Touch Gesture Support for Handheld PCs

📋 Summary

Add support for touch swipe and pinch gestures in LaunchBox and Big Box on Windows handheld PCs. While touch targets (like tapping to select or double-tap to launch) already work, swipe scrolling and zoom gestures are not currently supported.

❗ Problem

• On devices like the ROG Ally, Lenovo Legion Go and other handheld PCs, users often rely on touch input instead of a mouse.

• Windows itself supports swipe gestures (e.g., scrolling in File Explorer), but LaunchBox doesn’t recognize them.

• Without gesture support, navigating large libraries or zooming into artwork/videos is clunky and unintuitive.

💡 Proposal

• Add support for touch gestures across LaunchBox and Big Box:

  • Swipe/drag to scroll through platforms, playlists, or game lists.

  • Pinch-to-zoom for images, box art, and screenshots.

  • Smooth scrolling in both list and grid views.

  • Double-tap/tap to launch a game (already supported).

🧩 Use Cases

• Browsing a large NES library on a Windows handheld by swiping left/right or up/down, without needing a mouse or controller.

• Flicking through platforms like PlayStation, Arcade, or SNES quickly using touch.

• Pinching to zoom into cover art or screenshots for a closer look.

• Sitting in tablet mode on a Surface or handheld and navigating your library entirely with touch gestures.

📦 Benefits

• Provides a more natural navigation experience for handheld PC users.

• Makes LaunchBox more competitive with frontends that already support touch navigation.

• Improves accessibility and usability for players who prefer touch over controllers or keyboards.