ActivityDesignerPaint.DrawRoundedRectangle メソッド

定義

名前空間:

System.Workflow.ComponentModel.Design

アセンブリ:

System.Workflow.ComponentModel.dll

アクティビティ デザイナー画面に丸みのある四角形を描画します。

public:
 static void DrawRoundedRectangle(System::Drawing::Graphics ^ graphics, System::Drawing::Pen ^ drawingPen, System::Drawing::Rectangle rectangle, int radius);

public static void DrawRoundedRectangle (System.Drawing.Graphics graphics, System.Drawing.Pen drawingPen, System.Drawing.Rectangle rectangle, int radius);

static member DrawRoundedRectangle : System.Drawing.Graphics * System.Drawing.Pen * System.Drawing.Rectangle * int -> unit

Public Shared Sub DrawRoundedRectangle (graphics As Graphics, drawingPen As Pen, rectangle As Rectangle, radius As Integer)

パラメーター

graphics

Graphics

四角形を描画する Graphics。

drawingPen

Pen

四角形を描画する Pen。

rectangle

Rectangle

丸みのある四角形の境界を定義する Rectangle。

radius

Int32

丸い端に使用する半径の整数値。

例外

ArgumentNullException

graphics または drawingPen に null 参照 (Visual Basic の場合は Nothing) が含まれています。

例

ActivityDesignerPaint クラスを使用してワークフロー デザイン サーフェイスにカスタム アクティビティを描画する方法の例を、次に示します。 DrawRoundedRectangle メソッドを使用して、丸みのある四角形が最初に描画されます。 次に DrawText を使用してテキストが描画され、TextRectangle の ActivityDesigner の位置に配置されます。 さらに、Image クラスの ActivityDesigner メソッドを使用して、DrawImage に関連付けられた ActivityDesignerPaint が描画されます。 最後に、CompositeActivity を使用して、DrawExpandButton によって使用される展開ボタンが描画されます。

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

注釈

DrawRoundedRectangle は、描画するパスを取得するのに GetRoundedRectanglePath メソッドを使用します。