(C++) QTableViewExample10

 

 

QTableView example 10: two tables with checkboxes and editable text using a custom model and a custom data type is a QTableView example.

 

• View a screenshot of 'QTableViewExample10' (png)
• Download the Qt Creator project 'QTableViewExample10' (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: ./CppQTableViewExample10/CppQTableViewExample10.pro

 

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

 

 

 

 

 

./CppQTableViewExample10/mydata.h

 

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#ifndef MYDATA_H #define MYDATA_H #include <string> #include <tuple> #include <vector> struct MyData {   MyData();   bool GetNo(const int row) const { return std::get<0>(m_data[row]); };   const std::string& GetQuestion(const int row) const { return std::get<2>(m_data[row]); };   int GetRowCount() const { return static_cast<int>(m_data.size()); }   bool GetYes(const int row) const { return std::get<1>(m_data[row]); };   void SetNo(const int row, const bool yes_no) { std::get<0>(m_data[row]) = yes_no; }   void SetQuestion(const int row, const std::string& question)  { std::get<2>(m_data[row]) = question; }   void SetYes(const int row, const bool yes_no) { std::get<1>(m_data[row]) = yes_no; }   private:   std::vector<std::tuple<bool,bool,std::string> > m_data;   static const std::vector<std::tuple<bool,bool,std::string> > CreateData(); }; #endif // MYDATA_H

 

 

 

 

 

./CppQTableViewExample10/mydata.cpp

 

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#include "mydata.h" MyData::MyData()   : m_data(CreateData()) { } const std::vector<std::tuple<bool,bool,std::string> > MyData::CreateData() {   return   {     std::make_tuple(false,false,"Question A"),     std::make_tuple(false,true ,"Question B"),     std::make_tuple(true ,false,"Question C"),     std::make_tuple(true ,true ,"Question D"),   }; }

 

 

 

 

 

./CppQTableViewExample10/mymodel.h

 

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#ifndef MYMODEL_H #define MYMODEL_H #include <QAbstractTableModel> #include <boost/shared_ptr.hpp> struct MyData; struct MyModel : public QAbstractTableModel {   MyModel(const boost::shared_ptr<MyData> data, QObject *parent = 0);   int columnCount(const QModelIndex &parent) const;   QVariant data(const QModelIndex &index, int role) const;   Qt::ItemFlags flags(const QModelIndex &index) const;   QVariant headerData(int section, Qt::Orientation orientation, int role) const;   int rowCount(const QModelIndex &parent) const;   bool setData(const QModelIndex &index, const QVariant &value, int role);   private:   const boost::shared_ptr<MyData> m_data; }; #endif // MYMODEL_H

 

 

 

 

 

./CppQTableViewExample10/mymodel.cpp

 

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#include "mymodel.h" #include <cassert> #include <QStandardItem> #include "mydata.h" MyModel::MyModel(const boost::shared_ptr<MyData> data, QObject *parent)   : QAbstractTableModel(parent),     m_data(data) { } int MyModel::columnCount(const QModelIndex &) const {   return 3; } QVariant MyModel::data(const QModelIndex &index, int role) const {   switch (index.column())   {     case 0:       if (role == Qt::DisplayRole || role == Qt::CheckStateRole)         return m_data->GetYes(index.row()) ? Qt::Checked : Qt::Unchecked;     case 1:       if (role == Qt::DisplayRole || role == Qt::CheckStateRole)         return m_data->GetNo(index.row()) ? Qt::Checked : Qt::Unchecked;     case 2:       if (role == Qt::DisplayRole || role == Qt::EditRole)         return m_data->GetQuestion(index.row()).c_str();   }   return QVariant(); } Qt::ItemFlags MyModel::flags(const QModelIndex &index) const {   switch (index.column())   {     case 0:     case 1:       return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable;     case 2:       return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable;   }   return Qt::NoItemFlags; } QVariant MyModel::headerData(int section, Qt::Orientation orientation, int /*role*/) const {   if (orientation == Qt::Horizontal)   {     switch (section)     {       case 0: return "Y";       case 1: return "N";       case 2: return "Question";       default: assert(!"Should not get here");     }   }   else   {     return section;   } } int MyModel::rowCount(const QModelIndex &) const {   return m_data->GetRowCount(); } bool MyModel::setData(const QModelIndex &index, const QVariant &value, int role) {   switch (index.column())   {     case 0:       if (role == Qt::CheckStateRole)         m_data->SetYes(index.row(),value.toInt() == Qt::Checked);     break;     case 1:       if (role == Qt::CheckStateRole)         m_data->SetNo(index.row(),value.toInt() == Qt::Checked);     break;     case 2:       if (role == Qt::EditRole)         m_data->SetQuestion(index.row(),value.toString().toStdString());     break;   }   emit dataChanged(index,index);   return true; }

 

 

 

 

 

./CppQTableViewExample10/qtdialog.h

 

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#ifndef QTDIALOG_H #define QTDIALOG_H #include <boost/shared_ptr.hpp> #include <QDialog> struct MyData; namespace Ui {   class QtDialog; } struct QStandardItemModel; class QtDialog : public QDialog {   Q_OBJECT    public:   explicit QtDialog(QWidget *parent = 0);   ~QtDialog();    private slots: private:   Ui::QtDialog *ui;   boost::shared_ptr<MyData> m_data; }; #endif // QTDIALOG_H

 

 

 

 

 

./CppQTableViewExample10/qtdialog.cpp

 

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#include "qtdialog.h" #include <cassert> #include "mydata.h" #include "mymodel.h" #include "ui_qtdialog.h" QtDialog::QtDialog(QWidget *parent) :   QDialog(parent),   ui(new Ui::QtDialog),   m_data(new MyData) {   ui->setupUi(this);   MyModel * const model = new MyModel(m_data,this);   assert(!ui->table_1->model());   assert(!ui->table_2->model());   ui->table_1->setModel(model);   ui->table_2->setModel(model);   assert(ui->table_1->model());   assert(ui->table_2->model());   ui->table_1->setColumnWidth(0, 24);   ui->table_2->setColumnWidth(0, 24);   ui->table_1->setColumnWidth(1, 24);   ui->table_2->setColumnWidth(1, 24);   ui->table_1->setColumnWidth(2,175);   ui->table_2->setColumnWidth(2,175); } QtDialog::~QtDialog() {   delete ui; }

 

 

 

 

 

./CppQTableViewExample10/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(); }