Qt drop a file | mac os - c++

Question

I've done many searches (leading me to this and that) and adding a few lines to my classes
MainWindow.cpp
#include <QtGui/QDragEnterEvent>
#include <QtGui/QDragLeaveEvent>
#include <QtGui/QDragMoveEvent>
#include <QtGui/QDropEvent>
#include <QtCore/QMimeData>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent)
{
....
setAcceptDrops(true);
}
void MainWindow::dragEnterEvent(QDragEnterEvent *event)
{
event->acceptProposedAction();
}
void MainWindow::dropEvent(QDropEvent *event)
{
qDebug() << "On Drop Event";
const QMimeData* mimeData = event->mimeData();
if (mimeData->hasUrls())
{
QStringList pathList;
QList<QUrl> urlList = mimeData->urls();
for (int i = 0; i < urlList.size() && i < 32; ++i)
{
pathList.append(urlList.at(i).toLocalFile());
}
if(openFiles(pathList))
event->acceptProposedAction();
}
}
void MainWindow::dragMoveEvent(QDragMoveEvent * event)
{
event->acceptProposedAction();
}
void MainWindow::dragLeaveEvent(QDragLeaveEvent* event)
{
event->accept();
}
But I can't drop a file onto my MainWindow (from the finder). It's not that my code crashes or does not compile, it's just that I literally can't. No reaction from the MainWindow, no highlight, nothing.
What am I missing?

Answer 1

I suspect you should also be overloading the dragMoveEvent: -
void QWidget::dragMoveEvent(QDragMoveEvent * event)
As the docs state: -
This event handler is called if a drag is in progress, and when any of the following conditions occur: the cursor enters this widget, the cursor moves within this widget, or a modifier key is pressed on the keyboard while this widget has the focus. The event is passed in the event parameter.
There's an example of a Qt drag and drop here. Specifically this is a good reference.