33.Qt模型与视图

 #include "mainwindow.h"
 #include <QApplication>
 #include <QAbstractItemModel>
 #include <QAbstractItemView>
 #include <QItemSelectionModel>

 #include <QDirModel>
 #include <QTreeView>
 #include <QListView>
 #include <QTableView>
 #include <QSplitter>

 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);

     QDirModel model;//模型

     QTreeView treeview;//视图(共享模型)
     QListView listview;
     QTableView tableview;

     treeview.setModel(&model);
     treeview.setSelectionMode(QAbstractItemView::MultiSelection);

     listview.setModel(&model);
     listview.setSelectionModel(treeview.selectionModel());

     tableview.setModel(&model);
     tableview.setSelectionModel(treeview.selectionModel());

     QSplitter *splitter = new QSplitter;
     splitter->addWidget(&treeview);
     splitter->addWidget(&listview);
     splitter->addWidget(&tableview);

     splitter->show();

     QObject::connect(&treeview,SIGNAL(doubleClicked(QModelIndex)),&listview,SLOT(setRootIndex(QModelIndex)));
     QObject::connect(&treeview,SIGNAL(doubleClicked(QModelIndex)),&tableview,SLOT(setRootIndex(QModelIndex)));

     return a.exec();
 }