Linux: switch from LinuxNativeDialogs to SlateFileDialogs.

- Still experimental at this point. #codereview Nick.Atamas, Matthew.Lewis, Josh.Adams [CL 2587983 by Dmitry Rekman in Main branch]
2026-03-26 18:15:20 -07:00 · 2015-06-15 18:14:07 -04:00
parent dbaeca3b06
commit eae52c65aa
11 changed files with 1814 additions and 9 deletions
@@ -0,0 +1,269 @@
+// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
+
+#pragma once
+#include "SlateBasics.h"
+#include "STextComboBox.h"
+#include "SBreadcrumbTrail.h"
+#include "SInlineEditableTextBlock.h"
+
+#include "DirectoryWatcherModule.h"
+
+#define LOCTEXT_NAMESPACE "SlateFileDialogsNamespace"
+
+class SSlateFileOpenDlg;
+
+//-----------------------------------------------------------------------------
+struct FFileEntry
+{
+	FString	Label;
+	FString ModDate;
+	FString FileSize;
+	bool bIsSelected;
+	bool bIsDirectory;
+
+	FFileEntry() { }
+
+	FFileEntry(FString InLabel, FString InModDate, FString InFileSize, bool InIsDirectory)
+	{
+		Label = InLabel;
+		ModDate = FString(InModDate);
+		FileSize = FString(InFileSize);
+		bIsSelected = false;
+		bIsDirectory = InIsDirectory;
+	}
+
+	inline static bool ConstPredicate ( const TSharedPtr<FFileEntry> Entry1, const TSharedPtr<FFileEntry> Entry2)
+	{
+		return (Entry1->Label.Compare( Entry2->Label ) < 0);
+	}
+};
+
+typedef TSharedPtr<FFileEntry> SSlateFileDialogItemPtr;
+
+
+//-----------------------------------------------------------------------------
+class FSlateFileDlgWindow
+{
+public:
+	enum EResult
+	{
+		Cancel = 0,
+		Accept = 1,
+		Engine = 2,
+		Project = 3
+	};
+
+	bool OpenFileDialog(const void* ParentWindowHandle, const FString& DialogTitle, const FString& DefaultPath,
+		const FString& DefaultFile, const FString& FileTypes, uint32 Flags, TArray<FString>& OutFilenames, int32& OutFilterIndex);
+
+	bool OpenFileDialog(const void* ParentWindowHandle, const FString& DialogTitle, const FString& DefaultPath,
+		const FString& DefaultFile, const FString& FileTypes, uint32 Flags, TArray<FString>& OutFilenames);
+
+	bool OpenDirectoryDialog(const void* ParentWindowHandle, const FString& DialogTitle, const FString& DefaultPath,
+		FString& OutFoldername);
+
+	bool SaveFileDialog(const void* ParentWindowHandle, const FString& DialogTitle, const FString& DefaultPath,
+		const FString& DefaultFile, const FString& FileTypes, uint32 Flags, TArray<FString>& OutFilenames);
+
+private:	
+	TSharedPtr<class SSlateFileOpenDlg> DialogWidget;
+	FString CurrentDirectory;
+};
+
+
+
+//-----------------------------------------------------------------------------
+class SSlateFileOpenDlg : public SCompoundWidget
+{
+public:
+	struct FDirNode
+	{
+		FString	Label;
+		TSharedPtr<STextBlock> TextBlock;
+		TSharedPtr<SButton> Button;
+
+		FDirNode() { }
+
+		FDirNode(FString InLabel, TSharedPtr<STextBlock> InTextBlock)
