updating viewport

examples/README.md

@@ -43,6 +43,24 @@ python simple_ereader_example.py tests/data/test.epub
 python ereader_demo.py tests/data/test.epub
 ```
 
+## Browser Examples
+
+### HTML Browser with Viewport System
+
+**`html_browser_with_viewport.py`** (located in `pyWebLayout/examples/`) - Full-featured HTML browser using the viewport system:
+```bash
+python pyWebLayout/examples/html_browser_with_viewport.py
+```
+
+This demonstrates:
+- Viewport-based scrolling (mouse wheel, keyboard, scrollbar)
+- Efficient rendering of large documents
+- Text selection and clipboard support
+- Navigation and history management
+- Interactive HTML viewing
+
+For detailed information about the viewport system, see `README_BROWSER_VIEWPORT.md`.
+
 ## Other Examples
 
 ### HTML Rendering
@@ -60,6 +78,7 @@ For detailed information about HTML rendering, see `README_HTML_MULTIPAGE.md`.
 
 - `README_EREADER.md` - Detailed EbookReader API documentation
 - `README_HTML_MULTIPAGE.md` - HTML multi-page rendering guide
+- `README_BROWSER_VIEWPORT.md` - Browser viewport system documentation
 - `pyWebLayout/layout/README_EREADER_API.md` - EbookReader API reference (in source)
 
 ## Debug/Development Scripts