Lots of foundational work for Amuse editor

Editor/Common.cpp

@@ -0,0 +1,38 @@
+#include "Common.hpp"
+#include <QMessageBox>
+#include <QObject>
+
+boo::SystemString QStringToSysString(const QString& str)
+{
+#ifdef _WIN32
+    return (wchar_t*)str.utf16();
+#else
+    return str.toUtf8().toStdString();
+#endif
+}
+
+QString SysStringToQString(const boo::SystemString& str)
+{
+#ifdef _WIN32
+    return QString::fromStdWString(str);
+#else
+    return QString::fromStdString(str);
+#endif
+}
+
+bool MkPath(const QString& path, QWidget* parent)
+{
+    QFileInfo fInfo(path);
+    return MkPath(fInfo.dir(), fInfo.fileName(), parent);
+}
+
+bool MkPath(const QDir& dir, const QString& file, QWidget* parent)
+{
+    if (!dir.mkpath(file))
+    {
+        QString msg = QString(parent->tr("A directory at '%1/%2' could not be created.")).arg(dir.path()).arg(file);
+        QMessageBox::critical(parent, parent->tr("Unable to create directory"), msg);
+        return false;
+    }
+    return true;
+}