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Procedura: Impostare il renderer ToolStrip in fase di esecuzione

  • Articolo

È possibile personalizzare l'aspetto del controllo ToolStrip mediante la creazione di una classe ProfessionalColorTable personalizzata.

Esempio

L'esempio di codice seguente illustra come creare una classe ProfessionalColorTable personalizzata. Questa classe definisce le sfumature per un controllo MenuStrip e un controllo ToolStrip.

Per usare questo esempio di codice, compilare ed eseguire l'applicazione, quindi scegliere Change Colors (Cambia colori) per applicare le sfumature definite nella classe personalizzata ProfessionalColorTable.

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 how to use a ProfessionalRenderer
// to define custom professional colors at runtime.
class Form2 : Form
{
    public Form2()
    {
        // Create a new ToolStrip control.
        ToolStrip ts = new ToolStrip();

        // Populate the ToolStrip control.
        ts.Items.Add("Apples");
        ts.Items.Add("Oranges");
        ts.Items.Add("Pears");
        ts.Items.Add(
            "Change Colors",
            null,
            new EventHandler(ChangeColors_Click));

        // Create a new MenuStrip.
        MenuStrip ms = new MenuStrip();

        // Dock the MenuStrip control to the top of the form.
        ms.Dock = DockStyle.Top;

        // Add the top-level menu items.
        ms.Items.Add("File");
        ms.Items.Add("Edit");
        ms.Items.Add("View");
        ms.Items.Add("Window");

        // Add the ToolStrip to Controls collection.
        this.Controls.Add(ts);

        // Add the MenuStrip control last.
        // This is important for correct placement in the z-order.
        this.Controls.Add(ms);
    }

    // This event handler is invoked when the "Change colors"
    // ToolStripItem is clicked. It assigns the Renderer
    // property for the ToolStrip control.
    void ChangeColors_Click(object sender, EventArgs e)
    {
        ToolStripManager.Renderer =
            new ToolStripProfessionalRenderer(new CustomProfessionalColors());
    }
}

// This class defines the gradient colors for
// the MenuStrip and the ToolStrip.
class CustomProfessionalColors : ProfessionalColorTable
{
    public override Color ToolStripGradientBegin
    { get { return Color.BlueViolet; } }

    public override Color ToolStripGradientMiddle
    { get { return Color.CadetBlue; } }

    public override Color ToolStripGradientEnd
    { get { return Color.CornflowerBlue; } }

    public override Color MenuStripGradientBegin
    { get { return Color.Salmon; } }

    public override Color MenuStripGradientEnd
    { get { return Color.OrangeRed; } }
}

' This code example demonstrates how to use a ProfessionalRenderer
' to define custom professional colors at runtime.
Class Form2
   Inherits Form
   
   Public Sub New()
      ' Create a new ToolStrip control.
      Dim ts As New ToolStrip()
      
      ' Populate the ToolStrip control.
      ts.Items.Add("Apples")
      ts.Items.Add("Oranges")
      ts.Items.Add("Pears")
      ts.Items.Add("Change Colors", Nothing, New EventHandler(AddressOf ChangeColors_Click))
      
      ' Create a new MenuStrip.
      Dim ms As New MenuStrip()

      ' Dock the MenuStrip control to the top of the form.
      ms.Dock = DockStyle.Top
      
      ' Add the top-level menu items.
      ms.Items.Add("File")
      ms.Items.Add("Edit")
      ms.Items.Add("View")
      ms.Items.Add("Window")
      
      ' Add the ToolStrip to Controls collection.
      Me.Controls.Add(ts)
      
      ' Add the MenuStrip control last.
      ' This is important for correct placement in the z-order.
      Me.Controls.Add(ms)
    End Sub
   
