Using Publish and Subscribe APIs in Qt - Revision history

Hamishwillee: Text replace - "`" to ""`


2012-10-11T01:23:36Z
Text replace - "<code cpp>" to "<code cpp-qt>"

			
			
			
			
		
		← Older revision
		Revision as of 01:23, 11 October 2012
		
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  ==Headers required==   ==Headers required==
− <code cpp> + <code cpp-qt>
  #include <qvaluespacesubscriber.h>   #include <qvaluespacesubscriber.h>
  #include <qvaluespacepublisher.h>   #include <qvaluespacepublisher.h>
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  Create a .qcrml file (here myPublisher.qcrml) in your publisher application and deploy it in c:/resource/qt/crml directory. Note that the '''uidValue''' in .qcrml file must be the same as UID of application that suppose to publish content.   Create a .qcrml file (here myPublisher.qcrml) in your publisher application and deploy it in c:/resource/qt/crml directory. Note that the '''uidValue''' in .qcrml file must be the same as UID of application that suppose to publish content.
    
− <code cpp> + <code cpp-qt>
  <?xml version="1.0" encoding="UTF-8"?>   <?xml version="1.0" encoding="UTF-8"?>
  <repository target="RProperty" version="" uidName="repo" uidValue="0xE0633550">   <repository target="RProperty" version="" uidName="repo" uidValue="0xE0633550">
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  Modify your .pro file of publisher application.   Modify your .pro file of publisher application.
    
− <code cpp> + <code cpp-qt>
  CONFIG += mobility   CONFIG += mobility
  MOBILITY = publishsubscribe   MOBILITY = publishsubscribe
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  Modify your .pro file of subscriber application.   Modify your .pro file of subscriber application.
    
− <code cpp> + <code cpp-qt>
  INCLUDEPATH += D:/QtMobility/src/publishsubscribe   INCLUDEPATH += D:/QtMobility/src/publishsubscribe
  DEPENDPATH += D:/QtMobility/src/publishsubscribe   DEPENDPATH += D:/QtMobility/src/publishsubscribe
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  ==Header file==   ==Header file==
  '''Publisher.h'''   '''Publisher.h'''
− <code cpp> + <code cpp-qt>
    
  #ifndef PUBLISHER_H   #ifndef PUBLISHER_H
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Line 127:
    
  '''Subscriber.h'''   '''Subscriber.h'''
− <code cpp> + <code cpp-qt>
  #ifndef SUBSCRIBER_H   #ifndef SUBSCRIBER_H
  #define SUBSCRIBER_H   #define SUBSCRIBER_H
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  Publisher publish value using QValueSpacePublisher variable that can be subscribed by one or more subscriber.   Publisher publish value using QValueSpacePublisher variable that can be subscribed by one or more subscriber.
    
− <code cpp> + <code cpp-qt>
    
  #include "Publisher.h"   #include "Publisher.h"
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  Subscriber subscribe data, using QValueSpaceSubscriber variable, that is published by publisher.   Subscriber subscribe data, using QValueSpaceSubscriber variable, that is published by publisher.
    
− <code cpp> + <code cpp-qt>
  #include "Subscriber.h"   #include "Subscriber.h"
  #include <qvaluespacesubscriber.h>   #include <qvaluespacesubscriber.h>



Hamishwillee: Text replace - "Category:MeeGo" to "Category:MeeGo Harmattan"
2012-06-13T10:58:44Z
Text replace - "Category:MeeGo" to "Category:MeeGo Harmattan"

			
			
			
			
		
		← Older revision
		Revision as of 10:58, 13 June 2012
		
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  * Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.   * Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.
    
− [[Category:Code Examples]][[Category:MeeGo]] [[Category:Symbian]] + [[Category:Code Examples]][[Category:MeeGo Harmattan]] [[Category:Symbian]]



Hamishwillee: Hamishwillee - Addition to article of: Category:MeeGo Category:Symbian. (Add platform categories)
2012-02-15T05:45:53Z
Hamishwillee - Addition to article of: Category:MeeGo Category:Symbian. (Add platform categories)

			
			
			
			
		
		← Older revision
		Revision as of 05:45, 15 February 2012
		
Line 380:
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  * Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.   * Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.
    
