feat: lines first iteration
This commit is contained in:
299
Source/UTAD_UI/SkillTree/SkillTreeConnectionsWidget.cpp
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299
Source/UTAD_UI/SkillTree/SkillTreeConnectionsWidget.cpp
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#include "SkillTreeConnectionsWidget.h"
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#include "SkillTreeComponent.h"
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#include "Blueprint/WidgetTree.h"
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#include "Components/PanelWidget.h"
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#include "Rendering/DrawElements.h"
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#include "Blueprint/WidgetLayoutLibrary.h"
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USkillTreeConnectionsWidget::USkillTreeConnectionsWidget(
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const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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bNeedsRedraw = true;
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}
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void USkillTreeConnectionsWidget::NativeConstruct()
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{
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Super::NativeConstruct();
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// Bind to skill tree component events for automatic refresh
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if (SkillTreeComponent)
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{
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// Remove any existing bindings first to prevent double-binding
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SkillTreeComponent->OnSkillStateChanged.RemoveDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillStateChangedHandler);
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SkillTreeComponent->OnSkillSelectionChanged.RemoveDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillSelectionChangedHandler);
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SkillTreeComponent->OnSkillPurchased.RemoveDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillPurchasedHandler);
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// Now bind
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SkillTreeComponent->OnSkillStateChanged.AddDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillStateChangedHandler);
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SkillTreeComponent->OnSkillSelectionChanged.AddDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillSelectionChangedHandler);
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SkillTreeComponent->OnSkillPurchased.AddDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillPurchasedHandler);
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}
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}
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void USkillTreeConnectionsWidget::NativeDestruct()
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{
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// Unbind from events to prevent memory leaks
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if (SkillTreeComponent)
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{
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SkillTreeComponent->OnSkillStateChanged.RemoveDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillStateChangedHandler);
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SkillTreeComponent->OnSkillSelectionChanged.RemoveDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillSelectionChangedHandler);
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SkillTreeComponent->OnSkillPurchased.RemoveDynamic(
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this, &USkillTreeConnectionsWidget::OnSkillPurchasedHandler);
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}
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Super::NativeDestruct();
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}
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void USkillTreeConnectionsWidget::RefreshConnections()
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{
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bNeedsRedraw = true;
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// Force widget to repaint
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if (IsValid(this))
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{
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Invalidate(EInvalidateWidgetReason::Paint);
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}
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}
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void USkillTreeConnectionsWidget::OnSkillStateChangedHandler(FName SkillID)
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{
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RefreshConnections();
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}
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void USkillTreeConnectionsWidget::OnSkillSelectionChangedHandler(
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int32 TotalCost)
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{
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RefreshConnections();
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}
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void USkillTreeConnectionsWidget::OnSkillPurchasedHandler(FName SkillID)
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{
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RefreshConnections();
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}
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bool USkillTreeConnectionsWidget::GetSkillIDFromWidget(UUserWidget* Widget,
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FName& OutSkillID) const
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{
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if (!Widget)
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return false;
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// Try to find a property named "SkillID" on the widget
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for (TFieldIterator<FProperty> PropIt(Widget->GetClass()); PropIt; ++PropIt)
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{
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FProperty* Property = *PropIt;
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if (Property && Property->GetFName() == FName(TEXT("SkillID")))
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{
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// Check if it's a FName property
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if (FNameProperty* NameProperty =
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CastField<FNameProperty>(Property))
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{
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const void* ValuePtr =
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Property->ContainerPtrToValuePtr<void>(Widget);
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OutSkillID = NameProperty->GetPropertyValue(ValuePtr);
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return true;
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}
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}
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}
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return false;
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}
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void USkillTreeConnectionsWidget::FindWidgetsOfClass(
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UWidget* Root, TSubclassOf<UUserWidget> WidgetClass,
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TArray<UUserWidget*>& OutWidgets) const
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{
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if (!Root || !WidgetClass)
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return;
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// Check if this widget is a UserWidget of the desired class
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if (UUserWidget* UserWidget = Cast<UUserWidget>(Root))
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{
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if (UserWidget->IsA(WidgetClass))
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{
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OutWidgets.Add(UserWidget);
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}
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}
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// If this is a panel widget, recursively search its children
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if (UPanelWidget* PanelWidget = Cast<UPanelWidget>(Root))
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{
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for (int32 i = 0; i < PanelWidget->GetChildrenCount(); ++i)
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{
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UWidget* Child = PanelWidget->GetChildAt(i);
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FindWidgetsOfClass(Child, WidgetClass, OutWidgets);
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}
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}
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// If this is a UserWidget, search its widget tree
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if (UUserWidget* UserWidget = Cast<UUserWidget>(Root))
