Glyph.GetHitTest(Point) 方法
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
提供命中测试逻辑。
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.CursorPublic MustOverride Function GetHitTest (p As Point) As Cursor参数
- p
- Point
要进行命中测试的点。
返回
如果 Cursor 与 p 关联，则为 Glyph；否则为 null。
示例
以下示例演示如何重写 GetHitTest 该点是否在此字形中。 此代码示例是为类提供的大型示例的 BehaviorService 一部分。
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
注解
该方法GetHitTest是强制abstractGlyph实现提供命中测试逻辑的方法。 鉴于任何一点，如果 Glyph 已决定与该位置相关，则需要返回有效 Cursor。 否则，返回 null 将导致 BehaviorService 忽略位置。