Archived:How to use QAction

Comments

14 Sep
2009

---

22 Sep
2009

---

Log in or Join to leave comments.

Archived: This article is archived because it is not considered relevant for third-party developers creating commercial solutions today. If you think this article is still relevant, let us know by adding the template {{ReviewForRemovalFromArchive|user=~~~~|write your reason here}}.

Qt Quick should be used for all UI development on mobile devices. The approach described in this article (based on QWidget) is deprecated.

Article Metadata

---

Tested with

Devices(s): Symbian emulator

---

Compatibility

Platform(s): Qt

---

Platform Security

Signing Required: Self-Signed

Capabilities: None

---

Article

Keywords: QAction

Created: james1980 (17 Jan 2009)

Last edited: hamishwillee (11 Oct 2012)

Overview

This code snippet demonstrates how to use QAction, the class which represents an action in Qt menus and toolbars.

Qt provides the QAction class for an abstract user interface action that can be inserted into widgets. Normally user performs different task in a different way. Whether a task is performed from the menu or from the toolbar or using shortcut key it must be perform in the same manner. So in Qt each command or task is represented as a Action. Than we can add this action to the menu or toolbar. Hence command is executed in the same manner regardless of the user interface used.

QAction *newAct=new QAction();

Download

• Download and install the Qt SDK

Various Function

• Used to set the Icon text

newAct->setIconText("Nokia");

• To add an action to a Action group.

newAct->setActiongroup(QActionGroup *object);

• To auto repeat any of the Action.

newAct->setAutoRepeat(1);

• This property Holds the action escriptive text.

QAction::setText("Helllo");

Code Snippet

#include "menuwindow.h"
 
menuwindow::menuwindow(QWidget *parent)
    : QMainWindow(parent)
{
        //...some code	
 
        newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
        newAct->setShortcut(tr("Ctrl+N"));
        newAct->setStatusTip(tr("Create a new file"));
        connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
 
        exitAct = new QAction(tr("E&xit"), this);
        exitAct->setShortcut(tr("Ctrl+Q"));
 
        exitAct->setStatusTip(tr("Exit the application"));
        connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
 
        // .. some code
 
        fileMenu = menuBar()->addMenu(tr("&File"));
        fileMenu->addAction(newAct);
 
 
        fileMenu->addSeparator();
        fileMenu->addAction(exitAct);
 
        // ... some code
}
menuwindow::~menuwindow
{
    if(newAct)
    {
        delete newAct;
    }
    if(exitAct)
    {
        delete exitAct;
    }
    if(fileMenu)
    {
         delete fileMenu;
    }
 
}

Related Example

Archived:How to create a menu in Qt shows the use of QAction.