ToolStripItemRenderEventArgs ToolStripItemRenderEventArgs ToolStripItemRenderEventArgs ToolStripItemRenderEventArgs Class

Definición

Proporciona los datos para los eventos que procesan el fondo de objetos derivados de ToolStripItem en la clase ToolStripRenderer.Provides data for the events that render the background of objects derived from ToolStripItem in the ToolStripRenderer class.

public ref class ToolStripItemRenderEventArgs : EventArgs
public class ToolStripItemRenderEventArgs : EventArgs
type ToolStripItemRenderEventArgs = class
    inherit EventArgs
Public Class ToolStripItemRenderEventArgs
Inherits EventArgs
Herencia
ToolStripItemRenderEventArgsToolStripItemRenderEventArgsToolStripItemRenderEventArgsToolStripItemRenderEventArgs
Derivado

Ejemplos

En el ejemplo de código siguiente se muestra cómo invalidar el OnRenderButtonBackground método para dibujar un borde alrededor de un ToolStripButton del control Image.The following code example demonstrates how to override the OnRenderButtonBackground method to draw a border around a ToolStripButton control's Image. Este ejemplo de código forma parte de un ejemplo más extenso proporcionado para el ToolStripRenderer clase.This code example is part of a larger example provided for the ToolStripRenderer class.

// This method draws a border around the button's image. If the background
// to be rendered belongs to the empty cell, a string is drawn. Otherwise,
// a border is drawn at the edges of the button.
protected override void OnRenderButtonBackground(
    ToolStripItemRenderEventArgs e)
{
    base.OnRenderButtonBackground(e);

    // Define some local variables for convenience.
    Graphics g = e.Graphics;
    GridStrip gs = e.ToolStrip as GridStrip;
    ToolStripButton gsb = e.Item as ToolStripButton;

    // Calculate the rectangle around which the border is painted.
    Rectangle imageRectangle = new Rectangle(
        borderThickness, 
        borderThickness, 
        e.Item.Width - 2 * borderThickness, 
        e.Item.Height - 2 * borderThickness);

    // If rendering the empty cell background, draw an 
    // explanatory string, centered in the ToolStripButton.
    if (gsb == gs.EmptyCell)
    {
        e.Graphics.DrawString(
            "Drag to here",
            gsb.Font, 
            SystemBrushes.ControlDarkDark,
            imageRectangle, style);
    }
    else
    {
        // If the button can be a drag source, paint its border red.
        // otherwise, paint its border a dark color.
        Brush b = gs.IsValidDragSource(gsb) ? b = 
            Brushes.Red : SystemBrushes.ControlDarkDark;

        // Draw the top segment of the border.
        Rectangle borderSegment = new Rectangle(
            0, 
            0, 
            e.Item.Width, 
            imageRectangle.Top);
        g.FillRectangle(b, borderSegment);

        // Draw the right segment.
        borderSegment = new Rectangle(
            imageRectangle.Right,
            0,
            e.Item.Bounds.Right - imageRectangle.Right,
            imageRectangle.Bottom);
        g.FillRectangle(b, borderSegment);

        // Draw the left segment.
        borderSegment = new Rectangle(
            0,
            0,
            imageRectangle.Left,
            e.Item.Height);
        g.FillRectangle(b, borderSegment);

        // Draw the bottom segment.
        borderSegment = new Rectangle(
            0,
            imageRectangle.Bottom,
            e.Item.Width,
            e.Item.Bounds.Bottom - imageRectangle.Bottom);
        g.FillRectangle(b, borderSegment);
    }
}
  ' This method draws a border around the button's image. If the background
  ' to be rendered belongs to the empty cell, a string is drawn. Otherwise,
  ' a border is drawn at the edges of the button.
  Protected Overrides Sub OnRenderButtonBackground(e As ToolStripItemRenderEventArgs)
     MyBase.OnRenderButtonBackground(e)
     
     ' Define some local variables for convenience.
     Dim g As Graphics = e.Graphics
     Dim gs As GridStrip = e.ToolStrip 
     Dim gsb As ToolStripButton = e.Item 
     
     ' Calculate the rectangle around which the border is painted.
     Dim imageRectangle As New Rectangle(borderThickness, borderThickness, e.Item.Width - 2 * borderThickness, e.Item.Height - 2 * borderThickness)
     
     ' If rendering the empty cell background, draw an 
     ' explanatory string, centered in the ToolStripButton.
        If gsb Is gs.EmptyCell Then
            e.Graphics.DrawString("Drag to here", gsb.Font, SystemBrushes.ControlDarkDark, imageRectangle, style)
        Else
            ' If the button can be a drag source, paint its border red.
            ' otherwise, paint its border a dark color.
            Dim b As Brush = IIf(gs.IsValidDragSource(gsb), Brushes.Red, SystemBrushes.ControlDarkDark)

            ' Draw the top segment of the border.
            Dim borderSegment As New Rectangle(0, 0, e.Item.Width, imageRectangle.Top)
            g.FillRectangle(b, borderSegment)

            ' Draw the right segment.
            borderSegment = New Rectangle(imageRectangle.Right, 0, e.Item.Bounds.Right - imageRectangle.Right, imageRectangle.Bottom)
            g.FillRectangle(b, borderSegment)

            ' Draw the left segment.
            borderSegment = New Rectangle(0, 0, imageRectangle.Left, e.Item.Height)
            g.FillRectangle(b, borderSegment)

            ' Draw the bottom segment.
            borderSegment = New Rectangle(0, imageRectangle.Bottom, e.Item.Width, e.Item.Bounds.Bottom - imageRectangle.Bottom)
            g.FillRectangle(b, borderSegment)
        End If
    End Sub
End Class

Comentarios

La ToolStripItemRenderEventArgs clase proporciona datos para los siguientes eventos:The ToolStripItemRenderEventArgs class provides data for the following events:

Además, proporciona datos para los métodos siguientes:In addition, it provides data for the following methods:

Constructores

ToolStripItemRenderEventArgs(Graphics, ToolStripItem) ToolStripItemRenderEventArgs(Graphics, ToolStripItem) ToolStripItemRenderEventArgs(Graphics, ToolStripItem) ToolStripItemRenderEventArgs(Graphics, ToolStripItem)

Inicializa una nueva instancia de la clase ToolStripItemRenderEventArgs para la clase ToolStripItem especificada y utilizando el objeto Graphics especificado.Initializes a new instance of the ToolStripItemRenderEventArgs class for the specified ToolStripItem and using the specified Graphics.

Propiedades

Graphics Graphics Graphics Graphics

Obtiene los gráficos que se utilizan para dibujar la clase ToolStripItem.Gets the graphics used to paint the ToolStripItem.

Item Item Item Item

Obtiene el ToolStripItem que se va a dibujar.Gets the ToolStripItem to paint.

ToolStrip ToolStrip ToolStrip ToolStrip

Obtiene el valor de la propiedad Owner para la clase ToolStripItem que se va a dibujar.Gets the value of the Owner property for the ToolStripItem to paint.

Métodos

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a

Consulte también: