<para>Hello,
I have MDIForm (main form) that create MDIChild forms and ribbon's merge is ok.
After creating 2 or more MDIChild forms, I can change focus using Ctrl+Tab but I got two errors.
Sometimes, forms take Windows XP style and seems that windowState property is having some problems .
It looks like the form is maximized (There are minimize, restore and close buttons) , but it is not extended in all the window.
I've prepared an image and an example to explain the issue in a better way.
Follow that instructions to recreate the issue in my example:
- Click ribbon's button Add Child Form1 and it will create MDIChild Form1.
- Click ribbon's button Add Child Form2 and it will create MDIChild Form2.
- Press Ctrl+Tab a few times (3-4).
Example's image it's inside zip archive.
Thanks to everyone who try to help me!
</para>
Hello,
Thank you for your detailed report. I have reproduced the described behavior and forwarded this ticket to our developers for research.
Thanks,
Meanwhile, I need a temporary workaround to merge and unmerge correctly. I've observed that these issues are caused by merge and unmerge events. Maybe, can I avoid to use unmerge event? I want to hide tabs in substitution of unmerge event and I want to use merge event once for each new form. If the tab already exists, application will show that tab without using merge event. Is this possible?
Something like:
procedure TMyFormClass.dxBarManager1Merge(Sender, ChildBarManager: TdxBarManager; AddItems: Boolean);
begin
if(AddItems) then
begin
//IF BARS CONTAINED IN CHILDBARMANAGER ALREADY EXISTS (IN SENDER)
//THEN
//GET TABS AND MAKE THEM VISIBLE
//ELSE
//Sender.Merge(ChildBarManager,true);
end else
begin
//GET TABS AND MAKE THEM UNVISIBLE
end;
end;
I think it should avoid all visual issues caused by unmerge event, how can I do this?
In particular, I don't know how to know if bars in childbarmanager are contained in Sender and I don't know how to get tabs of childbarmanager.
Thanks again.
Just disable the SupportNonClientDrawing property for child MDI forms. This should help.
I am looking forward to your feedback once you have had the opportunity to try this solution.
Thank you!
I have disabled SupportNonClientDrawing property in MDIChildForm's ribbon and it works fine. There are no more merge-unmerge problems now.
However, if I minimize or reduce MDIChildForms they have Windows style (Blue bar, as you can see in attached image). How can avoid this? I wish they have devexpress skin "Black", like main MDIForm.
Thanks again for your willingness.
Hello,
I am afraid I cannot suggest another appropriate temporary workaround for this issue. I suggest you wait until our developers fix this problem.