A lightweight Windows desktop application for managing time-based events on a visual timeline. Built with pure Win32 API.

screenshot

• Visual Timeline: 24-hour timeline starting from 8:00 AM with 10-minute slots
• Event Management: Add, edit, and delete timeline entries with custom durations
• Zoom: Scale the timeline from 50% to 300% using Shift + Mouse Wheel or Shift + Arrow Keys
• Scrolling: Drag to scroll, or use A/D keys for horizontal navigation
• Auto-tracking: Timeline automatically scrolls to show current time
• Overlap Detection: Visual feedback (diagonal stripes) when time slots overlap
• Smart Display: Event blocks show time range only when space permits (3+ slots)
• Past Time Indicator: Grayed-out area indicates past, unavailable time slots

• Windows 7 or later
• No additional runtime dependencies required

• GCC (MinGW) with C++17 support
• Windows SDK

g++ -o sundial.exe main.cpp -std=c++17 -O2 -lgdi32 -luser32 -lcomdlg32 -lcomctl32 -municode -mwindows -finput-charset=UTF-8 -fexec-charset=UTF-8 -static

Or use the provided build script:

.\build.bat

1. Run sundial.exe
2. Add Event: Right-click on the timeline to open the dialog, then drag to select a time range
3. Edit Event: Left-click on an existing event block
4. Delete Event: Click on an event and select "Delete" when prompted
5. Scroll: Click and drag or use A/D keys
6. Zoom: Hold Shift and use mouse wheel or arrow keys

sundial/
├── main.cpp # Main application source code
├── README.md # This file
└── LICENSE # MIT License

Data is saved to %APPDATA%\sundial\data.txt in a simple text format.

MIT License - See LICENSE for details.

Contributions are welcome! Please feel free to submit a Pull Request.