[bug] Manual WebView resizing does not work correctly

[kanatapple]

Describe the bug

Manually resizing the WebView(set_size) results in incorrect positioning of the WebView. However, if the WebView coordinates are set to (0., 0.), it works correctly.

https://youtu.be/02gJWTb1Hjg

Reproduction

https://github.com/kanatapple/tauri-manual-resize

Expected behavior

No response

Full tauri info output

[✔] Environment
    - OS: Windows 10.0.19045 X64
    ✔ WebView2: 125.0.2535.92
    ✔ MSVC:
        - Visual Studio Professional 2017
        - Visual Studio Professional 2019
    ✔ rustc: 1.77.2 (25ef9e3d8 2024-04-09)
    ✔ cargo: 1.77.2 (e52e36006 2024-03-26)
    ✔ rustup: 1.27.0 (bbb9276d2 2024-03-08)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
    - node: 20.11.0
    - yarn: 1.22.11
    - npm: 10.2.4

[-] Packages
    - tauri [RUST]: 2.0.0-beta.22
    - tauri-build [RUST]: 2.0.0-beta.17
    - wry [RUST]: 0.40.1
    - tao [RUST]: 0.28.1
    - tauri-cli [RUST]: 1.2.3
    - @tauri-apps/api [NPM]: 2.0.0-beta.13
    - @tauri-apps/cli [NPM]: 2.0.0-beta.20

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: http://localhost:1420/
    - bundler: Vite

Stack trace

No response

Additional context

No response

[kanatapple]

If the initial position is (1, 1) and scale_factor is 1.5 (150%), the position becomes (2, 2) in set_bounds . In bounds.position.to_physical it becomes (1.5, 1.5), but it is cast to (2, 2).

After that, the position seems to increase from (2, 2) -> (3, 3), (3, 3) -> (5, 5), and so on.

[kanatapple]

Now that I know the cause, I'll send a Pull Request later.

[happybeing]

I have a similar issue with my app. Whatever values I use, my Webview fills the bottom half of the app window.

I reported this and @FabianLars responded that it might be related to this issue.

So I cloned the repo from the OP. In that case the Webview fills the whole app Window whatever I do with the commented out code.

No matter what I do I don't seem able to affect the position / size / behaviour of the Webview in the OP example or my app. This fits with my not understanding how the multiwebview example is achieving it's layout. I don't see how that can divide the vertical space equally between (four I think) Webviews, nor how it results in them taking up the full width.

A good place to start for me would be for the multiwebview example to be explained (and fixed first if indeed it is buggy, which seems to be the case).

[✔] Environment
    - OS: Ubuntu 24.4.0 X64
    ✔ webkit2gtk-4.1: 2.44.0
    ✔ rsvg2: 2.58.0
    ✔ rustc: 1.79.0 (129f3b996 2024-06-10)
    ✔ cargo: 1.79.0 (ffa9cf99a 2024-06-03)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-x86_64-unknown-linux-gnu (environment override by RUSTUP_TOOLCHAIN)
    - node: 22.1.0
    - yarn: 1.22.22
    - npm: 10.7.0

[-] Packages
    - tauri [RUST]: 2.0.0-beta.22
    - tauri-build [RUST]: 2.0.0-beta.17
    - wry [RUST]: 0.40.1
    - tao [RUST]: 0.28.1
    - tauri-cli [RUST]: 2.0.0-beta.20
    - @tauri-apps/api [NPM]: 2.0.0-beta.13
    - @tauri-apps/cli [NPM]: 2.0.0-beta.20

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: http://localhost:1420/
    - bundler: Vite

[hattapoglu]

I have a similar issue. Updating webview size using set_size causes cumulative positioning on Windows devices where it works perfect on Mac devices. Following here..

[kanatapple]

@happybeing @hattapoglu wry is fixed, so this issue should be fixed soon(Not sure if it's the same cause... 😅 )

[happybeing]

Yeh, thanks. I suspect not based on the symptoms and the strangeness I see in the example - how does that work? I shall take a another look before long.