ActivityDesignerPaint.DrawExpandButton Metoda

Definicja

Przestrzeń nazw:

System.Workflow.ComponentModel.Design

Zestaw:

System.Workflow.ComponentModel.dll

Rysuje przycisk służący do rozwijania i zwijania projektantów złożonych na powierzchni projektanta działań.

public:
 static void DrawExpandButton(System::Drawing::Graphics ^ graphics, System::Drawing::Rectangle boundingRect, bool drawExpanded, System::Workflow::ComponentModel::Design::CompositeDesignerTheme ^ compositeDesignerTheme);

public static void DrawExpandButton (System.Drawing.Graphics graphics, System.Drawing.Rectangle boundingRect, bool drawExpanded, System.Workflow.ComponentModel.Design.CompositeDesignerTheme compositeDesignerTheme);

static member DrawExpandButton : System.Drawing.Graphics * System.Drawing.Rectangle * bool * System.Workflow.ComponentModel.Design.CompositeDesignerTheme -> unit

Public Shared Sub DrawExpandButton (graphics As Graphics, boundingRect As Rectangle, drawExpanded As Boolean, compositeDesignerTheme As CompositeDesignerTheme)

Parametry

graphics

Graphics

Na Graphics którym ma być narysowyny przycisk.

boundingRect

Rectangle

Element Rectangle definiujący granice przycisku.

drawExpanded

Boolean

true aby narysować rozwinięty przycisk; w przeciwnym razie , false.

compositeDesignerTheme

CompositeDesignerTheme

Skojarzony CompositeDesignerTheme z projektantem działań używany do renderowania przycisku.

Wyjątki

ArgumentNullException

graphicslub compositeDesignerTheme zawiera odwołanie o wartości null (Nothing w Visual Basic).

Przykłady

W poniższym przykładzie pokazano sposób użycia ActivityDesignerPaint klasy do rysowania niestandardowego działania na powierzchni projektowej przepływu pracy. Zaokrąglony prostokąt jest najpierw rysowany przy użyciu DrawRoundedRectangle metody . Tekst jest następnie rysowany przy użyciu elementu DrawText i jest umieszczany w lokalizacji TextRectangle obiektu ActivityDesigner. Image Ponadto element skojarzony z elementem ActivityDesigner jest rysowany przy użyciu DrawImage metody ActivityDesignerPaint klasy . Na koniec przycisk rozwijania używany przez obiekt CompositeActivity jest rysowany przy użyciu elementu 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