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{
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if (UserWidget->WidgetTree)
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{
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TArray<UWidget*> AllWidgets;
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UserWidget->WidgetTree->GetAllWidgets(AllWidgets);
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for (UWidget* Widget : AllWidgets)
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{
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if (Widget != Root) // Avoid infinite recursion
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{
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FindWidgetsOfClass(Widget, WidgetClass, OutWidgets);
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}
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}
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}
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}
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}
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void USkillTreeConnectionsWidget::BuildNodeInfoList(
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TArray<FSkillNodeInfo>& OutNodeInfo) const
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{
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OutNodeInfo.Empty();
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if (!SkillTreeComponent || !SkillNodeWidgetClass)
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return;
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// Determine root widget to search from
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UWidget* RootWidget = SkillTreeWidget;
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if (!RootWidget)
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{
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// If no parent widget is set, try to get the outer widget
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RootWidget = Cast<UWidget>(GetOuter());
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if (!RootWidget)
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{
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// As last resort, try to get root widget from widget tree
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if (WidgetTree)
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{
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RootWidget = WidgetTree->RootWidget;
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}
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}
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}
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if (!RootWidget)
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{
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UE_LOG(
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LogTemp, Error,
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TEXT(
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"SkillTreeConnectionsWidget: No valid root widget found to search for skill nodes"));
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return;
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}
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// Find all skill node widgets recursively
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TArray<UUserWidget*> SkillNodeWidgets;
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FindWidgetsOfClass(RootWidget, SkillNodeWidgetClass, SkillNodeWidgets);
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// Build info for each skill node
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for (UUserWidget* SkillNodeWidget : SkillNodeWidgets)
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{
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if (!SkillNodeWidget)
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continue;
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// Try to get the SkillID from the widget
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FName SkillID;
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if (!GetSkillIDFromWidget(SkillNodeWidget, SkillID))
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continue;
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// Get the skill node data from the component
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FSkillNodeRuntime NodeData;
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if (!SkillTreeComponent->GetSkillNodeData(SkillID, NodeData))
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continue;
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// Get the widget's geometry to determine its position
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const FGeometry& Geometry = SkillNodeWidget->GetCachedGeometry();
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FVector2D LocalSize = Geometry.GetLocalSize();
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FVector2D AbsolutePosition = Geometry.GetAbsolutePosition();
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// Calculate center position (in absolute/screen space)
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FVector2D CenterPosition = AbsolutePosition + (LocalSize * 0.5f);
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// Build the info struct
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FSkillNodeInfo NodeInfo;
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NodeInfo.SkillID = SkillID;
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NodeInfo.Position = CenterPosition;
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NodeInfo.State = NodeData.CurrentState;
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NodeInfo.Prerequisites = NodeData.NodeData.Prerequisites;
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OutNodeInfo.Add(NodeInfo);
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}
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}
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FLinearColor
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USkillTreeConnectionsWidget::GetLineColorForState(ESkillNodeState State) const
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{
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switch (State)
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{
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case ESkillNodeState::Locked:
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return LockedColor;
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case ESkillNodeState::Available:
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return AvailableColor;
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case ESkillNodeState::Selected:
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return SelectedColor;
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case ESkillNodeState::Purchased:
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return PurchasedColor;
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default:
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return LockedColor;
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}
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}
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int32 USkillTreeConnectionsWidget::NativePaint(
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const FPaintArgs& Args, const FGeometry& AllottedGeometry,
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const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements,
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int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const
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{
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int32 MaxLayerId = Super::NativePaint(Args, AllottedGeometry, MyCullingRect,
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OutDrawElements, LayerId,
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InWidgetStyle, bParentEnabled);
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if (!SkillTreeComponent || !SkillNodeWidgetClass)
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return MaxLayerId;
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// Build node information
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TArray<FSkillNodeInfo> NodeInfoList;
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BuildNodeInfoList(NodeInfoList);
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// Get this widget's absolute position to convert coordinates
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FVector2D ConnectionsWidgetAbsolutePosition = AllottedGeometry.GetAbsolutePosition();
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// Draw lines for each node's prerequisites
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for (const FSkillNodeInfo& DependentNode : NodeInfoList)
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{
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// Get the color for this node's connections
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FLinearColor LineColor = GetLineColorForState(DependentNode.State);
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// Draw lines to each prerequisite
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for (const FName& PrerequisiteID : DependentNode.Prerequisites)
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{
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// Find the prerequisite node in our list
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const FSkillNodeInfo* PrereqNode = NodeInfoList.FindByPredicate(
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[&PrerequisiteID](const FSkillNodeInfo& Info)
