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/Breakout/Breakout.kn

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

klyn samples/TerminalResize.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