multimedia: add qt6 version of the example

.gitignore

@@ -29,6 +29,7 @@ examples/libraries/extras-scintillaedit/extras-scintillaedit
 examples/libraries/qt-multimedia/qt-multimedia
 examples/libraries/qt-network/qt-network
 examples/libraries/qt-printsupport/qt-printsupport
+examples/libraries/qt6-multimedia/qt6-multimedia
 examples/libraries/restricted-extras-qscintilla/restricted-extras-qscintilla
 
 # android temporary build files

examples/libraries/qt6-multimedia/README.md

@@ -0,0 +1,3 @@
+The audio file `pixabay-public-domain-strong-hit-36455.mp3` in this directory was sourced from: https://pixabay.com/sound-effects/strong-hit-36455/
+
+It was placed into the public domain by the author @axilirate .

examples/libraries/qt6-multimedia/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+
+	qt "github.com/mappu/miqt/qt6"
+	"github.com/mappu/miqt/qt6/multimedia"
+)
+
+func main() {
+
+	qt.NewQApplication(os.Args)
+
+	srcFile, err := filepath.Abs("pixabay-public-domain-strong-hit-36455.mp3")
+	if err != nil {
+		panic(err)
+	}
+
+	player := multimedia.NewQMediaPlayer()
+	output := multimedia.NewQAudioOutput()
+
+	player.SetAudioOutput(output)
+	player.SetSource(qt.QUrl_FromLocalFile(srcFile))
+	output.SetVolume(50)
+	player.OnPlaybackStateChanged(func(s multimedia.QMediaPlayer__PlaybackState) {
+
+		log.Printf("- Playback state: %v", s)
+
+		if s == multimedia.QMediaPlayer__StoppedState {
+			log.Printf("Playback complete.")
+			qt.QCoreApplication_Exit()
+		}
+	})
+
+	log.Printf("Playback starting...")
+	player.Play()
+
+	qt.QApplication_Exec()
+}