File indexing completed on 2024-04-21 03:56:13

 /*
     SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.net>
     SPDX-FileContributor: Stephen Kelly <stephen@kdab.com>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "breadcrumbnavigationwidget.h"
 
 #include "dynamictreemodel.h"
 #include "dynamictreewidget.h"
 
 #include <QHBoxLayout>
 #include <QListView>
 #include <QSplitter>
 #include <QTreeView>
 
 #include "kbreadcrumbselectionmodel.h"
 #include "kselectionproxymodel.h"
 
 #define SON(object) object->setObjectName(QStringLiteral(#object))
 
 CurrentItemLabel::CurrentItemLabel(QAbstractItemModel *model, QWidget *parent, Qt::WindowFlags f)
     : QLabel(parent, f)
     , m_model(model)
 {
     connect(model, SIGNAL(dataChanged(QModelIndex, QModelIndex)), SLOT(dataChanged(QModelIndex, QModelIndex)));
     connect(model, SIGNAL(rowsInserted(QModelIndex, int, int)), SLOT(rowsInserted(QModelIndex, int, int)));
     connect(model, SIGNAL(rowsRemoved(QModelIndex, int, int)), SLOT(rowsRemoved(QModelIndex, int, int)));
     connect(model, SIGNAL(modelReset()), SLOT(modelReset()));
 
     if (!m_model->hasChildren()) {
         setText(QStringLiteral("No selection"));
     }
 }
 
 void CurrentItemLabel::dataChanged(const QModelIndex &, const QModelIndex &)
 {
     setText(m_model->index(0, 0).data().toString());
 }
 
 void CurrentItemLabel::rowsInserted(const QModelIndex &, int, int)
 {
     setText(m_model->index(0, 0).data().toString());
 }
 
 void CurrentItemLabel::rowsRemoved(const QModelIndex &, int, int)
 {
     if (!m_model->hasChildren()) {
         setText(QStringLiteral("No selection"));
         return;
     }
     setText(m_model->index(0, 0).data().toString());
 }
 
 void CurrentItemLabel::modelReset()
 {
     if (!m_model->hasChildren()) {
         setText(QStringLiteral("No selection"));
     }
     setText(m_model->index(0, 0).data().toString());
 }
 
 KBreadcrumbNavigationProxyModel::KBreadcrumbNavigationProxyModel(QItemSelectionModel *selectionModel, QObject *parent)
     : KSelectionProxyModel(selectionModel, parent)
 {
 }
 
 QVariant KBreadcrumbNavigationProxyModel::data(const QModelIndex &index, int role) const
 {
     if (rowCount() > 2 && index.row() == 0 && role == Qt::DisplayRole) {
         QModelIndex sourceIndex = mapToSource(index);
         QStringList dataList;
         while (sourceIndex.isValid()) {
             dataList.prepend(sourceIndex.data().toString());
             sourceIndex = sourceIndex.parent();
         }
         return dataList.join(QLatin1String(" > "));
     }
     return KSelectionProxyModel::data(index, role);
 }
 
 void KBreadcrumbNavigationProxyModel::setShowHiddenAscendantData(bool showHiddenAscendantData)
 {
     m_showHiddenAscendantData = showHiddenAscendantData;
 }
 
 bool KBreadcrumbNavigationProxyModel::showHiddenAscendantData() const
 {
     return m_showHiddenAscendantData;
 }
 
 KNavigatingProxyModel::KNavigatingProxyModel(QItemSelectionModel *selectionModel, QObject *parent)
     : KSelectionProxyModel(selectionModel, parent)
     , m_selectionModel(selectionModel)
 {
 }
 
 void KNavigatingProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
 {
     connect(m_selectionModel, SIGNAL(selectionChanged(QItemSelection, QItemSelection)), SLOT(navigationSelectionChanged(QItemSelection, QItemSelection)));
 
