src/client/modelpropertymapper.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-07 by The Quassel Team                             *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program 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  *   This program 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  *                                                                         *
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  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "modelpropertymapper.h"
  22
  23 #include <QItemSelectionModel>
  24 #include <QDebug>
  25
  26 ModelPropertyMapper::ModelPropertyMapper(QObject *parent)
  27   : QObject(parent),
  28     _model(0),
  29     _selectionModel(0)
  30 {
  31 }
  32
  33 ModelPropertyMapper::~ModelPropertyMapper() {
  34 }
  35
  36 void ModelPropertyMapper::setModel(QAbstractItemModel *model) {
  37   if(_model)
  38     setSelectionModel(new QItemSelectionModel(model));
  39   _model = model;
  40 }
  41
  42 QAbstractItemModel *ModelPropertyMapper::model() const {
  43   return _model;
  44 }
  45
  46 void ModelPropertyMapper::setSelectionModel(QItemSelectionModel *selectionModel) {
  47   if(selectionModel->model() != model()) {
  48     qWarning() << "cannot set itemSelectionModel" << selectionModel << "which uses different basemodel than" << model();
  49     return;
  50   }
  51   if(_selectionModel)
  52     disconnect(_selectionModel, 0, this, 0);
  53   _selectionModel = selectionModel;
  54   connect(_selectionModel, SIGNAL(currentRowChanged(QModelIndex, QModelIndex)),
  55           this, SLOT(setCurrentRow(QModelIndex, QModelIndex)));
  56   connect(_selectionModel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
  57           this, SLOT(setCurrentIndex(QModelIndex, QModelIndex)));
  58
  59   setCurrentRow(selectionModel->currentIndex(), QModelIndex());
  60 }
  61
  62 QItemSelectionModel *ModelPropertyMapper::selectionModel() const {
  63   return _selectionModel;
  64 }
  65
  66 void ModelPropertyMapper::addMapping(int column, int role, QObject *target, const QByteArray &property) {
  67   Mapping mapping(column, role, target, property);
  68   if(!_mappings.contains(mapping))
  69     _mappings.append(mapping);
  70 }
  71
  72 void ModelPropertyMapper::removeMapping(int column, int role, QObject *target, const QByteArray &property) {
  73   if(column == 0 && role == 0 && target == 0 && !property.isNull()) {
  74     _mappings.clear();
  75     return;
  76   }
  77
  78   if(column == 0 && role == 0 && !property.isNull()) {
  79     QList<Mapping>::iterator iter;
  80     for(iter = _mappings.begin(); iter != _mappings.end(); iter++) {
  81       if((*iter).target == target)
  82         _mappings.erase(iter);
  83     }
  84     return;
  85   }
  86   _mappings.removeAll(Mapping(column, role, target, property));
  87 }
  88
  89 void ModelPropertyMapper::setCurrentIndex(const QModelIndex &current, const QModelIndex &previous) {
  90   if(current.row() == previous.row() && current.parent() != previous.parent())
  91     setCurrentRow(current, previous);
  92 }
  93
  94 void ModelPropertyMapper::setCurrentRow(const QModelIndex &current, const QModelIndex &previous) {
  95   Q_UNUSED(previous)
  96   foreach(Mapping mapping, _mappings) {
  97     QModelIndex index = current.sibling(current.row(), mapping.column);
  98     // qDebug() << mapping.target << mapping.property << index.data(mapping.role);
  99     mapping.target->setProperty(mapping.property, index.data(mapping.role));
 100   }
 101 }
 102
 103
 104 void ModelPropertyMapper::targetDestroyed() {
 105   QObject *obj = static_cast<QObject *>(sender());
 106   removeMapping(0, 0, obj, QByteArray());
 107 }