SWindow> WidgetWindow = FSlateApplication::Get().FindWidgetWindow(Widget);
if ( !WidgetWindow.IsValid() )
{
return false;
}
TSharedRef<SWindow> CurrentWindowRef = WidgetWindow.ToSharedRef();
FWidgetPath WidgetPath;
if ( FSlateApplication::Get().GeneratePathToWidgetUnchecked(Widget, WidgetPath) )
{
ArrangedWidget = WidgetPath.FindArrangedWidget(Widget).Get(FArrangedWidget::NullWidget);
return true;
}
return false;
}
bool FDesignTimeUtils::GetArrangedWidgetRelativeToWindow(TSharedRef<SWidget> Widget, FArrangedWidget& ArrangedWidget)
{
TSharedPtr<SWindow> WidgetWindow = FSlateApplication::Get().FindWidgetWindow(Widget);
if ( !WidgetWindow.IsValid() )
{
return false;
}
TSharedRef<SWindow> CurrentWindowRef = WidgetWindow.ToSharedRef();
FWidgetPath WidgetPath;
if ( FSlateApplication::Get().GeneratePathToWidgetUnchecked(Widget, WidgetPath) )
{
ArrangedWidget = WidgetPath.FindArrangedWidget(Widget).Get(FArrangedWidget::NullWidget);
ArrangedWidget.Geometry.AppendTransform(FSlateLayoutTransform(Inverse(CurrentWindowRef->GetPositionInScreen())));
return true;
}
return false;
}
int32 SInvalidationPanel::OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const
{
if ( GetCanCache() )
{
const bool bWasCachingNeeded = bNeedsCaching;
if ( bNeedsCaching )
{
SInvalidationPanel* MutableThis = const_cast<SInvalidationPanel*>( this );
// Always set the caching flag to false first, during the paint / tick pass we may change something
// to volatile and need to re-cache.
bNeedsCaching = false;
bIsInvalidating = true;
if ( !CachedWindowElements.IsValid() || CachedWindowElements->GetWindow() != OutDrawElements.GetWindow() )
{
CachedWindowElements = MakeShareable(new FSlateWindowElementList(OutDrawElements.GetWindow()));
}
else
{
CachedWindowElements->Reset();
}
// Reset the cached node pool index so that we effectively reset the pool.
LastUsedCachedNodeIndex = 0;
RootCacheNode = CreateCacheNode();
RootCacheNode->Initialize(Args, SharedThis(MutableThis), AllottedGeometry, MyClippingRect);
//TODO: When SWidget::Paint is called don't drag self if volatile, and we're doing a cache pass.
CachedMaxChildLayer = SCompoundWidget::OnPaint(
Args.EnableCaching(SharedThis(MutableThis), RootCacheNode, true, false),
AllottedGeometry,
MyClippingRect,
*CachedWindowElements.Get(),
LayerId,
InWidgetStyle,
bParentEnabled);
if ( bCacheRelativeTransforms )
{
CachedAbsolutePosition = AllottedGeometry.Position;
}
LastLayerId = LayerId;
LastHitTestIndex = Args.GetLastHitTestIndex();
bIsInvalidating = false;
}
// The hit test grid is actually populated during the initial cache phase, so don't bother
// recording the hit test geometry on the same frame that we regenerate the cache.
if ( bWasCachingNeeded == false )
{
RootCacheNode->RecordHittestGeometry(Args.GetGrid(), Args.GetLastHitTestIndex());
}
if ( bCacheRelativeTransforms )
{
FVector2D DeltaPosition = AllottedGeometry.Position - CachedAbsolutePosition;
const TArray<FSlateDrawElement>& CachedElements = CachedWindowElements->GetDrawElements();
const int32 CachedElementCount = CachedElements.Num();
for ( int32 Index = 0; Index < CachedElementCount; Index++ )
{
const FSlateDrawElement& LocalElement = CachedElements[Index];
FSlateDrawElement AbsElement = LocalElement;
AbsElement.SetPosition(LocalElement.GetPosition() + DeltaPosition);
AbsElement.SetClippingRect(LocalElement.GetClippingRect().OffsetBy(DeltaPosition));
OutDrawElements.AddItem(AbsElement);
}
}
else
{
OutDrawElements.AppendDrawElements(CachedWindowElements->GetDrawElements());
}
int32 OutMaxChildLayer = CachedMaxChildLayer;
// Paint the volatile elements
if ( CachedWindowElements.IsValid() )
{
OutMaxChildLayer = FMath::Max(CachedMaxChildLayer, CachedWindowElements->PaintVolatile(OutDrawElements));
}
#if !UE_BUILD_SHIPPING
if ( IsInvalidationDebuggingEnabled() )
{
// Draw a green or red border depending on if we were invalidated this frame.
