eragon (Eragon-Brisingr/ImGui_WS) | MoltPulse

eragon (Eragon-Brisingr/ImGui_WS) | MoltPulse

static UnrealImGui::FImGuiTextureHandle TextureHandle = []
{
    UTexture2D* Texture2D = LoadObject<UTexture2D>(nullptr, TEXT("/Engine/EditorResources/S_Actor"));
    // step 1
    const UnrealImGui::FImGuiTextureHandle Handle{ Texture2D };
    // step 2
    UnrealImGui::UpdateTextureData(Handle, UnrealImGui::ETextureFormat::RGB8, Texture2D);
    return Handle;
}();
// step 3
ImGui::Image(TextureHandle, ImVec2{ 256.f, 256.f });

UShootWeaponBulletDrawer::UShootWeaponBulletDrawer()
{
	// Declare the Actor types supported by the Drawer
	DrawActor = AShootWeaponBullet::StaticClass();
	// Drawn solid radius
	Radius = 10.f;
	// Painted color
	Color = FLinearColor::Red;
}

void UShootWeaponBulletDrawer::DrawImGuiDebuggerExtendInfo(const AActor* Actor, const FImGuiWorldViewportContext& DebuggerContext) const
{
	const AShootWeaponBullet* Bullet = CastChecked<AShootWeaponBullet>(Actor);
	const FVector EndLocation = Bullet->GetActorLocation();
	const FVector StartLocation = EndLocation - Actor->GetVelocity() * DebuggerContext.DeltaSeconds;
	DebuggerContext.DrawLine(FVector2D{ StartLocation }, FVector2D{ EndLocation }, Color);
}

// declare switch
UPROPERTY(Config)
uint8 bExampleToggle : 1;

// Add the menu option of whether to enable the switch in the implementation
if (ImGui::BeginMenu("Example Menu"))
{
	{
		bool Value = bExampleToggle;
		if (ImGui::Checkbox("Example Toggle", &Value))
		{
			bShowGlobalLifeTime = Value;
			DebuggerContext.MarkConfigDirty();
		}
	}
	ImGui::EndMenu();
}

// The switch is judged in the logic, and the debug information is drawn when it is turned on.

UCLASS()
class UImGuiWorldDebuggerDefaultLayout : public UImGuiWorldDebuggerLayoutBase
{
	GENERATED_BODY()
public:
	// Declare the DockId as the configuration when the panel registers the Dock
	enum EDockId
	{
		Viewport,
		Outliner,
		Details,
		Utils,
	};
	UImGuiWorldDebuggerDefaultLayout();
	void LoadDefaultLayout(UObject* Owner, const UUnrealImGuiPanelBuilder& LayoutBuilder) override;
};

UImGuiWorldDebuggerDefaultLayout::UImGuiWorldDebuggerDefaultLayout()
{
	// Set layout name
	LayoutName = TEXT("Default");
}

void UImGuiWorldDebuggerDefaultLayout::LoadDefaultLayout(UObject* Owner, const UUnrealImGuiPanelBuilder& LayoutBuilder)
{
	const ImGuiID DockId = ImGui::DockBuilderAddNode(DockSpaceId, ImGuiDockNodeFlags_None);

	// Call DockBuilderSplitNode to divide the layout
	ImGuiID RemainAreaId;
	ImGuiID ViewportId = ImGui::DockBuilderSplitNode(DockSpaceId, ImGuiDir_Left, 0.7f, nullptr, &RemainAreaId);
	const ImGuiID UtilsId = ImGui::DockBuilderSplitNode(ViewportId, ImGuiDir_Down, 0.3f, nullptr, &ViewportId);
	const ImGuiID OutlinerId = ImGui::DockBuilderSplitNode(RemainAreaId, ImGuiDir_Up, 0.3f, nullptr, &RemainAreaId);
	const ImGuiID DetailsId = ImGui::DockBuilderSplitNode(RemainAreaId, ImGuiDir_Down, 0.7f, nullptr, &RemainAreaId);

	// Add a mapping relationship between the declared DockId and the actual ID of ImGui
	const TMap<int32, ImGuiID> DockIdMap
	{
		{ Viewport, ViewportId },
		{ Outliner, OutlinerId },
		{ Details, DetailsId },
		{ Utils, UtilsId },
	};
	// Subpanel application layout information
	ApplyPanelDockSettings(LayoutBuilder, DockIdMap, EDockId::Utils);

	ImGui::DockBuilderFinish(DockId);
}

UImGuiWorldDebuggerViewportPanel::UImGuiWorldDebuggerViewportPanel()
{
	// Declares that the menu bar needs to be displayed
	ImGuiWindowFlags = ImGuiWindowFlags_MenuBar;
	// Set panel name
	Title = TEXT("Viewport");
	// The default position in the ImGuiWorldDebuggerDefaultLayout layout is Viewport
	DefaultDockSpace =
	{
		{ UImGuiWorldDebuggerDefaultLayout::StaticClass()->GetFName(), UImGuiWorldDebuggerDefaultLayout::EDockId::Viewport }
	};
}

// RAII style, no need for developers to worry about ImGui::End call
if (ImGui::FWindow Window{ "WindowName" })
{
    ImGui::Text("Content");
}

// Equivalent ImGui default API, need to manage ImGui::End call
if (ImGui::Begin("WindowName"))
{
    ImGui::Text("Content");
}
// Cannot be omitted, otherwise rendering will be incorrect
ImGui::End();