Identifying Coordinates on Click

[dotnetman]

Friends,

I am trying to come up with a custom position control (trackbar you can say :D). I have a background horizontal bar (picturebox) over which I have the slider(another picturebox). Essentially, the slider should move based on where the user clicks on the background bar. For that, I need to somehow find the coordinates where the user clicked on the back image. I tried the cursor object. However, it gives co-ordinates relative to the container control's dimensions. I would want it to be relative to the user control's dimensions, coz based on those (static) values, I need to move the slider.

Any ideas how this can be done?

Do let me know.

DNM

[Machaira]

Use the MouseDown or MouseUp events. The "e" param contains the point on which the user clicked.

[dotnetman]

The MouseEventArgs (in MouseDown) work perfect. I am able to move the slider left n right. However, how do I simulate dragging? When the slider is held and dragged, it should move on the horizontal path. But how??

[Machaira]

Try:

   Private _mouseDown As Boolean
   Private _oldX As Integer

   Private Sub PictureBox2_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox2.MouseDown

       _mouseDown = True
       _oldX = e.X

   End Sub

   Private Sub PictureBox2_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox2.MouseUp
       _mouseDown = False
   End Sub

   Private Sub PictureBox2_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox2.MouseMove

       If _mouseDown Then

           PictureBox2.Left = e.X - (_oldX - PictureBox2.Left)

       End If
   End Sub

[dotnetman]

Works like a charm. Thanx a lot Machaira.