程序

main.cpp
#include "mainwindow.h"
#include <QApplication>
#include <QTreeView>
#include <QListView>
#include <QTableView>
#include <QDirModel>
#include <QSplitter>
#include <QAbstractItemModel>
#include <QAbstractItemView>
#include <QItemSelectionModel>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QDirModel model;//新建模型对象为查询数据做准备
    /* 新建三种不同的View对象，以便文件目录可以以三种不同的方式显示 */
    QTreeView tree;
    QListView list;
    QTableView table;
    tree.setModel(&model);
    list.setModel(&model);
    table.setModel(&model);
    tree.setSelectionMode(QAbstractItemView::MultiSelection);//设置选择方式为多选
    list.setSelectionModel(tree.selectionModel());//设置选择方式为QTreeView的选择方式
    table.setSelectionModel(tree.selectionModel());//设置选择方式为QTreeView的选择方式
    QObject::connect(&tree,SIGNAL(doubleClicked(QModelIndex)),&list,SLOT(setRootIndex(QModelIndex)));
    QObject::connect(&list,SIGNAL(doubleClicked(QModelIndex)),&table,SLOT(setRootIndex(QModelIndex)));
    QSplitter *splitter =new QSplitter;
    splitter->addWidget(&tree);
    splitter->addWidget(&list);
    splitter->addWidget(&table);
    splitter->setWindowTitle("Model/View");
    splitter->show();
    //MainWindow w;
    //w.show();

    return a.exec();
}

效果展示