将Pascal转换为C ++

问题描述

以下代码在firemonkey ListView的ItemClickEx事件中运行.我想知道如何在C ++中做到这一点.

The following code runs in the ItemClickEx event of a firemonkey ListView. I want to know how to do this in C++.

procedure TfrmCategory.lstListCategoryItemClickEx(const Sender: TObject; 
                         ItemIndex: Integer; const LocalClickPos: TPointF;
    const ItemObject: TListItemObject);

begin
    if ItemObject is TListItemAccessory then
     begin
      ShowMessage('Acessory clicked');
     end;

end;

来源:链接此处.

我不知道如何在c ++中执行如果ItemObject是TListItemAccessory".

I don't know how to do the "if ItemObject is TListItemAccessory" in c++.

推荐答案

与Delphi的is运算符等效的C ++是dynamic_cast，例如:

The C++ equivalent to Delphi's is operator is dynamic_cast, eg:

void __fastcall  TfrmCategory::lstListCategoryItemClickEx(const TObject *Sender,
    int ItemIndex, const TPointF &LocalClickPos, const TListItemObject* ItemObject)
{
    if (dynamic_cast<const TListItemAccessory*>(ItemObject))
        ShowMessage(L"Acessory clicked");
}

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