FReply FKismetVariableDragDropAction::DroppedOnAction(TSharedRef<FEdGraphSchemaAction> Action)
{
if(Action->GetTypeId() == FEdGraphSchemaAction_K2Var::StaticGetTypeId())
{
FEdGraphSchemaAction_K2Var* VarAction = (FEdGraphSchemaAction_K2Var*)&Action.Get();
// Only let you drag and drop if variables are from same BP class, and not onto itself
UBlueprint* BP = UBlueprint::GetBlueprintFromClass(Cast<UClass>(VariableSource.Get()));
FName TargetVarName = VarAction->GetVariableName();
if( (BP != NULL) &&
(VariableName != TargetVarName) &&
(VariableSource == VarAction->GetVariableClass()) )
{
bool bMoved = FBlueprintEditorUtils::MoveVariableBeforeVariable(BP, VariableName, TargetVarName, true);
// If we moved successfully
if(bMoved)
{
// Change category of var to match the one we dragged on to as well
FText MovedVarCategory = FBlueprintEditorUtils::GetBlueprintVariableCategory(BP, VariableName, GetLocalVariableScope());
FText TargetVarCategory = FBlueprintEditorUtils::GetBlueprintVariableCategory(BP, TargetVarName, GetLocalVariableScope());
if(!MovedVarCategory.EqualTo(TargetVarCategory))
{
FBlueprintEditorUtils::SetBlueprintVariableCategory(BP, VariableName, GetLocalVariableScope(), TargetVarCategory, true);
}
// Update Blueprint after changes so they reflect in My Blueprint tab.
FBlueprintEditorUtils::MarkBlueprintAsStructurallyModified(BP);
}
}
return FReply::Handled();
}
return FReply::Unhandled();
}
//------------------------------------------------------------------------------
FReply SBlueprintSubPalette::OnActionDragged( const TArray< TSharedPtr<FEdGraphSchemaAction> >& InActions, const FPointerEvent& MouseEvent )
{
if( InActions.Num() > 0 && InActions[0].IsValid() )
{
TSharedPtr<FEdGraphSchemaAction> InAction = InActions[0];
auto AnalyticsDelegate = FNodeCreationAnalytic::CreateStatic(&OnNodePlacement, BlueprintEditorPtr);
auto CanNodeBePlacedDelegate = FKismetDragDropAction::FCanBeDroppedDelegate::CreateStatic(&CanPaletteItemBePlaced);
if(InAction->GetTypeId() == FEdGraphSchemaAction_K2NewNode::StaticGetTypeId())
{
return FReply::Handled().BeginDragDrop(FKismetDragDropAction::New(InAction, AnalyticsDelegate, CanNodeBePlacedDelegate));
}
else if(InAction->GetTypeId() == FEdGraphSchemaAction_K2Var::StaticGetTypeId())
{
FEdGraphSchemaAction_K2Var* VarAction = (FEdGraphSchemaAction_K2Var*)InAction.Get();
UClass* VarClass = VarAction->GetVariableClass();
if(VarClass != NULL)
{
return FReply::Handled().BeginDragDrop(FKismetVariableDragDropAction::New(VarAction->GetVariableName(), VarClass, AnalyticsDelegate));
}
}
else if(InAction->GetTypeId() == FEdGraphSchemaAction_K2Delegate::StaticGetTypeId())
{
FEdGraphSchemaAction_K2Delegate* DelegateAction = (FEdGraphSchemaAction_K2Delegate*)InAction.Get();
UClass* VarClass = DelegateAction->GetDelegateClass();
check(VarClass);
if(VarClass != NULL)
{
return FReply::Handled().BeginDragDrop(FKismetDelegateDragDropAction::New(DelegateAction->GetDelegateName(), VarClass, AnalyticsDelegate));
}
}
else if (InAction->GetTypeId() == FBlueprintDragDropMenuItem::StaticGetTypeId())
{
FBlueprintDragDropMenuItem* BlueprintAction = (FBlueprintDragDropMenuItem*)InAction.Get();
TSharedPtr<FDragDropOperation> DragDropOp = BlueprintAction->OnDragged(AnalyticsDelegate);
if (DragDropOp.IsValid())
{
