wrote viewmodel model for project browsing

app/project/projectviewmodel.h

@@ -0,0 +1,65 @@
+#ifndef VIEWMODEL_H
+#define VIEWMODEL_H
+
+#include <QAbstractItemModel>
+
+#include "project.h"
+
+/**
+ * @brief The ProjectViewModel class
+ *
+ * An adapter that interprets the data in a Project into a Qt item model for usage in ViewModel Views.
+ */
+class ProjectViewModel : public QAbstractItemModel
+{
+public:
+  enum ColumnType {
+    /// Media name
+    kName,
+
+    /// Media duration
+    kDuration,
+
+    /// Media rate (frame rate for video, sample rate for audio)
+    kRate
+  };
+
+  ProjectViewModel(QObject* parent);
+
+  /**
+   * @brief Get currently active project
+   *
+   * @return
+   *
+   * Currently active project or nullptr if there is none
+   */
+  Project* project();
+
+  /**
+   * @brief Set the project to adapt
+   *
+   * Any views attached to this model will get updated by this function.
+   *
+   * @param p
+   *
+   * Project to adapt, can be set to nullptr to "close" the project (will show an empty model that cannot be modified)
+   */
+  void set_project(Project* p);
+
+  /** Compulsory Qt QAbstractItemModel overrides */
+  virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+  virtual QModelIndex parent(const QModelIndex &child) const override;
+  virtual int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+  virtual int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+  virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+
+  /** Optional Qt QAbstractItemModel overrides */
+  virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
+
+private:
+  Project* project_;
+
+  QVector<ColumnType> columns_;
+};
+
+#endif // VIEWMODEL_H