first minimal stab at LAMMPS GUI

tools/lammps-gui/lammpsgui.h

@@ -0,0 +1,43 @@
+#ifndef LAMMPSGUI_H
+#define LAMMPSGUI_H
+
+#include <QMainWindow>
+#include <QFont>
+#include <QString>
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class LammpsGui; }
+QT_END_NAMESPACE
+
+class LammpsGui : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    LammpsGui(QWidget *parent = nullptr);
+    ~LammpsGui();
+
+private slots:
+    void new_document();
+    void open();
+    void save();
+    void save_as();
+    void quit();
+    void copy();
+    void cut();
+    void paste();
+    void undo();
+    void redo();
+    void clear();
+    void run_buffer();
+    void run_line();
+    void about();
+
+private:
+    Ui::LammpsGui *ui;
+    QString current_file;
+    QFont text_font;
+    int current_line;
+    void *lammps_handle;
+};
+#endif // LAMMPSGUI_H