(C++) QTreeWidgetExample6

QTreeWidgetExample6 is an example of QTreeWidgetExample6.

Technical facts

Application type(s)

Desktop application

Operating system(s) or programming environment(s)

Lubuntu 12.10 (quantal)

IDE(s):

Qt Creator 2.5.2

Project type:

GUI application

C++ standard:

C++98

Compiler(s):

G++ 4.7.2

Libraries used:

Qt: version 4.8.3 (32 bit)
STL: GNU ISO C++ Library, version 4.7.2

Qt project file: CppQTreeWidgetExample6.pro


QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = CppQTreeWidgetExample6

TEMPLATE = app

SOURCES += main.cpp

HEADERS  +=

FORMS    +=

main.cpp


#include <QApplication>

#include <QDesktopWidget>

#include <QTreeWidget>

#include <QTreeWidgetItem>



int main(int argc, char *argv[])

{

  QApplication a(argc, argv);



  QTreeWidget w;



  //Hide the header

  w.setHeaderHidden(true);



  //Add five top items, with nth-1 children

  for (int i=0; i!=5; ++i)

  {

    QTreeWidgetItem * const top_item = new QTreeWidgetItem;

    top_item->setText(0,QString::number(i));

    for (int j=0; j!=4-i; ++j)

    {

      QTreeWidgetItem * const child_item = new QTreeWidgetItem;

      child_item->setText(0,QString::number(i) + "-" + QString::number(j));

      top_item->addChild(child_item);

    }

    w.addTopLevelItem(top_item);

    top_item->setExpanded(true);

  }



  //Let the row colors alternate

  w.setAlternatingRowColors(true);



  //Put the QTreeWidget in the center of the screen at 25% of the screen its size

  {

    const QRect screen = QApplication::desktop()->screenGeometry();

    w.setGeometry(0,0,screen.width() * 1 / 5 ,screen.height() * 1 / 3);

    w.move( screen.center() - w.rect().center() );

  }

  w.show();



  return a.exec();

}

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