Winforms: [Accessibility] Keyboard focus is getting trapped while pressing right/left arrow to leave the ComboBox/TextBox items

[Jenna-Zheng]

• .NET Core Version:
  .NET SDK 5.0.100-rc.1.20378.13

• Have you experienced this same bug with .NET Framework?:
  Yes

More Info
The BindingNavigator/MenuStrip/ToolStrip also reproduce this issue.

Problem description:
Step 4: Keyboard focus cannot use right/left arrow to leave ComboBox/TextBox items.
Step 5: Keyboard focus cannot use alt+right arrow to leave ComboBox/TextBox clockwise, only can use alt+left arrow to leave ComboBox/TextBox anticlockwise.

Expected behavior:
While navigating through right/left arrow or alt+arrow, Keyboard focus should leave ComboBox/TextBox items.

Minimal repro:

1. Extract "WindowsFormsApp1.zip" and open it in VS
2. Build and run the project.
3. Switch focus to TextBox item in ToolStrip.
4. Using right/left arrow navigate to leave the ComboBox/TextBox items and observe.
5. Using alt+arrow navigate to leave the ComboBox/TextBox items and observe.

[merriemcgaw]

@Jenna-Zheng What happens with ComboBoxes in the ToolStrip?

[Jenna-Zheng]

@merriemcgaw Same as TextBox, Keyboard focus cannot use right/left arrow to leave ComboBox item. the keyboard focus is getting trapped while pressing right/left arrow to leave the ComboBox item.

[merriemcgaw]

Focus traps are a must fix for 5.0.

[SergeySmirnov-Akvelon]

Hi @merriemcgaw. I fixed issue from STEP 5, but I afraid that expected behavior from STEP 4 can confuse users. For example: focus leaves textbox when user moves the caret to the end of the text and again click right arrow. I think that current behavior is correct for TextBox/Combobox. Could you please take a look at this and share your opinion?`

[merriemcgaw]

@SergeySmirnov-Akvelon can you post a gif of how it behaves now?

[merriemcgaw]

@Jenna-Zheng - can you tell me what happens with navigation using the tab button?

[Jenna-Zheng]

@merriemcgaw The focus can leave the ComboBox/TextBox with navigation using the tab button, but both tab & shift + Tab are clockwise. please see following gif.

[RussKie]

@Jenna-Zheng please raise a new issue.

[Jenna-Zheng]

@RussKie I have raise a new issue, it's # 3835

[SergeySmirnov-Akvelon]

Fix has been ported to 5.0-rc1 branch

[Jenna-Zheng]

Verified this issue with the lasted .NET 5.0 RC1, the Step 5 is fixed that can use alt+left arrow to leave ComboBox/TextBox anticlockwise now, but the Step 4 still reproduce. please see the following gif.

[merriemcgaw]

Reopening so @SergeySmirnov-Akvelon can take a look.

[SergeySmirnov-Akvelon]

Hi @merriemcgaw , @Jenna-Zheng. We had a doubt that expected behavior from step 4 is correct. Therefore, we contacted a Guy Barker. He also considers the expected behavior to be strange, because it is inconsistent with the behavior of other editable controls. Also it can be inconvenient for a user who, by editing / selecting text in textbox, can accidentally switch to next control. As result, we have kept the behavior from step 4 as behavior by design.

[merriemcgaw]

Attach @guybark's response to the internal bug so they know we aren't changing that part please.