PaintEventArgs Sınıf

Tanım

Paint olayı için veriler sağlar.Provides data for the Paint event.

public ref class PaintEventArgs : EventArgs, IDisposable, System::Drawing::IDeviceContext
public ref class PaintEventArgs : EventArgs, IDisposable
public class PaintEventArgs : EventArgs, IDisposable, System.Drawing.IDeviceContext
public class PaintEventArgs : EventArgs, IDisposable
type PaintEventArgs = class
    inherit EventArgs
    interface IDisposable
    interface IDeviceContext
type PaintEventArgs = class
    inherit EventArgs
    interface IDisposable
Public Class PaintEventArgs
Inherits EventArgs
Implements IDeviceContext, IDisposable
Public Class PaintEventArgs
Inherits EventArgs
Implements IDisposable
Devralma
PaintEventArgs
Türetilmiş
Uygulamalar

Örnekler

Aşağıdaki örnek, bir olayı işlemeyi Paint ve PaintEventArgs form üzerinde dikdörtgenler çizmek için sınıfını kullanmayı gösterir.The following example demonstrates handling the Paint event and using the PaintEventArgs class to draw rectangles on the form. MouseDownVe MouseUp olayları, dikdörtgenin boyutunu belirlemekte işlenir.The MouseDown and MouseUp events are handled to determine the size of the rectangle. Örnek ayrıca Invalidate dikdörtgenin alanını geçersiz kılmak için yöntemi gösterir, bu da yeniden çizilmesine neden olur.The example also demonstrates the Invalidate method to invalidate the area of the rectangle, causing it to be redrawn.

private:
   Rectangle RcDraw;
   void Form1_MouseDown( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^ e )
   {
      // Determine the initial rectangle coordinates...
      RcDraw.X = e->X;
      RcDraw.Y = e->Y;
   }

   void Form1_MouseUp( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^ e )
   {
      // Determine the width and height of the rectangle...
      if ( e->X < RcDraw.X )
      {
         RcDraw.Width = RcDraw.X - e->X;
         RcDraw.X = e->X;
      }
      else
      {
         RcDraw.Width = e->X - RcDraw.X;
      }

      if ( e->Y < RcDraw.Y )
      {
         RcDraw.Height = RcDraw.Y - e->Y;
         RcDraw.Y = e->Y;
      }
      else
      {
         RcDraw.Height = e->Y - RcDraw.Y;
      }

      // Force a repaint of the region occupied by the rectangle...
      this->Invalidate( RcDraw );
   }

   void Form1_Paint( Object^ /*sender*/, System::Windows::Forms::PaintEventArgs^ e )
   {
      // Draw the rectangle...
      float PenWidth = 5;
      e->Graphics->DrawRectangle( gcnew Pen( Color::Blue,PenWidth ), RcDraw );
   }

private Rectangle RcDraw;
private float PenWidth = 5;

private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{

    // Determine the initial rectangle coordinates...

    RcDraw.X = e.X;
    RcDraw.Y = e.Y;
}

private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{

    // Determine the width and height of the rectangle...

    if(e.X < RcDraw.X)
    {
        RcDraw.Width = RcDraw.X - e.X;
        RcDraw.X = e.X;
    }
    else
    {
        RcDraw.Width = e.X - RcDraw.X;
    }

    if(e.Y < RcDraw.Y)
    {
        RcDraw.Height = RcDraw.Y - e.Y;
        RcDraw.Y = e.Y;
    }
    else
    {
        RcDraw.Height = e.Y - RcDraw.Y;
    }

    // Force a repaint of the region occupied by the rectangle...

    this.Invalidate(RcDraw);
}

private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{

    // Draw the rectangle...

    e.Graphics.DrawRectangle(new Pen(Color.Blue, PenWidth), RcDraw);
}

Dim RcDraw As Rectangle
Dim PenWidth As Integer = 5


Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown

    ' Determine the initial rectangle coordinates...

    RcDraw.X = e.X
    RcDraw.Y = e.Y

End Sub

Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseUp

    ' Determine the width and height of the rectangle...

    If e.X < RcDraw.X Then
        RcDraw.Width = RcDraw.X - e.X
        RcDraw.X = e.X
    Else
        RcDraw.Width = e.X - RcDraw.X
    End If

    If e.Y < RcDraw.Y Then
        RcDraw.Height = RcDraw.Y - e.Y
        RcDraw.Y = e.Y
    Else
        RcDraw.Height = e.Y - RcDraw.Y
    End If

    ' Force a repaint of the region occupied by the rectangle...

    Me.Invalidate(RcDraw)

End Sub

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

    ' Draw the rectangle...

    e.Graphics.DrawRectangle(New Pen(Color.Blue, PenWidth), RcDraw)

End Sub


   // This example creates a PictureBox control on the form and draws to it.
   // This example assumes that the Form_Load event handler method is
   // connected to the Load event of the form.
private:
   PictureBox^ pictureBox1;
   void Form1_Load( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      pictureBox1 = gcnew PictureBox;

      // Dock the PictureBox to the form and set its background to white.
      pictureBox1->Dock = DockStyle::Fill;
      pictureBox1->BackColor = Color::White;

      // Connect the Paint event of the PictureBox to the event handler method.
      pictureBox1->Paint += gcnew System::Windows::Forms::PaintEventHandler( this, &Form1::pictureBox1_Paint );

      // Add the PictureBox control to the Form.
      this->Controls->Add( pictureBox1 );
   }

   void pictureBox1_Paint( Object^ /*sender*/, System::Windows::Forms::PaintEventArgs^ e )
   {
      // Create a local version of the graphics object for the PictureBox.
      Graphics^ g = e->Graphics;

