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(C++) QTableWidgetExample3

 

QtQt CreatorLubuntu

 

QTableWidget example 3: checkboxes and text modifying external data is a QTableView example.

 

Technical facts

 

Application type(s)

Operating system(s) or programming environment(s)

IDE(s):

Project type:

C++ standard:

Compiler(s):

Libraries used:

 

 

 

 

 

Qt project file: ./CppQTableWidgetExample3/CppQTableWidgetExample3.pro

 

exists (../../DesktopApplication.pri) {
  include(../../DesktopApplication.pri)
}
!exists (../../DesktopApplication.pri) {
  QT += core
  QT += gui
  greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  CONFIG   += console
  CONFIG   -= app_bundle
  TEMPLATE = app
  CONFIG(release, debug|release) {
    DEFINES += NDEBUG NTRACE_BILDERBIKKEL
  }
  QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++
  unix {
    QMAKE_CXXFLAGS += -Werror
  }
}

exists(../../Libraries/Boost.pri) {
  include(../../Libraries/Boost.pri)
}
!exists(../../Libraries/Boost.pri) {
  win32 {
    INCLUDEPATH += \
      ../../Libraries/boost_1_55_0
  }
}

SOURCES +=\
    qtmain.cpp \
    qtdialog.cpp

HEADERS  += \
    qtdialog.h

FORMS    += \
    qtdialog.ui

RESOURCES += \
    CppQTableWidgetExample3.qrc

 

 

 

 

 

./CppQTableWidgetExample3/qtdialog.h

 

#ifndef QTDIALOG_H
#define QTDIALOG_H

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#include <QDialog>
#pragma GCC diagnostic pop

namespace Ui {
  class QtDialog;
}

class QtDialog : public QDialog
{
  Q_OBJECT

public:
  explicit QtDialog(QWidget *parent = 0);
  QtDialog(const QtDialog&) = delete;
  QtDialog& operator=(const QtDialog&) = delete;
  ~QtDialog() noexcept;

private:
  Ui::QtDialog *ui;
};

#endif // QTDIALOG_H

 

 

 

 

 

./CppQTableWidgetExample3/qtdialog.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#include "qtdialog.h"

#include <string>

#include <boost/lexical_cast.hpp>

#include "ui_qtdialog.h"
#pragma GCC diagnostic pop

QtDialog::QtDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::QtDialog)
{
  ui->setupUi(this);

  QTableWidget * const t = ui->tableWidget;
  t->setRowCount(10);
  const int n_rows = t->rowCount();
  const int n_cols = t->columnCount();
  for (int col=0; col!=n_cols; ++col)
  {
    for (int row=0; row!=n_rows; ++row)
    {
      t->setRowHeight(row,ui->tableWidget->fontMetrics().height() * 2 * (row + 1));

      QTableWidgetItem * const i = new QTableWidgetItem;
      if (col != 3)
      {
        //Checkbox
        i->setFlags(
            Qt::ItemIsSelectable
          | Qt::ItemIsUserCheckable
          //| Qt::ItemIsEnabled
        );
        //i->setFlags(
        //    Qt::ItemIsSelectable
        //  | Qt::ItemIsUserCheckable
        //  | Qt::ItemIsEnabled
        //);
        i->setCheckState(Qt::Unchecked);
      }
      else
      {
        //Text
        i->setFlags(
            Qt::ItemIsSelectable
          | Qt::ItemIsEditable
          | Qt::ItemIsEnabled);
        std::string s;
        for (int sub_row=0;sub_row!=row; ++sub_row)
        {
          s += boost::lexical_cast<std::string>(sub_row) + "\n";
        }
        if (!s.empty()) s.resize(s.size() - 1);
        i->setText(s.c_str());
      }
      t->setItem(row, col, i);
    }
  }
  t->setColumnWidth(0,24);
  t->setColumnWidth(1,24);
  t->setColumnWidth(2,24);
}

QtDialog::~QtDialog() noexcept
{
  delete ui;
}

 

 

 

 

 

./CppQTableWidgetExample3/qtmain.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#include <QApplication>
#include "qtdialog.h"
#pragma GCC diagnostic pop

int main(int argc, char *argv[])
{
  QApplication a(argc, argv);
  QtDialog w;
  w.show();
  return a.exec();
}

 

 

 

 

 

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