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36cbbda965
#jira UE-117887 #rb Vincent.Gauthier #preflight 6148f759315f54000134958f [CL 17576768 by daren cheng in ue5-main branch]
150 lines
3.4 KiB
C++
150 lines
3.4 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Components/ScrollBar.h"
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#include "UObject/EditorObjectVersion.h"
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#include "Styling/UMGCoreStyle.h"
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#define LOCTEXT_NAMESPACE "UMG"
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/////////////////////////////////////////////////////
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// UScrollBar
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static FScrollBarStyle* DefaultScrollBarStyle = nullptr;
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#if WITH_EDITOR
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static FScrollBarStyle* EditorScrollBarStyle = nullptr;
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#endif
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UScrollBar::UScrollBar(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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bIsVariable = false;
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bAlwaysShowScrollbar = true;
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bAlwaysShowScrollbarTrack = true;
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Orientation = Orient_Vertical;
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Thickness = FVector2D(16.0f, 16.0f);
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Padding = FMargin(2.0f);
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if (DefaultScrollBarStyle == nullptr)
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{
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DefaultScrollBarStyle = new FScrollBarStyle(FUMGCoreStyle::Get().GetWidgetStyle<FScrollBarStyle>("Scrollbar"));
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// Unlink UMG default colors.
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DefaultScrollBarStyle->UnlinkColors();
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}
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WidgetStyle = *DefaultScrollBarStyle;
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#if WITH_EDITOR
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if (EditorScrollBarStyle == nullptr)
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{
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EditorScrollBarStyle = new FScrollBarStyle(FCoreStyle::Get().GetWidgetStyle<FScrollBarStyle>("Scrollbar"));
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// Unlink UMG Editor colors from the editor settings colors.
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EditorScrollBarStyle->UnlinkColors();
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}
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if (IsEditorWidget())
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{
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WidgetStyle = *EditorScrollBarStyle;
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// The CDO isn't an editor widget and thus won't use the editor style, call post edit change to mark difference from CDO
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PostEditChange();
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}
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#endif // WITH_EDITOR
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}
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void UScrollBar::ReleaseSlateResources(bool bReleaseChildren)
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{
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Super::ReleaseSlateResources(bReleaseChildren);
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MyScrollBar.Reset();
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}
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TSharedRef<SWidget> UScrollBar::RebuildWidget()
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{
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MyScrollBar = SNew(SScrollBar)
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.Style(&WidgetStyle)
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.AlwaysShowScrollbar(bAlwaysShowScrollbar)
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.AlwaysShowScrollbarTrack(bAlwaysShowScrollbarTrack)
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.Orientation(Orientation)
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.Thickness(Thickness)
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.Padding(Padding);
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//SLATE_EVENT(FOnUserScrolled, OnUserScrolled)
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return MyScrollBar.ToSharedRef();
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}
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void UScrollBar::SynchronizeProperties()
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{
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Super::SynchronizeProperties();
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//MyScrollBar->SetScrollOffset(DesiredScrollOffset);
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}
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void UScrollBar::SetState(float InOffsetFraction, float InThumbSizeFraction)
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{
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if ( MyScrollBar.IsValid() )
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{
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MyScrollBar->SetState(InOffsetFraction, InThumbSizeFraction);
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}
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}
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#if WITH_EDITORONLY_DATA
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void UScrollBar::Serialize(FArchive& Ar)
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{
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Ar.UsingCustomVersion(FEditorObjectVersion::GUID);
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const bool bDeprecateThickness = Ar.IsLoading() && Ar.CustomVer(FEditorObjectVersion::GUID) < FEditorObjectVersion::ScrollBarThicknessChange;
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if (bDeprecateThickness)
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{
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// Set Thickness property to previous default value.
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Thickness.Set(12.0f, 12.0f);
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}
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Super::Serialize(Ar);
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if (bDeprecateThickness)
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{
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// Implicit padding of 2 was removed, so Thickness value must be incremented by 4.
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Thickness += FVector2D(4.0f, 4.0f);
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}
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}
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void UScrollBar::PostLoad()
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{
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Super::PostLoad();
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if ( GetLinkerUEVersion() < VER_UE4_DEPRECATE_UMG_STYLE_ASSETS )
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{
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if ( Style_DEPRECATED != nullptr )
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{
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const FScrollBarStyle* StylePtr = Style_DEPRECATED->GetStyle<FScrollBarStyle>();
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if ( StylePtr != nullptr )
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{
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WidgetStyle = *StylePtr;
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}
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Style_DEPRECATED = nullptr;
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}
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}
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}
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#endif // if WITH_EDITORONLY_DATA
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#if WITH_EDITOR
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const FText UScrollBar::GetPaletteCategory()
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{
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return LOCTEXT("Primitive", "Primitive");
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}
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#endif
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/////////////////////////////////////////////////////
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#undef LOCTEXT_NAMESPACE
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