Provide the delete functionality to RepoModel

Extend RepoModel to support the delete entry functionality.

re #7031

Code/Mantid/MantidQt/API/inc/MantidQtAPI/RepoModel.h

@@ -11,6 +11,7 @@
 #include "MantidAPI/ScriptRepository.h"
 #include <QtConcurrentRun>
 #include <QFutureWatcher>
+#include <QMessageBox>
 
 class QLineEdit; 
 class QCheckBox; 
@@ -34,6 +35,9 @@ const QString BOTHUNCHANGED = "UPDATED";
 const QString BOTHCHANGED = "CHANGED"; 
 const QString UPLOADST = "UPLOADING";
 const QString DOWNLOADST = "DOWNLOADING";
+const QString PROTECTEDENTRY = "protected";
+const QString DELETABLEENTRY = "deletable"; 
+
 
   /** RepoModel : Wrapper for ScriptRepository to fit the Model View Qt Framework. 
       
@@ -122,7 +126,8 @@ const QString DOWNLOADST = "DOWNLOADING";
     /// access to the parent of this entry
     /// @return : this entry parent's
     RepoItem * parent() const{return parentItem;};
-
+    /// allow to remove a child, which allows erasing rows from the view.
+    bool removeChild(int row);
 private:
     /// track the list of children for this entry
     QList<RepoItem * >childItems;
@@ -156,6 +161,20 @@ const QString DOWNLOADST = "DOWNLOADING";
       QTextEdit * comment_te;
     };
 
+    /** Auxiliary Dialog to get the option from the user about removing the entries 
+     *  from the local folder or the central repository. When removing from central 
+     *  repository, it will allow also to provide the justification.
+     */
+    class DeleteQueryBox : public QMessageBox{
+    public: 
+      DeleteQueryBox(const QString & path, Mantid::API::SCRIPTSTATUS status, QWidget* parent = 0);
+      virtual ~DeleteQueryBox(); 
+      bool deleteCentral(); 
+      QString comment(); 
+    private: 
+      QTextEdit * comment_te; 
+      QCheckBox * delete_ck; 
+    };
 
 public:
     /// constructor
@@ -194,23 +213,28 @@ const QString DOWNLOADST = "DOWNLOADING";
     QString fileDescription(const QModelIndex & index); 
     QString filePath(const QModelIndex & index);
     QString author(const QModelIndex& index); 
-
+ protected:
+    /// Implements the  QAbstractItemModel::removeRows to allow deleting rows from the view.
+    bool removeRows ( int row, int count, const QModelIndex & parent = QModelIndex() );
 private:
     /// auxiliary method to populate the model
     void setupModelData(RepoItem *parent);
     /// auxiliary method to match the ScriptStatus to string
     const QString & fromStatus(Mantid::API::SCRIPTSTATUS status)const; 
-
+    /// pointer to the RepoItem root
     RepoItem *rootItem;
+    /// pointer to the ScriptRepository
     Mantid::API::ScriptRepository_sptr repo_ptr;
-    QString last_selected;
+    /// ScriptLocalRepository path, to be able to retrieve the absolute path
     QString repo_path;
     /// auxiliary method to help populating the model
     RepoItem * getParent(const QString & folder, QList<RepoItem*>&parents);
-private:
-    RepoModel( const RepoModel& );
-    const RepoModel& operator=( const RepoModel& );
+
+    Q_DISABLE_COPY(RepoModel);
+    /// logger
     static Mantid::Kernel::Logger & g_log;
+
+    /// auxiliary method to deal with exceptions
     void handleExceptions(const Mantid::API::ScriptRepoException & ex, 
                           const QString & title, 
                           bool showWarning=true)const;
@@ -223,20 +247,24 @@ const QString DOWNLOADST = "DOWNLOADING";
     bool isDownloading(const QModelIndex & index)const ; 
     private slots:
     void downloadFinished();
-
  private:
-    //handle upload in thread
+    //handle connection to the uploader server in thread
+    // this connection are used to upload or deleting files.
+
+    // QFuture variable, used to check if the thread is running, alive, etc... 
     QFuture<QString> upload_threads;
+    // The mechanism to have a call back function executed after finishing the thread
     QFutureWatcher<QString> upload_watcher;
-    QModelIndex upload_index;
+    // keep track of the file being used to the connection with uploader
     QString uploading_path;
+    QModelIndex delete_index;
+    // check if the file pointed by the index is inside a connection with uploader
     bool isUploading(const QModelIndex & index)const ; 
     private slots:
+    // call back method executed after finishing the thread
     void uploadFinished();
-
   };
 
-
 }; // namespace API
 };// namespace Mantid