STextComboBox.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "Layout/Margin.h"
#include "Styling/SlateColor.h"
#include "Fonts/SlateFontInfo.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Widgets/SWidget.h"
#include "Widgets/SCompoundWidget.h"
#include "Styling/SlateTypes.h"
#include "Styling/CoreStyle.h"
#include "Framework/SlateDelegates.h"
#include "Widgets/Input/SComboBox.h"
 
class STextComboBox : public SCompoundWidget
{
public:
 
    DECLARE_DELEGATE_RetVal_OneParam( FString, FGetTextComboLabel, TSharedPtr<FString> );
    typedef TSlateDelegates< TSharedPtr<FString> >::FOnSelectionChanged FOnTextSelectionChanged;
 
    SLATE_BEGIN_ARGS( STextComboBox )
        : _ComboBoxStyle(&FCoreStyle::Get().GetWidgetStyle< FComboBoxStyle >("ComboBox"))
        , _ButtonStyle(nullptr)
        , _ColorAndOpacity( FSlateColor::UseForeground() )
        , _ContentPadding(_ComboBoxStyle->ContentPadding)
        , _OnGetTextLabelForItem()
        {}
 
        SLATE_STYLE_ARGUMENT(FComboBoxStyle, ComboBoxStyle)
 
        
        SLATE_STYLE_ARGUMENT(FButtonStyle, ButtonStyle)
 
        
        SLATE_ITEMS_SOURCE_ARGUMENT(TSharedPtr<FString>, OptionsSource)
 
        
        SLATE_ATTRIBUTE( FSlateColor, ColorAndOpacity )
 
        
        SLATE_ATTRIBUTE(FSlateFontInfo, Font)
 
        
        SLATE_ATTRIBUTE( FMargin, ContentPadding )
 
        
        SLATE_EVENT( FOnTextSelectionChanged, OnSelectionChanged)
 
        
        SLATE_EVENT( FOnComboBoxOpening, OnComboBoxOpening )
 
        
        SLATE_ARGUMENT( TSharedPtr<FString>, InitiallySelectedItem )
 
        
        SLATE_EVENT( FGetTextComboLabel, OnGetTextLabelForItem ) 
    SLATE_END_ARGS()
 
    SLATE_API void Construct( const FArguments& InArgs );
 
    SLATE_API TSharedRef<SWidget> MakeItemWidget( TSharedPtr<FString> StringItem );
 
    SLATE_API void SetSelectedItem (TSharedPtr<FString> NewSelection);
 
    TSharedPtr<FString> GetSelectedItem()
    {
        return SelectedItem;
    }
 
    void SetItemsSource(const TArray<TSharedPtr<FString>>* InListItemsSource)
    {
        StringCombo->SetItemsSource(InListItemsSource);
    }
 
    void SetItemsSource(TSharedRef<::UE::Slate::Containers::TObservableArray<TSharedPtr<FString>>> InListItemsSource)
    {
        StringCombo->SetItemsSource(InListItemsSource);
    }
 
    void ClearItemsSource()
    {
        StringCombo->ClearItemsSource();
    }
 
    void SetStyle(const FComboBoxStyle* InComboStyle)
    {
        StringCombo->SetStyle(InComboStyle);
    }
 
    bool IsOpen() const
    {
        return StringCombo->IsOpen();
    }
 
    SLATE_API void RefreshOptions();
 
    SLATE_API void ClearSelection();
 
private:
    TSharedPtr<FString> OnGetSelection() const {return SelectedItem;}
 
    SLATE_API void OnSelectionChanged (TSharedPtr<FString> Selection, ESelectInfo::Type SelectInfo);
 
    SLATE_API FText GetSelectedTextLabel() const;
 
    SLATE_API FText GetItemTextLabel(TSharedPtr<FString> StringItem) const;
 
private:
 
    FGetTextComboLabel GetTextLabelForItem;
 
    TSharedPtr<FString> SelectedItem;
 
    TArray< TSharedPtr<FString> >       Strings;
 
    TSharedPtr< SComboBox< TSharedPtr<FString> > >  StringCombo;
 
    FOnTextSelectionChanged SelectionChanged;
 
    TAttribute< FSlateFontInfo > Font;
};