iOS Keyboard Scrolling Improvements and UITests (not from fork)

[tj-devel709]

Description of Change

Note: recreating this PR from a branch not in my fork for sake of UITests Issue.

Grid with Star Row Resizing

When there is a grid at the top-level of the content page, and there is at least one star-sized row, the grid would resize when the keyboard came up. This was due to safe-area of the grid on the bottom no longer needing to size down for the bottom SafeAreaInset since the grid was raised higher than the bottom of the device. To handle this, logic was added so that we can call the scrolling code again after the grid (or other view) expands.

Grid with Star Row Resizing Example (click me!)

Before	After
OldGridStarScrolling.mov	NewGridStarExample.mov

    <Grid RowDefinitions="40,*,40,40, 40">
        <Button Grid.Row="0" Background="blue" Text="Print CollectionView Height"/>

        <TableView Background="lightblue" x:Name="ColView" Grid.Row="1"/>

        <Button Grid.Row="2" Background="blue" Text="Print CollectionView Height"/>
        <Editor
            x:Name="myEditor"
            Grid.Row="3"
            BackgroundColor="MediumSeaGreen"
            Placeholder="Send Chat"
            PlaceholderColor="White"
            TextColor="White"/>

        <Button Grid.Row="4" Text="Fill collection"/>
    </Grid>

---

Scrolling animation glitch

There was a small glitch in the scrolling animation. While we are computing the animation speed the keyboard will use to come up, the screen would sometimes scroll a little after it making it a tad jumpy. Since we no longer need the automatic delay in the AdjustPositionDebounce method since the cursor location logic is moved to later in the process, I found that this delay was causing the small jump in the animation.

Scrolling animation glitch Example (click me!)

After
NewScrollingAnimation.mov

---

Next Return Key fix

When we have an entry with the ReturnType of 'Next' and we press that next button to go into an editor, the editor would sometimes not come up high enough. This was due to the additional AccessoryView that is added to the keyboard for editors in Maui. When we hit this scenario of switching between an editor and entry, we should recalculate to see if the keyboard changed sizes.

---

UITests

Testing the iOS Keyboard scenarios is difficult as there are many different scenarios. I created some UITests that can help keep track of the verification that scrolling is happening correctly.

It is important to note that most of the iOS Scrolling UITests are run with four different configurations:

• Using iOS Large Titles with a scrollable page
• Not using iOS Large Titles with a scrollable page
• Using iOS Large Titles with a non-scrollable page
• Not using iOS Large Titles with a non-scrollable page

Example of the Large Titles and Small Titles respectively (click me!)

Large Titles	Small Titles

Testing multiple editors in different locations (click me!)

EntryScrollingTest.mov

Testing multiple entries in different locations (click me!)

EntryScrollingTest.mov

Testing entry next button to editor (click me!)

EntryNextScrollingTest.mov

Testing grid with star row resizing (click me!)

GridStarScrollingTest.mov

Issues Fixed

Fixes #17588
Fixes #17559
Fixes #18354
Fixes #19245

[MalmoIt]

Any progress on this?

[tj-devel709]

Any progress on this?

Back on it now :)

[andyzukunft]

Is this accessible with a nightly nuget?

[emaf]

I've been testing how swift behaves and it seems to scroll till the bottom of the control instead of the cursor position. Also, when the keyboard is up, you can't keep scrolling till the end of the scroll view so in some cases your text can end up under the keyboard.

Keyboard over text when editor is the last item + scrolling to the cursor position instead of end of the control:

Keyboard.over.text.mov

Can't scroll to last item when keyboard is opened because one of the first ones:

Scrolling.can.t.reach.last.item.mov

Swift sample:

Swift.mov

[emaf]

I'm approving after chatting with @PureWeen and @tj-devel709. Both issues I mentioned are known and will be tackled in a separate PR as this one contains great fixes and improvements we want to get merged!

[NielsKnaap]

@tj-devel709 is there any progress on this PR?

[tj-devel709]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[tj-devel709]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[rjhind]

Will this make it in to the next bug fix release of Maui?

[MartyIX]

Will this make it in to the next bug fix release of Maui?

The next one is .NET 8 Service Release 1 (SR1) and that one is IMHO finished but not yet released. So my guess is that this can be in SR2 (see).

The MAUI team can tell for sure though.