@ -1,53 +1,47 @@
@@ -1,53 +1,47 @@
/****************************************************************************
* *
* * Copyright ( c ) 2009 Nokia Corporation and / or its subsidiary ( - ies ) .
* * All rights reserved .
* * Contact : Nokia Corporation ( qt - info @ nokia . com )
* *
* * This file is part of a Qt Solutions component .
* *
* * Commercial Usage
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* * GNU Lesser General Public License Usage
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* * General Public License version 2.1 as published by the Free Software
* * Foundation and appearing in the file LICENSE . LGPL included in th e
* * packaging of this file . Please review the following information to
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* *
* * In addition , as a special exception , Nokia gives you certa in
* * additional rights . These rights are described in the Nokia Qt LGPL
* * Exception version 1.1 , included in the file LGPL_EXCEPTION . txt in this
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* *
* * GNU General Public License Usage
* * Alternatively , this file may be used under the terms of the GNU
* * General Public License version 3.0 as published by the Free Software
* * Foundation and appearing in the file LICENSE . GPL included in the
* * packaging of this file . Please review the following information to
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* * Contact : http : //www.qt-project.org/legal
* *
* * This file is part of the Qt Solutions component .
* *
* * $ QT_BEGIN_LICENSE : BSD $
* * You may use this file under the terms of the BSD license as follows :
* *
* * " Redistribution and use in source and binary forms, with or without
* * modification , are permitted provided that the following conditions ar e
* * met :
* * * Redistributions of source code must retain the above copyright
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* * the documentation and / or other materials provided with the
* * distribution .
* * * Neither the name of Digia Plc and its Subsidiary ( - ies ) nor the names
* * of its contributors may be used to endorse or promote products derived
* * from this software without specific prior written permission .
* *
* *
* * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* * " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT
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* * A PARTICULAR PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE COPYRIGHT
* * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT , INDIRECT , INCIDENTAL ,
* * SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING , BUT NOT
* * LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS OF USE ,
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# include "qtsingleapplication.h"
# include "qtlocalpeer.h"
# include <QtGui/Q Widget>
# include <QWidget>
/*!
@ -68,28 +62,31 @@
@@ -68,28 +62,31 @@
that will be compared instead .
The application should create the QtSingleApplication object early
in the startup phase , and call isRunning ( ) or sendMessage ( ) to
find out if another instance of this application is already
running . Startup parameters ( e . g . the name of the file the user
wanted this new instance to open ) can be passed to the running
instance in the sendMessage ( ) function .
If isRunning ( ) or sendMessage ( ) returns false , it means that no
other instance is running , and this instance has assumed the role
as the running instance . The application should continue with the
initialization of the application user interface before entering
the event loop with exec ( ) , as normal . The messageReceived ( )
signal will be emitted when the application receives messages from
another instance of the same application .
If isRunning ( ) or sendMessage ( ) returns true , another instance is
already running , and the application should terminate or enter
client mode .
If a message is received it might be helpful to the user to raise
the application so that it becomes visible . To facilitate this ,
QtSingleApplication provides the setActivationWindow ( ) function
and the activateWindow ( ) slot .
in the startup phase , and call isRunning ( ) to find out if another
instance of this application is already running . If isRunning ( )
returns false , it means that no other instance is running , and
this instance has assumed the role as the running instance . In
this case , the application should continue with the initialization
of the application user interface before entering the event loop
with exec ( ) , as normal .
The messageReceived ( ) signal will be emitted when the running
application receives messages from another instance of the same
application . When a message is received it might be helpful to the
user to raise the application so that it becomes visible . To
facilitate this , QtSingleApplication provides the
setActivationWindow ( ) function and the activateWindow ( ) slot .
If isRunning ( ) returns true , another instance is already
running . It may be alerted to the fact that another instance has
started by using the sendMessage ( ) function . Also data such as
startup parameters ( e . g . the name of the file the user wanted this
new instance to open ) can be passed to the running instance with
this function . Then , the application should terminate ( or enter
client mode ) .
If isRunning ( ) returns true , but sendMessage ( ) fails , that is an
indication that the running instance is frozen .
Here ' s an example that shows how to convert an existing
application to use QtSingleApplication . It is very simple and does
@ -103,7 +100,6 @@
@@ -103,7 +100,6 @@
QApplication app ( argc , argv ) ;
MyMainWidget mmw ;
mmw . show ( ) ;
return app . exec ( ) ;
}
@ -114,19 +110,17 @@
@@ -114,19 +110,17 @@
QtSingleApplication app ( argc , argv ) ;
if ( app . isRunning ( ) )
return 0 ;
return ! app . sendMessage ( someDataString ) ;
MyMainWidget mmw ;
app . setActivationWindow ( & mmw ) ;
mmw . show ( ) ;
return app . exec ( ) ;
}
\ endcode
Once this QtSingleApplication instance is destroyed ( for example ,
when the user quit s) , when the user next attempts to run the
Once this QtSingleApplication instance is destroyed ( normally when
the process exits or crashe s) , when the user next attempts to run the
application this instance will not , of course , be encountered . The
next instance to call isRunning ( ) or sendMessage ( ) will assume the
role as the new running instance .
@ -176,6 +170,7 @@ QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char *
@@ -176,6 +170,7 @@ QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char *
sysInit ( appId ) ;
}
# if QT_VERSION < 0x050000
/*!
Creates a QtSingleApplication object . The application identifier
@ -189,7 +184,7 @@ QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
@@ -189,7 +184,7 @@ QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
}
# if defined(Q_WS_X11)
# if defined(Q_WS_X11)
/*!
Special constructor for X11 , ref . the documentation of
QApplication ' s corresponding constructor . The application identifier
@ -227,7 +222,8 @@ QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int
@@ -227,7 +222,8 @@ QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int
{
sysInit ( appId ) ;
}
# endif
# endif // Q_WS_X11
# endif // QT_VERSION < 0x050000
/*!
Vladimir Golovnev (Glassez)
11 years ago
committed by