Cursor.Draw(Graphics, Rectangle) 方法

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

在指定边界内、指定的表面上绘制光标。

public:
 void Draw(System::Drawing::Graphics ^ g, System::Drawing::Rectangle targetRect);

public void Draw (System.Drawing.Graphics g, System.Drawing.Rectangle targetRect);

member this.Draw : System.Drawing.Graphics * System.Drawing.Rectangle -> unit

Public Sub Draw (g As Graphics, targetRect As Rectangle)

参数

g

Graphics

要在其上绘制 Cursor 的 Graphics 表面。

targetRect

Rectangle

代表 Cursor 限定范围的 Rectangle。

示例

下面的代码示例在其正常大小和拉伸模式下绘制窗体上的指定游标，其大小为两倍。 此示例要求在调用该方法时具有一个 Form 和一个 Cursor 要传入方法的对象。

void DrawCursorsOnForm( System::Windows::Forms::Cursor^ cursor )
{
   
   // If the form's cursor is not the Hand cursor and the
   // Current cursor is the Default, Draw the specified
   // cursor on the form in normal size and twice normal size.
   if ( this->Cursor != Cursors::Hand && System::Windows::Forms::Cursor::Current == Cursors::Default )
   {
      
      // Draw the cursor stretched.
      Graphics^ graphics = this->CreateGraphics();
      Rectangle rectangle = Rectangle(Point(10,10),System::Drawing::Size( cursor->Size.Width * 2, cursor->Size.Height * 2 ));
      cursor->DrawStretched( graphics, rectangle );
      
      // Draw the cursor in normal size.
      rectangle.Location = Point(rectangle.Width + rectangle.Location.X,rectangle.Height + rectangle.Location.Y);
      rectangle.Size = cursor->Size;
      cursor->Draw( graphics, rectangle );
      
      // Dispose of the cursor.
      delete cursor;
   }
}

private void DrawCursorsOnForm(Cursor cursor)
{
   // If the form's cursor is not the Hand cursor and the 
   // Current cursor is the Default, Draw the specified 
   // cursor on the form in normal size and twice normal size.
   if(this.Cursor != Cursors.Hand & 
     Cursor.Current == Cursors.Default)
   {
      // Draw the cursor stretched.
      Graphics graphics = this.CreateGraphics();
      Rectangle rectangle = new Rectangle(
        new Point(10,10), new Size(cursor.Size.Width * 2, 
        cursor.Size.Height * 2));
      cursor.DrawStretched(graphics, rectangle);
        
      // Draw the cursor in normal size.
      rectangle.Location = new Point(
      rectangle.Width + rectangle.Location.X, 
        rectangle.Height + rectangle.Location.Y);
      rectangle.Size = cursor.Size;
      cursor.Draw(graphics, rectangle);

      // Dispose of the cursor.
      cursor.Dispose();
   }
}

Private Sub DrawCursorsOnForm(cursor As Cursor)
   ' If the form's cursor is not the Hand cursor and the 
   ' Current cursor is the Default, Draw the specified 
   ' cursor on the form in normal size and twice normal size. 
   If (Not Me.Cursor.Equals(Cursors.Hand)) And _
     Cursor.Current.Equals(Cursors.Default) Then

      ' Draw the cursor stretched.
      Dim graphics As Graphics = Me.CreateGraphics()
      Dim rectangle As New Rectangle(New Point(10, 10), _
        New Size(cursor.Size.Width * 2, cursor.Size.Height * 2))
      cursor.DrawStretched(graphics, rectangle)
     
      ' Draw the cursor in normal size.
      rectangle.Location = New Point(rectangle.Width + _
        rectangle.Location.X, rectangle.Height + rectangle.Location.Y)
      rectangle.Size = cursor.Size
      cursor.Draw(graphics, rectangle)

      ' Dispose of the cursor.
      cursor.Dispose()
   End If
End Sub

注解

绘图命令源自参数表示 g 的图形图面，但 Graphics 不包含有关如何呈现给定图像的信息，因此它将调用传递给该 Cursor图像。 该方法Draw将图像裁剪为给定维度，并允许指定绘制该Cursor图像的一个Rectangle范围。 如果要在图形图面上绘制光标，则通常使用此方法。 例如，你可能有一个对话框，允许用户从 ListBox 控件或一组 RadioButton 控件中选择游标。

另请参阅

• DrawStretched(Graphics, Rectangle)