maturita.c

An educational application written in C using GTK 4.

Description

maturita.c is an educational program for high-school and gymnasium students preparing for their maturita exam. The UI is available in Czech and English and is built as a single C file (maturita.c) that renders a modern, CSS-styled GTK 4 interface.

Screenshots

Welcome screen	Subjects ("Předměty")	German learning roadmap

Features

• Welcome screen – branded greeting with a description of the program and a continue button to get started
• Subjects ("Předměty") – adaptive serpentine subject map with 13 subjects
  • Deutsch is open (round bubble with the German flag) and opens the German learning path
  • Správa počítačových sítí / Computer Network Administration is open too (marked "IP") and leads to a 30-unit computer-networks path whose first unit, Výpočet IP adres / IP Address Calculation, is playable; the rest are locked placeholders
  • the remaining subjects are dimmed/locked placeholders until their content is added
  • layout folds into multiple rows when the window is narrow
• Learning roadmap – adaptive serpentine learning path with 10 units
  • each unit numbered and labeled with its topic (e.g. "Neue Freunde")
  • units 1–3 are open; completed units shown in green with a checkmark
  • remaining units dimmed with a lock icon
  • finish node at the end of the path
  • layout folds into multiple rows when the window is narrow
• Back navigation – themed circular back button (top-left) returns to the previous screen
• Unit 1 exercises – "Neue Freunde" opens an interactive bubble map with 13 exercises (dialogs, sentence building, multiple choice, free answers, numbers, verb conjugation, greeting sorting and more), each with German prompts and an instant-check button
• Unit 2 exercises – "Aus aller Welt" is playable from the start (no need to finish unit 1 first) and offers a bubble map with 19 exercises: verb conjugation, prepositions aus/in, question words, nationalities and countries, spelling/look-and-find tasks, a matching exercise, a number/word game, free-answer "Steckbrief" tasks and a Hangman game with 5 professions
• Unit 3 exercises – "Bei uns zu Hause" covers family vocabulary, possessives, accusative and related grammar across 15 exercises (drop-down sentence fill-ins, word building, "Was siehst du?", sentence ordering and missing-letter sentences)
• Hints & model answers – in exercises where you write or complete a German sentence the Czech meaning is shown right away as a hint, and clicking the check button also reveals the correct German sentence so you can compare
• Computer networks ("Výpočet IP adres") – the first networks unit contains a 4-slide walkthrough of IP subnetting (masks, host ranges, VLSM) followed by a practice sheet with four subnetting tasks; each task has a "show solution" button with a worked answer key
• Progress tracking – completed exercises are marked green; progress is saved per unit to progress/unit1.conf, progress/unit2.conf and progress/unit3.conf and restored on startup
• Statistics – chart icon in the header opens a per-subject progress overview: summary totals (exercises done, percent, finished units) at the top, then every subject with its own progress bar (subjects without content yet are shown as locked), and a per-unit breakdown with progress bars for Deutsch; numbers update as soon as you finish an exercise
• Settings – gear icon in the top-right header opens a panel where you can choose:
  • mode: dark or light, as a segmented control
  • theme: 10 palettes picked from a grid of color swatches
  • language: Czech or English, applied instantly without a restart
  • all three preferences are stored in progress/settings.conf
• Keyboard quit shortcuts – Super/Cmd+Q or Alt+F4 closes the app
• Single-file C codebase, cross-platform (Linux and macOS supported)

Installation

Prerequisites

1. GTK 4 development libraries

macOS:

brew install gtk4

Linux (Debian / Ubuntu):

sudo apt install libgtk-4-dev

Linux (Fedora):

sudo dnf install gtk4-devel

Linux (Arch):

sudo pacman -S gtk4

2. Build tools (compiler, Make, pkg-config)

macOS – install all of these explicitly, they are not preinstalled:

# installs the GNU C compiler, Make, and pkg-config
brew install gcc make pkg-config
# if you prefer Apple's Clang toolchain instead, you can run:
# xcode-select --install

Linux – no need to install gcc, it is already preinstalled on most distributions (it ships with build-essential/base-devel):

