DesignerActionItem Classe

Definição

public ref class DesignerActionItem abstract

public abstract class DesignerActionItem

type DesignerActionItem = class

Public MustInherit Class DesignerActionItem

Herança

Object

DesignerActionItem

Derivado

System.ComponentModel.Design.DesignerActionMethodItem

System.ComponentModel.Design.DesignerActionPropertyItem

System.ComponentModel.Design.DesignerActionTextItem

Exemplos

O exemplo de código seguinte demonstra como criar uma coleção de DesignerActionItem objetos.

Para um exemplo completo de implementação de smart tags, veja Como: Anexar Smart Tags a um componente Windows Forms.

public override DesignerActionItemCollection GetSortedActionItems()
{
    DesignerActionItemCollection items = new DesignerActionItemCollection();

    //Define static section header entries.
    items.Add(new DesignerActionHeaderItem("Appearance"));
    items.Add(new DesignerActionHeaderItem("Information"));

    //Boolean property for locking color selections.
    items.Add(new DesignerActionPropertyItem("LockColors",
                     "Lock Colors", "Appearance",
                     "Locks the color properties."));
    if (!LockColors)
    {
        items.Add(new DesignerActionPropertyItem("BackColor",
                         "Back Color", "Appearance",
                         "Selects the background color."));
        items.Add(new DesignerActionPropertyItem("ForeColor",
                         "Fore Color", "Appearance",
                         "Selects the foreground color."));

        //This next method item is also added to the context menu 
        // (as a designer verb).
        items.Add(new DesignerActionMethodItem(this,
                         "InvertColors", "Invert Colors",
                         "Appearance",
                         "Inverts the fore and background colors.",
                          true));
    }
    items.Add(new DesignerActionPropertyItem("Text",
                     "Text String", "Appearance",
                     "Sets the display text."));

    //Create entries for static Information section.
    StringBuilder location = new StringBuilder("Location: ");
    location.Append(colLabel.Location);
    StringBuilder size = new StringBuilder("Size: ");
    size.Append(colLabel.Size);
    items.Add(new DesignerActionTextItem(location.ToString(),
                     "Information"));
    items.Add(new DesignerActionTextItem(size.ToString(),
                     "Information"));

    return items;
}

Public Overrides Function GetSortedActionItems() _
As DesignerActionItemCollection
    Dim items As New DesignerActionItemCollection()

    'Define static section header entries.
    items.Add(New DesignerActionHeaderItem("Appearance"))
    items.Add(New DesignerActionHeaderItem("Information"))

    'Boolean property for locking color selections.
    items.Add(New DesignerActionPropertyItem( _
    "LockColors", _
    "Lock Colors", _
    "Appearance", _
    "Locks the color properties."))

    If Not LockColors Then
        items.Add( _
        New DesignerActionPropertyItem( _
        "BackColor", _
        "Back Color", _
        "Appearance", _
        "Selects the background color."))

        items.Add( _
        New DesignerActionPropertyItem( _
        "ForeColor", _
        "Fore Color", _
        "Appearance", _
        "Selects the foreground color."))

        'This next method item is also added to the context menu 
        ' (as a designer verb).
        items.Add( _
        New DesignerActionMethodItem( _
        Me, _
        "InvertColors", _
        "Invert Colors", _
        "Appearance", _
        "Inverts the fore and background colors.", _
        True))
    End If
    items.Add( _
    New DesignerActionPropertyItem( _
    "Text", _
    "Text String", _
    "Appearance", _
    "Sets the display text."))

    'Create entries for static Information section.
    Dim location As New StringBuilder("Location: ")
    location.Append(colLabel.Location)
    Dim size As New StringBuilder("Size: ")
    size.Append(colLabel.Size)

    items.Add( _
    New DesignerActionTextItem( _
    location.ToString(), _
    "Information"))

    items.Add( _
    New DesignerActionTextItem( _
    size.ToString(), _
    "Information"))

    Return items
End Function

Observações

A DesignerActionItem classe serve como uma base abstrata para classes que representam elementos individuais de painéis num painel de etiquetas inteligentes, que representa uma interface de utilizador (UI) semelhante a um menu para etiquetas inteligentes. .NET Framework fornece classes derivadas que representam as diferentes entradas comuns num painel de etiquetas inteligentes, incluindo texto simples, texto do cabeçalho, propriedades e métodos da classe associada DesignerActionList e verbos designer.

Normalmente, a sua DesignerAction funcionalidade é definida numa classe fornecida pelo programador derivada de DesignerActionList, que contém um GetSortedActionItems método que agrupa elementos individuais do painel para formar o painel de etiquetas inteligentes. Os DesignerActionPropertyItem tipos e DesignerActionMethodItem estão associados a membros da classe derivada de DesignerActionList, e DesignerActionMethodItem os objetos são ativados quando a entrada do painel associada é selecionada pelo utilizador.

Ver também

• DesignerActionList
• GetSortedActionItems()
• DesignerVerb
• Comandos Designer e o modelo de objetos DesignerAction para Windows Forms