FReply STransformHandle::OnMouseButtonDown(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
if ( MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton )
{
Action = ComputeActionAtLocation(MyGeometry, MouseEvent);
FWidgetReference SelectedWidget = Designer->GetSelectedWidget();
UWidget* Preview = SelectedWidget.GetPreview();
UWidget* Template = SelectedWidget.GetTemplate();
if ( UCanvasPanelSlot* Slot = Cast<UCanvasPanelSlot>(Preview->Slot) )
{
StartingOffsets = Slot->GetOffsets();
}
MouseDownPosition = MouseEvent.GetScreenSpacePosition();
ScopedTransaction = new FScopedTransaction(LOCTEXT("ResizeWidget", "Resize Widget"));
Template->Modify();
return FReply::Handled().CaptureMouse(SharedThis(this));
}
return FReply::Unhandled();
}
EVisibility STransformHandle::GetHandleVisibility() const
{
ETransformMode::Type TransformMode = Designer->GetTransformMode();
// Only show the handles for visible elements in the designer.
FWidgetReference SelectedWidget = Designer->GetSelectedWidget();
if ( SelectedWidget.IsValid() )
{
if ( !SelectedWidget.GetTemplate()->bHiddenInDesigner )
{
switch ( TransformMode )
{
case ETransformMode::Layout:
{
if ( UPanelSlot* TemplateSlot = SelectedWidget.GetTemplate()->Slot )
{
if ( CanResize(TemplateSlot, DragDirection) )
{
return EVisibility::Visible;
}
}
break;
}
case ETransformMode::Render:
return EVisibility::Visible;
}
}
}
return EVisibility::Collapsed;
}
FReply STransformHandle::OnMouseMove(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
{
if ( Action != ETransformAction::None )
{
FWidgetReference SelectedWidget = Designer->GetSelectedWidget();
UWidget* Template = SelectedWidget.GetTemplate();
UWidget* Preview = SelectedWidget.GetPreview();
{
FVector2D Delta = MouseEvent.GetScreenSpacePosition() - MouseDownPosition;
FVector2D TranslateAmount = Delta * ( 1.0f / Designer->GetPreviewScale() );
Resize(Cast<UCanvasPanelSlot>(Preview->Slot), DragDirection, TranslateAmount);
Resize(Cast<UCanvasPanelSlot>(Template->Slot), DragDirection, TranslateAmount);
}
ETransformMode::Type TransformMode = Designer->GetTransformMode();
if ( TransformMode == ETransformMode::Render )
{
FWidgetTransform PreviewRenderTransform = Preview->RenderTransform;
static const FName RenderTransformName(TEXT("RenderTransform"));
FObjectEditorUtils::SetPropertyValue<UWidget, FWidgetTransform>(Preview, RenderTransformName, PreviewRenderTransform);
FObjectEditorUtils::SetPropertyValue<UWidget, FWidgetTransform>(Template, RenderTransformName, PreviewRenderTransform);
}
}
return FReply::Unhandled();
}
// Callback for clicking a menu entry for a navigations rule.
void FWidgetNavigationCustomization::HandleNavMenuEntryClicked(TWeakPtr<IPropertyHandle> PropertyHandle, EUINavigation Nav, EUINavigationRule Rule)
{
TArray<UObject*> OuterObjects;
TSharedPtr<IPropertyHandle> PropertyHandlePtr = PropertyHandle.Pin();
PropertyHandlePtr->GetOuterObjects(OuterObjects);
const FScopedTransaction Transaction(LOCTEXT("InitializeNavigation", "Edit Widget Navigation"));
for (UObject* OuterObject : OuterObjects)
{
if (UWidget* Widget = Cast<UWidget>(OuterObject))
{
FWidgetReference WidgetReference = Editor.Pin()->GetReferenceFromPreview(Widget);
SetNav(WidgetReference.GetPreview(), Nav, Rule, TOptional<FName>());
SetNav(WidgetReference.GetTemplate(), Nav, Rule, TOptional<FName>());
}
}
}
bool FWidgetBlueprintEditor::CanPasteWidgets()
{
TSet<FWidgetReference> Widgets = GetSelectedWidgets();
if ( Widgets.Num() == 1 )
{
FWidgetReference Target = *Widgets.CreateIterator();
const bool bIsPanel = Cast<UPanelWidget>(Target.GetTemplate()) != nullptr;
return bIsPanel;
}
else if ( Widgets.Num() == 0 )
{
if ( GetWidgetBlueprintObj()->WidgetTree->RootWidget == nullptr )
{
return true;
}
}
return false;
}
void FWidgetNavigationCustomization::OnCommitExplictWidgetText(const FText& ItemFText, ETextCommit::Type CommitInfo, TWeakPtr<IPropertyHandle> PropertyHandle, EUINavigation Nav)
{
TArray<UObject*> OuterObjects;
TSharedPtr<IPropertyHandle> PropertyHandlePtr = PropertyHandle.Pin();
PropertyHandlePtr->GetOuterObjects(OuterObjects);
const FScopedTransaction Transaction(LOCTEXT("InitializeNavigation", "Edit Widget Navigation"));
FName GotoWidgetName = FName(*ItemFText.ToString());
for ( UObject* OuterObject : OuterObjects )
{
if ( UWidget* Widget = Cast<UWidget>(OuterObject) )
{
FWidgetReference WidgetReference = Editor.Pin()->GetReferenceFromPreview(Widget);
SetNav(WidgetReference.GetPreview(), Nav, TOptional<EUINavigationRule>(), GotoWidgetName);
SetNav(WidgetReference.GetTemplate(), Nav, TOptional<EUINavigationRule>(), GotoWidgetName);
}
}
}
