QML and QFileSystemModel how to get the current path+file as a String to use as a source for Mediaplayer

[Markus Ippy]

Hello i am trying to use qt multimedia to build a simple mp3 player in a single window . I am using QFileSystemModel in C++ to show the file system in QML == > this works so far
I can browse through the file system but i can not use the data further .

1. How can i get the filepath from the treeview ? So i can set it as a source for the media player ?
2. Is there a way to tell mediaplayer to play all the mp3 files for a directory

my Main.cpp

#include <QApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QtQml>
#include <QFileSystemModel>


int main(int argc, char *argv[])
{
QApplication app(argc, argv);
app.setOrganizationName("Power-Tune");
app.setOrganizationDomain("power-tune.org");
app.setApplicationName("PowerTune");

QQmlApplicationEngine engine;
//
QFileSystemModel model;
model.setRootPath("/");
engine.rootContext()->setContextProperty("my_model", &model);
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
return app.exec();

}

my main QML

import QtQuick 2.8
import QtQuick.Controls 2.1
import QtQuick.Layouts 1.1
import QtQuick.Controls 1.4
import QtMultimedia 5.8

ApplicationWindow {
visible: true
width: 800
height: 480
minimumWidth: 800
minimumHeight: 480
title: qsTr("PowerTune ")
color: "black"

Rectangle {
    width: parent.width
    height: parent.height
    property bool playing: false

    MediaPlayer {
        id: playMusic
        autoPlay: false
        volume: 0.5
    }

    Button {
        id: previous
        text: "previous"
        width: 100
        anchors.right: playpause.left
        // Here i would like to go to the previous *.mp3 file in the current folder
        //onClicked:
   }
    Button {
        id: playpause
        text: "play/pause" //playing ? "Stop music" : "Start music"
        width: 100
        anchors.right: next.left

        onClicked:{
            if(playMusic.status == 6) {
                playMusic.stop()
            } else {
                playMusic.play()
            }
        }
    }

    Button {
        id: next
         text: "next"
        width: 100
        anchors.right: parent.right
        // Here i would like to go to the next *.mp3 file in the current folder
        //onClicked:
  }


TreeView {
    id:mp3selector
    width: parent.width/2
    height: parent.height
    visible: true
    TableViewColumn {
        title: "Name"
        role: "fileName"
        width: 300
    }
    model: my_model
    //Here i would like to set the source of the MediaPlayer with the current selection
    //onActivated: playMusic.source = 
}
}
}

[Diracsbracket]

@Markus-Ippy said in QML and QFileSystemModel how to get the current path+file as a String to use as a source for Mediaplayer:

How can i get the filepath from the treeview ? So i can set it as a source for the media player ?

The answer can be found in this QtQuick example:
https://doc.qt.io/qt-5.10/qtquickcontrols-filesystembrowser-example.html

The solution is create a class derived from QFileSystemModel and add your own methods to interface to QML to get the file info. This seems fairly simple, glancing at the example.

Is there a way to tell mediaplayer to play all the mp3 files for a directory

The way seems to be to set the playlist property of the MediaPlayer to some PlayList type object you must create and by adding all the supported files in the directory to it.