There are multiple ways to get information about the screen size, as shown in the code below.


#include <iostream>

#include <QApplication>

#include <QDesktopWidget>



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

{

  //Must create a dummy application for QApplication::desktop() to work

  QApplication a(argc,argv);

  const int width  = QApplication::desktop()->width();

  const int height = QApplication::desktop()->height();

  const QRect rect = QApplication::desktop()->rect();



  const int left  = rect.left();

  const int right = rect.right();

  const int bottom = rect.bottom();

  const int top = rect.top();



  std::cout

    << "Width: " << width << '\n'

    << "Height: " << height << '\n'

    << "Left (x1): " << left << '\n'

    << "Top (y1): " << top << '\n'

    << "Right (x2): " << right << '\n'

    << "Bottom (y2): " << bottom << '\n'

    << "QRect width: " << rect.width() << '\n'

    << "QRect height: " << rect.height() << '\n';

}

Screen output:


Width: 1024

Height: 768

Left (x1): 0

Top (y1): 0

Right (x2): 1023

Bottom (y2): 767

QRect width: 1024

QRect height: 768

Project file:


#-------------------------------------------------

#

# Project created by QtCreator 2010-05-24T14:19:24

#

#-------------------------------------------------

TARGET = CppGetScreenSize

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

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(C++) How to get the screen size?