Code Examples

A first Klyn program built as a launch countdown. It introduces an explicitly typed variable, a while loop, decrementing, and console output before lift-off.

klyn samples/HelloWorld.kn

A larger sample entry point intended to exercise application-level composition and reusable language-level building blocks.

klyn samples/MegaGame.kn

A compact shape hierarchy showing classes, constructors, inheritance, overriding, and polymorphic calls in idiomatic Klyn.

klyn samples/POO.kn

Stores typed game settings in a HashSet, writes them as a formatted JSON array beside the sample, then reloads the file and reconstructs the set.

klyn samples/io/JsonConfig.kn

Exports the people and monthly activity data from the XLSX example as a structured DOM document beside the sample, then parses the result back for verification.

klyn samples/io/ExportXML.kn

Creates an XLSX workbook with a people directory, a second activity worksheet, and a line chart based on the exported monthly values.

klyn samples/io/ExportXLSX.kn

A console MariaDB login flow using DriverManager, try-with-resources, and a prepared update statement.

klyn samples/sql/Login.kn

Builds a MariaDB article catalog with the Klyn Entity Engine, creates its schema, persists demonstration entities transactionally, and executes typed KQL price queries from a desktop GUI. A configured MariaDB database is required.

klyn samples/sql/Entities.kn

A compact graphical application showing event handling, widgets, and simple interaction patterns.

klyn samples/gui/Calculator.kn

A custom speedometer widget built with Canvas, gradients, antialiased painting, sliders, and signal-property bindings.

klyn samples/gui/SpeedDemoWindow.kn

An analog clock implemented as a custom Canvas widget. It combines gradients, antialiased painting, time-based geometry, and a GUI Timer that repaints once per second.

klyn samples/gui/ClockSample.kn

Shows slider variants: filled track, ticks, values, vertical orientation, and live value tooltip during pointer drag.

klyn samples/gui/SliderSample.kn

Shows the standard calendar popup and the quickEditMode workflow where the user selects a year, a month, then a day.

klyn samples/gui/DatePickerSample.kn

Demonstrates typed modal lightboxes for opening one or more files, choosing a save destination, and selecting a folder inside the application window.

klyn samples/gui/FileDialogsSample.kn

Lists operating-system fonts in an embedded lightbox with per-family previews and applies the selected typed Font value to a widget.

klyn samples/gui/FontDialogSample.kn

Demonstrates a desktop menu bar with File, Edit, and Help menus, mnemonic labels, shortcuts, icons, separators, and typed action events.

klyn samples/gui/MenuBarSample.kn

Embeds a TerminalWidget in a desktop window, demonstrates cwd tracking, multi-tab terminals, and the compact singleTerminal mode.

klyn samples/gui/TerminalWidgetSample.kn

Embeds a styled HTML document with asynchronous navigation, retained rendering, history, and deterministic DOM scripting.

klyn samples/gui/BrowserWidgetSample.kn

A MariaDB-backed login window using FormLayout, password input, default-button behavior, buddies, and prepared statements.

klyn samples/gui/LoginForm.kn

Demonstrates the reusable ColorPicker, its RGB, HSV, HSL, color-wheel and spectrum modes, plus the standalone dialog and embedded lightbox hosts.

klyn samples/gui/ColorPickerSample.kn

Shows Binding.twoWay between sliders and spin boxes, plus Binding.watch to repaint a live color preview.

klyn samples/gui/ColorChooser.kn

Refactors the color editor into reusable color lines that expose a bindable value signal property, while keeping the live preview synchronized.

klyn samples/gui/ColorChooser2.kn

A larger GUI sample with a modal connection lightbox, split views, a schema tree, closable tabs, live database schema discovery, editable table models, read-only views, and an SQL editor with schema-aware completion.

klyn samples/gui/dbexplorer/DatabaseExplorer.kn

A resizable vector game built around one custom canvas, a fixed-step animation loop, direct mouse and keyboard input, four levels, brick effects, and falling bonuses.

klyn samples/gui/Breakout/Start.kn

A multi-file terminal game. It is useful for understanding how a larger Klyn sample is split into several classes and views.

klyn samples/tui/Breakout/Breakout.kn

Focuses on terminal resize behavior and is useful when validating layout and event-loop behavior on a new platform.

klyn samples/tui/TerminalResize.kn

A colorful terminal arcade game with keyboard input, animated food and particles, and responsive layout. Press Space to start, then steer with the arrow keys or WASD. Read the sample to see how a terminal widget combines input, game state, and rendering.

klyn samples/tui/Snake.kn

Uses a generic class logger, structured fields, scoped context, and a timed span while a multi-handler writes the same events to the console and a file beside the sample. See the Logging tutorial for configuration and handler details.

klyn samples/logging/MoonMissionLogs.kn

Runs equivalent Python, Klyn, and C++20 programs three times, compares cold and warm Klyn startup, and generates a self-contained HTML performance report.

klyn samples/perf/Benchmark.kn

Exercises the language-level LLM helpers. This sample normally requires provider configuration and valid credentials. See the LLM API and Agents tutorial for the underlying request model.

klyn samples/llm.kn

Shows an LLM-backed financial agent sample and is a good place to inspect how domain logic can be combined with annotated tools and the agent loop described in the LLM API and Agents tutorial.

klyn samples/Financial.kn