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e1fe0cc030
Allows fast iteration of C++ changes without restarting the application. To use, select the "Live Coding (Experimental)" mode from the drop down menu next to the editor's compile button, or type "LiveCoding" into the console for a monolithic build. Press Ctrl+Alt+F11 to find changes and compile.
Changes vs standalone Live++ version:
* UBT is used to execute builds. This allows standard UE4 adaptive unity mode, allows us to reuse object files when we do regular builds, supports using any build executor allowed by UBT (XGE, SNDBS, etc..).
* Adding new source files is supported.
* Custom visualizer for FNames is supported via a weakly linked symbol in a static library (Engine/Extras/NatvisHelpers).
* Settings are exposed in the editor's project settings dialog.
* Standalone application has been rewritten as a Slate app ("LiveCodingConsole"). There is an additional option to start the program as hidden, where it will not be visible until Ctrl+Alt+F11 is hit. Similarly, closing the window will hide it instead of closing the application.
* Does not require a standalone licensed version of Live++.
Known issues:
* Does not currently support class layout changes / object reinstancing
#rb none
#fyi Marc.Audy, Stefan.Boberg, Nick.Penwarden
#jira
[CL 5304722 by Ben Marsh in 4.22 branch]
150 lines
3.4 KiB
C++
150 lines
3.4 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#include "SLogWidget.h"
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#include "Framework/Text/SlateTextRun.h"
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#include "LiveCodingConsoleStyle.h"
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#include "SlateOptMacros.h"
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BEGIN_SLATE_FUNCTION_BUILD_OPTIMIZATION
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#define LOCTEXT_NAMESPACE "LiveCoding"
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//// FLogWidgetTextLayoutMarshaller ////
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FLogWidgetTextLayoutMarshaller::FLogWidgetTextLayoutMarshaller()
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: TextLayout(nullptr)
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{
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DefaultStyle = FTextBlockStyle()
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.SetFont( FCoreStyle::GetDefaultFontStyle( "Mono", 9 ) )
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.SetColorAndOpacity( FLinearColor::White )
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.SetSelectedBackgroundColor( FLinearColor(0.9f, 0.9f, 0.9f) );
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}
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FLogWidgetTextLayoutMarshaller::~FLogWidgetTextLayoutMarshaller()
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{
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}
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void FLogWidgetTextLayoutMarshaller::SetText(const FString& SourceString, FTextLayout& TargetTextLayout)
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{
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TextLayout = &TargetTextLayout;
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for(const TSharedRef<FString>& Line : Lines)
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{
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TextLayout->AddLine(FSlateTextLayout::FNewLineData(Line, TArray<TSharedRef<IRun>>()));
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}
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}
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void FLogWidgetTextLayoutMarshaller::GetText(FString& TargetString, const FTextLayout& SourceTextLayout)
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{
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SourceTextLayout.GetAsText(TargetString);
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}
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void FLogWidgetTextLayoutMarshaller::Clear()
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{
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Lines.Empty();
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MakeDirty();
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}
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void FLogWidgetTextLayoutMarshaller::AppendLine(const FSlateColor& Color, const FString& Line)
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{
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TSharedRef<FString> NewLine = MakeShared<FString>(Line);
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Lines.Add(NewLine);
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if(TextLayout)
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{
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// Remove the "default" line that's added for an empty text box.
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if(Lines.Num() == 1)
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{
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TextLayout->ClearLines();
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}
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FTextBlockStyle Style = DefaultStyle;
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Style.ColorAndOpacity = Color;
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TArray<TSharedRef<IRun>> Runs;
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Runs.Add(FSlateTextRun::Create(FRunInfo(), NewLine, Style));
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TextLayout->AddLine(FSlateTextLayout::FNewLineData(NewLine, Runs));
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}
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}
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int32 FLogWidgetTextLayoutMarshaller::GetNumLines() const
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{
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return Lines.Num();
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}
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//// SLogWidget ////
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SLogWidget::SLogWidget()
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: bIsUserScrolled(false)
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{
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}
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SLogWidget::~SLogWidget()
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{
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}
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void SLogWidget::Construct(const FArguments& InArgs)
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{
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MessagesTextMarshaller = MakeShared<FLogWidgetTextLayoutMarshaller>();
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ChildSlot
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[
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SNew(SBorder)
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[
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SAssignNew(MessagesTextBox, SMultiLineEditableTextBox)
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.Style(FLiveCodingConsoleStyle::Get(), "Log.TextBox")
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.Marshaller(MessagesTextMarshaller)
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.IsReadOnly(true)
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.AlwaysShowScrollbars(true)
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.OnVScrollBarUserScrolled(this, &SLogWidget::OnScroll)
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]
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];
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RegisterActiveTimer(0.03f, FWidgetActiveTimerDelegate::CreateSP(this, &SLogWidget::OnTimerElapsed));
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}
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void SLogWidget::Clear()
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{
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MessagesTextMarshaller->Clear();
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}
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void SLogWidget::ScrollToEnd()
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{
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MessagesTextBox->ScrollTo(FTextLocation(MessagesTextMarshaller->GetNumLines() - 1));
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bIsUserScrolled = false;
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}
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void SLogWidget::AppendLine(const FSlateColor& Color, const FString& Text)
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{
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FLine Line;
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Line.Color = Color;
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Line.Text = Text;
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FScopeLock Lock(&CriticalSection);
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QueuedLines.Add(MoveTemp(Line));
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}
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void SLogWidget::OnScroll(float ScrollOffset)
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{
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bIsUserScrolled = ScrollOffset < 1.0 && !FMath::IsNearlyEqual(ScrollOffset, 1.0f);
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}
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EActiveTimerReturnType SLogWidget::OnTimerElapsed(double CurrentTime, float DeltaTime)
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{
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FScopeLock Lock(&CriticalSection);
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for(const FLine& QueuedLine : QueuedLines)
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{
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MessagesTextMarshaller->AppendLine(QueuedLine.Color, QueuedLine.Text);
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}
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if(!bIsUserScrolled)
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{
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ScrollToEnd();
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}
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QueuedLines.Empty();
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return EActiveTimerReturnType::Continue;
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}
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#undef LOCTEXT_NAMESPACE
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END_SLATE_FUNCTION_BUILD_OPTIMIZATION
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