# InlineEditConditionToggle

- **功能描述：** 使这个bool属性在被用作EditCondition的时候内联到对方的属性行里成为一个单选框，而不是自己成为一个编辑行。
- **使用位置：** UPROPERTY
- **元数据类型：** bool
- **限制类型：** bool
- **关联项：** [EditCondition](../EditCondition/EditCondition.md)
- **常用程度：** ★★★★★

使这个bool属性在被用作EditCondition的时候内联到对方的属性行里成为一个单选框，而不是自己成为一个编辑行。

虽然EditCondition支持别的类型属性或者是表达式，但是这个InlineEditConditionToggle只支持bool属性。

## 测试代码：

```cpp
public:
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = InlineEditConditionToggle, meta = (InlineEditConditionToggle))
	bool MyBool_Inline;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = InlineEditConditionToggle, meta = (EditCondition = "MyBool_Inline"))
	int32 MyInt_EditCondition_UseInline = 123;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = InlineEditConditionToggle)
	int32 MyThirdInt_Inline = 123;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = InlineEditConditionToggle, meta = (EditCondition = "MyThirdInt_Inline>200"))
	int32 MyInt_EditConditionExpression_UseInline = 123;
```

## 测试效果：

可见MyBool_Inline变成了单选框。而MyThirdInt_Inline就没有被隐藏掉。

![InlineEditConditionToggle](InlineEditConditionToggle.gif)

## 原理：

可以看到用这个判断是否支持出现单选框。

```cpp

bool FPropertyNode::SupportsEditConditionToggle() const
{
	if (!Property.IsValid())
	{
		return false;
	}

	FProperty* MyProperty = Property.Get();

	static const FName Name_HideEditConditionToggle("HideEditConditionToggle");
	if (EditConditionExpression.IsValid() && !Property->HasMetaData(Name_HideEditConditionToggle))
	{
		const FBoolProperty* ConditionalProperty = EditConditionContext->GetSingleBoolProperty(EditConditionExpression);
		if (ConditionalProperty != nullptr)
		{
			// There are 2 valid states for inline edit conditions:
			// 1. The property is marked as editable and has InlineEditConditionToggle set. 
			// 2. The property is not marked as editable and does not have InlineEditConditionToggle set.
			// In both cases, the original property will be hidden and only show up as a toggle.

			static const FName Name_InlineEditConditionToggle("InlineEditConditionToggle");
			const bool bIsInlineEditCondition = ConditionalProperty->HasMetaData(Name_InlineEditConditionToggle);
			const bool bIsEditable = ConditionalProperty->HasAllPropertyFlags(CPF_Edit);

			if (bIsInlineEditCondition == bIsEditable)
			{
				return true;
			}

			if (bIsInlineEditCondition && !bIsEditable)
			{
				UE_LOG(LogPropertyNode, Warning, TEXT("Property being used as inline edit condition is not editable, but has redundant InlineEditConditionToggle flag. Field \"%s\" in class \"%s\"."), *ConditionalProperty->GetNameCPP(), *Property->GetOwnerStruct()->GetName());
				return true;
			}

			// The property is already shown, and not marked as inline edit condition.
			if (!bIsInlineEditCondition && bIsEditable)
			{
				return false;
			}
		}
	}

	return false;
}
```