return FReply::Handled().BeginDragDrop(DragDropOp.ToSharedRef());
}
else
{
return FReply::Handled().BeginDragDrop(FKismetDragDropAction::New(InAction, AnalyticsDelegate, CanNodeBePlacedDelegate));
}
}
else
{
return FReply::Handled().BeginDragDrop(FKismetDragDropAction::New(InAction, AnalyticsDelegate, CanNodeBePlacedDelegate));
}
}
return FReply::Unhandled();
}
void FKismetVariableDragDropAction::HoverTargetChanged()
{
UProperty* VariableProperty = GetVariableProperty();
if (VariableProperty == nullptr)
{
return;
}
FString VariableString = VariableName.ToString();
// Icon/text to draw on tooltip
FSlateColor IconColor = FLinearColor::White;
const FSlateBrush* StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
FText Message = LOCTEXT("InvalidDropTarget", "Invalid drop target!");
UEdGraphPin* PinUnderCursor = GetHoveredPin();
bool bCanMakeSetter = true;
bool bBadSchema = false;
bool bBadGraph = false;
UEdGraph* HoveredGraph = GetHoveredGraph();
if (HoveredGraph)
{
if (Cast<const UEdGraphSchema_K2>(HoveredGraph->GetSchema()) == NULL)
{
bBadSchema = true;
}
else if(!CanVariableBeDropped(VariableProperty, *HoveredGraph))
{
bBadGraph = true;
}
UStruct* Outer = CastChecked<UStruct>(VariableProperty->GetOuter());
FNodeConstructionParams NewNodeParams;
NewNodeParams.VariableName = VariableName;
const UBlueprint* DropOnBlueprint = FBlueprintEditorUtils::FindBlueprintForGraph(HoveredGraph);
NewNodeParams.Graph = HoveredGraph;
NewNodeParams.VariableSource = Outer;
bCanMakeSetter = CanExecuteMakeSetter(NewNodeParams, VariableProperty);
}
UEdGraphNode* VarNodeUnderCursor = Cast<UK2Node_Variable>(GetHoveredNode());
if (bBadSchema)
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = LOCTEXT("CannotCreateInThisSchema", "Cannot access variables in this type of graph");
}
else if(bBadGraph)
{
FFormatNamedArguments Args;
Args.Add(TEXT("VariableName"), FText::FromString(VariableString));
Args.Add(TEXT("Scope"), FText::FromString(HoveredGraph->GetName()));
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
if(IsFromBlueprint(FBlueprintEditorUtils::FindBlueprintForGraph(HoveredGraph)) && VariableProperty->GetOuter()->IsA(UFunction::StaticClass()))
{
Message = FText::Format( LOCTEXT("IncorrectGraphForLocalVariable_Error", "Cannot place local variable '{VariableName}' in external scope '{Scope}'"), Args);
}
else
{
Message = FText::Format( LOCTEXT("IncorrectGraphForVariable_Error", "Cannot place variable '{VariableName}' in external scope '{Scope}'"), Args);
}
}
else if (PinUnderCursor != NULL)
{
FFormatNamedArguments Args;
Args.Add(TEXT("PinUnderCursor"), FText::FromString(PinUnderCursor->PinName));
Args.Add(TEXT("VariableName"), FText::FromString(VariableString));
if(CanVariableBeDropped(VariableProperty, *PinUnderCursor->GetOwningNode()->GetGraph()))
{
const UEdGraphSchema_K2* Schema = CastChecked<const UEdGraphSchema_K2>(PinUnderCursor->GetSchema());
const bool bIsRead = PinUnderCursor->Direction == EGPD_Input;
const UBlueprint* Blueprint = FBlueprintEditorUtils::FindBlueprintForNode(PinUnderCursor->GetOwningNode());
const bool bReadOnlyProperty = FBlueprintEditorUtils::IsPropertyReadOnlyInCurrentBlueprint(Blueprint, VariableProperty);
const bool bCanWriteIfNeeded = bIsRead || !bReadOnlyProperty;
FEdGraphPinType VariablePinType;