# Debian / Ubuntu: make sure you have the base toolchain and pkg-config
sudo apt install build-essential pkg-config

# Fedora
sudo dnf groupinstall "Development Tools"
sudo dnf install pkgconf-pkg-config

# Arch
sudo pacman -S base-devel pkgconf

Building the Application

1. Clone or download this repository
2. Navigate to the project directory
3. Build using the provided Makefile:

make

Or manually:

gcc -o maturita maturita.c `pkg-config --cflags --libs gtk4` -lm

Running the Application

make run

or

./maturita

Usage

When launched, the application shows the welcome screen. From there:

1. Click "Pokračuj" / "Continue" to open the Předměty / Subjects map.
2. Click the Deutsch bubble (German flag) to open the German learning roadmap, or the IP bubble ("Správa počítačových sítí") for the computer-networks path. Other subjects are still locked.
3. Browse the units along the path; the roadmap reflows into rows and scrolls if the window is too narrow.
4. Click the "Neue Freunde" node to open unit 1, "Aus aller Welt" for unit 2 or "Bei uns zu Hause" for unit 3, then pick any bubble to start an exercise. Units 2 and 3 are available even if the earlier units are not finished yet.
5. On the networks path, open "Výpočet IP adres" (the first unit) to walk through four slides on IP subnetting; the final slide leads to the practice sheet with four subnetting tasks and per-task "show solution" answers.
6. Use the back button in the top-left corner to return to the previous screen.
7. Open Statistiky / Statistics (chart icon, top-right) to see progress grouped per subject (overall totals plus, for Deutsch, a per-unit breakdown).
8. Open Nastavení / Settings (gear icon, top-right) to switch dark/light mode, pick a color theme, or change the interface language.

Units 1–3 are currently implemented. Locked units do nothing – they are placeholders until lessons are added. Completed exercises stay green and are saved per unit to progress/unit1.conf / progress/unit2.conf / progress/unit3.conf (created next to the app on first finish).

Keyboard shortcuts

Shortcut	Action
Super/Cmd + Q	Quit application
Alt + F4	Quit application

Project structure

maturita.c              entire application (UI, navigation, themes, exercises)
Makefile                build & run targets
README.md               this file
LICENSE                 GPL-3.0 license
progress/               created at runtime
  unit1.conf            unit 1 exercise completion state
  unit2.conf            unit 2 exercise completion state
  unit3.conf            unit 3 exercise completion state
  settings.conf         theme, dark/light mode and language preference

Theming

The app ships with ten palettes – Catppuccin, Nord, Dracula, Rose Pine, Ocean, Gruvbox, Solarized, Everforest, Monokai and One Dark – each available in dark and light mode. Colors are defined as theme palettes in maturita.c and applied through a generated CSS stylesheet (plus matching Cairo colors for the roadmap rails and icons).

Change the look from the in-app settings panel, or edit the palette tables / build_theme_css() in maturita.c and rebuild.

Languages

The interface can be switched between Czech and English from the settings panel; the choice takes effect immediately and is remembered between runs. Translations live in two tables in maturita.c: tr_ui holds interface strings under short keys, while tr_content translates the Czech meanings shown next to the German exercise items and uses the Czech text itself as the key. Widgets are registered with i18n_bind() so apply_language() can retranslate them in place.

German prompts, unit names and exercise titles are learning material and stay German in both languages.

To-Do Plans

Future enhancements planned for maturita.c:

• Wire unit nodes to actual German vocabulary/grammar exercises
  • Unit 1 ("Neue Freunde") – 13 interactive exercises with progress saving
  • Unit 2 ("Aus aller Welt") – 19 interactive exercises (incl. Hangman)
  • Unit 3 ("Bei uns zu Hause") – 15 interactive exercises
• Lesson progression and unlock system for the remaining units
• Add audio pronunciation features
• Add user settings panel (theme, dark/light mode, language)
• Implement spaced repetition system for vocabulary
• Add listening and reading comprehension exercises
• Add writing practice with feedback
• Expand progress tracking with statistics
• Move CSS styling to an external file
• Split the UI code into multiple files
• Add internationalization support (Czech and English)
• Add more interface languages
• Add unit testing framework

License

This project is licensed under the GPL3.0 License - see the LICENSE file for details.

Acknowledgments

• Created as a learning exercise in C and GTK programming
• Inspired by language learning applications
• Built with GTK 4 for modern GUI development