5 files changed, 27 insertions, 10 deletions
diff --git a/src/shared/qrceditor/qrceditor.cpp b/src/shared/qrceditor/qrceditor.cpp
index 8ac36dc299c..82751b81583 100644
--- a/src/shared/qrceditor/qrceditor.cpp
+++ b/src/shared/qrceditor/qrceditor.cpp
@@ -417,6 +417,7 @@ void QrcEditor::onAddFiles()
             : m_treeview->model()->parent(current).row();
     int const cursorFileArrayIndex = currentIsPrefixNode ? 0 : current.row();
     QStringList fileNames = m_treeview->fileNamesToAdd();
+    fileNames = m_treeview->existingFilesSubtracted(prefixArrayIndex, fileNames);
     resolveLocationIssues(fileNames);
     if (fileNames.isEmpty())
         return;
diff --git a/src/shared/qrceditor/resourcefile.cpp b/src/shared/qrceditor/resourcefile.cpp
index 9b2466c8b96..9699632b462 100644
--- a/src/shared/qrceditor/resourcefile.cpp
+++ b/src/shared/qrceditor/resourcefile.cpp
@@ -793,36 +793,45 @@ QModelIndex ResourceModel::addFiles(const QModelIndex &model_idx, const QStringL
     return index(lastFileArrayIndex, 0, prefixModelIndex);
 }
 
+QStringList ResourceModel::existingFilesSubtracted(int prefixIndex, const QStringList &fileNames) const
+{
+    const QModelIndex prefixModelIdx = index(prefixIndex, 0, QModelIndex());
+    QStringList uniqueList;
+
+    if (prefixModelIdx.isValid()) {
+        foreach (const QString &file, fileNames) {
+            if (!m_resource_file.contains(prefixIndex, file) && !uniqueList.contains(file))
+                uniqueList.append(file);
+        }
+    }
+    return uniqueList;
+}
+
 void ResourceModel::addFiles(int prefixIndex, const QStringList &fileNames, int cursorFile,
         int &firstFile, int &lastFile)
 {
     Q_UNUSED(cursorFile)
     const QModelIndex prefix_model_idx = index(prefixIndex, 0, QModelIndex());
-    const QStringList &file_list = fileNames;
     firstFile = -1;
     lastFile = -1;
 
     if (!prefix_model_idx.isValid()) {
         return;
     }
-    const int prefix_idx = prefixIndex;
 
-    QStringList unique_list;
-    foreach (const QString &file, file_list) {
-        if (!m_resource_file.contains(prefix_idx, file) && !unique_list.contains(file))
-            unique_list.append(file);
-    }
+    QStringList unique_list = existingFilesSubtracted(prefixIndex, fileNames);
 
     if (unique_list.isEmpty()) {
         return;
     }
-    const int cnt = m_resource_file.fileCount(prefix_idx);
+
+    const int cnt = m_resource_file.fileCount(prefixIndex);
     beginInsertRows(prefix_model_idx, cnt, cnt + unique_list.count() - 1); // ### FIXME
 
     foreach (const QString &file, unique_list)
-        m_resource_file.addFile(prefix_idx, file);
+        m_resource_file.addFile(prefixIndex, file);
 
-    const QFileInfo fi(file_list.last());
+    const QFileInfo fi(unique_list.last());
     m_lastResourceDir = fi.absolutePath();
 
     endInsertRows();
diff --git a/src/shared/qrceditor/resourcefile_p.h b/src/shared/qrceditor/resourcefile_p.h
index 4ae20763090..ebcde729d8d 100644
--- a/src/shared/qrceditor/resourcefile_p.h
+++ b/src/shared/qrceditor/resourcefile_p.h
@@ -216,6 +216,7 @@ public:
 
     virtual QModelIndex addNewPrefix();
     virtual QModelIndex addFiles(const QModelIndex &idx, const QStringList &file_list);
+    QStringList existingFilesSubtracted(int prefixIndex, const QStringList &fileNames) const;
     void addFiles(int prefixIndex, const QStringList &fileNames, int cursorFile, int &firstFile, int &lastFile);
     void insertPrefix(int prefixIndex, const QString &prefix, const QString &lang);
     void insertFile(int prefixIndex, int fileIndex, const QString &fileName, const QString &alias);
diff --git a/src/shared/qrceditor/resourceview.cpp b/src/shared/qrceditor/resourceview.cpp
index 07fd1f36b38..4437a7fad5e 100644
--- a/src/shared/qrceditor/resourceview.cpp
+++ b/src/shared/qrceditor/resourceview.cpp
@@ -305,6 +305,11 @@ EntryBackup * ResourceView::removeEntry(const QModelIndex &index)
     return m_qrcModel->removeEntry(index);
 }
 
+QStringList ResourceView::existingFilesSubtracted(int prefixIndex, const QStringList &fileNames) const
+{
+    return m_qrcModel->existingFilesSubtracted(prefixIndex, fileNames);
+}
+
 void ResourceView::addFiles(int prefixIndex, const QStringList &fileNames, int cursorFile,
         int &firstFile, int &lastFile)
 {
diff --git a/src/shared/qrceditor/resourceview.h b/src/shared/qrceditor/resourceview.h
index a00afd95a47..5b8a458fa9b 100644
--- a/src/shared/qrceditor/resourceview.h
+++ b/src/shared/qrceditor/resourceview.h
@@ -117,6 +117,7 @@ public:
 
     void findSamePlacePostDeletionModelIndex(int &row, QModelIndex &parent) const;
     EntryBackup *removeEntry(const QModelIndex &index);
+    QStringList existingFilesSubtracted(int prefixIndex, const QStringList &fileNames) const;
     void addFiles(int prefixIndex, const QStringList &fileNames, int cursorFile,
                   int &firstFile, int &lastFile);
     void removeFiles(int prefixIndex, int firstFileIndex, int lastFileIndex);