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Dynamic changing of input image embedded in Rich Text now working

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This commit is contained in:
Steve Streeting 2020-11-24 13:09:00 +00:00
parent 016e3977cf
commit d33ed25bad
1 changed files with 32 additions and 5 deletions
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37
Source/StevesUEHelpers/Private/StevesUI/RichTextBlockInputImageDecorator.cpp
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@ -9,8 +9,8 @@
#include "Widgets/Images/SImage.h"
// Slat SNew only supports 5 custom arguments so we need to batch things up
struct FInputImageParams
// Slate SNew only supports 5 custom arguments so we need to batch things up
struct FRichTextInputImageParams
{
/// What type of an input binding this image should look up
EInputBindingType BindingType;
@ -41,6 +41,7 @@ protected:
URichTextBlockInputImageDecorator* Decorator = nullptr;
FSlateBrush Brush;
float TimeUntilNextSpriteCheck = 0;
public:
SLATE_BEGIN_ARGS(SRichInlineInputImage)
@ -49,7 +50,7 @@ public:
public:
void Construct(const FArguments& InArgs, FInputImageParams InParams,
void Construct(const FArguments& InArgs, FRichTextInputImageParams InParams,
const FTextBlockStyle& TextStyle, TOptional<int32> Width, TOptional<int32> Height, EStretch::Type Stretch)
{
BindingType = InParams.BindingType;
@ -60,12 +61,13 @@ public:
// 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.
// doesn't work, I think perhaps because this Slate Construct call is in another thread which pre-dates it.
// 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);
TimeUntilNextSpriteCheck = 0.25f;
const TSharedRef<FSlateFontMeasure> FontMeasure = FSlateApplication::Get().GetRenderer()->GetFontMeasureService();
float IconHeight = FMath::Min((float)FontMeasure->GetMaxCharacterHeight(TextStyle.Font, 1.0f), Brush.ImageSize.Y);
@ -99,6 +101,30 @@ public:
]
];
}
virtual void Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime) override
{
SCompoundWidget::Tick(AllottedGeometry, InCurrentTime, InDeltaTime);
// I would prefer to hook into the events here but there is NO safe teardown in these RichText decorators
// with which to unsub from events, so we're down to brute forcing this in Tick() le sigh
// At least limit the frequency and only change as needed
TimeUntilNextSpriteCheck -= InDeltaTime;
if (TimeUntilNextSpriteCheck <= 0)
{
auto GS = GetStevesGameSubsystem(Decorator->GetWorld());
if (GS)
{
// Can only support default theme, no way to edit theme in decorator config
auto Sprite = GS->GetInputImageSprite(BindingType, ActionOrAxisName, Key, PlayerIndex);
if (Sprite && Brush.GetResourceObject() != Sprite)
UStevesGameSubsystem::SetBrushFromAtlas(&Brush, Sprite, true);
}
TimeUntilNextSpriteCheck = 0.25f;
}
}
};
// Again, wish I could just subclass FRichInlineImage here, le sigh
@ -127,7 +153,7 @@ protected:
virtual TSharedPtr<SWidget> CreateDecoratorWidget(const FTextRunInfo& RunInfo, const FTextBlockStyle& TextStyle) const override
{
FInputImageParams Params;
FRichTextInputImageParams Params;
Params.PlayerIndex = 0;
Params.BindingType = EInputBindingType::Key;
Params.Key = EKeys::AnyKey;
@ -157,6 +183,7 @@ protected:
// Look up the initial sprite here
// The Slate widget can't do it in Construct because World pointer doesn't work (thread issues?)
// Also annoying: can't keep Brush on this class because this method is const. UGH
auto GS = GetStevesGameSubsystem(Decorator->GetWorld());
if (GS)
{