From ce925bc73e077fea813e509af4e9ad19f4306960 Mon Sep 17 00:00:00 2001
From: Tom Tanner <thosrtanner2@users.sourceforge.net>
Date: Sun, 26 Apr 2015 09:44:57 +0100
Subject: Allows drag-and-drop into the download tab

---
 src/mainwindow.cpp | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)

(limited to 'src/mainwindow.cpp')

diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 1566bc8a..945b258c 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -110,6 +110,7 @@ along with Mod Organizer.  If not, see <http://www.gnu.org/licenses/>.
 #include <QJsonArray>
 #include <QJsonObject>
 #include <QJsonValue>
+#include <QMimeData>
 #if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QtConcurrent/QtConcurrentRun>
 #else
@@ -4547,3 +4548,119 @@ void MainWindow::on_manageArchivesBox_toggled(bool)
 {
   m_OrganizerCore.refreshBSAList();
 }
+
+void MainWindow::dragEnterEvent(QDragEnterEvent *event)
+{
+  //Accept copy or move drags to the download window. Link drags are not
+  //meaningful (Well, they are - we could drop a link in the download folder,
+  //but you need privileges to do that).
+  if (ui->downloadTab->isVisible() &&
+      (event->proposedAction() == Qt::CopyAction ||
+       event->proposedAction() == Qt::MoveAction) &&
+      event->answerRect().intersects(ui->downloadTab->rect())) {
+
+    //If I read the documentation right, this won't work under a motif windows
+    //manager and the check needs to be done at the drop. However, that means
+    //the user might be allowed to drop things which we can't sanely process
+    QMimeData const *data = event->mimeData();
+
+    if (data->hasUrls()) {
+      QStringList extensions =
+                m_OrganizerCore.installationManager()->getSupportedExtensions();
+
+      //This is probably OK - scan to see if these are moderately sane archive
+      //types
+      QList<QUrl> urls = data->urls();
+      bool ok = true;
+      for (auto url : urls) {
+        if (url.isLocalFile()) {
+          QString local = url.toLocalFile();
+          bool fok = false;
+          for (auto ext : extensions) {
+            if (local.endsWith(ext, Qt::CaseInsensitive)) {
+              fok = true;
+              break;
+            }
+          }
+          if (! fok) {
+            ok = false;
+            break;
+          }
+        }
+        //We should probably allow the user to drop urls here and remember the
+        //url for installing later.
+      }
+      if (ok) {
+        event->accept();
+      }
+    }
+  }
+}
+
+void MainWindow::dropEvent(QDropEvent *event)
+{
+  Qt::DropAction action = event->proposedAction();
+  QString output_dir = m_OrganizerCore.downloadManager()->getOutputDirectory();
+  if (action == Qt::MoveAction) {
+    //Tell windows I'm taking control and will delete the source of a move.
+    event->setDropAction(Qt::TargetMoveAction);
+  }
+  for (auto url : event->mimeData()->urls()) {
+    QFileInfo file(url.toLocalFile());
+    QString target = output_dir + "/" + file.fileName();
+    //FIXME: Check here if the file exists and offer a rename
+    if (QFile::exists(target)) {
+      //Make this box have 2 buttons:
+      //'overwrite' and 'rename'
+      //for copy it's ok to add a 'do nothing' button
+      QMessageBox box(QMessageBox::Question,
+                      file.fileName(),
+                      tr("A file with the same name has already been downloaded. "
+                         "What would you like to do?"));
+      box.addButton(tr("Overwrite"), QMessageBox::ActionRole);
+      box.addButton(tr("Rename new file"), QMessageBox::YesRole);
+      box.addButton(tr("Ignore file"), QMessageBox::RejectRole);
+
+      box.exec();
+      QMessageBox::ButtonRole role = box.buttonRole(box.clickedButton());
+      switch (role)
+      {
+        case QMessageBox::RejectRole:
+          continue;
+
+        case QMessageBox::ActionRole:
+          break;
+
+        default:
+        case QMessageBox::YesRole:
+          target = m_OrganizerCore.downloadManager()->getDownloadFileName(file.fileName());
+          break;
+
+      }
+    }
+
+    //We should really show progress and add a cancel button for these in case
+    //the operation takes a long time.
+    if (action == Qt::MoveAction) {
+      if (MoveFileExW(file.absoluteFilePath().toStdWString().c_str(),
+                      target.toStdWString().c_str(),
+                      MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING) != 0) {
+        continue;
+      }
+    }
+    else {
+        if (CopyFileW(file.absoluteFilePath().toStdWString().c_str(),
+                      target.toStdWString().c_str(),
+                      FALSE) != 0) {
+          continue;
+        }
+    }
+    //Something has gone horribly wrong here
+    qDebug("error %d", GetLastError());
+    if (action == Qt::MoveAction) {
+      //Don't let the original source get deleted on a move
+      event->setDropAction(Qt::TargetMoveAction);
+    }
+  }
+  event->accept();
+}
-- 
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