unipresent/common/UpPresentationsModel.cpp

   1 /***************************************************************************
   2  *   This file is part of KWorship.                                        *
   3  *   Copyright 2008 James Hogan <james@albanarts.com>                      *
   4  *                                                                         *
   5  *   KWorship is free software: you can redistribute it and/or modify      *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation, either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   KWorship is distributed in the hope that it will be useful,           *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with KWorship.  If not, write to the Free Software Foundation,  *
  17  *   Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   *
  18  ***************************************************************************/
  19
  20 /**
  21  * @file UpPresentationsModel.cpp
  22  * @brief A Qt model for presentation items.
  23  * @author James Hogan <james@albanarts.com>
  24  */
  25
  26 #include "UpPresentationsModel.h"
  27 #include "UpPresentation.h"
  28 #include "UpManagerNode.h"
  29 #include "UpBackendNode.h"
  30 #include "UpPresentationNode.h"
  31
  32 /*
  33  * Constructors + destructor
  34  */
  35
  36 /// Default constructor.
  37 UpPresentationsModel::UpPresentationsModel(QObject* parent)
  38 : NodeBasedModel<>(parent)
  39 {
  40 }
  41
  42 /// Destructor.
  43 UpPresentationsModel::~UpPresentationsModel()
  44 {
  45 }
  46
  47 /*
  48  * Public slots
  49  */
  50
  51 void UpPresentationsModel::loadedPresentation(UpPresentation* presentation)
  52 {
  53   // First find the backend
  54   UpManagerNode* root = dynamic_cast<UpManagerNode*>(getRootNode());
  55   Q_ASSERT(0 != root);
  56   UpBackendNode* backendNode = root->getBackendNode(presentation->backend());
  57   if (0 != backendNode)
  58   {
  59     int backendRow = root->getChildIndex(backendNode);
  60     Q_ASSERT(-1 != backendRow);
  61     QModelIndex backendIndex = index(backendRow, 0, QModelIndex());
  62     int row = backendNode->getChildCount() - 1;
  63     beginInsertRows(backendIndex, row, row);
  64     backendNode->childrenAdded(row, row);
  65     endInsertRows();
  66   }
  67 }
  68
  69 void UpPresentationsModel::unloadedPresentation(UpPresentation* presentation)
  70 {
  71   // First find the backend
  72   UpManagerNode* root = dynamic_cast<UpManagerNode*>(getRootNode());
  73   Q_ASSERT(0 != root);
  74   UpBackendNode* backendNode = root->getBackendNode(presentation->backend());
  75   if (0 != backendNode)
  76   {
  77     // Now find the presentation node
  78     UpPresentationNode* presentationNode = backendNode->getPresentationNode(presentation);
  79     if (0 != presentationNode)
  80     {
  81       int row = backendNode->getChildIndex(presentationNode);
  82       if (row != -1)
  83       {
  84         int backendRow = root->getChildIndex(backendNode);
  85         Q_ASSERT(-1 != backendRow);
  86         QModelIndex backendIndex = index(backendRow, 0, QModelIndex());
  87         beginRemoveRows(backendIndex, row, row);
  88         backendNode->childrenRemoved(row, row);
  89         endRemoveRows();
  90       }
  91     }
  92   }
  93 }
  94