Display for schedule data asset timeline, view only

Source/ProjectEleriEditor/Private/NpcScheduleAssetCustomization.cpp

@@ -0,0 +1,47 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#include "NpcScheduleAssetCustomization.h"
+
+#include "DetailCategoryBuilder.h"
+#include "DetailLayoutBuilder.h"
+#include "DetailWidgetRow.h"
+
+#include "NpcScheduleTimeline.h"
+#include "ProjectEleri/Ai/NpcScheduleAsset.h"
+
+#define LOCTEXT_NAMESPACE "NpcScheduleAssetCustomization"
+
+TSharedRef<IDetailCustomization> FNpcScheduleAssetCustomization::MakeInstance() {
+	return MakeShareable(new FNpcScheduleAssetCustomization());
+}
+
+void FNpcScheduleAssetCustomization::CustomizeDetails(IDetailLayoutBuilder& DetailBuilder) {
+	// The asset being customized. The weak pointers the panel hands over are the whole reason the strip
+	// holds one of its own rather than a raw pointer: an asset can be deleted while a tab showing it is
+	// still open, and the strip has to draw an empty day rather than a dangling one.
+	TArray<TWeakObjectPtr<UObject>> Objects;
+	DetailBuilder.GetObjectsBeingCustomized(Objects);
+
+	UNpcScheduleAsset* Schedule = Objects.Num() > 0 ? Cast<UNpcScheduleAsset>(Objects[0].Get()) : nullptr;
+
+	// A category of this module's own, sorted after the one an asset's properties land in, so that the
+	// strip is drawn under every row the asset already had rather than beside them. It is created even
+	// when nothing is being customized, so that a panel left open on a deleted asset still has a strip
+	// in it saying so.
+	IDetailCategoryBuilder& TimelineCategory = DetailBuilder.EditCategory(
+		TEXT("ScheduleTimeline"),
+		LOCTEXT("TimelineCategoryLabel", "Day Timeline"),
+		ECategoryPriority::Uncommon);
+
+	// The whole row, name column and value column both, because the strip is a picture of the day and
+	// not the value of anything: it is laid out against the width of the panel it is handed, and this
+	// is the slot that hands it all of it.
+	TimelineCategory.AddCustomRow(LOCTEXT("TimelineRowLabel", "Day Timeline"))
+		.WholeRowContent()
+		[
+			SNew(SNpcScheduleTimeline)
+			.Schedule(Schedule)
+		];
+}
+
+#undef LOCTEXT_NAMESPACE