+		{
+			Label = InLabel;
+			TextBlock = InTextBlock;
+		}
+	};
+
+	SLATE_BEGIN_ARGS(SSlateFileOpenDlg)
+		: _CurrentPath(TEXT("")),
+		_Filters(TEXT("")),
+		_bMultiSelectEnabled(false),
+		_WindowTitleText(TEXT("")),
+		_AcceptText(LOCTEXT("SlateDialogOpen","Open")),
+		_bDirectoriesOnly(false),
+		_bSaveFile(false),
+		_OutNames(nullptr),
+		_OutFilterIndex(nullptr),
+		_ParentWindow(nullptr)
+	{}
+
+	SLATE_ATTRIBUTE(FString, CurrentPath)
+	SLATE_ATTRIBUTE(FString, Filters)
+	SLATE_ATTRIBUTE(bool, bMultiSelectEnabled)
+	SLATE_ATTRIBUTE(FString, WindowTitleText)
+	SLATE_ATTRIBUTE(FText, AcceptText)
+	SLATE_ATTRIBUTE(bool, bDirectoriesOnly)
+	SLATE_ATTRIBUTE(bool, bSaveFile)
+	SLATE_ATTRIBUTE(TArray<FString> *, OutNames)
+	SLATE_ATTRIBUTE(int32 *, OutFilterIndex)
+	SLATE_ATTRIBUTE(TWeakPtr<SWindow>, ParentWindow)
+	SLATE_END_ARGS()
+
+	void Construct(const FArguments& InArgs);
+	FSlateFileDlgWindow::EResult GetResponse() { return UserResponse; }
+	void SetOutNames(TArray<FString> *Ptr) { OutNames = Ptr; }
+	void SetOutFilterIndex(int32 *FilterIndex) { OutFilterIndex = FilterIndex; }
+	void SetDefaultFile(FString DefaultFile);
+
+private:	
+	void OnPathClicked( const FString & CrumbData );
+	TSharedPtr<SWidget> OnGetCrumbDelimiterContent(const FString& CrumbData) const;
+	void RebuildFileTable();
+	void BuildDirectoryPath();
+	void ReadDir(bool bIsRefresh = false);
+	void RefreshCrumbs ( );
+	void OnPathMenuItemClicked( FString ClickedPath );
+	void OnItemSelected(TSharedPtr<FFileEntry> Item, ESelectInfo::Type SelectInfo);
+
+	void Tick(const FGeometry &AllottedGeometry, const double InCurrentTime, const float InDeltaTime);
+
+	TSharedRef<ITableRow> OnGenerateWidgetForList(TSharedPtr<FFileEntry> Item, const TSharedRef<STableViewBase> &OwnerTable);
+	void OnItemDoubleClicked(TSharedPtr<FFileEntry> Item);
+
+	void OnFilterChanged(TSharedPtr<FString> NewValue, ESelectInfo::Type SelectInfo);
+	FReply OnAcceptCancelClick(FSlateFileDlgWindow::EResult ButtonID);
+	FReply OnQuickLinkClick(FSlateFileDlgWindow::EResult ButtonID);
+	FReply OnDirSublevelClick(int32 Level);
+	void OnDirectoryChanged(const TArray <FFileChangeData> &FileChanges);	
+	void OnFileNameCommitted(const FText & InText, ETextCommit::Type InCommitType);
+	bool GetFilterExtension(FString &OutString);
+	void ParseFilters();
+
+	TArray< FDirNode > DirectoryNodesArray;
+	TArray<TSharedPtr<FFileEntry>> FoldersArray;
+	TArray<TSharedPtr<FFileEntry>> FilesArray;
+	TArray<TSharedPtr<FFileEntry>> LineItemArray;	
+
+	TSharedPtr<STextComboBox> FilterCombo;
+	TSharedPtr<SHorizontalBox> FilterHBox;
+	TSharedPtr<SInlineEditableTextBlock> SaveFilenameEditBox;
+	TSharedPtr<SBox> SaveFilenameSizeBox;
+	TSharedPtr<STextBlock> WindowTitle;
+	TSharedPtr<SListView<TSharedPtr<FFileEntry>>> ListView;
+	TSharedPtr<SBreadcrumbTrail<FString>> PathBreadcrumbTrail;
