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Added file picker code
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‎FilePicker/DummyTextFiles/DummyFile1.txt‎

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

‎FilePicker/DummyTextFiles/DummyFile2.txt‎

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‎FilePicker/FilePicker.Build.cs‎

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

‎FilePicker/FilePickerCharacter.cpp‎

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

‎FilePicker/FilePickerCharacter.h‎

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

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

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