GUI: Allow dropping video files onto the window

src/GUIWindow.cpp

@@ -404,6 +404,9 @@ GUIWindow::GUIWindow(QWidget *parent)
     qRegisterMetaType<D2V>();
 
 
+    setAcceptDrops(true);
+
+
     setWindowTitle("D2V Witch v" PACKAGE_VERSION);
 
 
@@ -1086,6 +1089,43 @@ void GUIWindow::createVapourSynthFilterChain() {
 }
 
 
+void GUIWindow::dragEnterEvent(QDragEnterEvent *event) {
+    if (event->mimeData()->hasUrls())
+        event->acceptProposedAction();
+}
+
+
+void GUIWindow::dropEvent(QDropEvent *event) {
+    QList<QUrl> urls = event->mimeData()->urls();
+
+    QStringList paths;
+    paths.reserve(urls.size());
+
+    for (int i = 0; i < urls.size(); i++)
+        if (urls[i].isLocalFile())
+            paths.push_back(urls[i].toLocalFile());
+
+    if (!paths.size())
+        return;
+
+    paths.sort();
+
+    fake_file.close();
+
+    for (int i = 0; i < paths.size(); i++) {
+        input_list->addItem(paths[i]);
+        fake_file.push_back(paths[i].toStdString());
+    }
+
+
+    clearUserInterface();
+
+    inputFilesUpdated();
+
+    event->acceptProposedAction();
+}
+
+
 IndexingWorker::IndexingWorker(const QString &_d2v_file_name, FILE *_d2v_file, const D2V::AudioFilesMap &_audio_files, FakeFile *_fake_file, FFMPEG *_f, AVStream *_video_stream, D2V::ColourRange _input_range, GUIWindow *_window)
     : d2v(_d2v_file_name.toStdString(), _d2v_file, _audio_files, _fake_file, _f, _video_stream, _input_range, ::updateProgress, _window, ::logMessage, _window)
 {

src/GUIWindow.h

@@ -101,6 +101,8 @@ class GUIWindow : public QMainWindow {
     void initialiseVapourSynth();
     void freeVapourSynth();
     void createVapourSynthFilterChain();
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dropEvent(QDropEvent *event);
 
 public:
     explicit GUIWindow(QWidget *parent = 0);