+	
+	TArray<TSharedPtr<FString>> FilterNameArray;
+	TArray<TSharedPtr<FString>> FilterListArray;
+
+	int32 FilterIndex;
+
+	FSlateFileDlgWindow::EResult	 UserResponse;
+		
+	bool bNeedsBuilding;
+	bool bRebuildDirPath;
+	bool bDirectoryHasChanged;
+
+	int32 DirNodeIndex;
+	FString SaveFilename;
+		
+	TAttribute<TWeakPtr<SWindow>> ParentWindow;
+	TAttribute<FString> CurrentPath;
+	TAttribute<FString> Filters;
+	TAttribute<FString> WindowTitleText;
+	TAttribute<bool> bMultiSelectEnabled;
+	TAttribute<TArray<FString> *> OutNames;
+	TAttribute<int32 *> OutFilterIndex;
+	TAttribute<bool> bDirectoriesOnly;
+	TAttribute<bool> bSaveFile;
+	TAttribute<FText> AcceptText;
+	
+	IDirectoryWatcher *DirectoryWatcher;
+	FDelegateHandle OnDialogDirectoryChangedDelegateHandle;
+	FString RegisteredPath;
+};
+
+
+
+//-----------------------------------------------------------------------------
+class SSlateFileDialogRow : public SMultiColumnTableRow<SSlateFileDialogItemPtr>
+{
+public:
+	
+	SLATE_BEGIN_ARGS(SSlateFileDialogRow) { }
+	SLATE_ARGUMENT(SSlateFileDialogItemPtr, DialogItem)
+	SLATE_END_ARGS()
+
+
+	void Construct(const FArguments& InArgs, const TSharedRef<STableViewBase> &InOwnerTableView)
+	{
+		check(InArgs._DialogItem.IsValid());
+		
+		DialogItem = InArgs._DialogItem;
+		
+		SMultiColumnTableRow<SSlateFileDialogItemPtr>::Construct(FSuperRowType::FArguments(), InOwnerTableView);
+	}
+
+	BEGIN_SLATE_FUNCTION_BUILD_OPTIMIZATION
+	virtual TSharedRef<SWidget> GenerateWidgetForColumn( const FName& ColumnName ) override
+	{
+		FSlateFontInfo ItemFont = FCoreStyle::Get().GetFontStyle("SlateFileDialogs.Dialog");
+		struct EVisibility FolderIconVisibility = DialogItem->bIsDirectory ? EVisibility::Visible : EVisibility::Hidden;
+
+		if (ColumnName == TEXT("Pathname"))
+		{
+			return SNew(SHorizontalBox)
+
+					+ SHorizontalBox::Slot()
+					.HAlign(HAlign_Left)
+					.VAlign(VAlign_Top)
+					.AutoWidth()
+					.Padding(FMargin(5.0f, 2.0f))
+					[
+						SNew(SImage)
+						.Image(FCoreStyle::Get().GetBrush("SlateFileDialogs.Folder16"))
+						.Visibility(FolderIconVisibility)
+					]
+
+					+ SHorizontalBox::Slot()
+					.HAlign(HAlign_Left)
+					.VAlign(VAlign_Top)
+					.AutoWidth()
+					.Padding(FMargin(5.0f, 0.0f, 0.0f, 0.0f))
+					[
+						SNew(STextBlock)
+						.Text(DialogItem->Label)
+						.Font(ItemFont)
+					];
+		}
+		else if (ColumnName == TEXT("ModDate"))
+		{
+			return SNew(STextBlock)
+					.Text(DialogItem->ModDate)
+					.Font(ItemFont);
+		}
+		else if (ColumnName == TEXT("FileSize"))
+		{
+			return SNew(STextBlock)
+					.Text(DialogItem->FileSize)
+					.Font(ItemFont);
+		}
+		else
+		{
+			return SNullWidget::NullWidget;
+		}
+	}	
+	END_SLATE_FUNCTION_BUILD_OPTIMIZATION
+
+	
+private:
+	SSlateFileDialogItemPtr DialogItem;
+};
+
+#undef LOCTEXT_NAMESPACE