Maximized floating windows sit under the task bar.

[Flynn1179]

Added a document pane with a scrollable document within it, and when it's floated and maximized, the horizontal scrollbar is now underneath the task bar, making it impossible to horizontally scroll with the mouse.

Position/Orientation of the task bar doesn't matter- if I temporarily move my task bar to the right of the screen, I can't vertically scroll the floating panel, and if I move it to the top, I can't see the title bar.

[Dirkster99]

hm, interesting bug, I am afraid I have no idea how to adjust a floating window (its a Win32 window) towards leaving the taskbar on display :-(

[mgnslndh]

@Flynn1179 do you have a repository where this bug can be reproduced?

[Flynn1179]

@mgnslndh Not a public one, but honestly there's no special circumstances required to reproduce. Just float any document pane and maximize it, you'll see it's area overlap the task bar.

[mgnslndh]

Ok, this was easily reproduced as you explained. It seems this will also be a problem for me. If I find a solution I will post it here.

[mgnslndh]

I'm doing a custom theme so I will add the MaxWidth and MaxHeight in a trigger for my floating window styles:

<Trigger Property="WindowState" Value="Maximized">
    <Setter TargetName="WindowBorder" Property="Padding" Value="3" />
    <Setter Property="MaxHeight" Value="{x:Static SystemParameters.MaximizedPrimaryScreenHeight}"/>
    <Setter Property="MaxWidth" Value="{x:Static SystemParameters.MaximizedPrimaryScreenWidth}"/>
</Trigger>

This does not work 100% and I guess if we want a more robust solution we need to provide more than styles. Multiple monitors and DPI (and perhaps the WindowChrome) needs to be taken into account.

[Dirkster99]

@mgnslndh Can you indicate where your style could be incorporated in the themes (eg Generic or VS2013) to apply this style? I am not sure whether I understand how this relates to maximized windows not floating over the Windows Task Bar?

[nickkitto]

I used mgnslndh solution, but had issues with multiple monitors. I tried hooking the windows WM_GETMINMAXINFO event and setting the max size, which worked assuming the application was mutli monitor DPI aware (and my legacy app was not).
A simple solution that worked for me was to set the WindowStyle to SingleBorderWindow for the LayoutDocumentFloatingWindowControl/LayoutAnchorableFloatingWindowControl style, which solved the issue and didn't appear different for me.

[Khaos66]

Had a simmilar issue with another project once. Turned out that Windows handels the window size just fine as long as you don't set WindowStyle to None.
Here is a hint on WindowChrome that helped me MSDN