add newItem function to interface with QML

In order to make sure QML can properly interact with Rust I'll use a
function in the proxy model to interact with the actual model
underneath in Rust.

src/cpp/imagesqlmodel.cpp

@@ -226,6 +226,11 @@ QModelIndex ImageProxyModel::idx(int row) {
   return idx;
 }
 
+void ImageProxyModel::newItem(const QUrl &url) {
+  auto model = qobject_cast<ImageModel *>(sourceModel());
+  model->newItem(url);
+}
+
 QVariantMap ImageProxyModel::getImage(const int &row) {
   auto model = qobject_cast<ImageModel *>(sourceModel());
   QVariantMap image = model->getItem(mapToSource(index(row, 0)).row());

src/cpp/imagesqlmodel.h

@@ -62,6 +62,7 @@ public:
   
 public slots:
   Q_INVOKABLE QVariantMap getImage(const int &row);
+  Q_INVOKABLE void newItem(const QUrl &url);
   Q_INVOKABLE void deleteImage(const int &row);
   Q_INVOKABLE void deleteImages(const QVector<int> &rows);
 

src/qml/presenter/Library.qml

@@ -299,7 +299,7 @@ Item {
             }
 
             function addImg(url) {
-                imageProxyModel.imageModel.newItem(url);
+                imageProxyModel.newItem(url);
                 selectedLibrary = "image";
                 imageLibrary.libraryList.currentIndex = imageProxyModel.imageModel.count();
                 console.log(imageProxyModel.getImage(imageLibrary.libraryList.currentIndex));