A sleek, modern digital clock application built with C++ and SFML 3.0. It features a borderless window with rounded corners, a thin visual cyan border, and professional window management including multi-monitor fullscreen support.

• Borderless & Transparent: A clean, modern look without standard Windows title bars or borders.
• Rounded Corners: Smooth 20px rounded window corners implemented via Win32 API.
• Smart Resizing: Custom-built resizing logic with enlarged corner hitboxes for easier handling.
• Multi-Monitor Fullscreen: Toggling fullscreen (Alt+Enter) respects the monitor the window is currently on.
• Proportional Scaling: The clock and date automatically scale to fit the window while maintaining a perfect aspect ratio.
• Embedded Assets: The DSEG7 font is embedded directly into the executable for single-file portability.

The application uses sf::Style::None to create a borderless window. Since this disables standard OS features, the following were manually implemented:

• Custom Dragging: Window can be moved by clicking and dragging anywhere in the center.
• Manual Resizing: Implemented via edge-detection logic:
  • Gutter (8px): Used for horizontal and vertical resizing handles along the sides.
  • Corner Zones (30px): Enlarged hit-areas in the corners to make diagonal resizing much more responsive.
• Window Shaping: Uses the Win32 SetWindowRgn and CreateRoundRectRgn to physically mask the window, making the areas outside the rounded corners transparent and "click-through."

The clock's size is dynamically calculated to ensure it remains legible and aesthetically pleasing at any window size:

• Target Aspect Ratio: The clock is designed around a 5.5:1 ratio.
• Dynamic Font Size: The font size is derived from the available height (windowHeight * 0.8), ensuring the digits stay large.
• Letterboxing: If the window is too wide or too tall, the layout adds proportional padding to center the clock.
• Date Positioning: The date is automatically centered and positioned below the time with a font size 25% of the main digits.

SFML's default fullscreen can sometimes jump to the primary monitor. This app uses Win32's MonitorFromWindow to identify the current display and creates a borderless window that perfectly matches that monitor's specific resolution and position.

• Alt + Enter: Toggle borderless fullscreen mode on the current monitor.
• Escape: Exit fullscreen and return to the last windowed position/size.
• Click & Drag: Move the windowed clock around the desktop.
• Edges & Corners: Resize the window (diagonal handles available in 30px corner radius).

• C++ Compiler: MinGW-w64 (g++) suggested.
• SFML 3.0.2: Statically linked (Graphics, Window, System).
• CMake: 3.16+ recommended for configuration.

# Configure
cmake -B build -G "MinGW Makefiles"

# Build
cmake --build build

# Run
.\build\DigitalClock.exe

• main.cpp: Core application logic, window management, and rendering.
• FontData.h: Compressed DSEG7 font binary data.
• CMakeLists.txt: Project configuration and dependency linking.
• .vscode/: Pre-configured tasks for quick compilation and debugging.

• Font: DSEG7 Classic by Keshikan (Open Font License).
• Framework: SFML (Simple and Fast Multimedia Library).