Added file picker code

FilePicker/DummyTextFiles/DummyFile1.txt

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+This is the first line of DummyFile1.txt
+This is a nice line!

FilePicker/FilePicker.Build.cs

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+// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.
+
+using UnrealBuildTool;
+
+public class FilePicker : ModuleRules
+{
+	public FilePicker(ReadOnlyTargetRules Target) : base(Target)
+	{
+		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
+
+		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "HeadMountedDisplay","SlateCore" });
+	}
+}

FilePicker/FilePickerCharacter.cpp

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+// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.
+
+#include "FilePickerCharacter.h"
+#include "HeadMountedDisplayFunctionLibrary.h"
+#include "Camera/CameraComponent.h"
+#include "Components/CapsuleComponent.h"
+#include "Components/InputComponent.h"
+#include "GameFramework/CharacterMovementComponent.h"
+#include "GameFramework/Controller.h"
+#include "GameFramework/SpringArmComponent.h"
+
+//File picker includes
+#include "Developer/DesktopPlatform/Public/IDesktopPlatform.h"
+#include "Developer/DesktopPlatform/Public/DesktopPlatformModule.h"
+
+//////////////////////////////////////////////////////////////////////////
+// AFilePickerCharacter
+
+AFilePickerCharacter::AFilePickerCharacter()
+{
+	// Set size for collision capsule
+	GetCapsuleComponent()->InitCapsuleSize(42.f, 96.0f);
+
+	// set our turn rates for input
+	BaseTurnRate = 45.f;
+	BaseLookUpRate = 45.f;
+
+	// Don't rotate when the controller rotates. Let that just affect the camera.
+	bUseControllerRotationPitch = false;
+	bUseControllerRotationYaw = false;
+	bUseControllerRotationRoll = false;
+
+	// Configure character movement
+	GetCharacterMovement()->bOrientRotationToMovement = true; // Character moves in the direction of input...	
+	GetCharacterMovement()->RotationRate = FRotator(0.0f, 540.0f, 0.0f); // ...at this rotation rate
+	GetCharacterMovement()->JumpZVelocity = 600.f;
+	GetCharacterMovement()->AirControl = 0.2f;
+
+	// Create a camera boom (pulls in towards the player if there is a collision)
+	CameraBoom = CreateDefaultSubobject<USpringArmComponent>(TEXT("CameraBoom"));
+	CameraBoom->SetupAttachment(RootComponent);
+	CameraBoom->TargetArmLength = 300.0f; // The camera follows at this distance behind the character	
+	CameraBoom->bUsePawnControlRotation = true; // Rotate the arm based on the controller
+
+	// Create a follow camera
+	FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));
+	FollowCamera->SetupAttachment(CameraBoom, USpringArmComponent::SocketName); // Attach the camera to the end of the boom and let the boom adjust to match the controller orientation
+	FollowCamera->bUsePawnControlRotation = false; // Camera does not rotate relative to arm
+
+	// Note: The skeletal mesh and anim blueprint references on the Mesh component (inherited from Character) 
+	// are set in the derived blueprint asset named MyCharacter (to avoid direct content references in C++)
+}
+
+//////////////////////////////////////////////////////////////////////////
+// Input
+
+void AFilePickerCharacter::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)
+{
+	// Set up gameplay key bindings
+	check(PlayerInputComponent);
+	PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &ACharacter::Jump);
+	PlayerInputComponent->BindAction("Jump", IE_Released, this, &ACharacter::StopJumping);
+
+	PlayerInputComponent->BindAxis("MoveForward", this, &AFilePickerCharacter::MoveForward);
+	PlayerInputComponent->BindAxis("MoveRight", this, &AFilePickerCharacter::MoveRight);
+
+	// We have 2 versions of the rotation bindings to handle different kinds of devices differently
+	// "turn" handles devices that provide an absolute delta, such as a mouse.
+	// "turnrate" is for devices that we choose to treat as a rate of change, such as an analog joystick
+	PlayerInputComponent->BindAxis("Turn", this, &APawn::AddControllerYawInput);
+	PlayerInputComponent->BindAxis("TurnRate", this, &AFilePickerCharacter::TurnAtRate);
+	PlayerInputComponent->BindAxis("LookUp", this, &APawn::AddControllerPitchInput);
+	PlayerInputComponent->BindAxis("LookUpRate", this, &AFilePickerCharacter::LookUpAtRate);
+
+	// handle touch devices
+	PlayerInputComponent->BindTouch(IE_Pressed, this, &AFilePickerCharacter::TouchStarted);
+	PlayerInputComponent->BindTouch(IE_Released, this, &AFilePickerCharacter::TouchStopped);
+
+	// VR headset functionality
+	PlayerInputComponent->BindAction("ResetVR", IE_Pressed, this, &AFilePickerCharacter::OnResetVR);
+}
+
+
+void AFilePickerCharacter::OpenFileDialog(const FString& DialogTitle, const FString& DefaultPath, const FString& FileTypes, TArray<FString>& OutFileNames)
+{
+	if (GEngine)
+	{
+		if (GEngine->GameViewport)
+		{
+			void* ParentWindowHandle = GEngine->GameViewport->GetWindow()->GetNativeWindow()->GetOSWindowHandle();
+			IDesktopPlatform* DesktopPlatform = FDesktopPlatformModule::Get();
+			if (DesktopPlatform)
+			{
+				//Opening the file picker!
+				uint32 SelectionFlag = 0; //A value of 0 represents single file selection while a value of 1 represents multiple file selection
+				DesktopPlatform->OpenFileDialog(ParentWindowHandle, DialogTitle, DefaultPath, FString(""), FileTypes, SelectionFlag, OutFileNames);
+			}
+		}
+	}
+}
+
+void AFilePickerCharacter::PrintData(const FString& File)
+{
+	TArray<FString> LoadedText;
+	FFileHelper::LoadFileToStringArray(LoadedText, *File);
+	for (int32 i = 0; i < LoadedText.Num(); i++)
+	{
+		GLog->Log(LoadedText[i]);
+	}
+}
+
+void AFilePickerCharacter::OnResetVR()
+{
+	UHeadMountedDisplayFunctionLibrary::ResetOrientationAndPosition();
+}
+
+void AFilePickerCharacter::TouchStarted(ETouchIndex::Type FingerIndex, FVector Location)
+{
+		Jump();
+}
+
+void AFilePickerCharacter::TouchStopped(ETouchIndex::Type FingerIndex, FVector Location)
+{
+		StopJumping();
+}
+
+void AFilePickerCharacter::TurnAtRate(float Rate)
+{
+	// calculate delta for this frame from the rate information
+	AddControllerYawInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds());
+}
+
+void AFilePickerCharacter::LookUpAtRate(float Rate)
+{
+	// calculate delta for this frame from the rate information
+	AddControllerPitchInput(Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds());
+}
+
+void AFilePickerCharacter::MoveForward(float Value)
+{
+	if ((Controller != NULL) && (Value != 0.0f))
+	{
+		// find out which way is forward
+		const FRotator Rotation = Controller->GetControlRotation();
+		const FRotator YawRotation(0, Rotation.Yaw, 0);
+
+		// get forward vector
+		const FVector Direction = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::X);
+		AddMovementInput(Direction, Value);
+	}
+}
+
+void AFilePickerCharacter::MoveRight(float Value)
+{
+	if ( (Controller != NULL) && (Value != 0.0f) )
+	{
+		// find out which way is right
+		const FRotator Rotation = Controller->GetControlRotation();
+		const FRotator YawRotation(0, Rotation.Yaw, 0);
+
+		// get right vector 
+		const FVector Direction = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::Y);
+		// add movement in that direction
+		AddMovementInput(Direction, Value);
+	}
+}