     KSelectionProxyModel::setSourceModel(sourceModel);
     updateNavigation();
 }
 
 void KNavigatingProxyModel::navigationSelectionChanged(const QItemSelection &, const QItemSelection &)
 {
     updateNavigation();
 }
 
 void KNavigatingProxyModel::updateNavigation()
 {
     if (!sourceModel()) {
         return;
     }
 
     if (m_selectionModel->selection().isEmpty()) {
         setFilterBehavior(KSelectionProxyModel::ExactSelection);
         QModelIndex top = sourceModel()->index(0, 0);
         QModelIndex bottom = sourceModel()->index(sourceModel()->rowCount() - 1, 0);
 
         disconnect(m_selectionModel,
                    SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
                    this,
                    SLOT(navigationSelectionChanged(QItemSelection, QItemSelection)));
         m_selectionModel->select(QItemSelection(top, bottom), QItemSelectionModel::Select);
         connect(m_selectionModel, SIGNAL(selectionChanged(QItemSelection, QItemSelection)), SLOT(navigationSelectionChanged(QItemSelection, QItemSelection)));
     } else if (filterBehavior() != KSelectionProxyModel::ChildrenOfExactSelection) {
         setFilterBehavior(KSelectionProxyModel::ChildrenOfExactSelection);
     }
 }
 
 void KNavigatingProxyModel::modelReset()
 {
     updateNavigation();
 }
 
 QVariant KNavigatingProxyModel::data(const QModelIndex &index, int role) const
 {
     if (role == Qt::DisplayRole && sourceModel()->hasChildren(mapToSource(index))) {
         return QString("+ " + KSelectionProxyModel::data(index, role).toString());
     }
     return KSelectionProxyModel::data(index, role);
 }
 
 KForwardingItemSelectionModel::KForwardingItemSelectionModel(QAbstractItemModel *model, QItemSelectionModel *selectionModel, QObject *parent)
     : QItemSelectionModel(model, parent)
     , m_selectionModel(selectionModel)
     , m_direction(Forward)
 {
     Q_ASSERT(model == selectionModel->model());
     connect(selectionModel, SIGNAL(selectionChanged(QItemSelection, QItemSelection)), SLOT(navigationSelectionChanged(QItemSelection, QItemSelection)));
 }
 
 KForwardingItemSelectionModel::KForwardingItemSelectionModel(QAbstractItemModel *model,
                                                              QItemSelectionModel *selectionModel,
                                                              Direction direction,
                                                              QObject *parent)
     : QItemSelectionModel(model, parent)
     , m_selectionModel(selectionModel)
     , m_direction(direction)
 {
     Q_ASSERT(model == selectionModel->model());
     if (m_direction == Forward) {
         connect(selectionModel, SIGNAL(selectionChanged(QItemSelection, QItemSelection)), SLOT(navigationSelectionChanged(QItemSelection, QItemSelection)));
     }
 }
 
 void KForwardingItemSelectionModel::select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command)
 {
     if (m_direction == Reverse) {
         m_selectionModel->select(index, command);
     } else {
         QItemSelectionModel::select(index, command);
     }
 }
 
 void KForwardingItemSelectionModel::select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command)
 {
     if (m_direction == Reverse) {
         m_selectionModel->select(selection, command);
     } else {
         QItemSelectionModel::select(selection, command);
     }
 }
 
 void KForwardingItemSelectionModel::navigationSelectionChanged(const QItemSelection &selected, const QItemSelection &)
 {
     select(selected, ClearAndSelect);
 }
 
 BreadcrumbNavigationWidget::BreadcrumbNavigationWidget(QWidget *parent, Qt::WindowFlags f)
     : QWidget(parent, f)
 {
     DynamicTreeModel *rootModel = new DynamicTreeModel(this);
     QSplitter *splitter = new QSplitter(this);
     QHBoxLayout *layout = new QHBoxLayout(this);
     layout->addWidget(splitter);
 
