AutoHide does not work with ScrollViewer

[Martin5630]

The AutoHide function does not work with controls that have a scrollviwer inside the controltemplate.

I have tested with MLibTest.

Step to reproduce:

1. Start MLibTest
2. Open New File
3. Dock the Tool 3-Window to the right side and select Autohide.
4. Open Tool3 Window
5. Click inside New File
6. The Tool3 Window does not disappear..

[Martin5630]

@Dirkster99 currently I dont why but if you have a control with a scrollviewer inside the controltemplate the autohide function no longer works. AvalonDock set the ActiveContent to the ToolWindow and then back to the DocumentPane if the Pane as a Scrollviewer as Content.

you can see the problem if you change the FileViewTemplate.

Set the Template to this:

<bindLocal:PanesTemplateSelector.FileViewTemplate>
  <DataTemplate>
    <Grid>
      <ListBox />
    </Grid>
  </DataTemplate>
</bindLocal:PanesTemplateSelector.FileViewTemplate>

the autohide function no longer works

if you Change the template to this

<bindLocal:PanesTemplateSelector.FileViewTemplate>
  <DataTemplate>
    <Grid>
      <TextBlock></TextBlock>
    </Grid>
  </DataTemplate>
</bindLocal:PanesTemplateSelector.FileViewTemplate>

the Auto hide functions works as expected.

an now add a scrollviewer

<bindLocal:PanesTemplateSelector.FileViewTemplate>
  <DataTemplate>
    <Grid>
      <ScrollViewer >
        <TextBlock />
      </ScrollViewer>
    </Grid>
  </DataTemplate>
</bindLocal:PanesTemplateSelector.FileViewTemplate>

the function don't work anymore.

[Dirkster99]

Interesting... I will investigate this and get back to you when I have more ideas about this problem. Thanks for the analysis and useful description to verify the problem 👍

[Dirkster99]

Hi,

I've tried to verify your problem but I cannot find any special problem connected to a ScrollViewer. There is aleady a Color Picker tool window in MLibTest that comes (by random chance) with a ScrollViewer:

<demos:PanesTemplateSelector.ColorPickerViewTemplate>
    <DataTemplate>
        <Border Padding="6">
            <ScrollViewer>
                <demoviews:ColorSelectionView />
            </ScrollViewer>
        </Border>
    </DataTemplate>
</demos:PanesTemplateSelector.ColorPickerViewTemplate>

But I cannot see any special Auto Hide problem there. I always have to select the document or another tool window, move the mouse and the Auto Hide tool window dissappears. This is the behavior that I can see whether I use a ScrollViewer in the DataTemplate or not.

I think it is acceptable to have tool window dissappear after clicking inside the documnt and moving the mouse. I know this not what VS does but I am not sure whether fixing this issue is worth the effort - we could try to look further into it, but your expectation is that the tool window dissappears after clicking inside the new document without having to move the mouse, right?

[Martin5630]

Hi,

I have made a recheck with my second reference project for AlavonDock Gemini. There it works like Visual Studio. One mouse click and the tool window disappears. I tried the same again as with your test project. With and without ScrollViewer and I came to the same result. Without it works, with ScrollViewer not. Since the demo program MonoGame also uses a ScrollViewer I thought the problem must be somewhere else. I commented out everything in the methods for Mouse-Down and Mouse-Up. Finally the line where the focus is set on the GraphicsControl remained. With this line it works without problems. So I think AvalonDock has a problem with the management of the Focus.

Kind regards Martin

[Dirkster99]

Yes it looks like there is a focus problem but its not necessarily in AvalonDock alone - remember AvalonDock needs to set and steel focus from/to documents and tool window to activate things when user do Control+Tab - worse still, controls (views) are unloaded when they become invisible...

My problem is that I cannot verify your problem since Gemini appears to be broken and your version is not public, is it? I even tried to update it myself but there was no response in ages... ...

Maybe you can have a look at my reference App Edi where I use the:

• Loaded and
• Unloaded

events to capture and restore the status of the document whenever the view is unloaded or (re-)loaded. I am not quit sure but your description sounds like this could be something useful to add to your control (?).

You could also try adding something like

Focusable="False"

to your scrollviewer to see if that makes a difference. If it does, I am not sure what it means as I don't know your app but I know focus issues with AvalonDock from the past but I got these to work in Edi and I hope it helps you getting your app to work as well. Please let me know if you make any progress (even if trying things and failing) as I am wondering what the issue is and other might face similar problem when converting from AD 2.x to 3.x ...

[Dirkster99]

Closing this now since it seems to get stalled - feel free to re-open if you have any news that shed a light on this one...