Qt Drag & Drop: Add support for dragging files to the application's main window

Question

A lot of applications allow users to drag a file or files to the application's main window.

How do I add support for this feature in my own Qt application?

Answer 1

Overload dragEnterEvent() and dropEvent() in your MainWindow class, and call setAcceptDrops() in the constructor:

MainWindow::MainWindow(QWidget *parent) {     ..........     setAcceptDrops(true); }  void MainWindow::dragEnterEvent(QDragEnterEvent *e) {     if (e->mimeData()->hasUrls()) {         e->acceptProposedAction();     } }  void MainWindow::dropEvent(QDropEvent *e) {     foreach (const QUrl &url, e->mimeData()->urls()) {         QString fileName = url.toLocalFile();         qDebug() << "Dropped file:" << fileName;     } }