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134 lines
3.7 KiB
C++
134 lines
3.7 KiB
C++
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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#include "PersonaPrivatePCH.h"
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#include "SAnimCurveEd.h"
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#include "Editor/KismetWidgets/Public/SScrubWidget.h"
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#define LOCTEXT_NAMESPACE "AnimCurveEd"
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//////////////////////////////////////////////////////////////////////////
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// SAnimCurveEd : anim curve editor
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float SAnimCurveEd::GetTimeStep(FTrackScaleInfo &ScaleInfo)const
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{
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if(NumberOfKeys.Get())
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{
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int32 Divider = SScrubWidget::GetDivider(ViewMinInput.Get(), ViewMaxInput.Get(), ScaleInfo.WidgetSize, TimelineLength.Get(), NumberOfKeys.Get());
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float TimePerKey;
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if(NumberOfKeys.Get() != 0.f)
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{
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TimePerKey = TimelineLength.Get()/(float)NumberOfKeys.Get();
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}
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else
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{
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TimePerKey = 1.f;
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}
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return TimePerKey * Divider;
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}
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return 0.0f;
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}
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int32 SAnimCurveEd::OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const
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{
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int32 NewLayerId = SCurveEditor::OnPaint(Args, AllottedGeometry, MyClippingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled) + 1;
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float Value = 0.f;
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if(OnGetScrubValue.IsBound())
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{
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Value = OnGetScrubValue.Execute();
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}
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FPaintGeometry MyGeometry = AllottedGeometry.ToPaintGeometry();
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// scale info
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FTrackScaleInfo ScaleInfo(ViewMinInput.Get(), ViewMaxInput.Get(), 0.f, 0.f, AllottedGeometry.Size);
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float XPos = ScaleInfo.InputToLocalX(Value);
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TArray<FVector2D> LinePoints;
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LinePoints.Add(FVector2D(XPos-1, 0.f));
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LinePoints.Add(FVector2D(XPos+1, AllottedGeometry.Size.Y));
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FSlateDrawElement::MakeLines(
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OutDrawElements,
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NewLayerId,
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MyGeometry,
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LinePoints,
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MyClippingRect,
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ESlateDrawEffect::None,
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FLinearColor::Red
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);
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// now draw scrub with new layer ID + 1;
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return NewLayerId;
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}
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FReply SAnimCurveEd::OnMouseWheel(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent)
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{
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const float ZoomDelta = -0.1f * MouseEvent.GetWheelDelta();
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const FVector2D WidgetSpace = MyGeometry.AbsoluteToLocal(MouseEvent.GetScreenSpacePosition());
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const float ZoomRatio = FMath::Clamp((WidgetSpace.X / MyGeometry.Size.X), 0.f, 1.f);
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{
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const float InputViewSize = ViewMaxInput.Get() - ViewMinInput.Get();
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const float InputChange = InputViewSize * ZoomDelta;
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float NewViewMinInput = ViewMinInput.Get() - (InputChange * ZoomRatio);
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float NewViewMaxInput = ViewMaxInput.Get() + (InputChange * (1.f - ZoomRatio));
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SetInputMinMax(NewViewMinInput, NewViewMaxInput);
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}
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return FReply::Handled();
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}
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FCursorReply SAnimCurveEd::OnCursorQuery(const FGeometry& MyGeometry, const FPointerEvent& CursorEvent) const
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{
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if(ViewMinInput.Get() > 0.f || ViewMaxInput.Get() < TimelineLength.Get())
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{
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return FCursorReply::Cursor(EMouseCursor::GrabHand);
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}
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return FCursorReply::Unhandled();
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}
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void SAnimCurveEd::Construct(const FArguments& InArgs)
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{
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OnGetScrubValue = InArgs._OnGetScrubValue;
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NumberOfKeys = InArgs._NumberOfKeys;
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SCurveEditor::Construct(SCurveEditor::FArguments()
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.ViewMinInput(InArgs._ViewMinInput)
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.ViewMaxInput(InArgs._ViewMaxInput)
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.DataMinInput(InArgs._DataMinInput)
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.DataMaxInput(InArgs._DataMaxInput)
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.ViewMinOutput(0.f)
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.ViewMaxOutput(1.f)
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.ZoomToFitVertical(true)
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.ZoomToFitHorizontal(false)
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.TimelineLength(InArgs._TimelineLength)
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.DrawCurve(InArgs._DrawCurve)
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.HideUI(InArgs._HideUI)
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.AllowZoomOutput(false)
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.DesiredSize(InArgs._DesiredSize)
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.OnSetInputViewRange(InArgs._OnSetInputViewRange));
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}
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void SAnimCurveEd::SetDefaultOutput(const float MinZoomRange)
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{
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const float NewMinOutput = (ViewMinOutput.Get());
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const float NewMaxOutput = (ViewMaxOutput.Get() + MinZoomRange);
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SetOutputMinMax(NewMinOutput, NewMaxOutput);
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}
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#undef LOCTEXT_NAMESPACE
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