We finally got a nice solution to synchronize multiple views or whatevers[tm] even...

[quassel.git] / src / client / mappedselectionmodel.cpp

diff --git a/src/client/mappedselectionmodel.cpp b/src/client/mappedselectionmodel.cpp
new file mode 100644 (file)
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--- /dev/null
+++ b/src/client/mappedselectionmodel.cpp
@@ -0,0 +1,129 @@
+/***************************************************************************
+ *   Copyright (C) 2005-07 by The Quassel Team                             *
+ *   devel@quassel-irc.org                                                 *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#include "mappedselectionmodel.h"
+
+#include <QItemSelectionModel>
+#include <QAbstractItemModel>
+#include <QAbstractProxyModel>
+#include <QDebug>
+
+MappedSelectionModel::MappedSelectionModel(QAbstractItemModel *model)
+  : QItemSelectionModel(model)
+{
+  _isProxyModel = (bool)proxyModel();
+  connect(this, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
+         this, SLOT(_currentChanged(QModelIndex, QModelIndex)));
+  connect(this, SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
+         this, SLOT(_selectionChanged(QItemSelection, QItemSelection)));
+}
+
+MappedSelectionModel::~MappedSelectionModel() {
+}
+
+const QAbstractItemModel *MappedSelectionModel::baseModel() const {
+  if(isProxyModel())
+    return proxyModel()->sourceModel();
+  else
+    return model();
+}
+
+const QAbstractProxyModel *MappedSelectionModel::proxyModel() const {
+  return qobject_cast<const QAbstractProxyModel *>(model());
+}
+
+QModelIndex MappedSelectionModel::mapFromSource(const QModelIndex &sourceIndex) {
+  if(isProxyModel())
+    return proxyModel()->mapFromSource(sourceIndex);
+  else
+    return sourceIndex;
+}
+
+QItemSelection MappedSelectionModel::mapFromSource(const QItemSelection &sourceSelection) {
+  if(isProxyModel()) {
+    QItemSelection mappedSelection;
+    foreach(QItemSelectionRange range, sourceSelection) {
+      QModelIndex topleft = mapFromSource(range.topLeft());
+      QModelIndex bottomright = mapFromSource(range.bottomRight());
+      if(topleft.isValid() && bottomright.isValid())
+       mappedSelection << QItemSelectionRange(topleft, bottomright);
+      else 
+       Q_ASSERT(!topleft.isValid() && !bottomright.isValid());
+    }
+    return mappedSelection;
+  } else {
+    return sourceSelection;
+  }
+}
+                                   
+QModelIndex MappedSelectionModel::mapToSource(const QModelIndex &proxyIndex) {
+  if(isProxyModel())
+    return proxyModel()->mapToSource(proxyIndex);
+  else
+    return proxyIndex;
+}
+
+QItemSelection MappedSelectionModel::mapToSource(const QItemSelection &proxySelection) {
+  if(isProxyModel()) {
+    QItemSelection mappedSelection;
+    foreach(QItemSelectionRange range, proxySelection) {
+      mappedSelection << QItemSelectionRange(mapToSource(range.topLeft()), mapToSource(range.bottomRight()));
+    }
+    return mappedSelection;
+  } else {
+    return proxySelection;
+  }
+}
+                                                                       
+void MappedSelectionModel::mappedSelect(const QModelIndex &index, QItemSelectionModel::SelectionFlags command) {
+  QModelIndex mappedIndex = mapFromSource(index);
+  if(!isSelected(mappedIndex))
+    select(mappedIndex, command);
+}
+
+void MappedSelectionModel::mappedSelect(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command) {
+  QItemSelection mappedSelection = mapFromSource(selection);
+  if(mappedSelection != QItemSelectionModel::selection())
+    select(mappedSelection, command);  
+}
+
+void MappedSelectionModel::mappedSetCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlags command) {
+  QModelIndex mappedIndex = mapFromSource(index);
+  if(mappedIndex == currentIndex())
+    return;
+
+  if(mappedIndex.isValid())
+    setCurrentIndex(mappedIndex, command);
+  else if(hasSelection())
+    setCurrentIndex(currentIndex(), QItemSelectionModel::Clear);
+}
+
+
+void MappedSelectionModel::_currentChanged(const QModelIndex &current, const QModelIndex &previous) {
+  Q_UNUSED(previous)
+  emit mappedCurrentChanged(mapToSource(current));
+}
+
+void MappedSelectionModel::_selectionChanged(const QItemSelection &selected, const QItemSelection &deselected) {
+  Q_UNUSED(selected)
+  Q_UNUSED(deselected)
+  emit mappedSelectionChanged(mapToSource(QItemSelectionModel::selection()));
+}
+