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{ return Info.SkillID == PrerequisiteID; });
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if (!PrereqNode)
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continue;
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// Convert absolute positions to local coordinates relative to this widget
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FVector2D PrereqLocalPos = PrereqNode->Position - ConnectionsWidgetAbsolutePosition;
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FVector2D DependentLocalPos = DependentNode.Position - ConnectionsWidgetAbsolutePosition;
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// Draw line from prerequisite to dependent
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TArray<FVector2D> LinePoints;
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LinePoints.Add(PrereqLocalPos);
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LinePoints.Add(DependentLocalPos);
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FSlateDrawElement::MakeLines(OutDrawElements, MaxLayerId + 1,
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AllottedGeometry.ToPaintGeometry(),
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LinePoints, ESlateDrawEffect::None,
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LineColor,
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true, // bAntialias
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LineThickness);
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}
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}
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return MaxLayerId + 1;
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}
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106
Source/UTAD_UI/SkillTree/SkillTreeConnectionsWidget.h
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106
Source/UTAD_UI/SkillTree/SkillTreeConnectionsWidget.h
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@@ -0,0 +1,106 @@
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#pragma once
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#include "CoreMinimal.h"
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#include "Blueprint/UserWidget.h"
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#include "SkillTreeTypes.h"
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#include "SkillTreeConnectionsWidget.generated.h"
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class USkillTreeComponent;
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class UUserWidget;
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class UWidget;
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/**
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* Widget that automatically draws connection lines between skill tree nodes
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* Place this widget in your skill tree UI and it will handle all line rendering
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*/
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UCLASS()
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class UTAD_UI_API USkillTreeConnectionsWidget : public UUserWidget
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{
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GENERATED_BODY()
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public:
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USkillTreeConnectionsWidget(const FObjectInitializer& ObjectInitializer);
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// Parent widget to search for skill nodes (can be the skill tree widget
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// itself) If not set, will search from the outer widget
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UPROPERTY(EditAnywhere, BlueprintReadWrite,
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Category = "Skill Tree Connections")
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UUserWidget* SkillTreeWidget;
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// Reference to the skill tree component (set this in Blueprint)
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UPROPERTY(EditAnywhere, BlueprintReadWrite,
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Category = "Skill Tree Connections")
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USkillTreeComponent* SkillTreeComponent;
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// Widget class for skill nodes
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UPROPERTY(EditAnywhere, BlueprintReadWrite,
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Category = "Skill Tree Connections")
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TSubclassOf<UUserWidget> SkillNodeWidgetClass;
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// Line thickness in pixels
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Line Appearance",
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meta = (ClampMin = "0.5", ClampMax = "10.0"))
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float LineThickness = 2.0f;
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// Colors for different states
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Line Colors")
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FLinearColor LockedColor = FLinearColor(0.3f, 0.3f, 0.3f, 1.0f);
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Line Colors")
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FLinearColor AvailableColor = FLinearColor(1.0f, 1.0f, 1.0f, 1.0f);
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Line Colors")
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FLinearColor SelectedColor = FLinearColor(1.0f, 0.84f, 0.0f, 1.0f);
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Line Colors")
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FLinearColor PurchasedColor = FLinearColor(0.0f, 1.0f, 0.0f, 1.0f);
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// Call this to refresh the lines (useful when skill states change)
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UFUNCTION(BlueprintCallable, Category = "Skill Tree Connections")
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void RefreshConnections();
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protected:
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virtual int32 NativePaint(const FPaintArgs& Args,
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const FGeometry& AllottedGeometry,
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const FSlateRect& MyCullingRect,
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FSlateWindowElementList& OutDrawElements,
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int32 LayerId, const FWidgetStyle& InWidgetStyle,
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bool bParentEnabled) const override;
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virtual void NativeConstruct() override;
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virtual void NativeDestruct() override;
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private:
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// Event handlers for skill tree component events
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UFUNCTION()
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void OnSkillStateChangedHandler(FName SkillID);
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UFUNCTION()
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void OnSkillSelectionChangedHandler(int32 TotalCost);
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UFUNCTION()
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void OnSkillPurchasedHandler(FName SkillID);
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// Helper struct to store node information for drawing
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struct FSkillNodeInfo
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{
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FName SkillID;
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FVector2D Position;
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ESkillNodeState State;
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TArray<FName> Prerequisites;
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};
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// Build the list of nodes and their info
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void BuildNodeInfoList(TArray<FSkillNodeInfo>& OutNodeInfo) const;
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// Recursively find all widgets of a specific class in the widget hierarchy
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void FindWidgetsOfClass(UWidget* Root, TSubclassOf<UUserWidget> WidgetClass,
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TArray<UUserWidget*>& OutWidgets) const;
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// Get the color for a line based on the dependent node's state
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FLinearColor GetLineColorForState(ESkillNodeState State) const;
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// Get SkillID from a skill node widget (looks for "SkillID" property)
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bool GetSkillIDFromWidget(UUserWidget* Widget, FName& OutSkillID) const;
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// Cache for forcing redraws
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mutable bool bNeedsRedraw = true;
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};
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Reference in New Issue
Block a user