WrapLayout "collapsing"

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  • #695 來自 @h82258652 —— 已關閉，未合併

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難度
4/5
預估耗時
3-5 天
新手友好度
20/100
Issue 類型
缺陷
描述清晰度
需要釐清
活躍度
停滯
技術堆疊
csharp
領域
desktop, frontend

研究方向

從用作 ItemsRepeater.Layout 的 WinAppSDK/WinUI 3 WrapLayout 開始，在修改底層集合的同時捲動，以重現該故障。使用影片和螢幕截圖作為行為參考，比較摺疊前後的版面配置。完成的標準是：新增元素後，所有受影響的 WrapLayouts 中的可見項目仍維持正確定位。

由索引模型根據 Issue 內容生成。

描述

bug components::controls::primitives
Describe the bug

I have a weird bug that unfortunately mighe be difficult to find. Im using the WinUI-ItemsRepeater with a WrapLayout as "ItemsRepeater.Layout" like this:

          <winui:ItemsRepeater >
              <winui:ItemsRepeater.Layout>
                  <controls:WrapLayout Orientation="Horizontal" VerticalSpacing="1"HorizontalSpacing="1"/>
              </winui:ItemsRepeater.Layout>
              <winui:ItemsRepeater.ItemTemplate>
                  <DataTemplate>

                      [...]

                  </DataTemplate>
              </winui:ItemsRepeater.ItemTemplate>
          </winui:ItemsRepeater>

Now it seems that adding Elements in a long list when the ItemsRepeater is "scrolled down", then it "collapses" and renders the Items wrong. I unfortunately have no other repro than this video:

https://github.com/user-attachments/assets/aa7b6ff4-2ce0-43b9-a892-f55279af9fbf

Whenever it blinks blue, I'm adding a test-element (via right-click). I'm scrolling down while I do this. Once I reach a certain point, adding another element (or basically "modifiying the underlying collection") leads to a collaps of all (!) WrapLayout within that control. I have three of them in here and they all do collapse.

I'm assuming that the renderer crashes for whatever reason. Or the layout calculation gets corrupted. I hope some of you with deeper knowledge of the insights might get a clue what's happening here. Basically all Items in all visible WrapLayouts/ItemsRepeater do not get rendered once after the other but all get rendered at (0,0):

Image

Steps to reproduce
Unfortunately I do not have a repro outside of my app.
Expected behavior

I should be able to add elements as I wish without the layout collapsing.

Screenshots

Image

Code Platform
  • UWP
  • WinAppSDK / WinUI 3
  • Web Assembly (WASM)
  • Android
  • iOS
  • MacOS
  • Linux / GTK
Windows Build Number
  • Windows 10 1809 (Build 17763)
  • Windows 10 1903 (Build 18362)
  • Windows 10 1909 (Build 18363)
  • Windows 10 2004 (Build 19041)
  • Windows 10 20H2 (Build 19042)
  • Windows 10 21H1 (Build 19043)
  • Windows 10 21H2 (Build 19044)
  • Windows 10 22H2 (Build 19045)
  • Windows 11 21H2 (Build 22000)
  • Other (specify)
Other Windows Build number

No response

App minimum and target SDK version
  • Windows 10, version 1809 (Build 17763)
  • Windows 10, version 1903 (Build 18362)
  • Windows 10, version 1909 (Build 18363)
  • Windows 10, version 2004 (Build 19041)
  • Windows 10, version 2104 (Build 20348)
  • Windows 11, version 22H2 (Build 22000)
  • Other (specify)
Other SDK version

No response

Visual Studio Version

2022

Visual Studio Build Number

17.4

Device form factor

Desktop

Additional context

No response

Help us help you

No, I'm unable to contribute a solution.

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