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Re: Native Browser inside U++ Ctrl [message #62014 is a reply to message #62013]

Thu, 28 May 2026 19:33

forlano
Messages: 1244
Registered: March 2006
Location: Italy

Senior Contributor

zsolt wrote on Thu, 28 May 2026 17:23

Did you use a wrapper library like this one or use the platform's webviews solutions directly?

No, we do NOT use the webview wrapper. We use the platform's native APIs directly.

The reason is exactly what you might expect: webview is designed to create its own top-level window and run its own event loop via `webview::run()`. This makes it fundamentally incompatible with embedding inside an existing U++ `Ctrl` — two event loops cannot coexist in the same application.

Instead we call the platform APIs directly:

- **Windows**: `ICoreWebView2` COM API (WebView2 SDK). Loaded at runtime via `LoadLibrary("WebView2Loader.dll")` to avoid static linking issues with Clang. The WebView2 controller is created as a child of the `TopWindow` HWND.

- **macOS**: `WKWebView` (WebKit.framework) via Objective-C++ in a file that is kept completely separate from U++ code to avoid namespace conflicts between Cocoa types (`NSRect`, `NSPoint`) and U++ types (`Rect`, `Point`).

- **Linux**: `WebKitWebView` (webkit2gtk-4.1). Since U++ renders everything with Cairo on a single `GtkDrawingArea` (not a `GtkContainer`), true embedding is not possible without patching U++ core. We currently use a `GTK_WINDOW_TOPLEVEL` with `GDK_WINDOW_TYPE_HINT_UTILITY`, synchronized with the U++ window via `configure-event` and `focus-in/out` signals for correct z-order management.

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[Message index]

		Native Browser inside U++ Ctrl By: forlano on Sat, 23 May 2026 09:40
		Re: Native Browser inside U++ Ctrl By: forlano on Sat, 23 May 2026 12:28
		Re: Native Browser inside U++ Ctrl By: forlano on Sat, 23 May 2026 15:57
		Re: Native Browser inside U++ Ctrl By: forlano on Sat, 23 May 2026 21:34
		Re: Native Browser inside U++ Ctrl By: forlano on Sun, 24 May 2026 13:09
		Re: Native Browser inside U++ Ctrl By: zsolt on Thu, 28 May 2026 17:23
		Re: Native Browser inside U++ Ctrl By: forlano on Thu, 28 May 2026 19:33
		Re: Native Browser inside U++ Ctrl By: zsolt on Thu, 04 June 2026 02:24

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