Control.CursorChanged Событие

Определение

Происходит при изменении значения свойства Cursor.Occurs when the value of the Cursor property changes.

public:
 event EventHandler ^ CursorChanged;
public event EventHandler CursorChanged;
member this.CursorChanged : EventHandler 
Public Custom Event CursorChanged As EventHandler 

Примеры

В следующем примере кода показано изменение курсора мыши с помощью свойства Control.Cursor, класса Cursor и класса Cursors.The following code example demonstrates changing the mouse cursor using the Control.Cursor property, the Cursor class, and the Cursors class. В примере создается форма, содержащая элемент управления ComboBox, Panel элемент управления и элемент управления ListView.The example creates a form that contains a ComboBox control, a Panel control, and a ListView control. ComboBox содержит все курсоры, предоставляемые классом Cursors.The ComboBox contains all cursors provided by the Cursors class. Когда пользователь выбирает курсор мыши в ComboBox, свойству Control.Cursor присваивается выбранный курсор, который обновляет курсор для Panel.When the user selects a mouse cursor in the ComboBox, the Control.Cursor property is set to the selected cursor, which updates the cursor for the Panel. ListView обновляется каждый раз при возникновении события Control.CursorChanged.The ListView is updated every time the Control.CursorChanged event occurs.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

namespace MCursor
{
   public ref class Form1: public System::Windows::Forms::Form
   {
   private:
      System::Windows::Forms::ComboBox^ cursorSelectionComboBox;
      System::Windows::Forms::Panel^ testPanel;
      System::Windows::Forms::Label ^ label1;
      System::Windows::Forms::Label ^ label2;
      System::Windows::Forms::ListView^ cursorEventViewer;
      System::Windows::Forms::Label ^ label3;

   public:
      Form1()
      {
         this->cursorSelectionComboBox = gcnew System::Windows::Forms::ComboBox;
         this->testPanel = gcnew System::Windows::Forms::Panel;
         this->label1 = gcnew System::Windows::Forms::Label;
         this->label2 = gcnew System::Windows::Forms::Label;
         this->cursorEventViewer = gcnew System::Windows::Forms::ListView;
         this->label3 = gcnew System::Windows::Forms::Label;
         
         // Select Cursor Label
         this->label2->Location = System::Drawing::Point( 24, 16 );
         this->label2->Size = System::Drawing::Size( 80, 16 );
         this->label2->Text = "Select cursor:";
         
         // Cursor Testing Panel Label
         this->label1->Location = System::Drawing::Point( 24, 80 );
         this->label1->Size = System::Drawing::Size( 144, 23 );
         this->label1->Text = "Cursor testing panel:";
         
         // Cursor Changed Events Label
         this->label3->Location = System::Drawing::Point( 184, 16 );
         this->label3->Size = System::Drawing::Size( 128, 16 );
         this->label3->Text = "Cursor changed events:";
         
         // Cursor Selection ComboBox
         this->cursorSelectionComboBox->Location = System::Drawing::Point( 24, 40 );
         this->cursorSelectionComboBox->Size = System::Drawing::Size( 152, 21 );
         this->cursorSelectionComboBox->TabIndex = 0;
         this->cursorSelectionComboBox->SelectedIndexChanged += gcnew System::EventHandler( this, &Form1::cursorSelectionComboBox_SelectedIndexChanged );
         
         // Cursor Test Panel
         this->testPanel->BackColor = System::Drawing::SystemColors::ControlDark;
         this->testPanel->Location = System::Drawing::Point( 24, 104 );
         this->testPanel->Size = System::Drawing::Size( 152, 160 );
         this->testPanel->CursorChanged += gcnew System::EventHandler( this, &Form1::testPanel_CursorChanged );
         
         // Cursor Event ListView
         this->cursorEventViewer->Location = System::Drawing::Point( 184, 40 );
         this->cursorEventViewer->Size = System::Drawing::Size( 256, 224 );
         this->cursorEventViewer->TabIndex = 4;
         this->cursorEventViewer->View = System::Windows::Forms::View::List;
         
