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Pass initial sprite to Slate widget, it can't look it up because Construct happens in another thread?

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This commit is contained in:
Steve Streeting 2020-11-24 12:01:03 +00:00
parent 1904476cc4
commit 016e3977cf
1 changed files with 34 additions and 15 deletions
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49
Source/StevesUEHelpers/Private/StevesUI/RichTextBlockInputImageDecorator.cpp
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@ -20,9 +20,10 @@ struct FInputImageParams
FKey Key;
/// Player index, if binding type is action or axis
int PlayerIndex;
/// Theme, if any
UUiTheme* CustomTheme;
UWorld* WorldContext;
/// Initial Sprite to use
UPaperSprite* InitialSprite;
/// Parent decorator, for looking up things later
URichTextBlockInputImageDecorator* Decorator;
};
// Basically the same as SRichInlineImage but I can't re-use that since private
class SRichInlineInputImage : public SCompoundWidget
@ -36,9 +37,8 @@ protected:
FKey Key;
/// Player index, if binding type is action or axis
int PlayerIndex = 0;
/// Theme, if any
UUiTheme* CustomTheme = nullptr;
UWorld* WorldContext = nullptr;
/// Parent decorator, for looking up things later
URichTextBlockInputImageDecorator* Decorator = nullptr;
FSlateBrush Brush;
@ -56,12 +56,20 @@ public:
ActionOrAxisName = InParams.ActionOrAxisName;
Key = InParams.Key;
PlayerIndex = InParams.PlayerIndex;
CustomTheme = InParams.CustomTheme;
WorldContext = InParams.WorldContext;
Decorator = InParams.Decorator;
// Sadly, we cannot hook into the events needed to update based on input changes here
// All attempts to use GetStevesGameSubsystem() fail because the world pointer
// doesn't work, I think perhaps because this Slate Construct call is in another thread.
// We will need to do the work to update the brush from the main thread later
// We can use static methods though
if (InParams.InitialSprite)
UStevesGameSubsystem::SetBrushFromAtlas(&Brush, InParams.InitialSprite, true);
const TSharedRef<FSlateFontMeasure> FontMeasure = FSlateApplication::Get().GetRenderer()->GetFontMeasureService();
float IconHeight = FMath::Min((float)FontMeasure->GetMaxCharacterHeight(TextStyle.Font, 1.0f), Brush.ImageSize.Y);
float IconWidth = IconHeight;
float IconWidth = Brush.ImageSize.X * (IconHeight / Brush.ImageSize.Y) ;
if (Width.IsSet())
{
@ -73,12 +81,6 @@ public:
IconHeight = Height.GetValue();
}
auto GS = GetStevesGameSubsystem(WorldContext);
if (GS)
{
auto Sprite = GS->GetInputImageSprite(BindingType, ActionOrAxisName, Key, PlayerIndex, CustomTheme);
GS->SetBrushFromAtlas(&Brush, Sprite, true);
}
ChildSlot
[
@ -129,6 +131,7 @@ protected:
Params.PlayerIndex = 0;
Params.BindingType = EInputBindingType::Key;
Params.Key = EKeys::AnyKey;
Params.Decorator = Decorator;
if (const FString* PlayerStr = RunInfo.MetaData.Find(TEXT("player")))
{
@ -152,6 +155,22 @@ protected:
Params.ActionOrAxisName = **AxisStr;
}
// Look up the initial sprite here
// The Slate widget can't do it in Construct because World pointer doesn't work (thread issues?)
auto GS = GetStevesGameSubsystem(Decorator->GetWorld());
if (GS)
{
// Can only support default theme, no way to edit theme in decorator config
Params.InitialSprite = GS->GetInputImageSprite(Params.BindingType, Params.ActionOrAxisName, Params.Key, Params.PlayerIndex);
}
else
{
// Might be false because this gets executed in the editor too
// TODO use a placeholder?
Params.InitialSprite = nullptr;
}
// Support the same width/height/stretch overrides as standard rich text images
TOptional<int32> Width;
if (const FString* WidthString = RunInfo.MetaData.Find(TEXT("width")))