//------------------------------------------------------------------------------
void FKismetMacroDragDropAction::HoverTargetChanged()
{
UEdGraph* TheHoveredGraph = GetHoveredGraph();
FText CannotDropReason = FText::GetEmpty();
// it should be obvious that we can't drop on anything but a graph, so no need to point that out
if ((TheHoveredGraph == NULL) || !CanBeDroppedDelegate.IsBound() || CanBeDroppedDelegate.Execute(ActionNode, TheHoveredGraph, CannotDropReason))
{
FSlateBrush const* DropPreventedIcon = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.NewNode"));
SetSimpleFeedbackMessage(DropPreventedIcon, FLinearColor::White, FText::FromName(MacroName));
}
else
{
FSlateBrush const* DropPreventedIcon = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
SetSimpleFeedbackMessage(DropPreventedIcon, FLinearColor::White, CannotDropReason);
}
}
void FGraphSchemaActionDragDropAction::HoverTargetChanged()
{
if(ActionNode.IsValid())
{
const FSlateBrush* StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.NewNode"));
//Create feedback message with the function name.
SetSimpleFeedbackMessage(StatusSymbol, FLinearColor::White, ActionNode->GetMenuDescription());
}
}
//------------------------------------------------------------------------------
void FKismetDragDropAction::HoverTargetChanged()
{
UEdGraph* TheHoveredGraph = GetHoveredGraph();
FText CannotDropReason = FText::GetEmpty();
if (ActionWillShowExistingNode())
{
FSlateBrush const* ShowsExistingIcon = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.ShowNode"));
FText DragingText = FText::Format(LOCTEXT("ShowExistingNode", "Show '{0}'"), ActionNode->GetMenuDescription());
SetSimpleFeedbackMessage(ShowsExistingIcon, FLinearColor::White, DragingText);
}
// it should be obvious that we can't drop on anything but a graph, so no need to point that out
else if ((TheHoveredGraph == nullptr) || !CanBeDroppedDelegate.IsBound() || CanBeDroppedDelegate.Execute(ActionNode, TheHoveredGraph, CannotDropReason))
{
FGraphSchemaActionDragDropAction::HoverTargetChanged();
}
else
{
FSlateBrush const* DropPreventedIcon = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
SetSimpleFeedbackMessage(DropPreventedIcon, FLinearColor::White, CannotDropReason);
}
}
void FDragConnection::HoverTargetChanged()
{
TArray<FPinConnectionResponse> UniqueMessages;
if (UEdGraphPin* TargetPinObj = GetHoveredPin())
{
TArray<UEdGraphPin*> ValidSourcePins;
ValidateGraphPinList(/*out*/ ValidSourcePins);
// Check the schema for connection responses
for (UEdGraphPin* StartingPinObj : ValidSourcePins)
{
if (TargetPinObj != StartingPinObj)
{
// The Graph object in which the pins reside.
UEdGraph* GraphObj = StartingPinObj->GetOwningNode()->GetGraph();
// Determine what the schema thinks about the wiring action
const FPinConnectionResponse Response = GraphObj->GetSchema()->CanCreateConnection( StartingPinObj, TargetPinObj );
if (Response.Response == ECanCreateConnectionResponse::CONNECT_RESPONSE_DISALLOW)
{
TSharedPtr<SGraphNode> NodeWidget = TargetPinObj->GetOwningNode()->NodeWidget.Pin();
if (NodeWidget.IsValid())
{
NodeWidget->NotifyDisallowedPinConnection(StartingPinObj, TargetPinObj);
}
}
UniqueMessages.AddUnique(Response);
}
}
}
else if(UEdGraphNode* TargetNodeObj = GetHoveredNode())
{
TArray<UEdGraphPin*> ValidSourcePins;
ValidateGraphPinList(/*out*/ ValidSourcePins);
// Check the schema for connection responses
for (UEdGraphPin* StartingPinObj : ValidSourcePins)
{
FPinConnectionResponse Response;
FText ResponseText;
if (StartingPinObj->GetOwningNode() != TargetNodeObj && StartingPinObj->GetSchema()->SupportsDropPinOnNode(TargetNodeObj, StartingPinObj->PinType, StartingPinObj->Direction, ResponseText))
{
Response.Response = ECanCreateConnectionResponse::CONNECT_RESPONSE_MAKE;
}
else
{
Response.Response = ECanCreateConnectionResponse::CONNECT_RESPONSE_DISALLOW;
}
// Do not display an error if there is no message
if (!ResponseText.IsEmpty())
{
Response.Message = ResponseText;
UniqueMessages.AddUnique(Response);
}
}
}
// Let the user know the status of dropping now
if (UniqueMessages.Num() == 0)
{
// Display the place a new node icon, we're not over a valid pin
SetSimpleFeedbackMessage(
FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.NewNode")),
FLinearColor::White,
NSLOCTEXT("GraphEditor.Feedback", "PlaceNewNode", "Place a new node."));
}
else
{
// Take the unique responses and create visual feedback for it
TSharedRef<SVerticalBox> FeedbackBox = SNew(SVerticalBox);
for (auto ResponseIt = UniqueMessages.CreateConstIterator(); ResponseIt; ++ResponseIt)
{
// Determine the icon
const FSlateBrush* StatusSymbol = NULL;
switch (ResponseIt->Response)
{
case CONNECT_RESPONSE_MAKE:
case CONNECT_RESPONSE_BREAK_OTHERS_A:
case CONNECT_RESPONSE_BREAK_OTHERS_B:
case CONNECT_RESPONSE_BREAK_OTHERS_AB:
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.OK"));
break;
case CONNECT_RESPONSE_MAKE_WITH_CONVERSION_NODE:
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.ViaCast"));
break;
case CONNECT_RESPONSE_DISALLOW:
default:
StatusSymbol = FEditorStyle::GetBrush(TEXT("Graph.ConnectorFeedback.Error"));
break;
}
// Add a new message row
FeedbackBox->AddSlot()
.AutoHeight()
[
SNew(SHorizontalBox)
+SHorizontalBox::Slot()
.AutoWidth()
.Padding(3.0f)
[
SNew(SImage) .Image( StatusSymbol )
]
+SHorizontalBox::Slot()
.AutoWidth()
.VAlign(VAlign_Center)
[
SNew(STextBlock) .Text( ResponseIt->Message )
]
];
}
SetFeedbackMessage(FeedbackBox);
}
}
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);
}
