*** Edited to include mention of HorizontalScrollPosition in the possible workaround. ***

David -

This behavior appears to be caused by the HorizontalScrollMaximum property of the DataWindow object. Specifically, the value of this property is always based on the largest (X-position + Width) value of all DWObjects that has ever occurred instead of the largest current (X-position + Width) value of all DWObjects. Unfortunately, as you have found out, this property is read-only and cannot be modified or reset.

I have reproduced your demo app and eliminated all unnecessary code and included the display of this property's value in a computed field, and attached this new demo app in a public bug/enhancement ticket, ID 11766.

One possible workaround came to mind while working on this, however:

Let's say you add a hidden vertical line in the DataWindow and place it just to the right of the rightmost DWObject. Do nothing if the HorizontalScrollPosition property's value is non-zero, as this means the user is currently scrolled to the right. If it is zero, continue. Call this hidden vertical line l_rightmostedge. In the resize event, as you resize the DW control, obtain the X1 value of line l_rightmostedge and check to determine if it has been "cropped" by the right edge of the DataWindow control (if it was visible, that is)... a fairly simple calculation. If so, show the DW control's horizontal scroll bar and if not, hide it.

Best regards, John

Attached is the resize code:

dw_1.Width = newwidth
dw_1.Height = newheight

dw_1.Object.r_1.Width = newwidth - 4

Hi David;

  I would like to start this response with the question ...

What are you trying to achieve GUI wise in the DWO?

Regards ... Chris

Hi,

I am using rectangles as section separators in a single datawindow.

Due to the different screen sizes, we need to properly control the resizing so that it looks correct.

The only thing I have come up with is to hide the scrollbar when we have the actual size of the dw, but when it is smaller, the scrollbar looks incorrect.

Normally, we usually put separators outside of datawindows, and it is an object that is attached on top of the dw. However, in this case, since it is the same datawindow, I was trying to put it inside, since it only acts at the title and section separator level.

You can see in the example, the first bar with buttons does not belong to the datawindow, it is attached outside.

Regards

Hi, David - 

Try subtracting 12 PBU's (three pixels) instead of 4 PBU's (one pixel). I had to do this in my "Grid Heading" app that is available in CodeXchange to get rid of the DW's horizontal scrollbar when dynamically "shrinking" the width of DWObjects. I have no idea why this worked in my case, but I stumbled upon it during development.

Best regards, John

Hi

Thank you very much, in the end I'm going to work on hiding the scrollbar and hope it will work in the future.

Regards