QT选择模型与信号的关联

QT选择模型与信号的关联

QT选择模型与信号的关联.rar-QT文档类资源-CSDN下载QT选择模型与信号的关联.rarhttps://txwtech.blog.csdn.net/art更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/txwtech/86736370?spm=1001.2014.3001.5503

#ifndef MAINWINDOW16_6MYSELECTION_H
#define MAINWINDOW16_6MYSELECTION_H

#include 
class QTableView;//new add
//section3 P365
//src16_8
class QItemSelection;
class QModelIndex;

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow16_6myselection; }
QT_END_NAMESPACE

class MainWindow16_6myselection : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow16_6myselection(QWidget *parent = nullptr);
    ~MainWindow16_6myselection();

private:
    Ui::MainWindow16_6myselection *ui;
    //new add
    QTableView *tableView;
    //QItemSelectionModel::Toggle的效果

    //section3 P366
    QTableView *tableView2;
public slots:
    void GetCurrentItemData();
    void ToggleSelection();
    //section3 P365
    void UpdateSelection(const QItemSelection &selected,const QItemSelection &deselected);
    void ChangeCurrent(const QModelIndex ¤t,const QModelIndex &previous);
};
#endif // MAINWINDOW16_6MYSELECTION_H

#include "mainwindow16_6myselection.h"
#include "ui_mainwindow16_6myselection.h"
#include 
#include 
#include 
//#include 
//使用选择模型

MainWindow16_6myselection::MainWindow16_6myselection(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow16_6myselection)
{
    ui->setupUi(this);
    //new add
    QStandardItemModel *model2=new QStandardItemModel(7,4,this);
    for(int row=0;rowsetModel(model2);//模型放入tableview表格视图
    setCentralWidget(tableView);//表格视图放入到主界面的控件区域
    //获取视图项目的选择模型
    QItemSelectionModel *selectionModel2 = tableView->selectionModel();//定义左上角和右下角的索引，然后使用这两个索引创建选择
    QModelIndex topLeft;
    QModelIndex bottomRight;
    topLeft=model2->index(1,1,QModelIndex());
    bottomRight=model2->index(5,2,QModelIndex());
    QItemSelection selection(topLeft,bottomRight);//选择模型
    //使用指定的选择模式来选择项目
    selectionModel2->select(selection,QItemSelectionModel::Select);

    //添加工具栏动作：
    //添加方法：https://blog.csdn.net/txwtech/article/details/126593636?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166496282316782395354464%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=166496282316782395354464&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~rank_v31_ecpm-1-126593636-null-null.nonecase&utm_term=qt%20%E5%B7%A5%E5%85%B7%E6%A0%8F&spm=1018.2226.3001.4450
    ui->toolBar->addAction(tr("当前项目"),this,&MainWindow16_6myselection::GetCurrentItemData);
    ui->toolBar->addAction(tr("切换选择"),this,&MainWindow16_6myselection::ToggleSelection);

    //section3 P365
   connect(selectionModel2,&QItemSelectionModel::selectionChanged,this,&MainWindow16_6myselection::UpdateSelection);
   connect(selectionModel2,&QItemSelectionModel::currentChanged,this,&MainWindow16_6myselection::ChangeCurrent);

   //P366
   tableView2=new QTableView;
   tableView2->setWindowTitle("tableView2");
   tableView2->resize(400,300);
   tableView2->setModel(model2);
   tableView2->setSelectionModel(selectionModel2);
   tableView2->show();


}

MainWindow16_6myselection::~MainWindow16_6myselection()
{
    delete ui;
    delete tableView2;
}

void MainWindow16_6myselection::GetCurrentItemData()
{
    qDebug()index(0,0,QModelIndex());
  QModelIndex bottomRight=tableView->model()->index(tableView->model()->rowCount()-1,tableView->model()->columnCount(QModelIndex())-1,QModelIndex());
  QItemSelection curSelection(topLeft,bottomRight);
  tableView->selectionModel()->select(curSelection,QItemSelectionModel::Toggle);
}

void MainWindow16_6myselection::UpdateSelection(const QItemSelection &selected, const QItemSelection &deselected)
{
    QModelIndex index2;
    QModelIndexList list2=selected.indexes();
    //为现在选择的项目填充值
    foreach(index2,list2)
    {
        QString text2=QString("%1,%2").arg(index2.row()).arg(index2.column());
        tableView->model()->setData(index2,text2);
    }
    list2=deselected.indexes();//获取所有选择项目的索引
    //清空上一次选择的项目的内容
    foreach(index2,list2)
    {
        tableView->model()->setData(index2,"");
    }
}

void MainWindow16_6myselection::ChangeCurrent(const QModelIndex ¤t, const QModelIndex &previous)
{
    qDebug()