Add simple filter option

databaseview.h

@@ -6,6 +6,8 @@
 #include <QSqlQueryModel>
 #include <QTableView>
 #include <QListWidget>
+#include <QComboBox>
+#include <QLineEdit>
 #include "database.h"
 
 class SelectColumnsDialog : public QDialog
@@ -18,12 +20,29 @@ public:
     QStringList selectedColumns();
 };
 
+class FITSFileModel : public QSqlQueryModel
+{
+    Q_OBJECT
+    QStringList m_columns;
+    QString m_sort;
+    QString m_having;
+public:
+    FITSFileModel(QObject *parent = nullptr);
+    void sort(int column, Qt::SortOrder order);
+    void setColumns(const QStringList &columns);
+    void setFilter(const QString &key, const QString &value);
+protected:
+    void prepareQuery();
+};
+
 class DataBaseView : public QWidget
 {
     Q_OBJECT
     Database *m_database;
     QTableView *m_tableView;
-    QSqlQueryModel *m_model;
+    FITSFileModel *m_model;
+    QComboBox *m_filterKeyword;
+    QLineEdit *m_search;
 public:
     explicit DataBaseView(Database *database, QWidget *parent = nullptr);
     ~DataBaseView();
@@ -31,8 +50,7 @@ public slots:
     void selectColumns();
     void loadDatabase();
     void itemActivated(const QModelIndex &index);
-protected:
-    void prepareQuery(const QStringList &columns);
+    void applyFilter();
 signals:
     void loadFile(QString file);
 };