Maximising a ribbon window with DWM enabled results in it not maximising properly

[redwyre]

You can see the top window border.

This has been happening since upgrading to 3.0.0, 3.0.3 samples still have the issue

[ghost]

I second this. Left is an explorer window, right is my test app.

[batzen]

Windows seems to be Windows 7.
Which .NET version are you using?

[ghost]

I've tried to build it with 4.5 version. Haven't tried older versions though, but unfortunately for me it is not an option now, as app itself (not that test one, but real application I'm developing now) is using features from 4.5.

[batzen]

I don't understand your answer.
But i will try to have a look at this next weekend.

[ghost]

I'm using .NET 4.5.
I did not tried to use older versions of .NET.
In my case using of .NET below version 4.5 is not possible anyway.

[batzen]

Have to delay investigating and fixing this past version 3.1 as I don't have access to Windows 7 with aero (does not work with hyper-v).

[batzen]

I was finally able to reproduce the issue at work, using Windows 7.
The problem is, I have no clue why this happens. But I guess it's somehow connected to the fact that the WindowChrome is rendered with a corner radius, even when maximized, on Windows 7.
I will see if I can find a way to fix this, but it's not very high priority for me.

[batzen]

I would be very happy if anyone could have a look at this issue. I don't really get what's causing this...

[ghost]

Hi. I'm not an expert in what happens deep inside there, but maybe the following fact may help in some way. In .NET 4.5 Microsoft has made some changes so that even their own WPF Ribbon implementation started to have a problems that looks alike. It happens on Vista and 7 too.
http://stackoverflow.com/questions/12567455/wpf-ribbonwindow-ribbon-title-outside-screen
https://connect.microsoft.com/VisualStudio/feedback/details/775972/wpf-ribbon-window-the-border-is-too-thin
Maybe it is not a bug of FluentRibbon at all. But MS doesn't show any haste to fix it. I hope at least you may be able to implement some workaround.

[batzen]

It's definitely a bug in the WindowChrome class from Microsoft, as we are relying completely on that class to render the window chrome. The class has many bugs and I implemented workarounds for most of them. But this bug, as it seems now, can't be worked around in any way I could come up with. Just have a look at the WindowSizing class were most of the bugs are worked around.

[redwyre]

I'll see if I can have a look into this

[batzen]

I don't know how to fix the current issues, including this one, related to the microsoft WindowChrome class. Any suggestions from anyone?

[redwyre]

Is the only real solution to re-implement WindowChrome?

[batzen]

I got no time to re-implement it...
Any other suggestions?

[batzen]

Could anyone have a look if it's fixed in version 4.0 (develop branch)?
I don't have a windows 7 machine at hand.

[batzen]

Tested this myself and as far as I can tell everything works as it should now.