Question

我正在使用windowForms创建一个程序，我想用鼠标滚轮做一些事情，比如用鼠标滚轮改变图像。我一直在寻找微软网站的答案，但我无法理解。谁能给我一个关于鼠标滚轮事件和我需要使用的库的例子。

Answer 1

这是我需要使用的库

＆＃39;＃＆＃39;使用＆＃39;＆nbsp;＆nbsp;＆nbsp;＆nbsp;＆＃39;＆nbsp;＆＃39;＆＃39;

＆＃39;＃＆＃39;使用＆＃39;＆lt;＆＃;; System.Windows.Forms.dll＆＃39;＆gt;＆＃39;

＆＃39;＃＆＃39;使用＆＃39;＆lt;＆＃;; System.Drawing.dll＆＃39;＆gt;＆＃39;

public ref class mainWindow：public System :: Windows :: Forms :: Form

{

公共：

    mainWindow(void)

    {

         InitializeComponent();

       //

        //TODO: Add the constructor code here

       //
    }

//在InitializeComponent（）里面我写道：

       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);

每个函数的代码

 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();

}

代码允许滚动内容而不点击它。我想要范围的组件在面板对象内，所以我需要首先聚焦/选择面板对象。

鼠标滚轮事件滚动c ++ Visual Studio

1 个答案: