Glyph.GetHitTest(Point) Méthode

  • Référence

Définition

Espace de noms:
System.Windows.Forms.Design.Behavior
Assembly:
System.Design.dll
Assembly:
System.Windows.Forms.Design.dll
Source:
Glyph.cs
Source:
Glyph.cs
Source:
Glyph.cs

Fournit la logique de tests de positionnement.

public:
 abstract System::Windows::Forms::Cursor ^ GetHitTest(System::Drawing::Point p);
public abstract System.Windows.Forms.Cursor GetHitTest (System.Drawing.Point p);
public abstract System.Windows.Forms.Cursor? GetHitTest (System.Drawing.Point p);
abstract member GetHitTest : System.Drawing.Point -> System.Windows.Forms.Cursor
Public MustOverride Function GetHitTest (p As Point) As Cursor

Paramètres

p
Point

Point auquel appliquer un test de positionnement.

Retours

Cursor

Cursor si le Glyph est associé au p ; sinon, null.

Exemples

L’exemple suivant montre comment remplacer le GetHitTest pour voir si le point se trouve dans ce glyphe. Cet exemple de code fait partie d’un exemple plus grand fourni pour la BehaviorService classe .

public:
    virtual Cursor^ GetHitTest(Point p) override
    {
        // GetHitTest is called to see if the point is
        // within this glyph.  This gives us a chance to decide
        // what cursor to show.  Returning null from here means
        // the mouse pointer is not currently inside of the
        // glyph.  Returning a valid cursor here indicates the
        // pointer is inside the glyph, and also enables our
        // Behavior property as the active behavior.
        if (Bounds.Contains(p))
        {
            return Cursors::Hand;
        }
        return nullptr;
    }

public override Cursor GetHitTest(Point p)
{
    // GetHitTest is called to see if the point is
    // within this glyph.  This gives us a chance to decide
    // what cursor to show.  Returning null from here means
    // the mouse pointer is not currently inside of the glyph.
    // Returning a valid cursor here indicates the pointer is
    // inside the glyph, and also enables our Behavior property
    // as the active behavior.
    if (Bounds.Contains(p))
    {
        return Cursors.Hand;
    }

    return null;
}

Public Overrides Function GetHitTest(ByVal p As Point) As Cursor
    ' GetHitTest is called to see if the point is
    ' within this glyph.  This gives us a chance to decide
    ' what cursor to show.  Returning null from here means
    ' the mouse pointer is not currently inside of the glyph.
    ' Returning a valid cursor here indicates the pointer is
    ' inside the glyph,and also enables our Behavior property
    ' as the active behavior.
    If Bounds.Contains(p) Then
        Return Cursors.Hand
    End If

    Return Nothing

End Function

Remarques

La GetHitTest méthode est une abstract méthode qui force Glyph les implémentations à fournir une logique de test d’accès. Compte tenu d’un point quelconque, si le Glyph a décidé d’être impliqué dans cet emplacement, il doit retourner un valide Cursor. Sinon, le retour null entraîne l’ignorer BehaviorService .

S’applique à

Voir aussi