[bug] can resize only from top when no decorations

[thewh1teagle]

Describe the bug

When using latest tauri from dev branch with multiwebview and deocrations(false)
I can't resize the window from left / right / bottom. I can resize only from top edge.

Reproduction

add decorations(false) to multiwebview example

Run multiwebview example

cargo run --example multiwebview --features="unstable"

Expected behavior

We should be able to resize the window from left / right / bottom corners as well.

Full tauri info output

WARNING: no lock files found, defaulting to npm

[✔️] Environment
    - OS: Windows 10.0.22631 X64
    ✔️ WebView2: 122.0.2365.92
    ✔️ MSVC: Visual Studio Community 2022
    ✔️ rustc: 1.75.0 (82e1608df 2023-12-21)
    ✔️ cargo: 1.75.0 (1d8b05cdd 2023-11-20)
    ✔️ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔️ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
    - node: 18.17.1
    - npm: 9.6.7

[-] Packages
    - tauri [RUST]: git+https://github.com/thewh1teagle/tauri?branch=dev1#e9cb74ccf72b33d8dcf8d31ec12202bcff82dc4e (2.0.0-beta.13)
    - tauri-build [RUST]: no manifest (2.0.0-beta.10, 2.0.0-beta.10)
    - wry [RUST]: 0.37.0
    - tao [RUST]: 0.26.1
    - tauri-cli [RUST]: 1.5.9
    - @tauri-apps/api : not installed!
    - @tauri-apps/cli [NPM]: 2.0.0-beta.1

[-] App
    - build-type: bundle
    - CSP: unset

Stack trace

No response

Additional context

It doesn't happen in helloworld example

[amrbashir]

when using multiwebview, you need to do the resizing yourself. You could also leave 1px around the edge so the underlying window could catch clicks there and provide resizing.

[thewh1teagle]

@amrbashir

when using multiwebview, you need to do the resizing yourself.

How should I handle resize myself from left / right bottom in multiwebview window?

You could also leave 1px around the edge so the underlying window could catch clicks there and provide resizing.

Sounds good, I understand that the webviews should leave some space (1px) in left / right / bottom edges.
Can I use auto_resize() (exposed from webviews) along with that? or I still need to handle resize myself?

[amrbashir]

@amrbashir

when using multiwebview, you need to do the resizing yourself.

How should I handle resize myself from left / right bottom in multiwebview window?

you need to detect the clicks where you want to do resizing and then call https://docs.rs/tauri/2.0.0-beta.13/tauri/test/struct.MockWindowDispatcher.html#method.start_resize_dragging

You could also leave 1px around the edge so the underlying window could catch clicks there and provide resizing.

Sounds good, I understand that the webviews should leave some space (1px) in left / right / bottom edges. Can I use auto_resize() (exposed from webviews) along with that? or I still need to handle resize myself?

auto_resize should work in this case

[thewh1teagle]

I tried and created window with decoration(false) and kept 2px space around the webview for resizing,
But only top / left edges was resizable - right and bottom edges aren't.
Looks like some bug in windows, you can see the white space in left / top but not in right / bottom.

screenshot

main.rs

use std::str::FromStr;
use tauri::{LogicalPosition, LogicalSize, Url, WebviewBuilder};

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
  tauri::Builder::default()
    .setup(|app| {

      // Create main window
      let width = 800.;
      let height = 600.;
      let window = tauri::window::WindowBuilder::new(app, "main")
        .decorations(false)
        .inner_size(width, height)
        .build()?;

      // Create webviews  
      let webview = WebviewBuilder::new(
        "app", 
        tauri::WebviewUrl::External(Url::from_str("https://tauri.app/").unwrap())
      ).auto_resize();
      let edge_space = 2.;
      let size = LogicalSize::new(width - edge_space, height - edge_space);
      let position = LogicalPosition::new(0 + edge_space as u32, 0 + edge_space as u32);
      window.add_child(webview, position, size).unwrap();
      
      Ok(())
    })
    .run(tauri::generate_context!())
    .expect("error while running tauri application");
}

tauri info

WARNING: no lock files found, defaulting to npm

[✔] Environment
    - OS: Windows 10.0.22631 X64
    ✔ WebView2: 123.0.2420.65
    ✔ MSVC: Visual Studio Community 2022
    ✔ rustc: 1.75.0 (82e1608df 2023-12-21)
    ✔ cargo: 1.75.0 (1d8b05cdd 2023-11-20)
    ✔ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
    - node: 18.17.1
    - npm: 9.6.7

[-] Packages
    - tauri [RUST]: 2.0.0-beta.13
    - tauri-build [RUST]: 2.0.0-beta.10
    - wry [RUST]: 0.37.0
    - tao [RUST]: 0.26.2
    - tauri-cli [RUST]: 1.5.9
    - @tauri-apps/api : not installed!
    - @tauri-apps/cli [NPM]: 2.0.0-beta.1

[-] App
    - build-type: bundle
    - CSP: unset