microsoft/microsoft-ui-xaml

Proposal: TabViewItem should respect CornerRadius API

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#3,084 opened on Aug 9, 2020

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area-TabViewfeature proposalhelp wantedteam-Controls

Description

Proposal: TabViewItem should respect CornerRadius API

Summary

To set the corner radius of a TabViewItem, developers today have to override the OverlayCornerRadius resource. They should also be able to use the TabViewItem.CornerRadius API for that.

Example

<muxc:TabView>
    <muxc:TabView.TabItems>
        <muxc:TabViewItem Header="Tab 1" CornerRadius="0">
            Some tab content
        </muxc:TabViewItem>
    </muxc:TabView.TabItems>
</muxc:TabView>

image

Additional Context

This proposal is related to a few other TabViewItem issues like https://github.com/microsoft/microsoft-ui-xaml/issues/3047 and https://github.com/microsoft/microsoft-ui-xaml/issues/2653. @stmoy FYI

Contributor guide

Tech stack
csharp
Domain
desktop
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Familiarity with WinUI controlsUnderstanding of dependency propertiesXAML templating basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Examine the existing TabViewItem template in the WinUI repository (e.g., 'TabViewItem.xaml') to understand how 'OverlayCornerRadius' is currently applied. Look at similar controls like 'Button' or 'Border' that already expose a 'CornerRadius' property for API consistency. Review linked issues #3047 and #2653 for additional context on TabViewItem customization. Check if there are any existing PRs or discussions about adding this property.