(C++) QTableViewExample6

 

 

QTableView example 6: two views on one model is a QTableView example.

 

This was to demonstrate that if two tables must remain identical, the model/view architecture is an easy way to do so: because the two views work on the same model, they cannot be different.

 

• View a screenshot of 'QTableViewExample6' (png)
• Download the Qt Creator project 'QTableViewExample6' (zip)

Technical facts

 

Application type(s)

• Desktop application

Operating system(s) or programming environment(s)

• Lubuntu 15.04 (vivid)

IDE(s):

• Qt Creator 3.1.1

Project type:

• GUI application

C++ standard:

• C++11

Compiler(s):

• G++ 4.9.2

Libraries used:

• Qt: version 5.4.1 (32 bit)
• STL: GNU ISO C++ Library, version 4.9.2

 

 

 

 

 

Qt project file: ./CppQTableViewExample6/CppQTableViewExample6.pro

 

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QT       += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets QMAKE_CXXFLAGS += -Wall -Wextra -Werror TEMPLATE = app QMAKE_CXXFLAGS += -std=c++11 SOURCES += \     qtdialog.cpp \     qtmain.cpp HEADERS  += qtdialog.h FORMS    += qtdialog.ui

 

 

 

 

 

./CppQTableViewExample6/qtdialog.h

 

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#ifndef QTDIALOG_H #define QTDIALOG_H #include <QDialog> namespace Ui {   class QtDialog; } struct MyModel; class QtDialog : public QDialog {   Q_OBJECT    public:   explicit QtDialog(QWidget *parent = 0);   ~QtDialog();    private slots: private:   Ui::QtDialog *ui;   ///The downcasted model   MyModel* m_model; }; #endif // QTDIALOG_H

 

 

 

 

 

./CppQTableViewExample6/qtdialog.cpp

 

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#include "qtdialog.h" #include <cassert> #include <iostream> #include <stdexcept> #include <boost/lexical_cast.hpp> #include <boost/numeric/conversion/cast.hpp> #include <QHeaderView> #include <QStandardItemModel> #include "ui_qtdialog.h" struct MyModel : public QStandardItemModel {   MyModel(QObject *parent = 0)     : QStandardItemModel(parent)   {     const int n_rows = 3;     const int n_cols = 4;     this->setColumnCount(n_cols);     this->setRowCount(n_rows);     for (int row = 0; row!=n_rows; ++row)     {       for (int col = 0; col!=n_cols; ++col)       {         QStandardItem * const item = new QStandardItem;         const std::string s           =             std::string("(")           + boost::lexical_cast<std::string>(row)           + std::string(",")           + boost::lexical_cast<std::string>(row)           + std::string(")");         item->setText(s.c_str());         this->setItem(row,col,item);       }     }   } }; QtDialog::QtDialog(QWidget *parent) :   QDialog(parent),   ui(new Ui::QtDialog),   m_model(new MyModel(this)) {   ui->setupUi(this);   ui->table_left->setModel(m_model);   ui->table_right->setModel(m_model);   assert(ui->table_left->model());   assert(ui->table_right->model());   assert(m_model);   assert(ui->table_left->model() == m_model);   assert(ui->table_right->model() == m_model); } QtDialog::~QtDialog() {   delete ui; }

 

 

 

 

 

./CppQTableViewExample6/qtmain.cpp

 

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#include <QApplication> #include "qtdialog.h" int main(int argc, char *argv[]) {   QApplication a(argc, argv);   QtDialog w;   w.show();   return a.exec(); }