diff options
Diffstat (limited to 'examples/tutorials/modelview/7_selections/modelview.cpp')
-rwxr-xr-x | examples/tutorials/modelview/7_selections/modelview.cpp | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/examples/tutorials/modelview/7_selections/modelview.cpp b/examples/tutorials/modelview/7_selections/modelview.cpp new file mode 100755 index 0000000..49c5bb8 --- /dev/null +++ b/examples/tutorials/modelview/7_selections/modelview.cpp @@ -0,0 +1,63 @@ +#include <QTreeView> +#include <QStandardItemModel> +#include <QItemSelectionModel> +#include "modelview.h" + +ModelView::ModelView(QWidget *parent) + : QMainWindow(parent) +{ + treeView = new QTreeView(this); + setCentralWidget(treeView); + standardModel = new QStandardItemModel ; + QStandardItem *rootNode = standardModel->invisibleRootItem(); + + + //defining a couple of items + QStandardItem *americaItem = new QStandardItem("America"); + QStandardItem *mexicoItem = new QStandardItem("Canada"); + QStandardItem *usaItem = new QStandardItem("USA"); + QStandardItem *bostonItem = new QStandardItem("Boston"); + QStandardItem *europeItem = new QStandardItem("Europe"); + QStandardItem *italyItem = new QStandardItem("Italy"); + QStandardItem *romeItem = new QStandardItem("Rome"); + QStandardItem *veronaItem = new QStandardItem("Verona"); + + //building up the hierarchy + rootNode-> appendRow(americaItem); + rootNode-> appendRow(europeItem); + americaItem-> appendRow(mexicoItem); + americaItem-> appendRow(usaItem); + usaItem-> appendRow(bostonItem); + europeItem-> appendRow(italyItem); + italyItem-> appendRow(romeItem); + italyItem-> appendRow(veronaItem); + + //register the model + treeView->setModel( standardModel ); + treeView->expandAll(); + + //selection changes shall trigger a slot + QItemSelectionModel *selectionModel= treeView->selectionModel(); + connect(selectionModel, SIGNAL(selectionChanged ( const QItemSelection & , const QItemSelection & )), + this, SLOT(selectionChangedSlot(const QItemSelection & , const QItemSelection & ))); +} + +//------------------------------------------------------------------------------------ +void ModelView::selectionChangedSlot(const QItemSelection & /*newSelection*/, const QItemSelection & /*oldSelection*/) +{ + const QModelIndex index = treeView->selectionModel()->currentIndex(); + QString selectedText = index.data(Qt::DisplayRole).toString(); + int hierarchyLevel=1; + QModelIndex seekRoot = index; + while(seekRoot.parent() != QModelIndex() ) + { + seekRoot = seekRoot.parent(); + hierarchyLevel++; + } + QString showString = QString("%1, Level %2").arg(selectedText) + .arg(hierarchyLevel); + setWindowTitle(showString); +} + + + |