     DynamicTreeWidget *dynamicTree = new DynamicTreeWidget(rootModel, splitter);
     dynamicTree->treeView()->setSelectionMode(QAbstractItemView::SingleSelection);
     dynamicTree->setInitialTree(
         QLatin1String("- 1"
                       "- - 2"
                       "- - 2"
                       "- - - 3"
                       "- - - - 4"
                       "- - - - - 5"
                       "- - 2"
                       "- 6"
                       "- 6"
                       "- 6"
                       "- - 7"
                       "- - - 8"
                       "- - - 8"
                       "- - - - 9"
                       "- - - - - 10"
                       "- - - 8"
                       "- - - 8"
                       "- - 8"
                       "- 16"
                       "- - 17"
                       "- - - 18"
                       "- - - - 19"
                       "- - - - - 20"));
 
     QList<QItemSelectionModel *> selectionModelList;
 
     QSplitter *vSplitter = new QSplitter(Qt::Vertical, splitter);
 
     QItemSelectionModel *rootSelectionModel = new QItemSelectionModel(rootModel, this);
     SON(rootSelectionModel);
 
     dynamicTree->treeView()->setSelectionModel(rootSelectionModel);
 
     KBreadcrumbSelectionModel *breadcrumbOnlyProxySelector2 =
         new KBreadcrumbSelectionModel(rootSelectionModel, KBreadcrumbSelectionModel::MakeBreadcrumbSelectionInOther, this);
     SON(breadcrumbOnlyProxySelector2);
     breadcrumbOnlyProxySelector2->setActualSelectionIncluded(false);
 
     KBreadcrumbNavigationProxyModel *breadcrumbNavigationModel = new KBreadcrumbNavigationProxyModel(breadcrumbOnlyProxySelector2, this);
     SON(breadcrumbNavigationModel);
     breadcrumbNavigationModel->setSourceModel(rootModel);
     breadcrumbNavigationModel->setFilterBehavior(KSelectionProxyModel::ExactSelection);
 
     QListView *breadcrumbView = new QListView(vSplitter);
     //   SON(breadcrumbNavigationModel);
     breadcrumbView->setModel(breadcrumbNavigationModel);
 
     // This shouldn't operate on rootSelectionModel. It should operate on oneway instead?
     KLinkItemSelectionModel *breadcrumbViewSelectionModel = new KLinkItemSelectionModel(breadcrumbNavigationModel, rootSelectionModel, this);
     SON(breadcrumbViewSelectionModel);
 
     KForwardingItemSelectionModel *oneway2 =
         new KForwardingItemSelectionModel(breadcrumbNavigationModel, breadcrumbViewSelectionModel, KForwardingItemSelectionModel::Reverse);
     SON(oneway2);
 
     breadcrumbView->setSelectionModel(oneway2);
 
     KSelectionProxyModel *currentItemSelectionModel = new KSelectionProxyModel(rootSelectionModel, this);
     currentItemSelectionModel->setFilterBehavior(KSelectionProxyModel::ExactSelection);
     currentItemSelectionModel->setSourceModel(rootModel);
     SON(currentItemSelectionModel);
 
     new CurrentItemLabel(currentItemSelectionModel, vSplitter);
 
     QListView *selectionView = new QListView(vSplitter);
 
     // Need a one-way connection from rootSelectionModel to rootSelectionModel2
 
     KForwardingItemSelectionModel *oneway = new KForwardingItemSelectionModel(rootModel, rootSelectionModel);
 
     KNavigatingProxyModel *navigatingProxyModel = new KNavigatingProxyModel(oneway, this);
     SON(navigatingProxyModel);
     navigatingProxyModel->setSourceModel(rootModel);
     selectionView->setModel(navigatingProxyModel);
 
     KLinkItemSelectionModel *selectedChildrenSelectionModel = new KLinkItemSelectionModel(navigatingProxyModel, rootSelectionModel, this);
 
     selectionView->setSelectionModel(selectedChildrenSelectionModel);
 }
 
 #include "moc_breadcrumbnavigationwidget.cpp"