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Como: Usar a propriedade Spring de forma interativa em um(a) StatusStrip

  • Artigo

Você pode usar a propriedade Spring para posicionar um controle ToolStripStatusLabel em um controle StatusStrip. A propriedade Spring determina se o controle ToolStripStatusLabel preenche automaticamente o espaço disponível no controle StatusStrip.

Exemplo

O exemplo de código abaixo demonstra como usar a propriedade Spring para posicionar um controlo ToolStripStatusLabel em um controlo StatusStrip. O manipulador de eventos Click executa uma operação exclusiva ou (XOR) para alternar o valor da propriedade Spring.

Para usar esse exemplo de código, compile e execute o aplicativo e, em seguida, clique em Middle (Spring) no controle StatusStrip para alternar o valor da propriedade Spring.

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;

Imports System.Collections.Generic
Imports System.Windows.Forms
Imports System.Drawing

// This code example demonstrates using the Spring property
// to interactively center a ToolStripStatusLabel in a StatusStrip.
class Form4 : Form
{
    // Declare the ToolStripStatusLabel.
    ToolStripStatusLabel middleLabel;

    public Form4()
    {
        // Create a new StatusStrip control.
        StatusStrip ss = new StatusStrip();

        // Add the leftmost label.
        ss.Items.Add("Left");

        // Handle middle label separately -- action will occur
        // when the label is clicked.
        middleLabel = new ToolStripStatusLabel("Middle (Spring)");
        middleLabel.Click += new EventHandler(middleLabel_Click);
        ss.Items.Add(middleLabel);

        // Add the rightmost label
        ss.Items.Add("Right");

        // Add the StatusStrip control to the controls collection.
        this.Controls.Add(ss);
    }

    // This event hadler is invoked when the
    // middleLabel control is clicked. It toggles
    // the value of the Spring property.
    void middleLabel_Click(object sender, EventArgs e)
    {
        // Toggle the value of the Spring property.
        middleLabel.Spring ^= true;

        // Set the Text property according to the
        // value of the Spring property.
        middleLabel.Text =
            middleLabel.Spring ? "Middle (Spring - True)" : "Middle (Spring - False)";
    }
}

' This code example demonstrates using the Spring property 
' to interactively center a ToolStripStatusLabel in a StatusStrip.
Class Form4
    Inherits Form

   ' Declare the ToolStripStatusLabel.
   Private middleLabel As ToolStripStatusLabel
   
   
   Public Sub New()
      ' Create a new StatusStrip control.
      Dim ss As New StatusStrip()
      
      ' Add the leftmost label.
      ss.Items.Add("Left")
      
      ' Handle middle label separately -- action will occur
      ' when the label is clicked.
      middleLabel = New ToolStripStatusLabel("Middle (Spring)")
      AddHandler middleLabel.Click, AddressOf middleLabel_Click
      ss.Items.Add(middleLabel)
      
      ' Add the rightmost label
      ss.Items.Add("Right")
      
      ' Add the StatusStrip control to the controls collection.
      Me.Controls.Add(ss)
    End Sub
   
   ' This event hadler is invoked when the 
   ' middleLabel control is clicked. It toggles
   ' the value of the Spring property.
    Sub middleLabel_Click(ByVal sender As Object, ByVal e As EventArgs)

        ' Toggle the value of the Spring property.
        middleLabel.Spring = middleLabel.Spring Xor True

        ' Set the Text property according to the
        ' value of the Spring property. 
        middleLabel.Text = IIf(middleLabel.Spring, _
        "Middle (Spring - True)", "Middle (Spring - False)")
    End Sub
End Class

Compilando o código

Este exemplo requer:

  • Referências aos conjuntos de componentes System.Design, System.Drawing, e System.Windows.Forms.

Ver também