add different tabs for map list views

include/ui/maplistmodels.h

@@ -0,0 +1,58 @@
+#pragma once
+#ifndef MAPLISTMODELS_H
+#define MAPLISTMODELS_H
+
+#include <QStandardItemModel>
+#include <QMap>
+
+
+
+class Project;
+
+enum MapListRoles {
+    GroupRole = Qt::UserRole + 1, // Used to hold the map group number.
+    TypeRole,  // Used to differentiate between the different layers of the map list tree view.
+    TypeRole2, // Used for various extra data needed.
+};
+
+// or QStandardItemModel??
+class MapGroupModel : public QStandardItemModel {
+    Q_OBJECT
+
+public:
+    MapGroupModel(Project *project, QObject *parent = nullptr);
+    ~MapGroupModel() {}
+
+    QVariant data(const QModelIndex &index, int role) const override;
+
+public:
+    void setMap(QString mapName) { this->openMap = mapName; }
+
+    QStandardItem *createGroupItem(QString groupName, int groupIndex);
+    QStandardItem *createMapItem(QString mapName, int groupIndex, int mapIndex);
+
+    QStandardItem *getItem(const QModelIndex &index) const;
+    QModelIndex indexOfMap(QString mapName);
+
+    void initialize();
+
+private:
+    Project *project;
+    QStandardItem *root = nullptr;
+
+    QMap<QString, QStandardItem *> groupItems;
+    QMap<QString, QStandardItem *> mapItems;
+    // TODO: if reordering, will the item be the same?
+
+    QString openMap;
+
+    // QIcon *mapIcon = nullptr;
+    // QIcon *mapEditedIcon = nullptr;
+    // QIcon *mapOpenedIcon = nullptr;
+    // QIcon *mapFolderIcon = nullptr;
+
+signals:
+    void edited();
+};
+
+#endif // MAPLISTMODELS_H