   ' This event handler is invoked when the "Change colors"
   ' ToolStripItem is clicked. It assigns the Renderer
   ' property for the ToolStrip control.
    Sub ChangeColors_Click(ByVal sender As Object, ByVal e As EventArgs)
        ToolStripManager.Renderer = New ToolStripProfessionalRenderer(New CustomProfessionalColors())
    End Sub
End Class

' This class defines the gradient colors for 
' the MenuStrip and the ToolStrip.
Class CustomProfessionalColors
   Inherits ProfessionalColorTable
   
   Public Overrides ReadOnly Property ToolStripGradientBegin() As Color
      Get
         Return Color.BlueViolet
      End Get 
   End Property
   
   Public Overrides ReadOnly Property ToolStripGradientMiddle() As Color
      Get
         Return Color.CadetBlue
      End Get 
   End Property
   
   Public Overrides ReadOnly Property ToolStripGradientEnd() As Color
      Get
         Return Color.CornflowerBlue
      End Get 
   End Property
   
   Public Overrides ReadOnly Property MenuStripGradientBegin() As Color
      Get
         Return Color.Salmon
      End Get 
   End Property
   
   Public Overrides ReadOnly Property MenuStripGradientEnd() As Color
      Get
         Return Color.OrangeRed
      End Get
    End Property

End Class

Definizione di una classe ProfessionalColorTable personalizzata

Le sfumature personalizzate sono definite nella classe CustomProfessionalColors.

// This class defines the gradient colors for
// the MenuStrip and the ToolStrip.
class CustomProfessionalColors : ProfessionalColorTable
{
    public override Color ToolStripGradientBegin
    { get { return Color.BlueViolet; } }

    public override Color ToolStripGradientMiddle
    { get { return Color.CadetBlue; } }

    public override Color ToolStripGradientEnd
    { get { return Color.CornflowerBlue; } }

    public override Color MenuStripGradientBegin
    { get { return Color.Salmon; } }

    public override Color MenuStripGradientEnd
    { get { return Color.OrangeRed; } }
}

' This class defines the gradient colors for 
' the MenuStrip and the ToolStrip.
Class CustomProfessionalColors
   Inherits ProfessionalColorTable
   
   Public Overrides ReadOnly Property ToolStripGradientBegin() As Color
      Get
         Return Color.BlueViolet
      End Get 
   End Property
   
   Public Overrides ReadOnly Property ToolStripGradientMiddle() As Color
      Get
         Return Color.CadetBlue
      End Get 
   End Property
   
   Public Overrides ReadOnly Property ToolStripGradientEnd() As Color
      Get
         Return Color.CornflowerBlue
      End Get 
   End Property
   
   Public Overrides ReadOnly Property MenuStripGradientBegin() As Color
      Get
         Return Color.Salmon
      End Get 
   End Property
   
   Public Overrides ReadOnly Property MenuStripGradientEnd() As Color
      Get
         Return Color.OrangeRed
      End Get
    End Property

End Class

Assegnazione di un renderer personalizzato

Creare un nuovo oggetto ToolStripProfessionalRenderer con la classe CustomProfessionalColors e assegnarlo alla proprietà ToolStripManager.Renderer.

// This event handler is invoked when the "Change colors"
// ToolStripItem is clicked. It assigns the Renderer
// property for the ToolStrip control.
void ChangeColors_Click(object sender, EventArgs e)
{
    ToolStripManager.Renderer =
        new ToolStripProfessionalRenderer(new CustomProfessionalColors());
}

' This event handler is invoked when the "Change colors"
' ToolStripItem is clicked. It assigns the Renderer
' property for the ToolStrip control.
 Sub ChangeColors_Click(ByVal sender As Object, ByVal e As EventArgs)
     ToolStripManager.Renderer = New ToolStripProfessionalRenderer(New CustomProfessionalColors())
 End Sub

Compilazione del codice

L'esempio presenta i requisiti seguenti:

  • Riferimenti agli assembly System.Design, System.Drawing e System.Windows.Forms.

Vedi anche