UEdGraphNode* FEdGraphSchemaAction_K2AddCallOnVariable::PerformAction(class UEdGraph* ParentGraph, UEdGraphPin* FromPin, const FVector2D Location, bool bSelectNewNode/* = true*/)
{
const UEdGraphSchema_K2* K2Schema = GetDefault<UEdGraphSchema_K2>();
// Snap the node placement location to the grid, ensures calculations later match up better
FVector2D LocalLocation;
LocalLocation.X = FMath::GridSnap( Location.X, SNAP_GRID );
LocalLocation.Y = FMath::GridSnap( Location.Y, SNAP_GRID );
// First use the base functionality to spawn the 'call function' node
FVector2D TempLocation = LocalLocation;
UEdGraphNode* CallNode = FEdGraphSchemaAction_K2NewNode::PerformAction(ParentGraph, FromPin, TempLocation, bSelectNewNode);
// this is the guesstimate of the function node's height, snapped to grid units
const float FunctionNodeHeight = FMath::GridSnap( TempLocation.Y - LocalLocation.Y, SNAP_GRID );
// this is roughly the middle of the function node height
const float FunctionNodeMidY = LocalLocation.Y + FunctionNodeHeight * 0.5f;
// this is the offset up from the mid point at which we start placing nodes
const float StartYOffset = -NodeLiteralHeight * 0.5f;
// The Y location we start placing nodes from
const float ReferencedNodesPlacementYLocation = FunctionNodeMidY + StartYOffset;
// Now we need to create the variable literal to wire up
if(VariableName != NAME_None)
{
UK2Node_VariableGet* GetVarNode = NewObject<UK2Node_VariableGet>(ParentGraph);
ParentGraph->AddNode(GetVarNode, false, bSelectNewNode);
GetVarNode->SetFlags(RF_Transactional);
GetVarNode->VariableReference.SetSelfMember(VariableName);
GetVarNode->AllocateDefaultPins();
GetVarNode->NodePosX = LocalLocation.X - FunctionNodeLiteralReferencesXOffset;
GetVarNode->NodePosY = ReferencedNodesPlacementYLocation;
GetVarNode->SnapToGrid(SNAP_GRID);
// Connect the literal out to the self of the call
UEdGraphPin* LiteralOutput = GetVarNode->GetValuePin();
UEdGraphPin* CallSelfInput = CallNode->FindPin(K2Schema->PN_Self);
if(LiteralOutput != NULL && CallSelfInput != NULL)
{
LiteralOutput->MakeLinkTo(CallSelfInput);
}
}
return CallNode;
}
void UK2Node_Timeline::ExpandForPin(UEdGraphPin* TimelinePin, const FName PropertyName, FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
if (TimelinePin && TimelinePin->LinkedTo.Num() > 0)
{
UK2Node_VariableGet* GetVarNode = CompilerContext.SpawnIntermediateNode<UK2Node_VariableGet>(this, SourceGraph);
GetVarNode->VariableReference.SetSelfMember(PropertyName);
GetVarNode->AllocateDefaultPins();
UEdGraphPin* ValuePin = GetVarNode->GetValuePin();
if (NULL != ValuePin)
{
CompilerContext.MovePinLinksToIntermediate(*TimelinePin, *ValuePin);
}
else
{
CompilerContext.MessageLog.Error(*LOCTEXT("ExpandForPin_Error", "ExpandForPin error, no property found for @@").ToString(), TimelinePin);
}
}
}
void UK2Node_VariableGet::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
Super::ExpandNode(CompilerContext, SourceGraph);
// Do not attempt to expand the node when not a pure get nor when there is no property. Normal compilation error detection will detect the missing property.
