add launcher

source/launcher/include/MandatoryLineEdit.h

@@ -0,0 +1,30 @@
+#ifndef MANDATORY_LINEEDIT_H
+#define MANDATORY_LINEEDIT_H
+
+#include "Common.h"
+
+#include <QLineEdit>
+#include <QString>
+
+class QPaintEvent;
+class QWidget;
+
+constexpr char MANDATORY_AND_EMPTY[] = "mandatory_and_empty";
+
+class MandatoryLineEdit: public QLineEdit
+{
+	Q_OBJECT
+
+public:
+	explicit MandatoryLineEdit(QWidget* parent = nullptr);
+
+	void paintEvent(QPaintEvent* event) override;
+
+	static bool FindEmpty(QObject* p);
+
+protected slots:
+
+	void changed(const QString& text);
+};
+
+#endif // MANDATORY_LINEEDIT_H