TextEditor

A text editor with 2D transformations built in F# using Windows Forms and a custom lightweight control framework, based on the tutorial by Cisternino (Unipi).

Tutorial playlist: https://www.youtube.com/watch?v=iaKZSFkDZuI&list=PLH0ZF0pFNhGg5fa1g1V6yuoHgkWPCj80D

Features

• Interactive text editing with keyboard input (alphanumeric, space, Enter, Delete)
• Per-character transformations - each character can be individually positioned, rotated, and scaled
• Pan, zoom, and rotate the entire canvas via on-screen controls or function keys
• Font switching between multiple fonts per character
• Multi-selection with Ctrl modifier for bulk transformations
• Cursor animation with blinking effect
• Custom lightweight control framework (LWControl/LWContainer) with hit testing and event routing

Controls

Input	Action
Alphanumeric keys	Type characters
Enter	New line
Delete	Remove selected character
F1-F8	Movement and transformation shortcuts
Ctrl + click	Multi-select characters
▲▼◄► buttons	Navigate / translate
+/- buttons	Zoom in/out
L/R buttons	Rotate
F button	Switch font

Architecture

The project is composed of three layers:

• worldview.fsx - World-to-View matrix transformations (translate, rotate, scale)
• lvc.fsx - Lightweight control framework with abstract LWControl and LWContainer
• Tutorial.fsx - Editor logic: Carattere (character objects), Editor (editing surface), Controlli (navigation panel), ControlliEditor (transformation controls)

Tech stack

• F# on .NET Framework 4.6.1
• Windows Forms / GDI+ / System.Drawing.Drawing2D

License

Apache License 2.0 - see LICENSE for details.