Schema->ConvertPropertyToPinType(VariableProperty, VariablePinType);
const bool bTypeMatch = Schema->ArePinTypesCompatible(VariablePinType, PinUnderCursor->PinType);
Args.Add(TEXT("PinUnderCursor"), FText::FromString(PinUnderCursor->PinName));
if (bTypeMatch && bCanWriteIfNeeded)
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OK"));
if (bIsRead)
{
Message = FText::Format(LOCTEXT("MakeThisEqualThat_PinEqualVariableName", "Make {PinUnderCursor} = {VariableName}"), Args);
}
else
{
Message = FText::Format(LOCTEXT("MakeThisEqualThat_VariableNameEqualPin", "Make {VariableName} = {PinUnderCursor}"), Args);
}
}
else
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
if (!bCanWriteIfNeeded)
{
Message = FText::Format(LOCTEXT("ReadOnlyVar_Error", "Cannot write to read-only variable '{VariableName}'"), Args);
}
else
{
Message = FText::Format(LOCTEXT("NotCompatible_Error", "The type of '{VariableName}' is not compatible with {PinUnderCursor}"), Args);
}
}
}
else
{
Args.Add(TEXT("Scope"), FText::FromString(PinUnderCursor->GetOwningNode()->GetGraph()->GetName()));
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("IncorrectGraphForPin_Error", "Cannot place local variable '{VariableName}' in external scope '{Scope}'"), Args);
}
}
else if (VarNodeUnderCursor != NULL)
{
FFormatNamedArguments Args;
Args.Add(TEXT("VariableName"), FText::FromString(VariableString));
if(CanVariableBeDropped(VariableProperty, *VarNodeUnderCursor->GetGraph()))
{
const bool bIsRead = VarNodeUnderCursor->IsA(UK2Node_VariableGet::StaticClass());
const UBlueprint* Blueprint = FBlueprintEditorUtils::FindBlueprintForNode(VarNodeUnderCursor);
const bool bReadOnlyProperty = FBlueprintEditorUtils::IsPropertyReadOnlyInCurrentBlueprint(Blueprint, VariableProperty);
const bool bCanWriteIfNeeded = bIsRead || !bReadOnlyProperty;
if (bCanWriteIfNeeded)
{
Args.Add(TEXT("ReadOrWrite"), bIsRead ? LOCTEXT("Read", "read") : LOCTEXT("Write", "write"));
if(WillBreakLinks(VarNodeUnderCursor, VariableProperty))
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OKWarn"));
Message = FText::Format( LOCTEXT("ChangeNodeToWarnBreakLinks", "Change node to {ReadOrWrite} '{VariableName}', WARNING this will break links!"), Args);
}
else
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OK"));
Message = FText::Format( LOCTEXT("ChangeNodeTo", "Change node to {ReadOrWrite} '{VariableName}'"), Args);
}
}
else
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("ReadOnlyVar_Error", "Cannot write to read-only variable '{VariableName}'"), Args);
}
}
else
{
Args.Add(TEXT("Scope"), FText::FromString(VarNodeUnderCursor->GetGraph()->GetName()));
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("IncorrectGraphForNodeReplace_Error", "Cannot replace node with local variable '{VariableName}' in external scope '{Scope}'"), Args);
}
}
else if (!HoveredCategoryName.IsEmpty())
{
// Find Blueprint that made this class and get category of variable
FText Category;
UBlueprint* Blueprint;
// Find the Blueprint for this property
if(Cast<UFunction>(VariableSource.Get()))
{
Blueprint = UBlueprint::GetBlueprintFromClass(Cast<UClass>(VariableSource->GetOuter()));
}
else
{
Blueprint = UBlueprint::GetBlueprintFromClass(Cast<UClass>(VariableSource.Get()));
}
if(Blueprint != NULL)
{