         // Set up how the form should be displayed and add the controls to the form.
         this->ClientSize = System::Drawing::Size( 456, 286 );
         array<System::Windows::Forms::Control^>^temp0 = {this->label3,this->cursorEventViewer,this->label2,this->label1,this->testPanel,this->cursorSelectionComboBox};
         this->Controls->AddRange( temp0 );
         this->Text = "Cursors Example";
         
         // Add all the cursor types to the combobox.
         System::Collections::IEnumerator^ myEnum = CursorList()->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            System::Windows::Forms::Cursor^ cursor = safe_cast<System::Windows::Forms::Cursor^>(myEnum->Current);
            cursorSelectionComboBox->Items->Add( cursor );
         }
      }


   private:
      array<System::Windows::Forms::Cursor^>^ CursorList()
      {
         
         // Make an array of all the types of cursors in Windows Forms.
         array<System::Windows::Forms::Cursor^>^temp1 = {Cursors::AppStarting,Cursors::Arrow,Cursors::Cross,Cursors::Default,Cursors::Hand,Cursors::Help,Cursors::HSplit,Cursors::IBeam,Cursors::No,Cursors::NoMove2D,Cursors::NoMoveHoriz,Cursors::NoMoveVert,Cursors::PanEast,Cursors::PanNE,Cursors::PanNorth,Cursors::PanNW,Cursors::PanSE,Cursors::PanSouth,Cursors::PanSW,Cursors::PanWest,Cursors::SizeAll,Cursors::SizeNESW,Cursors::SizeNS,Cursors::SizeNWSE,Cursors::SizeWE,Cursors::UpArrow,Cursors::VSplit,Cursors::WaitCursor};
         return temp1;
      }

      void cursorSelectionComboBox_SelectedIndexChanged( Object^ /*sender*/, System::EventArgs^ /*e*/ )
      {
         
         // Set the cursor in the test panel to be the selected cursor style.
         testPanel->Cursor = dynamic_cast<System::Windows::Forms::Cursor^>(cursorSelectionComboBox->SelectedItem);
      }

      void testPanel_CursorChanged( Object^ sender, System::EventArgs^ /*e*/ )
      {
         
         // Build up a String* containing the type of Object* sending the event, and the event.
         String^ cursorEvent = String::Format( "[{0}]: {1}", sender->GetType(), "Cursor changed" );
         
         // Record this event in the list view.
         this->cursorEventViewer->Items->Add( cursorEvent );
      }

   };

}


[STAThread]
int main()
{
   Application::Run( gcnew MCursor::Form1 );
}

using System;
using System.Drawing;
using System.Windows.Forms;

namespace MCursor
{
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.ComboBox cursorSelectionComboBox;

        private System.Windows.Forms.Panel testPanel;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.ListView cursorEventViewer;
        private System.Windows.Forms.Label label3;
        
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        public Form1()
        {
            this.cursorSelectionComboBox = new System.Windows.Forms.ComboBox();
            this.testPanel = new System.Windows.Forms.Panel();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.cursorEventViewer = new System.Windows.Forms.ListView();
            this.label3 = new System.Windows.Forms.Label();

            // Select Cursor Label
            this.label2.Location = new System.Drawing.Point(24, 16);
            this.label2.Size = new System.Drawing.Size(80, 16);
            this.label2.Text = "Select cursor:";

            // Cursor Testing Panel Label
            this.label1.Location = new System.Drawing.Point(24, 80);
            this.label1.Size = new System.Drawing.Size(144, 23);
            this.label1.Text = "Cursor testing panel:";

            // Cursor Changed Events Label
            this.label3.Location = new System.Drawing.Point(184, 16);
            this.label3.Size = new System.Drawing.Size(128, 16);
            this.label3.Text = "Cursor changed events:";
            
            // Cursor Selection ComboBox
            this.cursorSelectionComboBox.Location = new System.Drawing.Point(24, 40);
            this.cursorSelectionComboBox.Size = new System.Drawing.Size(152, 21);
            this.cursorSelectionComboBox.TabIndex = 0;
            this.cursorSelectionComboBox.SelectedIndexChanged += 
                 new System.EventHandler(this.cursorSelectionComboBox_SelectedIndexChanged);

