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Posted By

shadevampire on 09/05/11


Tagged

file files directory and drop drag directories Qt


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Qt drag and drop files or directories

 / Published in: C++
 

You have to implement 2 protected virtual methods in your widget you want to accept file or directory drops: - void dragEnterEvent(QDragEnterEvent *event) - void dropEvent(QDropEvent *event)

And also you have to call setAcceptDrops(true); on this widget before it could accept drops.

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  1. void MainWindow::dragEnterEvent(QDragEnterEvent *event)
  2. {
  3.     if(event->mimeData()->hasUrls()) {
  4.         event->acceptProposedAction();
  5.     }
  6. }
  7.  
  8. void MainWindow::dropEvent(QDropEvent *event)
  9. {
  10.     QList<QUrl> droppedUrls = event->mimeData()->urls();
  11.     int droppedUrlCnt = droppedUrls.size();
  12.     for(int i = 0; i < droppedUrlCnt; i++) {
  13.         QString localPath = droppedUrls[i].toLocalFile();
  14.         QFileInfo fileInfo(localPath);
  15.         if(fileInfo.isFile()) {
  16. // file
  17.             QMessageBox::information(this, tr("Dropped file"), fileInfo.absoluteFilePath());
  18.         }
  19.         else if(fileInfo.isDir()) {
  20. // directory
  21.             QMessageBox::information(this, tr("Dropped directory"), fileInfo.absoluteFilePath());
  22.         }
  23.         else {
  24. // none
  25.             QMessageBox::information(this, tr("Dropped, but unknown"), tr("Unknown: %1").arg(fileInfo.absoluteFilePath()));
  26.         }
  27.     }
  28.  
  29.     event->acceptProposedAction();
  30. }

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