Category = FBlueprintEditorUtils::GetBlueprintVariableCategory(Blueprint, VariableProperty->GetFName(), GetLocalVariableScope() );
}
// See if class is native
UClass* OuterClass = Cast<UClass>(VariableProperty->GetOuter());
if(OuterClass || Cast<UFunction>(VariableProperty->GetOuter()))
{
const bool bIsNativeVar = (OuterClass && OuterClass->ClassGeneratedBy == NULL);
FFormatNamedArguments Args;
Args.Add(TEXT("VariableName"), FText::FromString(VariableString));
Args.Add(TEXT("HoveredCategoryName"), HoveredCategoryName);
if (bIsNativeVar)
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("ChangingCatagoryNotThisVar", "Cannot change category for variable '{VariableName}'"), Args );
}
else if (Category.EqualTo(HoveredCategoryName))
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("ChangingCatagoryAlreadyIn", "Variable '{VariableName}' is already in category '{HoveredCategoryName}'"), Args );
}
else
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OK"));
Message = FText::Format( LOCTEXT("ChangingCatagoryOk", "Move variable '{VariableName}' to category '{HoveredCategoryName}'"), Args );
}
}
}
else if (HoveredAction.IsValid())
{
if(HoveredAction.Pin()->GetTypeId() == FEdGraphSchemaAction_K2Var::StaticGetTypeId())
{
FEdGraphSchemaAction_K2Var* VarAction = (FEdGraphSchemaAction_K2Var*)HoveredAction.Pin().Get();
FName TargetVarName = VarAction->GetVariableName();
// Needs to have a valid index to move it (this excludes variables added through other means, like timelines/components
int32 MoveVarIndex = INDEX_NONE;
int32 TargetVarIndex = INDEX_NONE;
UBlueprint* Blueprint = UBlueprint::GetBlueprintFromClass(Cast<UClass>(VariableSource.Get()));
if(Blueprint != NULL)
{
MoveVarIndex = FBlueprintEditorUtils::FindNewVariableIndex(Blueprint, VariableName);
TargetVarIndex = FBlueprintEditorUtils::FindNewVariableIndex(Blueprint, TargetVarName);
}
FFormatNamedArguments Args;
Args.Add(TEXT("VariableName"), FText::FromString(VariableString));
Args.Add(TEXT("TargetVarName"), FText::FromName(TargetVarName));
if(MoveVarIndex == INDEX_NONE)
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("MoveVarDiffClass", "Cannot reorder variable '{VariableName}'."), Args );
}
else if(TargetVarIndex == INDEX_NONE)
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("MoveVarOther", "Cannot reorder variable '{VariableName}' before '{TargetVarName}'."), Args );
}
else if(VariableName == TargetVarName)
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format( LOCTEXT("MoveVarYourself", "Cannot reorder variable '{VariableName}' before itself."), Args );
}
else
{
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OK"));
Message = FText::Format( LOCTEXT("MoveVarOK", "Reorder variable '{VariableName}' before '{TargetVarName}'"), Args );
}
}
}
else if (bAltDrag && !bCanMakeSetter)
{
FFormatNamedArguments Args;
Args.Add(TEXT("VariableName"), FText::FromString(VariableString));
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
Message = FText::Format(LOCTEXT("CannotPlaceSetter", "Variable '{VariableName}' is readonly, you cannot set this variable."), Args);
}
// Draw variable icon
else
{
StatusSymbol = FBlueprintEditor::GetVarIconAndColor(VariableSource.Get(), VariableName, IconColor);
Message = FText::FromString(VariableString);
}
SetSimpleFeedbackMessage(StatusSymbol, IconColor, Message);
}