            // Cursor Test Panel
            this.testPanel.BackColor = System.Drawing.SystemColors.ControlDark;
            this.testPanel.Location = new System.Drawing.Point(24, 104);
            this.testPanel.Size = new System.Drawing.Size(152, 160);
            this.testPanel.CursorChanged += new System.EventHandler(this.testPanel_CursorChanged);

            // Cursor Event ListView
            this.cursorEventViewer.Location = new System.Drawing.Point(184, 40);
            this.cursorEventViewer.Size = new System.Drawing.Size(256, 224);
            this.cursorEventViewer.TabIndex = 4;
            this.cursorEventViewer.View = System.Windows.Forms.View.List;

            // Set up how the form should be displayed and add the controls to the form.
            this.ClientSize = new System.Drawing.Size(456, 286);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                        this.label3, this.cursorEventViewer,
                                        this.label2, this.label1,
                                        this.testPanel, this.cursorSelectionComboBox});

            this.Text = "Cursors Example";

            // Add all the cursor types to the combobox.
            foreach (Cursor cursor in CursorList())
            {
                cursorSelectionComboBox.Items.Add(cursor);
            }
        
        }

        private Cursor [] CursorList()
        {

            // Make an array of all the types of cursors in Windows Forms.
            return new Cursor [] {
                                     Cursors.AppStarting, Cursors.Arrow, Cursors.Cross,
                                     Cursors.Default, Cursors.Hand, Cursors.Help,
                                     Cursors.HSplit, Cursors.IBeam, Cursors.No,
                                     Cursors.NoMove2D, Cursors.NoMoveHoriz, Cursors.NoMoveVert,
                                     Cursors.PanEast, Cursors.PanNE, Cursors.PanNorth,
                                     Cursors.PanNW, Cursors.PanSE, Cursors.PanSouth,
                                     Cursors.PanSW, Cursors.PanWest, Cursors.SizeAll,
                                     Cursors.SizeNESW, Cursors.SizeNS, Cursors.SizeNWSE,
                                     Cursors.SizeWE, Cursors.UpArrow, Cursors.VSplit, Cursors.WaitCursor};

        }

        private void cursorSelectionComboBox_SelectedIndexChanged(object sender, System.EventArgs e)
        {
            // Set the cursor in the test panel to be the selected cursor style.
            testPanel.Cursor = (Cursor)cursorSelectionComboBox.SelectedItem;
        }

        private void testPanel_CursorChanged(object sender, System.EventArgs e)
        {
            // Build up a string containing the type of object sending the event, and the event.
            string cursorEvent = string.Format("[{0}]: {1}", sender.GetType().ToString(), "Cursor changed");                
        
            // Record this event in the list view.
            this.cursorEventViewer.Items.Add(cursorEvent);
        }
    }
}
Imports System.Drawing
Imports System.Windows.Forms

Namespace MCursor
    
    ' Summary description for Form1.
    Public NotInheritable Class Form1
        Inherits System.Windows.Forms.Form

        Friend WithEvents cursorSelectionComboBox As System.Windows.Forms.ComboBox
        Friend WithEvents testPanel As System.Windows.Forms.Panel

        Private label1 As System.Windows.Forms.Label
        Private label2 As System.Windows.Forms.Label
        Private cursorEventViewer As System.Windows.Forms.ListView
        Private label3 As System.Windows.Forms.Label

        <System.STAThread()> _
        Public Shared Sub Main()
            System.Windows.Forms.Application.Run(New Form1)
        End Sub

        Public Sub New()

            Me.cursorSelectionComboBox = New System.Windows.Forms.ComboBox
            Me.testPanel = New System.Windows.Forms.Panel
            Me.label1 = New System.Windows.Forms.Label
            Me.label2 = New System.Windows.Forms.Label
            Me.cursorEventViewer = New System.Windows.Forms.ListView
            Me.label3 = New System.Windows.Forms.Label