{
check(Args.IsCaching() == false);
//const bool bShowOutlineAsCached = Args.IsCaching() || bWasCachingNeeded == false;
const FLinearColor DebugTint = bWasCachingNeeded ? FLinearColor::Red : FLinearColor::Green;
FGeometry ScaledOutline = AllottedGeometry.MakeChild(FVector2D(0, 0), AllottedGeometry.GetLocalSize() * AllottedGeometry.Scale, Inverse(AllottedGeometry.Scale));
FSlateDrawElement::MakeBox(
OutDrawElements,
++OutMaxChildLayer,
ScaledOutline.ToPaintGeometry(),
FCoreStyle::Get().GetBrush(TEXT("Debug.Border")),
MyClippingRect,
ESlateDrawEffect::None,
DebugTint
);
}
// Draw a yellow outline around any volatile elements.
const TArray< TSharedRef<FSlateWindowElementList::FVolatilePaint> >& VolatileElements = CachedWindowElements->GetVolatileElements();
for ( const TSharedRef<FSlateWindowElementList::FVolatilePaint>& VolatileElement : VolatileElements )
{
FSlateDrawElement::MakeBox(
OutDrawElements,
++OutMaxChildLayer,
VolatileElement->GetGeometry().ToPaintGeometry(),
FCoreStyle::Get().GetBrush(TEXT("FocusRectangle")),
MyClippingRect,
ESlateDrawEffect::None,
FLinearColor::Yellow
);
}
// Draw a white flash for any widget that invalidated us this frame.
for ( TWeakPtr<SWidget> Invalidator : InvalidatorWidgets )
{
TSharedPtr<SWidget> SafeInvalidator = Invalidator.Pin();
if ( SafeInvalidator.IsValid() )
{
FWidgetPath WidgetPath;
if ( FSlateApplication::Get().GeneratePathToWidgetUnchecked(SafeInvalidator.ToSharedRef(), WidgetPath, EVisibility::All) )
{
FArrangedWidget ArrangedWidget = WidgetPath.FindArrangedWidget(SafeInvalidator.ToSharedRef()).Get(FArrangedWidget::NullWidget);
ArrangedWidget.Geometry.AppendTransform( FSlateLayoutTransform(Inverse(Args.GetWindowToDesktopTransform())) );
FSlateDrawElement::MakeBox(
OutDrawElements,
++OutMaxChildLayer,
ArrangedWidget.Geometry.ToPaintGeometry(),
FCoreStyle::Get().GetBrush(TEXT("WhiteBrush")),
MyClippingRect,
ESlateDrawEffect::None,
FLinearColor::White.CopyWithNewOpacity(0.6f)
);
}
}
}
InvalidatorWidgets.Reset();
}
#endif
return OutMaxChildLayer;
}
else
{
return SCompoundWidget::OnPaint(Args, AllottedGeometry, MyClippingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled);
}
}
/**
* Open or close the popup
*
* @param InIsOpen If true, open the popup. Otherwise close it.
*/
void SMenuAnchor::SetIsOpen( bool InIsOpen, const bool bFocusMenu )
{
// Prevent redundant opens/closes
if ( IsOpen() != InIsOpen )
{
if ( InIsOpen )
{
if ( OnGetMenuContent.IsBound() )
{
SetMenuContent(OnGetMenuContent.Execute());
}
if ( MenuContent.IsValid() )
{
// OPEN POPUP
if ( OnMenuOpenChanged.IsBound() )
{
OnMenuOpenChanged.Execute(true);
}
// Figure out where the menu anchor is on the screen, so we can set the initial position of our pop-up window
// This can be called at any time so we use the push menu override that explicitly allows us to specify our parent
// NOTE: Careful, GeneratePathToWidget can be reentrant in that it can call visibility delegates and such
FWidgetPath MyWidgetPath;
FSlateApplication::Get().GeneratePathToWidgetUnchecked(AsShared(), MyWidgetPath);
if (MyWidgetPath.IsValid())
{
const FGeometry& MyGeometry = MyWidgetPath.Widgets.Last().Geometry;
const float LayoutScaleMultiplier = MyGeometry.GetAccumulatedLayoutTransform().GetScale();
SlatePrepass(LayoutScaleMultiplier);
// Figure out how big the content widget is so we can set the window's initial size properly
TSharedRef< SWidget > MenuContentRef = MenuContent.ToSharedRef();
MenuContentRef->SlatePrepass(LayoutScaleMultiplier);
// Combo-boxes never size down smaller than the widget that spawned them, but all
// other pop-up menus are currently auto-sized
const FVector2D DesiredContentSize = MenuContentRef->GetDesiredSize(); // @todo slate: This is ignoring any window border size!