− [[Category:Code Examples]] + [[Category:Code Examples]][[Category:MeeGo]] [[Category:Symbian]]



Hamishwillee: Hamishwillee - Bot change of template (Template:CodeSnippet) - now using Template:ArticleMetaData
2011-06-24T09:18:53Z
Hamishwillee - Bot change of template (Template:CodeSnippet) - now using Template:ArticleMetaData

			
			
			
			
		
		← Older revision
		Revision as of 09:18, 24 June 2011
		
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  [[Category:Qt Mobility]]   [[Category:Qt Mobility]]
− {{CodeSnippet + {{ArticleMetaData
  |id=...   |id=...
  |platform=S60 3rd Edition, FP1, FP2<br>S60 5th Edition   |platform=S60 3rd Edition, FP1, FP2<br>S60 5th Edition
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  |creationdate=March 25, 2010   |creationdate=March 25, 2010
  |keywords= QValueSpacePublisher, QValueSpaceSubscriber, QVariant, QPushButton, QLineEdit, QLabel   |keywords= QValueSpacePublisher, QValueSpaceSubscriber, QVariant, QPushButton, QLineEdit, QLabel
  + 
  + |sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
  + |installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
  + |sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
  + |devicecompatability=<!-- Compatible devices (e.g.: All* (must have GPS) ) -->
  + |signing=<!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
  + |capabilities=<!-- Capabilities required (e.g. Location, NetworkServices.) -->
  + |author=[[User:Yashu]]
  }}   }}
    




Kiran10182: moved Using Publish and Subscribe APIs in Qt for Symbian to Using Publish and Subscribe APIs in Qt
2011-04-01T14:38:12Z
moved Using Publish and Subscribe APIs in Qt for Symbian to Using Publish and Subscribe APIs in Qt

		
		← Older revision
		Revision as of 14:38, 1 April 2011
		


Kiran10182: Qt -> Qt Mobility
2011-04-01T14:38:01Z
Qt -> Qt Mobility

			
			
			
			
		
		← Older revision
		Revision as of 14:38, 1 April 2011
		
Line 1:
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  + [[Category:Qt Mobility]]
  {{CodeSnippet   {{CodeSnippet
  |id=...   |id=...
  |platform=S60 3rd Edition, FP1, FP2<br>S60 5th Edition   |platform=S60 3rd Edition, FP1, FP2<br>S60 5th Edition
  |devices= Nokia 5800 XpressMusic, Nokia N97   |devices= Nokia 5800 XpressMusic, Nokia N97
− |category=Qt for Symbian + |category=Qt
  |subcategory= Qt Mobility API   |subcategory= Qt Mobility API
  |creationdate=March 25, 2010   |creationdate=March 25, 2010
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  ==Overview==   ==Overview==
    
− This code example shows how to publish and subscribe content in Qt for symbian. A common use of this API is to communicate between two applications. Sharing data, that are in private folder, between two application is not possible without Allfiles capability in symbian, so publish and subscribe API is useful in that case. This code example shows how to use QtMobility Publish and Subscribe APIs to communicate between two applications. + This code example shows how to publish and subscribe content in [[Qt]]. A common use of this API is to communicate between two applications. Sharing data, that are in private folder, between two application is not possible without Allfiles capability in symbian, so publish and subscribe API is useful in that case. This code example shows how to use QtMobility Publish and Subscribe APIs to communicate between two applications.
    
  This snippet does not require any capabilities. Self-signing is possible for testing application.   This snippet does not require any capabilities. Self-signing is possible for testing application.
    
  ==Prerequisite==   ==Prerequisite==
−  
− * Install Qt for Symbian:[[Installing Qt on Symbian]]  
  * Install QtMobility APIs:[[Setting up environment for Qt Mobility API]]   * Install QtMobility APIs:[[Setting up environment for Qt Mobility API]]
  	   	
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  * Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.   * Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.
    
− [[Category:Qt]][[Category:Qt for Symbian]][[Category:Code Examples]] + [[Category:Code Examples]]




Yashu at 18:26, 31 March 2010
2010-03-31T18:26:53Z


			
			
			
			
		
		← Older revision
		Revision as of 18:26, 31 March 2010
		
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  }}   }}
    
− {{UnderConstruction}}  
    
  ==Overview==   ==Overview==
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  To test this code example, install both application, Publisher and Subscriber, on device. Type anything in editor of Publisher and push "publish name" button which publish data. After that switch to Subscriber, published value will be reflected there.   To test this code example, install both application, Publisher and Subscriber, on device. Type anything in editor of Publisher and push "publish name" button which publish data. After that switch to Subscriber, published value will be reflected there.
    
− ==Postconditions== + ==Post-conditions==
    
  The code snippet is expected to publish value using publisher application and subscribe value using subscriber application.   The code snippet is expected to publish value using publisher application and subscribe value using subscriber application.
    
