鼠标滚轮事件滚动 c++ Visual Studio

Question

我正在用 windowForms 制作一个程序，我想用鼠标滚轮做一些事情，比如用鼠标滚轮改变图像。我一直在微软网站上寻找一些答案，但我无法理解。谁能给我一个关于鼠标滚轮事件以及我需要使用哪些库的例子。

Answer 1

这是我需要使用的库

'#' 使用 '<'System.dll'>'

'#' 使用 '<'System.Windows.Forms.dll'>'

'#' 使用 '<'System.Drawing.dll'>'

public ref class 主窗口：public System::Windows::Forms::Form

{

public:

    mainWindow(void)

    {

         InitializeComponent();

       //

        //TODO: Add the constructor code here

       //
    }

//在 InitializeComponent() 中我写道：

       this->panel_album_info->MouseEnter += gcnew System::EventHandler(this,&mainWindow::panel_album_info_MouseEnter);



        this->panel_album_info->MouseWheel += gcnew System::Windows::Forms::MouseEventHandler(this, &mainWindow::panel_album_info_Mouse_Wheel);

各函数代码

 private: System::Void panel_album_info_Mouse_Wheel(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
//if (tenho_o_rato_no_panel_do_album_info == true)
//{
    int movimento = e->Delta;
    label1->Text = "teste";

    if (movimento == 120)

        numero_de_deslocações_do_album += 1;
    else if (movimento == -120)
        numero_de_deslocações_do_album -= 1;
    label1->Text = numero_de_deslocações_do_album.ToString();
//}
//else
    //return;

 }


private: System::Void panel_album_info_MouseEnter(System::Object^  sender, System::EventArgs^  e) {


this->panel_album_info->Select(); //este tambem da mas nao sei qual é a diferença
//this->panel_album_info->Focus();

}

该代码允许在不单击的情况下滚动某些内容。我想要范围的组件在面板对象内，所以我需要先 focus/select 面板对象。

鼠标滚轮事件滚动 c++ Visual Studio

mouse wheel event scroll c++ Visual Studio

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