if (!bIsPureGet && GetPropertyForVariable() != nullptr)
{
const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
UEdGraphPin* ValuePin = GetValuePin();
// Impure Get nodes convert into three nodes:
// 1. A pure Get node
// 2. An IsValid node
// 3. A Branch node (only impure part
// Create the impure Get node
UK2Node_VariableGet* VariableGetNode = CompilerContext.SpawnIntermediateNode<UK2Node_VariableGet>(this, SourceGraph);
VariableGetNode->VariableReference = VariableReference;
VariableGetNode->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(VariableGetNode, this);
// Move pin links from Get node we are expanding, to the new pure one we've created
CompilerContext.MovePinLinksToIntermediate(*ValuePin, *VariableGetNode->GetValuePin());
if (!VariableReference.IsLocalScope())
{
CompilerContext.MovePinLinksToIntermediate(*FindPin(Schema->PN_Self), *VariableGetNode->FindPin(Schema->PN_Self));
}
// Create the IsValid node
UK2Node_CallFunction* IsValidFunction = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
// Based on if the type is an "Object" or a "Class" changes which function to use
if (ValuePin->PinType.PinCategory == UObject::StaticClass()->GetName())
{
IsValidFunction->SetFromFunction(UKismetSystemLibrary::StaticClass()->FindFunctionByName(GET_MEMBER_NAME_CHECKED(UKismetSystemLibrary, IsValid)));
}
else if (ValuePin->PinType.PinCategory == UClass::StaticClass()->GetName())
{
IsValidFunction->SetFromFunction(UKismetSystemLibrary::StaticClass()->FindFunctionByName(GET_MEMBER_NAME_CHECKED(UKismetSystemLibrary, IsValidClass)));
}
IsValidFunction->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(IsValidFunction, this);
// Connect the value pin from the new Get node to the IsValid
UEdGraphPin* ObjectPin = IsValidFunction->Pins[1];
check(ObjectPin->Direction == EGPD_Input);
ObjectPin->MakeLinkTo(VariableGetNode->GetValuePin());
// Create the Branch node
UK2Node_IfThenElse* BranchNode = CompilerContext.SpawnIntermediateNode<UK2Node_IfThenElse>(this, SourceGraph);
BranchNode->AllocateDefaultPins();
CompilerContext.MessageLog.NotifyIntermediateObjectCreation(BranchNode, this);
// Connect the bool output pin from IsValid node to the Branch node
UEdGraphPin* BoolPin = IsValidFunction->Pins[2];
check(BoolPin->Direction == EGPD_Output);
BoolPin->MakeLinkTo(BranchNode->GetConditionPin());
// Connect the Branch node to the input of the impure Get node
CompilerContext.MovePinLinksToIntermediate(*GetExecPin(), *BranchNode->GetExecPin());
// Move the two Branch pins to the Branch node
CompilerContext.MovePinLinksToIntermediate(*FindPin(Schema->PN_Then), *BranchNode->FindPin(Schema->PN_Then));
CompilerContext.MovePinLinksToIntermediate(*FindPin(Schema->PN_Else), *BranchNode->FindPin(Schema->PN_Else));
BreakAllNodeLinks();
}
}
void UK2Node_CallFunctionOnMember::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
{
// This skips UK2Node_CallFunction::ExpandNode. Instead it spawns a new CallFunction node and does hookup that this is interested in,
// and then that CallFunction node will get its own Expansion to handle the parent portions
UK2Node::ExpandNode(CompilerContext, SourceGraph);
if (CompilerContext.bIsFullCompile)
{
const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
UFunction* Function = GetTargetFunction();
// Create real 'call function' node.
UK2Node_CallFunction* CallFuncNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
CallFuncNode->SetFromFunction(Function);
CallFuncNode->AllocateDefaultPins();
UEdGraphPin* CallFuncSelfPin = Schema->FindSelfPin(*CallFuncNode, EGPD_Input);
// Now because you can wire multiple variables to a self pin, need to iterate over each one and create a 'get var' node for each
UEdGraphPin* SelfPin = Schema->FindSelfPin(*this, EGPD_Input);
if(SelfPin != NULL)
{
if (SelfPin->LinkedTo.Num() == 0)
{
UK2Node_VariableGet* GetVarNode = CompilerContext.SpawnIntermediateNode<UK2Node_VariableGet>(this, SourceGraph);
GetVarNode->VariableReference.SetSelfMember(MemberVariableToCallOn.GetMemberName());
GetVarNode->AllocateDefaultPins();
if (UEdGraphPin* ValuePin = GetVarNode->GetValuePin())
{
ValuePin->MakeLinkTo(CallFuncSelfPin);
}
}
else
{
for (int32 TargetIdx = 0; TargetIdx < SelfPin->LinkedTo.Num(); TargetIdx++)
{
UEdGraphPin* SourcePin = SelfPin->LinkedTo[TargetIdx];
if (SourcePin != NULL)
{
// Create 'get var' node to get the member
UK2Node_VariableGet* GetVarNode = CompilerContext.SpawnIntermediateNode<UK2Node_VariableGet>(this, SourceGraph);
GetVarNode->VariableReference = MemberVariableToCallOn;
GetVarNode->AllocateDefaultPins();
UEdGraphPin* VarNodeSelfPin = Schema->FindSelfPin(*GetVarNode, EGPD_Input);
if (VarNodeSelfPin != NULL)
{
VarNodeSelfPin->MakeLinkTo(SourcePin);
UEdGraphPin* ValuePin = GetVarNode->GetValuePin();
ValuePin->MakeLinkTo(CallFuncSelfPin);
}
else
{
// Failed to find the member to call on for this expansion, so warn about it
CompilerContext.MessageLog.Warning(*LOCTEXT("CallFunctionOnInvalidMember_Warning", "Function node @@ called on invalid target member.").ToString(), this);
}
}
}
}
}
// Now move the rest of the connections (including exec connections...)
for(int32 SrcPinIdx=0; SrcPinIdx<Pins.Num(); SrcPinIdx++)
{
UEdGraphPin* SrcPin = Pins[SrcPinIdx];
if(SrcPin != NULL && SrcPin != SelfPin) // check its not the self pin
{
UEdGraphPin* DestPin = CallFuncNode->FindPin(SrcPin->PinName);
if(DestPin != NULL)
{
CompilerContext.MovePinLinksToIntermediate(*SrcPin, *DestPin); // Source node is assumed to be owner...
}
}
}
// Finally, break any remaining links on the 'call func on member' node
BreakAllNodeLinks();
}
}