Archived:Creating Context Menu from QPushButton
26 Sep
2009
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Article
Contents |
Introduction
This article shows how to create a popup menu using "styled" push button in a QWidget based application.
The menu is launched using a QPushButton.
Class Definition
#include <QMainWindow>
#include "QHBoxLayout"
#include "QPushButton"
namespace Ui {
class Button;
}
class Button : public QMainWindow
{
Q_OBJECT
public:
explicit Button(QWidget *parent = 0);
~Button();
private:
QWidget* win;
QHBoxLayout *lay;
QMenu *menu;
QPushButton* but1;
};
#endif // BUTTON_H
We implement the Push Button in a class called Button, which we derive from QMainWindow. Here we are particularly interested the constructor, so lets discuss below about the constructor in the Class Implementation.
Class Implementation
#include "button.h"
Button::Button(QWidget *parent) :
QMainWindow(parent)
{
win=new QWidget(this);
win->resize(400,500);
lay=new QHBoxLayout(this);
menu=new QMenu(this);
menu->addMenu("Nokia");
menu->addMenu("N96");
menu->addMenu("N97");
but1=new QPushButton("Menu",this);
but1->setMenu(menu);
lay->addWidget(but1);
win->setLayout(lay);
win->setStyleSheet("* { background-color:rgb(125,100,50);color:rgb(200,150,100); padding: 7px}}");
}
Button::~Button()
{
}
In the constructor we create a QWidget (widget) of size 400x500 along with a QHBoxLayout (Layout). We create the QMenu (menu) and add items in the menu. Button have been created using QPushButton and add the button to the widget using addWidget() and then set the widget layout through setLayout() method . setStyleSheet() property holds the widget's style sheet.
Screenshot
Source Code
The full source code presented in this article is available here File:Button.zip
