plugins/projectmanagerview/proxyselectionmodel.cpp

   1 /* This file is part of KDevelop
   2     Copyright 2008 Andreas Pakulat <apaku@gmx.de>
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18 */
  19
  20 #include "proxyselectionmodel.h"
  21 #include <QAbstractProxyModel>
  22 #include <QAbstractItemView>
  23
  24 ProxySelectionModel::ProxySelectionModel( QAbstractItemView* itemview, QItemSelectionModel* sourceSelectionModel, QObject* parent )
  25     : QItemSelectionModel( itemview->model(), parent ), proxyModel(0), selectionModel( sourceSelectionModel ), view( itemview ), doingUpdate( false )
  26 {
  27     proxyModel = dynamic_cast<QAbstractProxyModel*>( view->model() );
  28     if( proxyModel )
  29     {
  30         connect( selectionModel, SIGNAL( currentChanged( const QModelIndex&, const QModelIndex& ) ),
  31                  this, SLOT(changeCurrent( const QModelIndex&, const QModelIndex& ) ) );
  32         connect( selectionModel, SIGNAL( currentColumnChanged( const QModelIndex&, const QModelIndex& ) ),
  33                  this, SLOT(changeCurrentColumn( const QModelIndex&, const QModelIndex& ) ) );
  34         connect( selectionModel, SIGNAL( currentRowChanged( const QModelIndex&, const QModelIndex& ) ),
  35                  this, SLOT(changeCurrentRow( const QModelIndex&, const QModelIndex& ) ) );
  36         connect( selectionModel, SIGNAL( selectionChanged( const QItemSelection&, const QItemSelection& ) ),
  37                  this, SLOT(changeSelection( const QItemSelection&, const QItemSelection& ) ) );
  38
  39         connect( this, SIGNAL( currentChanged( const QModelIndex&, const QModelIndex& ) ),
  40                  this, SLOT(forwardChangeCurrent( const QModelIndex&, const QModelIndex& ) ) );
  41         connect( this, SIGNAL( currentColumnChanged( const QModelIndex&, const QModelIndex& ) ),
  42                  this, SLOT(forwardChangeCurrentColumn( const QModelIndex&, const QModelIndex& ) ) );
  43         connect( this, SIGNAL( currentRowChanged( const QModelIndex&, const QModelIndex& ) ),
  44                  this, SLOT(forwardChangeCurrentRow( const QModelIndex&, const QModelIndex& ) ) );
  45         connect( this, SIGNAL( selectionChanged( const QItemSelection&, const QItemSelection& ) ),
  46                  this, SLOT(forwardChangeSelection( const QItemSelection&, const QItemSelection& ) ) );
  47     }
  48     view->setSelectionModel(this);
  49 }
  50
  51 void ProxySelectionModel::changeCurrent( const QModelIndex& current, const QModelIndex& previous )
  52 {
  53     if( doingUpdate )
  54         return;
  55     doingUpdate = true;
  56     emit currentChanged( proxyModel->mapFromSource( current ), proxyModel->mapFromSource( previous ) );
  57     doingUpdate = false;
  58 }
  59
  60 void ProxySelectionModel::changeCurrentColumn( const QModelIndex& current, const QModelIndex& previous )
  61 {
  62     if( doingUpdate )
  63         return;
  64     doingUpdate = true;
  65     emit currentColumnChanged( proxyModel->mapFromSource( current ), proxyModel->mapFromSource( previous ) );
  66     doingUpdate = false;
  67 }
  68
  69 void ProxySelectionModel::changeCurrentRow( const QModelIndex& current, const QModelIndex& previous )
  70 {
  71     if( doingUpdate )
  72         return;
  73     doingUpdate = true;
  74     emit currentRowChanged( proxyModel->mapFromSource( current ), proxyModel->mapFromSource( previous ) );
  75     doingUpdate = false;
  76 }
  77
  78 void ProxySelectionModel::changeSelection( const QItemSelection& selected, const QItemSelection& deselected )
  79 {
  80     if( doingUpdate )
  81         return;
  82     doingUpdate = true;
  83     emit selectionChanged( proxyModel->mapSelectionFromSource( selected ), proxyModel->mapSelectionFromSource( deselected ) );
  84     doingUpdate = false;
  85 }
  86
  87 QItemSelectionModel::SelectionFlags ProxySelectionModel::selectionFlags() const
  88 {
  89     QItemSelectionModel::SelectionFlags f;
  90     if( view->selectionMode() == QAbstractItemView::SingleSelection )
  91     {
  92       f = QItemSelectionModel::ClearAndSelect;
  93       if( view->selectionBehavior() == QAbstractItemView::SelectItems )
  94           f |= QItemSelectionModel::NoUpdate;
  95       if( view->selectionBehavior() == QAbstractItemView::SelectRows )
  96           f |= QItemSelectionModel::Rows;
  97       if( view->selectionBehavior() == QAbstractItemView::SelectColumns )
  98           f |= QItemSelectionModel::Columns;
  99     }
 100     else
 101           f = QItemSelectionModel::NoUpdate;
 102     return f;
 103 }
 104
 105 void ProxySelectionModel::forwardChangeCurrent( const QModelIndex& current, const QModelIndex& previous )
 106 {
 107     if( doingUpdate )
 108         return;
 109     doingUpdate = true;
 110     selectionModel->setCurrentIndex( proxyModel->mapToSource( current ), selectionFlags() );
 111     doingUpdate = false;
 112 }
 113
 114 void ProxySelectionModel::forwardChangeCurrentColumn( const QModelIndex& current, const QModelIndex& previous )
 115 {
 116     if( doingUpdate )
 117         return;
 118     doingUpdate = true;
 119     selectionModel->setCurrentIndex( proxyModel->mapToSource( current ), selectionFlags() );
 120     doingUpdate = false;
 121 }
 122
 123 void ProxySelectionModel::forwardChangeCurrentRow( const QModelIndex& current, const QModelIndex& previous )
 124 {
 125     if( doingUpdate )
 126         return;
 127     doingUpdate = true;
 128     selectionModel->setCurrentIndex( proxyModel->mapToSource( current ), selectionFlags() );
 129     doingUpdate = false;
 130 }
 131
 132 void ProxySelectionModel::forwardChangeSelection( const QItemSelection& selected, const QItemSelection& deselected )
 133 {
 134     if( doingUpdate )
 135         return;
 136     doingUpdate = true;
 137     selectionModel->select( proxyModel->mapSelectionToSource( selected ), QItemSelectionModel::Select );
 138     selectionModel->select( proxyModel->mapSelectionToSource( deselected ), QItemSelectionModel::Deselect );
 139     doingUpdate = false;
 140 }
 141
 142
 143 #include "proxyselectionmodel.moc"
 144