FilePicker/FilePickerCharacter.h

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+// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Character.h"
+#include "FilePickerCharacter.generated.h"
+
+UCLASS(config=Game)
+class AFilePickerCharacter : public ACharacter
+{
+	GENERATED_BODY()
+
+	/** Camera boom positioning the camera behind the character */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
+	class USpringArmComponent* CameraBoom;
+
+	/** Follow camera */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
+	class UCameraComponent* FollowCamera;
+public:
+	AFilePickerCharacter();
+
+	/** Base turn rate, in deg/sec. Other scaling may affect final turn rate. */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
+	float BaseTurnRate;
+
+	/** Base look up/down rate, in deg/sec. Other scaling may affect final rate. */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
+	float BaseLookUpRate;
+
+protected:
+
+	/** Resets HMD orientation in VR. */
+	void OnResetVR();
+
+	/** Called for forwards/backward input */
+	void MoveForward(float Value);
+
+	/** Called for side to side input */
+	void MoveRight(float Value);
+
+	/** 
+	 * Called via input to turn at a given rate. 
+	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
+	 */
+	void TurnAtRate(float Rate);
+
+	/**
+	 * Called via input to turn look up/down at a given rate. 
+	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
+	 */
+	void LookUpAtRate(float Rate);
+
+	/** Handler for when a touch input begins. */
+	void TouchStarted(ETouchIndex::Type FingerIndex, FVector Location);
+
+	/** Handler for when a touch input stops. */
+	void TouchStopped(ETouchIndex::Type FingerIndex, FVector Location);
+
+protected:
+	// APawn interface
+	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
+	// End of APawn interface
+
+public:
+	/** Returns CameraBoom subobject **/
+	FORCEINLINE class USpringArmComponent* GetCameraBoom() const { return CameraBoom; }
+	/** Returns FollowCamera subobject **/
+	FORCEINLINE class UCameraComponent* GetFollowCamera() const { return FollowCamera; }
+
+	/*
+	 * Opens a file dialog for the specified data
+	 * Filetypes must be in the format of: <File type Description>|*.<actual extension>
+	 * You can combine multiple extensions by placing ";" between them
+	 * For example: Text Files|*.txt|Excel files|*.csv|Image Files|*.png;*.jpg;*.bmp will display 3 lines for 3 different type of files.
+	 */
+	UFUNCTION(BlueprintCallable, Category = "FilePicker")
+	void OpenFileDialog(const FString& DialogTitle, const FString& DefaultPath, const FString& FileTypes, TArray<FString>& OutFileNames);
+
+	/*Prints the data of the given file*/
+	UFUNCTION(BlueprintCallable, Category = "FilePicker")
+	void PrintData(const FString& File);
+};
+

FilePicker/README.md

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+# File picker tutorial
+
+Read the full tutorial here: https://wp.me/p6hvtS-ry