102 lines
3.0 KiB
C++
102 lines
3.0 KiB
C++
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// Copyright Epic Games, Inc. All Rights Reserved.
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#include "UI/LyraJoystickWidget.h"
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#include "Components/Image.h"
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#define LOCTEXT_NAMESPACE "LyraJoystick"
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ULyraJoystickWidget::ULyraJoystickWidget(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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SetConsumePointerInput(true);
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}
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FReply ULyraJoystickWidget::NativeOnTouchStarted(const FGeometry& InGeometry, const FPointerEvent& InGestureEvent)
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{
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Super::NativeOnTouchStarted(InGeometry, InGestureEvent);
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TouchOrigin = InGestureEvent.GetScreenSpacePosition();
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FReply Reply = FReply::Handled();
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if (!HasMouseCaptureByUser(InGestureEvent.GetUserIndex(), InGestureEvent.GetPointerIndex()))
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{
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Reply.CaptureMouse(GetCachedWidget().ToSharedRef());
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}
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return Reply;
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}
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FReply ULyraJoystickWidget::NativeOnTouchMoved(const FGeometry& InGeometry, const FPointerEvent& InGestureEvent)
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{
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Super::NativeOnTouchMoved(InGeometry, InGestureEvent);
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HandleTouchDelta(InGeometry, InGestureEvent);
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FReply Reply = FReply::Handled();
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if (!HasMouseCaptureByUser(InGestureEvent.GetUserIndex(), InGestureEvent.GetPointerIndex()))
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{
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Reply.CaptureMouse(GetCachedWidget().ToSharedRef());
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}
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return Reply;
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}
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FReply ULyraJoystickWidget::NativeOnTouchEnded(const FGeometry& InGeometry, const FPointerEvent& InGestureEvent)
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{
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StopInputSimulation();
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return FReply::Handled().ReleaseMouseCapture();
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}
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void ULyraJoystickWidget::NativeOnMouseLeave(const FPointerEvent& InMouseEvent)
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{
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Super::NativeOnMouseLeave(InMouseEvent);
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StopInputSimulation();
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}
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void ULyraJoystickWidget::NativeTick(const FGeometry& MyGeometry, float InDeltaTime)
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{
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Super::NativeTick(MyGeometry, InDeltaTime);
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// Move the inner stick icon around with the vector
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if (JoystickForeground && JoystickBackground)
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{
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JoystickForeground->SetRenderTranslation(
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(bNegateYAxis ? FVector2D(1.0f, -1.0f) : FVector2D(1.0f)) *
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StickVector *
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(JoystickBackground->GetDesiredSize() * 0.5f)
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);
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}
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InputKeyValue2D(StickVector);
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}
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void ULyraJoystickWidget::HandleTouchDelta(const FGeometry& InGeometry, const FPointerEvent& InGestureEvent)
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{
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const FVector2D& ScreenSpacePos = InGestureEvent.GetScreenSpacePosition();
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// The center of the geo locally is just its size
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FVector2D LocalStickCenter = InGeometry.GetAbsoluteSize();
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FVector2D ScreenSpaceStickCenter = InGeometry.LocalToAbsolute(LocalStickCenter);
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// Get the offset from the origin
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FVector2D MoveStickOffset = (ScreenSpacePos - ScreenSpaceStickCenter);
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if (bNegateYAxis)
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{
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MoveStickOffset *= FVector2D(1.0f, -1.0f);
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}
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FVector2D MoveStickDir = FVector2D::ZeroVector;
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float MoveStickLength = 0.0f;
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MoveStickOffset.ToDirectionAndLength(MoveStickDir, MoveStickLength);
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MoveStickLength = FMath::Min(MoveStickLength, StickRange);
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MoveStickOffset = MoveStickDir * MoveStickLength;
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StickVector = MoveStickOffset / StickRange;
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}
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void ULyraJoystickWidget::StopInputSimulation()
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{
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TouchOrigin = FVector2D::ZeroVector;
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StickVector = FVector2D::ZeroVector;
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}
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#undef LOCTEXT_NAMESPACE
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