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Paint circles on an image

Posted on 2013-12-26
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Last Modified: 2013-12-27
I need to implement a work sheet for a workshop mechanics. I need to record in a car which damaged parts (As attached picture shows). What better way to do it.
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Question by:rflorencio
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Expert Comment

by:käµfm³d 👽
ID: 39739882
What kind of application are you building:  WinForms, WPF, web?
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Author Comment

by:rflorencio
ID: 39739943
winforms
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LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39739947
You marked this as both VB.NET and C#. Which language are you using?
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Author Comment

by:rflorencio
ID: 39739995
Vb.net, first option.
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LVL 75

Accepted Solution

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käµfm³d   👽 earned 500 total points
ID: 39740003
Here's one way to do it:

Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.PictureBox1.Tag = Me.PictureBox1.Image.Clone()  ' Create a copy that we can use to clear the image
    End Sub

    Private Sub PictureBox1_MouseUp(sender As Object, e As MouseEventArgs) Handles PictureBox1.MouseUp
        Dim centerPoint As Point = e.Location  ' Where did we click?

        centerPoint.Offset(-10, -10)  ' Offset the circle so that it is drawn with the center where we clicked

        Using g As Graphics = Graphics.FromImage(Me.PictureBox1.Image)  ' We need a Graphics object in order to do drawing on the image
            g.FillEllipse(Brushes.Red, New Rectangle(centerPoint, New Size(20, 20)))  ' Draw the circle
        End Using

        Me.PictureBox1.Invalidate()
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Me.PictureBox1.Image = DirectCast(Me.PictureBox1.Tag, Image).Clone()  ' Assign the copy we made above as a "clean" image. Be sure to copy it (the Clone method)!!
        Me.PictureBox1.Invalidate()
    End Sub
End Class

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