Qt for beginners Exercise 1 answer: Difference between revisions

From Qt Wiki
Jump to navigation Jump to search
(Convert ExpressionEngine section headers)
(Redirect to Qt for Beginners (Merged))
 
(One intermediate revision by one other user not shown)
Line 1: Line 1:
{{Cleanup | reason=Auto-imported from ExpressionEngine.}}
#REDIRECT [[Qt for Beginners]]
 
[toc align_right="yes" depth="3"]
[[Category:Qt_for_beginners]]
[[Category:Tutorial]]
[[Category:HowTo]]
 
= Qt for beginners — Exercise 1 : basis (Answer) =
 
[[Qt_for_beginners_Exercise_1_basis|<<< Exercise 1 : basis]] | [[Qt_for_beginners|Summary]] | Exercise 2 >>>
 
== Widgets ==
 
Since this application seems to be quite complicated, we have chosen to split into several files :
 
''main.cpp''
<code>
#include <QApplication>
#include "window.h"
 
int main(int argc, char **argv)
{
QApplication app (argc, argv);
 
Window window;
window.show();
 
return app.exec();
}
</code>
 
''window.h''
<code>
#ifndef WINDOW_H
#define WINDOW_H
 
#include <QWidget>
 
class QPushButton;
class QRadioButton;
class Window : public QWidget
{
public:
explicit Window(QWidget *parent = 0);
private:
QRadioButton *m_chickenButton;
QRadioButton *m_sandwichButton;
QRadioButton *m_soupButton;
 
QPushButton *m_selectButton;
};
 
#endif // WINDOW_H
</code>
 
''window.cpp''
<code>
#include "window.h"
 
#include <QRadioButton>
#include <QPushButton>
#include <QButtonGroup>
 
Window::Window(QWidget *parent) :
QWidget(parent)
{
// Set size of the window
setFixedSize(200, 150);
 
// Create and position the button
m_chickenButton = new QRadioButton("Roasted chicken", this);
m_chickenButton->setGeometry(10, 10, 180, 30);
 
m_sandwichButton = new QRadioButton("Sandwich", this);
m_sandwichButton->setGeometry(10, 40, 180, 30);
 
m_soupButton = new QRadioButton("Soup", this);
m_soupButton->setGeometry(10, 70, 180, 30);
 
m_selectButton = new QPushButton("Select this menu", this);
m_selectButton->setGeometry(10, 110, 180, 30);
 
QButtonGroup '''group = new QButtonGroup(this);
group->addButton(m_chickenButton);
group->addButton(m_sandwichButton);
group->addButton(m_soupButton);
}
</code>
 
You can also remove the buttons from the attributes list and put the inside the constructor.
 
 
== Signals and slots ==
<code>
#include <QApplication>
#include <QPushButton>
 
int main(int argc, char'''*argv)
{
QApplication app (argc, argv);
 
QWidget window;
window.setFixedSize(100, 80);
 
QPushButton *buttonInfo = new QPushButton("Info", &amp;window);
buttonInfo->setGeometry(10, 10, 80, 30);
 
QPushButton *buttonQuit = new QPushButton("Quit", &amp;window);
buttonQuit->setGeometry(10, 40, 80, 30);
 
window.show();
 
// Connections
// Connecting the button associated to info to the "aboutQt" slot of QApplication
QObject::connect(buttonInfo, SIGNAL (clicked()), &amp;app, SLOT (aboutQt()));
 
// Connecting the button associated to close to the "quit" slot of QApplication
QObject::connect(buttonQuit, SIGNAL (clicked()), &amp;app, SLOT (quit()));
 
return app.exec();
}
</code>

Latest revision as of 14:35, 5 May 2015

Redirect to:

Retrieved from "https://wiki.qt.io/index.php?title=Qt_for_beginners_Exercise_1_answer&oldid=16582"