128 lines
4.2 KiB
C++
128 lines
4.2 KiB
C++
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/************************************************************************************
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* *
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* Copyright (C) 2020 Truong Bui. *
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* Website: https://github.com/truong-bui/AsyncLoadingScreen *
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* Licensed under the MIT License. See 'LICENSE' file for full license information. *
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* *
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************************************************************************************/
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#include "SLoadingWidget.h"
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#include "Widgets/Images/SImage.h"
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#include "Slate/DeferredCleanupSlateBrush.h"
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#include "Widgets/Layout/SSpacer.h"
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#include "Engine/Texture2D.h"
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#include "MoviePlayer.h"
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#include "Widgets/SCompoundWidget.h"
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int32 SLoadingWidget::OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const
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{
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TotalDeltaTime += Args.GetDeltaTime();
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if (TotalDeltaTime >= Interval)
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{
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if (CleanupBrushList.Num() > 1)
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{
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if (bPlayReverse)
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{
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ImageIndex--;
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}
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else
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{
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ImageIndex++;
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}
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if (ImageIndex >= CleanupBrushList.Num())
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{
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ImageIndex = 0;
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}
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else if (ImageIndex < 0)
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{
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ImageIndex = CleanupBrushList.Num() - 1;
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}
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StaticCastSharedRef<SImage>(LoadingIcon)->SetImage(CleanupBrushList[ImageIndex].IsValid() ? CleanupBrushList[ImageIndex]->GetSlateBrush() : nullptr);
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}
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TotalDeltaTime = 0.0f;
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}
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return SCompoundWidget::OnPaint(Args, AllottedGeometry, MyCullingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled);
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}
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SThrobber::EAnimation SLoadingWidget::GetThrobberAnimation(const FThrobberSettings& ThrobberSettings) const
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{
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const int32 AnimationParams = (ThrobberSettings.bAnimateVertically ? SThrobber::Vertical : 0) |
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(ThrobberSettings.bAnimateHorizontally ? SThrobber::Horizontal : 0) |
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(ThrobberSettings.bAnimateOpacity ? SThrobber::Opacity : 0);
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return static_cast<SThrobber::EAnimation>(AnimationParams);
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}
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void SLoadingWidget::ConstructLoadingIcon(const FLoadingWidgetSettings& Settings)
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{
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if (Settings.LoadingIconType == ELoadingIconType::LIT_ImageSequence)
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{
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// Loading Widget is image sequence
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if (Settings.ImageSequenceSettings.Images.Num() > 0)
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{
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CleanupBrushList.Empty();
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ImageIndex = 0;
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FVector2D Scale = Settings.ImageSequenceSettings.Scale;
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for (auto Image: Settings.ImageSequenceSettings.Images)
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{
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if (Image)
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{
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CleanupBrushList.Add(FDeferredCleanupSlateBrush::CreateBrush(Image, FVector2D(Image->GetSurfaceWidth() * Scale.X, Image->GetSurfaceHeight() * Scale.Y)));
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}
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}
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// Create Image slate widget
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LoadingIcon = SNew(SImage)
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.Image(CleanupBrushList[ImageIndex]->GetSlateBrush());
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// Update play animation interval
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Interval = Settings.ImageSequenceSettings.Interval;
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}
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else
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{
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// If there is no image in the array then create a spacer instead
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LoadingIcon = SNew(SSpacer).Size(FVector2D::ZeroVector);
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}
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}
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else if (Settings.LoadingIconType == ELoadingIconType::LIT_CircularThrobber)
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{
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// Loading Widget is SCircularThrobber
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LoadingIcon = SNew(SCircularThrobber)
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.NumPieces(Settings.CircularThrobberSettings.NumberOfPieces)
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.Period(Settings.CircularThrobberSettings.Period)
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.Radius(Settings.CircularThrobberSettings.Radius)
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.PieceImage(&Settings.CircularThrobberSettings.Image);
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}
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else
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{
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// Loading Widget is SThrobber
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LoadingIcon = SNew(SThrobber)
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.NumPieces(Settings.ThrobberSettings.NumberOfPieces)
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.Animate(GetThrobberAnimation(Settings.ThrobberSettings))
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.PieceImage(&Settings.ThrobberSettings.Image);
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}
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// Set Loading Icon render transform
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LoadingIcon.Get().SetRenderTransform(FSlateRenderTransform(FScale2D(Settings.TransformScale), Settings.TransformTranslation));
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LoadingIcon.Get().SetRenderTransformPivot(Settings.TransformPivot);
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// Hide loading widget when level loading is done if bHideLoadingWidgetWhenCompletes is true
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if (Settings.bHideLoadingWidgetWhenCompletes)
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{
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SetVisibility(TAttribute<EVisibility>::Create(TAttribute<EVisibility>::FGetter::CreateRaw(this, &SLoadingWidget::GetLoadingWidgetVisibility)));
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}
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}
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EVisibility SLoadingWidget::GetLoadingWidgetVisibility() const
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{
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return GetMoviePlayer()->IsLoadingFinished() ? EVisibility::Hidden : EVisibility::Visible;
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}
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