ActivityDesignerPaint.DrawText Método

Definição

Namespace:

System.Workflow.ComponentModel.Design

Assembly:

System.Workflow.ComponentModel.dll

Desenha texto na superfície do designer de atividade.

public:
 static void DrawText(System::Drawing::Graphics ^ graphics, System::Drawing::Font ^ font, System::String ^ text, System::Drawing::Rectangle boundingRect, System::Drawing::StringAlignment alignment, System::Workflow::ComponentModel::Design::TextQuality textQuality, System::Drawing::Brush ^ textBrush);

public static void DrawText (System.Drawing.Graphics graphics, System.Drawing.Font font, string text, System.Drawing.Rectangle boundingRect, System.Drawing.StringAlignment alignment, System.Workflow.ComponentModel.Design.TextQuality textQuality, System.Drawing.Brush textBrush);

static member DrawText : System.Drawing.Graphics * System.Drawing.Font * string * System.Drawing.Rectangle * System.Drawing.StringAlignment * System.Workflow.ComponentModel.Design.TextQuality * System.Drawing.Brush -> unit

Public Shared Sub DrawText (graphics As Graphics, font As Font, text As String, boundingRect As Rectangle, alignment As StringAlignment, textQuality As TextQuality, textBrush As Brush)

Parâmetros

graphics

Graphics

O Graphics no qual desenhar o texto.

font

Font

O Font usado para desenhar o texto.

text

String

O texto a ser desenhado.

boundingRect

Rectangle

O Rectangle delimitador em que o texto deve ser desenhado.

alignment

StringAlignment

O StringAlignment que especifica onde o texto é alinhado no retângulo delimitador.

textQuality

TextQuality

O TextQuality que especifica a configuração de qualidade para desenhar o texto.

textBrush

Brush

O Brush para desenhar o texto.

Exceções

ArgumentNullException

graphics, font, text ou textBrush contém uma referência nula (Nothing no Visual Basic).

Exemplos

O exemplo a seguir demonstra uma maneira de usar a ActivityDesignerPaint classe para desenhar uma atividade personalizada na superfície de design do fluxo de trabalho. Um retângulo arredondado é desenhado pela primeira vez usando o DrawRoundedRectangle método. Em seguida, o texto é desenhado usando DrawText e é colocado no local do TextRectangle ActivityDesigner. Além disso, o Image associado ao ActivityDesigner é desenhado usando o DrawImage método da ActivityDesignerPaint classe. Por fim, um botão expandir usado por um CompositeActivity é desenhado usando o DrawExpandButton.

private bool expanded = true;
private bool useBasePaint = false;

public bool UseBasePaint
{
    get { return this.useBasePaint; }
    set { this.useBasePaint = value; }
}

public bool Expanded
{
    get { return this.expanded; }
    set { this.expanded = value; }
}

protected override void OnPaint(ActivityDesignerPaintEventArgs e)
{
    if (this.UseBasePaint == true)
    {
        base.OnPaint(e);
        return;
    }

    DrawCustomActivity(e);
}

private void DrawCustomActivity(ActivityDesignerPaintEventArgs e)
{
    Graphics graphics = e.Graphics;

    CompositeDesignerTheme compositeDesignerTheme = (CompositeDesignerTheme)e.DesignerTheme;

    ActivityDesignerPaint.DrawRoundedRectangle(graphics, compositeDesignerTheme.BorderPen, this.Bounds, compositeDesignerTheme.BorderWidth);

    string text = this.Text;
    Rectangle textRectangle = this.TextRectangle;
    if (!string.IsNullOrEmpty(text) && !textRectangle.IsEmpty)
    {
        ActivityDesignerPaint.DrawText(graphics, compositeDesignerTheme.Font, text, textRectangle, StringAlignment.Center, e.AmbientTheme.TextQuality, compositeDesignerTheme.ForegroundBrush);
    }

    System.Drawing.Image image = this.Image;
    Rectangle imageRectangle = this.ImageRectangle;
    if (image != null && !imageRectangle.IsEmpty)
    {
        ActivityDesignerPaint.DrawImage(graphics, image, imageRectangle, DesignerContentAlignment.Fill);
    }

    ActivityDesignerPaint.DrawExpandButton(graphics,
        new Rectangle(this.Location.X, this.Location.Y, 10, 10),
        this.Expanded,
        compositeDesignerTheme);
}

Private expandedValue As Boolean = True
Private useBasePaintValue As Boolean = False

Public Property UseBasePaint() As Boolean
    Get
        Return Me.useBasePaintValue
    End Get

    Set(ByVal value As Boolean)
        Me.useBasePaintValue = value
    End Set
End Property

Public Property Expanded() As Boolean
    Get
        Return Me.expandedValue
    End Get
    Set(ByVal value As Boolean)
        Me.expandedValue = value
    End Set
End Property


Protected Overrides Sub OnPaint(ByVal e As ActivityDesignerPaintEventArgs)
    If Me.UseBasePaint = True Then
        MyBase.OnPaint(e)
        Return
    End If

    DrawCustomActivity(e)
End Sub

Private Sub DrawCustomActivity(ByVal e As ActivityDesignerPaintEventArgs)
    Dim graphics As Graphics = e.Graphics

    Dim compositeDesignerTheme As CompositeDesignerTheme = CType(e.DesignerTheme, CompositeDesignerTheme)

    ActivityDesignerPaint.DrawRoundedRectangle(graphics, compositeDesignerTheme.BorderPen, Me.Bounds, compositeDesignerTheme.BorderWidth)

    Dim text As String = Me.Text
    Dim TextRectangle As Rectangle = Me.TextRectangle
    If Not String.IsNullOrEmpty(text) And Not TextRectangle.IsEmpty Then
        ActivityDesignerPaint.DrawText(graphics, compositeDesignerTheme.Font, text, TextRectangle, StringAlignment.Center, e.AmbientTheme.TextQuality, compositeDesignerTheme.ForegroundBrush)
    End If

    Dim Image As System.Drawing.Image = Me.Image
    Dim ImageRectangle As Rectangle = Me.ImageRectangle
    If Image IsNot Nothing And Not ImageRectangle.IsEmpty Then
        ActivityDesignerPaint.DrawImage(graphics, Image, ImageRectangle, DesignerContentAlignment.Fill)
    End If

    ActivityDesignerPaint.DrawExpandButton(graphics, _
        New Rectangle(Me.Location.X, Me.Location.Y, 10, 10), _
        Me.Expanded, _
        compositeDesignerTheme)
End Sub