Redraw a Single Shape or Changed Shape Only Instead of All Shapes
raklali
236
Reputation points
Please see the following Code:-
Private Sub PictureBox1_Paint(sender As Object, e As PaintEventArgs) Handles PictureBox1.Paint
Parallel.ForEach(Segments.OfType(Of Segment),
Sub(segment)
Try
segment.DrawLine(e.Graphics)
Catch ex As Exception
End Try
End Sub
)
Parallel.ForEach(Ellipses.OfType(Of Ellipse),
Sub(ellipse)
Try
ellipse.DrawEllipse(e.Graphics)
Catch ex As Exception
End Try
End Sub
)
End Sub
Where the Segment
and Ellipse
are Classes to draw Lines and Oval Shapes, Segments
and Ellipses
are the ListOf
of the object instances each of which is identified by a Unique Name such as Segment1, Segment2, ..., Ellipse1, Ellipse2...
My question - Where PictureBox1
has several shapes such as Segment1, Segment2, ..., Ellipse1, Ellipse2 , Is it possible to Redraw only the Changed Shape identified by its unique Name, instead of Redrawing all Shapes? For example, Can only Segment1 or Ellipse2 be Redrawn?
Request a solution with Sample Code...
Sign in to answer