Control.OnMouseMove(MouseEventArgs) Méthode

Définition

Déclenche l'événement MouseMove.Raises the MouseMove event.

protected:
 virtual void OnMouseMove(System::Windows::Forms::MouseEventArgs ^ e);
protected virtual void OnMouseMove (System.Windows.Forms.MouseEventArgs e);
abstract member OnMouseMove : System.Windows.Forms.MouseEventArgs -> unit
override this.OnMouseMove : System.Windows.Forms.MouseEventArgs -> unit
Protected Overridable Sub OnMouseMove (e As MouseEventArgs)

Paramètres

e
MouseEventArgs

MouseEventArgs qui contient les données d'événement.A MouseEventArgs that contains the event data.

Exemples

L’exemple de code suivant montre comment substituer les méthodes OnMouseHover et OnMouseMove dans une classe dérivée.The following code example demonstrates how to override the OnMouseHover and OnMouseMove methods in a derived class. Pour exécuter l’exemple, collez le code suivant dans un nouveau formulaire et collez cette classe, en formant le même fichier, après le formulaire.To run the example, paste the following code in a new form and paste this class, forming the same file, after the form. Ajoutez un bouton de type FunButton au formulaire.Add a button of type FunButton to the form.

// To use this example create a new form and paste this class 
// forming the same file, after the form class in the same file.  
// Add a button of type FunButton to the form. 
public ref class FunButton: public Button
{
protected:
   virtual void OnMouseHover( System::EventArgs^ e ) override
   {
      
      // Get the font size in Points, add one to the
      // size, and reset the button's font to the larger
      // size.
      float fontSize = Font->SizeInPoints;
      fontSize += 1;
      System::Drawing::Size buttonSize = Size;
      this->Font = gcnew System::Drawing::Font( Font->FontFamily,fontSize,Font->Style );
      
      // Increase the size width and height of the button 
      // by 5 points each.
      Size = System::Drawing::Size( Size.Width + 5, Size.Height + 5 );
      
      // Call myBase.OnMouseHover to activate the delegate.
      Button::OnMouseHover( e );
   }

   virtual void OnMouseMove( MouseEventArgs^ e ) override
   {
      
      // Make the cursor the Hand cursor when the mouse moves 
      // over the button.
      Cursor = Cursors::Hand;
      
      // Call MyBase.OnMouseMove to activate the delegate.
      Button::OnMouseMove( e );
   }
public class FunButton:
    Button

{
    protected override void OnMouseHover(System.EventArgs e)
    {

        // Get the font size in Points, add one to the
        // size, and reset the button's font to the larger
        // size.
        float fontSize = Font.SizeInPoints;
        fontSize += 1;
        System.Drawing.Size buttonSize = Size;
        this.Font = new System.Drawing.Font(
            Font.FontFamily, fontSize, Font.Style);

        // Increase the size width and height of the button 
        // by 5 points each.
        Size = new System.Drawing.Size(Size.Width+5, Size.Height+5);

        // Call myBase.OnMouseHover to activate the delegate.
        base.OnMouseHover(e);
    }

    protected override void OnMouseMove(MouseEventArgs e)
    {

        // Make the cursor the Hand cursor when the mouse moves 
        // over the button.
        Cursor = Cursors.Hand;

        // Call MyBase.OnMouseMove to activate the delegate.
        base.OnMouseMove(e);
    }
Public Class FunButton
    Inherits Button

    Protected Overrides Sub OnMouseHover(ByVal e As System.EventArgs)

        ' Get the font size in Points, add one to the
        ' size, and reset the button's font to the larger
        ' size.
        Dim fontSize As Single = Font.SizeInPoints
        fontSize += 1
        Dim buttonSize As System.Drawing.Size = Size
        Me.Font = New System.Drawing.Font _
            (Font.FontFamily, fontSize, Font.Style)

        ' Increase the size width and height of the button 
        ' by 5 points each.
        Size = New System.Drawing.Size _
            (Size.Width + 5, Size.Height + 5)

        ' Call myBase.OnMouseHover to activate the delegate.
        MyBase.OnMouseHover(e)
    End Sub

    Protected Overrides Sub OnMouseMove(ByVal e As MouseEventArgs)

        ' Make the cursor the Hand cursor when the mouse moves 
        ' over the button.
        Cursor = Cursors.Hand

        ' Call MyBase.OnMouseMove to activate the delegate.
        MyBase.OnMouseMove(e)
    End Sub

Remarques

Le déclenchement d'un événement appelle le gestionnaire des événements par l'intermédiaire d'un délégué.Raising an event invokes the event handler through a delegate. Pour plus d’informations, consultez gestion et déclenchement d’événements.For more information, see Handling and Raising Events.

La méthode OnMouseMove permet également aux classes dérivées de gérer l'événement sans y attacher de délégué.The OnMouseMove method also allows derived classes to handle the event without attaching a delegate. Il s'agit de la méthode recommandée pour gérer l'événement dans une classe dérivée.This is the preferred technique for handling the event in a derived class.

Notes pour les héritiers

Lors de la substitution de OnMouseMove(MouseEventArgs) dans une classe dérivée, veillez à appeler la méthode OnMouseMove(MouseEventArgs) de la classe de base de manière à ce que les délégués inscrits reçoivent l'événement.When overriding OnMouseMove(MouseEventArgs) in a derived class, be sure to call the base class's OnMouseMove(MouseEventArgs) method so that registered delegates receive the event.

S’applique à

Voir aussi