GetBoundingBox(PointF,SizeF,Single) Method (AnnotationData)

In This Topic

Returns the bounding box of annotation if annotation will have specified location, size and rotation.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration

Public Overloads MustOverride Function GetBoundingBox( _
   ByVal locationLocation, in device-independent pixels (1/96th inch), of annotation.
 As System.Drawing.PointF, _
   ByVal sizeSize, in device-independent pixels (1/96th inch), of annotation
 As System.Drawing.SizeF, _
   ByVal rotationRotation, in degrees, of annotation.
 As Single _
) As System.Drawing.RectangleF

public abstract System.Drawing.RectangleF GetBoundingBox(
   System.Drawing.PointF location, 
   System.Drawing.SizeF size, 
   float rotation
)

public: abstract System.Drawing.RectangleF* GetBoundingBox(
   System.Drawing.PointF location, 
   System.Drawing.SizeF* size, 
   float rotation
)

public:
abstract System.Drawing.RectangleF^ GetBoundingBox(
   System.Drawing.PointF location, 
   System.Drawing.SizeF^ size, 
   float rotation
)

Parameters

location: Location, in device-independent pixels (1/96th inch), of annotation.
size: Size, in device-independent pixels (1/96th inch), of annotation
rotation: Rotation, in degrees, of annotation.

Return Value

Bounding box of annotation.

Example

Here is an example that shows how to restrict the rotation angle of annotation to prevent its overrunning the boundaries of specified area:

VB.NET


Private _boundingArea As System.Drawing.RectangleF
Private _annotation As Vintasoft.Imaging.Annotation.AnnotationData

Private Sub SubscribeOnPropertyChanging()
    AddHandler _annotation.PropertyChanging, New System.EventHandler(Of Vintasoft.Imaging.ObjectPropertyChangingEventArgs)(AddressOf annotation_PropertyChanging)
End Sub

Private Sub annotation_PropertyChanging(sender As Object, e As Vintasoft.Imaging.ObjectPropertyChangingEventArgs)
    If e.PropertyName = "Rotation" Then
        Dim boundingBox As System.Drawing.RectangleF = _annotation.GetBoundingBox(_annotation.Location, _annotation.Size, CSng(e.NewValue))

        If Not _boundingArea.Contains(boundingBox) Then
            e.Cancel = True
        End If
    End If
End Sub


System.Drawing.RectangleF _boundingArea;
Vintasoft.Imaging.Annotation.AnnotationData _annotation;

void SubscribeOnPropertyChanging()
{
    _annotation.PropertyChanging += 
        new System.EventHandler<Vintasoft.Imaging.ObjectPropertyChangingEventArgs>(annotation_PropertyChanging);
}

void annotation_PropertyChanging(object sender, Vintasoft.Imaging.ObjectPropertyChangingEventArgs e)
{
    if (e.PropertyName == "Rotation")
    {
        System.Drawing.RectangleF boundingBox = _annotation.GetBoundingBox(
            _annotation.Location, _annotation.Size, (float)e.NewValue);

        if (!_boundingArea.Contains(boundingBox))
        {
            e.Cancel = true;
        }
    }
}

Requirements

Target Platforms: .NET9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

AnnotationData Class
AnnotationData Members

Overload List

Send Feedback