ActivityDesignerPaint.DrawRoundedRectangle Méthode
Définition
Important
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Dessine un rectangle arrondi sur l'aire du concepteur d'activité.
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)
Paramètres
- radius
- Int32
Valeur entière du rayon à utiliser pour les bords arrondis.
Exceptions
graphics
ou drawingPen
contient une référence Null (Nothing
en Visual Basic).
Exemples
L'exemple suivant montre une façon d'utiliser la classe ActivityDesignerPaint pour dessiner une activité personnalisée sur l'aire de conception de workflow. Un rectangle arrondi est tout d'abord dessiné à l'aide de la méthode DrawRoundedRectangle. Le texte est ensuite dessiné à l'aide de DrawText et est positionné à l'emplacement de la propriété TextRectangle du ActivityDesigner. En outre, la propriété Image associée au ActivityDesigner est dessinée à l'aide de la méthode DrawImage de la classe ActivityDesignerPaint. Enfin, un bouton de développement utilisé par un CompositeActivity est dessiné à l’aide de la méthode 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
Remarques
DrawRoundedRectangle utilise la méthode GetRoundedRectanglePath pour obtenir le tracé à dessiner.