131 lines
5.1 KiB
C++
131 lines
5.1 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "SlateFwd.h"
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#include "Misc/Attribute.h"
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#include "InputCoreTypes.h"
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#include "Types/SlateStructs.h"
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#include "Fonts/SlateFontInfo.h"
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#include "Widgets/DeclarativeSyntaxSupport.h"
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#include "Widgets/SWidget.h"
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#include "Widgets/SCompoundWidget.h"
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#include "Widgets/Input/SButton.h"
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#include "Widgets/Views/STableViewBase.h"
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#include "Widgets/Views/STableRow.h"
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#include "Widgets/Views/STreeView.h"
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#include "EditorStyleSet.h"
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class FKeyTreeInfo;
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class SComboButton;
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DECLARE_DELEGATE_OneParam(FOnKeyChanged, TSharedPtr<FKey>)
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//////////////////////////////////////////////////////////////////////////
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// SKeySelector
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typedef TSharedPtr<FKeyTreeInfo> FKeyTreeItem;
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typedef STreeView<FKeyTreeItem> SKeyTreeView;
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/** Widget for selecting an input key */
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class UNREALED_API SKeySelector: public SCompoundWidget
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{
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public:
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SLATE_BEGIN_ARGS(SKeySelector)
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: _CurrentKey(FKey()), _TreeViewWidth(300.f), _TreeViewHeight(400.f), _Font(FEditorStyle::GetFontStyle(TEXT("NormalFont"))), _FilterBlueprintBindable(true), _AllowClear(true)
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{}
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SLATE_ATTRIBUTE(TOptional<FKey>, CurrentKey)
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SLATE_ATTRIBUTE(FOptionalSize, TreeViewWidth)
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SLATE_ATTRIBUTE(FOptionalSize, TreeViewHeight)
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SLATE_EVENT(FOnKeyChanged, OnKeyChanged)
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SLATE_ATTRIBUTE(FSlateFontInfo, Font)
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SLATE_ARGUMENT(bool, FilterBlueprintBindable)
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SLATE_ARGUMENT(bool, AllowClear)
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SLATE_END_ARGS()
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public:
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void Construct(const FArguments& InArgs);
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protected:
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/** Gets the icon for the key being manipulated */
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const FSlateBrush* GetKeyIconImage() const;
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/** Toggles the icon's color when in listen mode */
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FSlateColor GetKeyIconColor() const;
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/** Gets a succinct description for the key being manipulated */
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FText GetKeyDescription() const;
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/** Gets a tooltip for the selected key */
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FText GetKeyTooltip() const;
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/** Treeview support functions */
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virtual TSharedRef<ITableRow> GenerateKeyTreeRow(FKeyTreeItem InItem, const TSharedRef<STableViewBase>& OwnerTree);
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void OnKeySelectionChanged(FKeyTreeItem Selection, ESelectInfo::Type SelectInfo);
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void GetKeyChildren(FKeyTreeItem InItem, TArray<FKeyTreeItem>& OutChildren);
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/** Gets the Menu Content, setting it up if necessary */
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virtual TSharedRef<SWidget> GetMenuContent();
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/** Key searching support */
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void OnFilterTextChanged(const FText& NewText);
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void OnFilterTextCommitted(const FText& NewText, ETextCommit::Type CommitInfo);
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void GetSearchTokens(const FString& SearchString, TArray<FString>& OutTokens) const;
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/** Helper to generate the filtered list of keys, based on the search string matching */
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bool GetChildrenMatchingSearch(const TArray<FString>& SearchTokens, const TArray<FKeyTreeItem>& UnfilteredList, TArray<FKeyTreeItem>& OutFilteredList);
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/** Start listening for the next key press */
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FReply ListenForInput();
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/** Assigns the heard input as the current key */
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FReply ProcessHeardInput(FKey KeyHeard);
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virtual bool SupportsKeyboardFocus() const override { return bListenForNextInput; }
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/** Input listeners */
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virtual FReply OnKeyDown(const FGeometry& MyGeometry, const FKeyEvent& InKeyEvent) override;
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virtual FReply OnMouseButtonDown(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
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virtual FReply OnMouseWheel(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
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virtual FReply OnMouseMove(const FGeometry& MyGeometry, const FPointerEvent& MouseEvent) override;
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virtual FReply OnAnalogValueChanged(const FGeometry& MyGeometry, const FAnalogInputEvent& InAnalogInputEvent) override;
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/**
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* Determine the best icon to represent the given key.
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*
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* @param Key The key to get the icon for.
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* @param returns a brush that best represents the icon
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*/
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const FSlateBrush* GetIconFromKey(FKey Key) const;
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protected:
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/** Combo Button that shows current key and icon */
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TSharedPtr<SComboButton> KeyComboButton;
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/** Reference to the menu content that's displayed when the key button is clicked on */
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TSharedPtr<SWidget> MenuContent;
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TSharedPtr<SSearchBox> FilterTextBox;
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TSharedPtr<SKeyTreeView> KeyTreeView;
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FText SearchText;
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/** The key attribute that we're modifying with this widget, or an empty optional if the key contains multiple values */
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TAttribute<TOptional<FKey>> CurrentKey;
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/** Delegate that is called every time the key changes. */
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FOnKeyChanged OnKeyChanged;
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/** Desired width of the tree view widget */
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TAttribute<FOptionalSize> TreeViewWidth;
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/** Desired height of the tree view widget */
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TAttribute<FOptionalSize> TreeViewHeight;
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/** Font used for category tree entries */
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FSlateFontInfo CategoryFont;
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/** Font used for key tree entries */
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FSlateFontInfo KeyFont;
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/** Array containing the unfiltered list of all values this key could possibly have */
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TArray<FKeyTreeItem> KeyTreeRoot;
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/** Array containing a filtered list, according to the text in the searchbox */
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TArray<FKeyTreeItem> FilteredKeyTreeRoot;
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bool bListenForNextInput = false;
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};
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