Core: Add convenience class ModuleIO to open files

src/Gui/ModuleIO.cpp

@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+/***************************************************************************
+ *   Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of FreeCAD.                                         *
+ *                                                                         *
+ *   FreeCAD is free software: you can redistribute it and/or modify it    *
+ *   under the terms of the GNU Lesser General Public License as           *
+ *   published by the Free Software Foundation, either version 2.1 of the  *
+ *   License, or (at your option) any later version.                       *
+ *                                                                         *
+ *   FreeCAD is distributed in the hope that it will be useful, but        *
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
+ *   Lesser General Public License for more details.                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with FreeCAD. If not, see                               *
+ *   <https://www.gnu.org/licenses/>.                                      *
+ *                                                                         *
+ **************************************************************************/
+
+#include "PreCompiled.h"
+#ifndef _PreComp_
+#include <QFileInfo>
+#include <QMessageBox>
+#endif
+
+
+#include "ModuleIO.h"
+#include "Application.h"
+#include "FileDialog.h"
+#include "MainWindow.h"
+
+
+using namespace Gui;
+
+/* TRANSLATOR Gui::ModuleIO */
+
+bool ModuleIO::verifyFile(const QString& filename)
+{
+    QFileInfo fi(filename);
+    if (!fi.exists() || !fi.isFile()) {
+        QMessageBox::critical(Gui::getMainWindow(),
+                              tr("File not found"),
+                              tr("The file '%1' cannot be opened.").arg(filename));
+        return false;
+    }
+
+    return true;
+}
+
+void ModuleIO::openFile(const QString& filename)
+{
+    // invokes appendFile()
+    Gui::SelectModule::Dict dict = Gui::SelectModule::importHandler(filename);
+    for (Gui::SelectModule::Dict::iterator it = dict.begin(); it != dict.end(); ++it) {
+        Gui::Application::Instance->open(it.key().toUtf8(), it.value().toLatin1());
+        break;
+    }
+}
+
+void ModuleIO::verifyAndOpenFile(const QString& filename)
+{
+    if (verifyFile(filename)) {
+        openFile(filename);
+    }
+}
+
+void ModuleIO::importFiles(const QStringList& filenames, const char* document)
+{
+    SelectModule::Dict dict = SelectModule::importHandler(filenames);
+    // load the files with the associated modules
+    for (SelectModule::Dict::iterator it = dict.begin(); it != dict.end(); ++it) {
+        // if the passed document name doesn't exist the module should create it, if needed
+        Application::Instance->importFrom(it.key().toUtf8(), document, it.value().toLatin1());
+    }
+}