(C++) QTableViewExample9

 

 

QTableView example 9: two tables with checkboxes and editable text using a custom model is a QTableView example.

 

• View a screenshot of 'QTableViewExample9' (png)
• Download the Qt Creator project 'QTableViewExample9' (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: ./CppQTableViewExample9/CppQTableViewExample9.pro

 

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

 

 

 

 

 

./CppQTableViewExample9/mymodel.h

 

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#ifndef MYMODEL_H #define MYMODEL_H //#include <QAbstractTableModel> #include <QStandardItemModel> struct MyModel : public QStandardItemModel { public:   MyModel(QObject *parent = 0);   void AddRow(); private: }; #endif // MYMODEL_H

 

 

 

 

 

./CppQTableViewExample9/mymodel.cpp

 

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#include "mymodel.h" #include <cassert> MyModel::MyModel(QObject *parent)   : QStandardItemModel(parent) {   setColumnCount(3);   setHeaderData(0,Qt::Horizontal,"Y");   setHeaderData(1,Qt::Horizontal,"N");   setHeaderData(2,Qt::Horizontal,"Question");   for (int i=0; i!=5; ++i) AddRow(); } void MyModel::AddRow() {   QList<QStandardItem*> items;   //Add 'yes' checkbox   {     QStandardItem * const item = new QStandardItem;     item->setCheckable(true);     item->setEditable(false);     item->setCheckState(Qt::Unchecked);     items.push_back(item);   }   //Add 'no' checkbox   {     QStandardItem * const item = new QStandardItem;     item->setCheckable(true);     item->setEditable(false);     item->setCheckState(Qt::Unchecked);     items.push_back(item);   }   //Add 'yes' checkbox   {     QStandardItem * const item = new QStandardItem;     item->setEditable(true);     item->setText("Is this a useful question?");     items.push_back(item);   }   assert(columnCount() == items.size());   appendRow(items);   emit layoutChanged(); }

 

 

 

 

 

./CppQTableViewExample9/qtdialog.h

 

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

 

 

 

 

 

./CppQTableViewExample9/qtdialog.cpp

 

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#include "qtdialog.h" #include <cassert> #include "mymodel.h" #include "ui_qtdialog.h" QtDialog::QtDialog(QWidget *parent) :   QDialog(parent),   ui(new Ui::QtDialog) {   ui->setupUi(this);   MyModel * const model = new MyModel(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; } void QtDialog::on_button_clicked() {   QTableView * const view = ui->table_1->hasFocus() ? ui->table_1 : ui->table_2;   dynamic_cast<MyModel*>(view->model())->AddRow(); //Other view will synchronize   view->scrollToBottom();   const int n_rows = view->model()->rowCount();   view->setCurrentIndex(view->model()->index(n_rows-1,2)); }

 

 

 

 

 

./CppQTableViewExample9/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(); }