            ' Select Cursor Label
            Me.label2.Location = New System.Drawing.Point(24, 16)
            Me.label2.Size = New System.Drawing.Size(80, 16)
            Me.label2.Text = "Select cursor:"            '

            ' Cursor Testing Panel Label
            Me.label1.Location = New System.Drawing.Point(24, 80)
            Me.label1.Size = New System.Drawing.Size(144, 23)
            Me.label1.Text = "Cursor testing panel:"

            ' Cursor Changed Events Label
            Me.label3.Location = New System.Drawing.Point(184, 16)
            Me.label3.Size = New System.Drawing.Size(128, 16)
            Me.label3.Text = "Cursor changed events:"

            ' Cursor Selection ComboBox
            Me.cursorSelectionComboBox.Location = New System.Drawing.Point(24, 40)
            Me.cursorSelectionComboBox.Size = New System.Drawing.Size(152, 21)
            Me.cursorSelectionComboBox.TabIndex = 0

            ' Cursor Test Panel
            Me.testPanel.BackColor = System.Drawing.SystemColors.ControlDark
            Me.testPanel.Location = New System.Drawing.Point(24, 104)
            Me.testPanel.Size = New System.Drawing.Size(152, 160)

            ' Cursor Event ListView
            Me.cursorEventViewer.Location = New System.Drawing.Point(184, 40)
            Me.cursorEventViewer.Size = New System.Drawing.Size(256, 224)
            Me.cursorEventViewer.TabIndex = 4
            Me.cursorEventViewer.View = System.Windows.Forms.View.List

            ' Set up how the form should be displayed and add the controls to the form.
            Me.ClientSize = New System.Drawing.Size(456, 286)
            Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.label3, _
                                    Me.cursorEventViewer, Me.label2, Me.label1, _
                                    Me.testPanel, Me.cursorSelectionComboBox})

            Me.Text = "Cursors Example"

            ' Add all the cursor types to the combobox.
            Dim cursor As Cursor
            For Each cursor In CursorList()
                cursorSelectionComboBox.Items.Add(cursor)
            Next cursor
        End Sub

        Private Function CursorList() As Cursor()
            ' Make an array of all the types of cursors in Windows Forms.
            return New Cursor() {Cursors.AppStarting, Cursors.Arrow, Cursors.Cross, _
                                 Cursors.Default, Cursors.Hand, Cursors.Help, _
                                 Cursors.HSplit, Cursors.IBeam, Cursors.No, _
                                 Cursors.NoMove2D, Cursors.NoMoveHoriz, Cursors.NoMoveVert, _
                                 Cursors.PanEast, Cursors.PanNE, Cursors.PanNorth, _
                                 Cursors.PanNW, Cursors.PanSE, Cursors.PanSouth, _
                                 Cursors.PanSW, Cursors.PanWest, Cursors.SizeAll, _
                                 Cursors.SizeNESW, Cursors.SizeNS, Cursors.SizeNWSE, _
                                 Cursors.SizeWE, Cursors.UpArrow, Cursors.VSplit, Cursors.WaitCursor}
        End Function

        Private Sub cursorSelectionComboBox_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cursorSelectionComboBox.SelectedIndexChanged
            ' Set the cursor in the test panel to be the selected cursor style.
            testPanel.Cursor = CType(cursorSelectionComboBox.SelectedItem, Cursor)

        End Sub 

        Private Sub testPanel_CursorChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles testPanel.CursorChanged
            ' Build up a string containing the type of object sending the event, and the event.
            Dim cursorEvent As String = String.Format("[{0}]: {1}", sender.GetType().ToString(), "Cursor changed")

            ' Records this event in the list view.
            Me.cursorEventViewer.Items.Add(cursorEvent)

        End Sub 

    End Class
End Namespace 'MCursor

Комментарии

Это событие возникает, если свойство Cursor изменено программным изменением или взаимодействием с пользователем.This event is raised if the Cursor property is changed by either a programmatic modification or user interaction.

Дополнительные сведения об обработке событий см. в разделе обработка и вызов событий.For more information about handling events, see Handling and Raising Events.

Применяется к

Дополнительно