const EMenuPlacement PlacementMode = Placement.Get();
const FVector2D NewPosition = MyGeometry.AbsolutePosition;
FVector2D NewWindowSize = DesiredContentSize;
const FVector2D SummonLocationSize = MyGeometry.Size;
FPopupTransitionEffect TransitionEffect( FPopupTransitionEffect::None );
if ( PlacementMode == MenuPlacement_ComboBox || PlacementMode == MenuPlacement_ComboBoxRight )
{
TransitionEffect = FPopupTransitionEffect( FPopupTransitionEffect::ComboButton );
NewWindowSize = FVector2D( FMath::Max( MyGeometry.Size.X, DesiredContentSize.X ), DesiredContentSize.Y );
}
else if ( PlacementMode == MenuPlacement_BelowAnchor )
{
TransitionEffect = FPopupTransitionEffect( FPopupTransitionEffect::TopMenu );
}
else if ( PlacementMode == MenuPlacement_MenuRight )
{
TransitionEffect = FPopupTransitionEffect( FPopupTransitionEffect::SubMenu );
}
MethodInUse = Method.IsSet()
? Method.GetValue()
: QueryPopupMethod(MyWidgetPath);
if (MethodInUse == EPopupMethod::CreateNewWindow)
{
// Open the pop-up
const bool bIsCollapsedByParent = false; // don't auto-close child menus when the parent gets focus
TSharedPtr<IMenu> NewMenu = FSlateApplication::Get().PushMenu(AsShared(), MyWidgetPath, MenuContentRef, NewPosition, TransitionEffect, bFocusMenu, SummonLocationSize, MethodInUse, bIsCollapsedByParent);
PopupMenuPtr = NewMenu;
check(NewMenu.IsValid() && NewMenu->GetOwnedWindow().IsValid());
NewMenu->GetOnMenuDismissed().AddSP(this, &SMenuAnchor::OnMenuClosed);
PopupWindowPtr = NewMenu->GetOwnedWindow();
}
else
{
// We are re-using the current window instead of creating a new one.
// The popup will be presented via an overlay service.
ensure(MethodInUse == EPopupMethod::UseCurrentWindow);
TSharedRef<SWindow> PopupWindow = MyWidgetPath.GetWindow();
PopupWindowPtr = PopupWindow;
if (bFocusMenu)
{
FSlateApplication::Get().ReleaseMouseCapture();
}
TSharedRef<SMenuAnchor> SharedThis = StaticCastSharedRef<SMenuAnchor>(AsShared());
const bool bIsCollapsedByParent = false; // don't auto-close child menus when the parent gets focus
TSharedPtr<IMenu> NewMenu = FSlateApplication::Get().PushHostedMenu(
SharedThis, MyWidgetPath, SharedThis, MenuContentRef, WrappedContent, TransitionEffect, bIsCollapsedByParent);
PopupMenuPtr = NewMenu;
check(NewMenu.IsValid());
check(NewMenu->GetParentWindow().ToSharedRef() == PopupWindow);
check(WrappedContent.IsValid());
Children[1]
[
WrappedContent.ToSharedRef()
];
if (bFocusMenu)
{
FSlateApplication::Get().SetKeyboardFocus(MenuContentRef, EFocusCause::SetDirectly);
}
}
}
}
}
else
{
// CLOSE POPUP
if (PopupMenuPtr.IsValid())
{
PopupMenuPtr.Pin()->Dismiss();
}
else
{
PopupWindowPtr.Reset();
MethodInUse.Reset();
}
}
}
}