      // Draw a string on the PictureBox.
      g->DrawString( "This is a diagonal line drawn on the control",
         gcnew System::Drawing::Font( "Arial",10 ), System::Drawing::Brushes::Blue, Point(30,30) );

      // Draw a line in the PictureBox.
      g->DrawLine( System::Drawing::Pens::Red, pictureBox1->Left, pictureBox1->Top,
         pictureBox1->Right, pictureBox1->Bottom );
   }
// This example creates a PictureBox control on the form and draws to it.
// This example assumes that the Form_Load event handler method is
// connected to the Load event of the form.

private PictureBox pictureBox1 = new PictureBox();
// Cache font instead of recreating font objects each time we paint.
private Font fnt = new Font("Arial",10);
private void Form1_Load(object sender, System.EventArgs e)
{
    // Dock the PictureBox to the form and set its background to white.
    pictureBox1.Dock = DockStyle.Fill;
    pictureBox1.BackColor = Color.White;
    // Connect the Paint event of the PictureBox to the event handler method.
    pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);

    // Add the PictureBox control to the Form.
    this.Controls.Add(pictureBox1);
}

private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
    // Create a local version of the graphics object for the PictureBox.
    Graphics g = e.Graphics;

    // Draw a string on the PictureBox.
    g.DrawString("This is a diagonal line drawn on the control",
        fnt, System.Drawing.Brushes.Blue, new Point(30,30));
    // Draw a line in the PictureBox.
    g.DrawLine(System.Drawing.Pens.Red, pictureBox1.Left, pictureBox1.Top,
        pictureBox1.Right, pictureBox1.Bottom);
}
' This example creates a PictureBox control on the form and draws to it. 
' This example assumes that the Form_Load event handler method is connected 
' to the Load event of the form.
Private pictureBox1 As New PictureBox()
Private fnt as New Font("Arial", 10)

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
    ' Dock the PictureBox to the form and set its background to white.
    pictureBox1.Dock = DockStyle.Fill
    pictureBox1.BackColor = Color.White
    ' Connect the Paint event of the PictureBox to the event handler method.
    AddHandler pictureBox1.Paint, AddressOf Me.pictureBox1_Paint

    ' Add the PictureBox control to the Form.
    Me.Controls.Add(pictureBox1)
End Sub


Private Sub pictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs)
    ' Create a local version of the graphics object for the PictureBox.
    Dim g As Graphics = e.Graphics

    ' Draw a string on the PictureBox.
    g.DrawString("This is a diagonal line drawn on the control", _
        fnt, Brushes.Red, New PointF(30.0F, 30.0F))
    ' Draw a line in the PictureBox.
    g.DrawLine(System.Drawing.Pens.Red, pictureBox1.Left, _ 
        pictureBox1.Top, pictureBox1.Right, pictureBox1.Bottom)
End Sub

Açıklamalar

PaintBir denetim yeniden çizilmediğinde olay oluşur.The Paint event occurs when a control is redrawn. Bir PaintEventArgs , Graphics denetimi boyamak için ve içinde boyamak için kullanılacak öğesini belirtir ClipRectangle .A PaintEventArgs specifies the Graphics to use to paint the control and the ClipRectangle in which to paint.

Olay modeli hakkında daha fazla bilgi için bkz. olayları işleme veoluşturma.For information about the event model, see Handling and Raising Events.

Oluşturucular

PaintEventArgs(Graphics, Rectangle)

PaintEventArgsBelirtilen grafik ve kırpma dikdörtgeniyle sınıfın yeni bir örneğini başlatır.Initializes a new instance of the PaintEventArgs class with the specified graphics and clipping rectangle.

Özellikler

ClipRectangle

Boyamak için dikdörtgeni alır.Gets the rectangle in which to paint.

Graphics

Boyamak için kullanılan grafikleri alır.Gets the graphics used to paint.

Yöntemler

Dispose()

PaintEventArgs tarafından kullanılan tüm kaynakları serbest bırakır.Releases all resources used by the PaintEventArgs.

Dispose(Boolean)

PaintEventArgs tarafından kullanılan yönetilmeyen kaynakları serbest bırakır ve yönetilen kaynakları isteğe bağlı olarak serbest bırakır.Releases the unmanaged resources used by the PaintEventArgs and optionally releases the managed resources.

Equals(Object)

Belirtilen nesnenin geçerli nesneye eşit olup olmadığını belirler.Determines whether the specified object is equal to the current object.

(Devralındığı yer: Object)
Finalize()

Bir nesnenin çöp toplama tarafından geri alınmadan önce kaynakları serbest bırakma ve diğer temizleme işlemlerini gerçekleştirmesine izin verir.Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.

GetHashCode()

Varsayılan karma işlevi olarak işlev görür.Serves as the default hash function.

(Devralındığı yer: Object)
GetType()

TypeGeçerli örneği alır.Gets the Type of the current instance.

(Devralındığı yer: Object)
MemberwiseClone()

Geçerli bir basit kopyasını oluşturur Object .Creates a shallow copy of the current Object.

(Devralındığı yer: Object)
ToString()

Geçerli nesneyi temsil eden dizeyi döndürür.Returns a string that represents the current object.

(Devralındığı yer: Object)

Belirtik Arabirim Kullanımları

IDeviceContext.GetHdc()

Windows cihaz bağlamına olan tanıtıcıyı döndürür.Returns the handle to a Windows device context.

IDeviceContext.ReleaseHdc()

Bir Windows cihaz bağlamı tanıtıcısını yayınlar.Releases the handle of a Windows device context.

Şunlara uygulanır

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