Basic classes and window layout

gridpreview.h

@@ -0,0 +1,23 @@
+#ifndef GRIDPREVIEW_H
+#define GRIDPREVIEW_H
+
+#include <QWidget>
+#include "line.h"
+
+class GridPreview : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit GridPreview(QWidget *parent = nullptr);
+    void setSize(int newWidth, int newHeight);
+    void addLine(Line &line);
+    void removeLine(int index);
+    QString toLuaTable();
+private:
+    int width = 5, height = 5;
+    QVector<Line> lines {};
+    const QString tableTemplate = "return {\n    width = %1,\n    height = %2,\n    lines = {\n%3\n    }\n}";
+signals:
+};
+
+#endif // GRIDPREVIEW_H