====== std.qt5_core ======

Qt5-Core-Bindings: Widgets, Layouts, Signale/Slots (vereinfacht), Timer, Dialoge und Basissteuerelemente. Kern-UI-Toolkit für plattformübergreifende Desktopanwendungen.

→ [[lyx_-_programmiersprache:units:qt5_app|std.qt5_app]] · [[lyx_-_programmiersprache:units:qt5_gl|std.qt5_gl]] · [[lyx_-_programmiersprache:units|Standard Library]]

----

===== Typen =====

==== ITimerSpec (struct) ====

^ Feld ^ Typ ^
| ''tv_sec'' | ''int64'' |
| ''tv_nsec'' | ''int64'' |

==== QTimer (struct) ====

^ Feld ^ Typ ^
| ''fd'' | ''int64'' |
| ''intervalMs'' | ''int64'' |
| ''active'' | ''int64'' |
| ''callback'' | ''int64'' |

==== QtApp (struct) ====

^ Feld ^ Typ ^
| ''valid'' | ''int64'' |
| ''initialized'' | ''int64'' |

----

===== Funktionen =====

^ Signatur ^ Sichtbarkeit ^ Beschreibung ^
| ''QEnvironmentVariableIsSet(name: pchar): int64'' | pub | Check if environment variable is set |
| ''QEnvironmentVariableIsEmpty(name: pchar): int64'' | pub | Check if environment variable is empty |
| ''QTimerStart(intervalMs: int64): QTimer'' | pub | Create and start a periodic timer intervalMs: time in milliseconds between triggers Returns: QTimer handle |
| ''QTimerExpired(timer: QTimer): int64'' | pub | Check if timer has expired (non-blocking read) Returns: number of expirations, or 0 if no expiration pending |
| ''QTimerStop(timer: QTimer)'' | pub | Stop and close timer |
| ''QTimerIsActive(timer: QTimer): int64'' | pub | Check if timer is active |
| ''QTimerInterval(timer: QTimer): int64'' | pub | Get timer interval |
| ''QtAvailable(): int64'' | pub | Check if Qt Core library is available |
| ''QtVersion(): pchar'' | pub | Get Qt version string at runtime |
| ''QtVersionInt(): int64'' | pub | Get Qt version as integer (e.g., 0x050F00 for 5.15.0) |
| ''TimerLoop(intervalMs: int64, maxIterations: int64): void'' | pub | // Do other work here } QTimerStop(timer); |

----

//Signaturen automatisch aus ''std/qt5_core.lyx'' erzeugt (Stand 2026-08-02, lyxc 1.0.21A). Beschreibungen stammen aus den Quellkommentaren und sind teilweise unvollständig.//