November 2022
Intermediate to advanced
1064 pages
25h 43m
German
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Kapitel 29: Multimediaanwendungen mit Qt
Dieses Kapitel gibt einen Einblick in die Programmierung von Multimediaanwendungen mit Qt. Wie verwendet man die verschiedenen Arten von Dialogboxen und das Widget zur Darstellung von Kalenderdaten? Wie kann man auf Live-Bilder der Kamera zugreifen und Videos abspielen? Wie bearbeitet man Bilder mit einem QPainter-Objekt?
29.1 Kalender und Textfeld – ein digitales Tagebuch
So funktioniert das digitale Tagebuch: Das Anwendungsfenster zeigt einen Kalender (Objekt der Klasse QCalendarWidget), auf dem man über Schaltflächen und durch Anklicken einer Zelle jedes beliebige Datum einstellen kann. Darunter ist ein Textfeld (Objekt der Klasse QTextEdit). Normalerweise – im Lesemodus – ist es schreibgeschützt. ...
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