  + <table>
  + <tr>
  +     <td align="left">
  + '''Publisher application'''<br>                    
  [[Image:QtPub_Sub_SC1.jpg]]   [[Image:QtPub_Sub_SC1.jpg]]
−   +    </td>
  +     <td align="left">
  + '''Subscriber application'''<br>                    
  [[Image:QtPub_Sub_SC2.jpg]]   [[Image:QtPub_Sub_SC2.jpg]]
−   +    </td>
  +   </tr>
  + </table>
  ==Download Code Example==   ==Download Code Example==
    




Yashu: Publish and subsribe API in Qt for Symbian
2010-03-25T19:39:25Z
Publish and subsribe API in Qt for Symbian
New page
{{CodeSnippet

|id=...

|platform=S60 3rd Edition, FP1, FP2<br>S60 5th Edition

|devices= Nokia 5800 XpressMusic, Nokia N97

|category=Qt for Symbian

|subcategory= Qt Mobility API

|creationdate=March 25, 2010

|keywords= QValueSpacePublisher, QValueSpaceSubscriber, QVariant, QPushButton, QLineEdit, QLabel

}}



{{UnderConstruction}}



==Overview==



This code example shows how to publish and subscribe content in Qt for symbian. A common use of this API is to communicate between two applications. Sharing data, that are in private folder, between two application is not possible without Allfiles capability in symbian, so publish and subscribe API is useful in that case. This code example shows how to use QtMobility Publish and Subscribe APIs to communicate between two applications.



This snippet does not require any capabilities. Self-signing is possible for testing application.



==Prerequisite==



* Install Qt for Symbian:[[Installing Qt on Symbian]]

* Install QtMobility APIs:[[Setting up environment for Qt Mobility API]]

	

==Headers required==

<code cpp>

#include <qvaluespacesubscriber.h>

#include <qvaluespacepublisher.h>

</code>



== .qcrml file==

Create a .qcrml file (here myPublisher.qcrml) in your publisher application and deploy it in c:/resource/qt/crml directory. Note that the '''uidValue''' in .qcrml file must be the same as UID of application that suppose to publish content.



<code cpp>

<?xml version="1.0" encoding="UTF-8"?>

<repository target="RProperty" version="" uidName="repo" uidValue="0xE0633550">

<key ref="/mypublisher/name" int="0x1"/>

</repository>

</code>



== .pro file==

Modify your .pro file of publisher application.



<code cpp>

CONFIG += mobility

MOBILITY = publishsubscribe



INCLUDEPATH += D:/QtMobility/src/publishsubscribe

DEPENDPATH += D:/QtMobility/src/publishsubscribe

INCLUDEPATH += D:/QtMobility/src/global



symbian {

        myCrml.sources = myPublisher.qcrml

        myCrml.path = c:/resource/qt/crml

        DEPLOYMENT += myCrml

    }

</code>





Modify your .pro file of subscriber application.



<code cpp>

INCLUDEPATH += D:/QtMobility/src/publishsubscribe

DEPENDPATH += D:/QtMobility/src/publishsubscribe

INCLUDEPATH += D:/QtMobility/src/global



CONFIG += mobility

MOBILITY = publishsubscribe

</code>





==Header file==

'''Publisher.h'''

<code cpp>



#ifndef PUBLISHER_H

#define PUBLISHER_H



#include <QtGui/QMainWindow>



#include <qmobilityglobal.h>

#include <QDialog>



QTM_BEGIN_NAMESPACE

class QValueSpacePublisher;

QTM_END_NAMESPACE



QTM_USE_NAMESPACE



class QLabel;

class QLineEdit;

class QPushButton;



//class Publisher : public QMainWindow

class Publisher : public QWidget

{

    Q_OBJECT



public:

	Publisher(QWidget *parent = 0);

    ~Publisher();

    

private:

    void initialiseLayout();

	void resizeEvent (QResizeEvent* event);

	void setWidgetGeometry(QSize* screenSize);

    

private slots:

    void publishValue();



private:

	QLabel        *labelName;

	QLineEdit     *inputName;

	QPushButton   *saveButton;

	QPushButton   *exitButton;

	QValueSpacePublisher *publisher;

};



#endif // PUBLISHER_H

	

</code>



'''Subscriber.h'''

<code cpp>

#ifndef SUBSCRIBER_H

#define SUBSCRIBER_H



#include <QWidget>

#include <qmobilityglobal.h>





QTM_BEGIN_NAMESPACE

class QValueSpaceSubscriber;

QTM_END_NAMESPACE



QTM_USE_NAMESPACE



class QLabel;

class QLineEdit;

class QPushButton;



class Subscriber : public QWidget

{

    Q_OBJECT



public:

	Subscriber(QWidget *parent = 0);

    ~Subscriber();



	

private:

    void initialiseLayout();

    void setSubscriber();

	void resizeEvent (QResizeEvent* event);

	void setWidgetGeometry(QSize* screenSize);

    

private slots:

    void getChangedValue();



private:

	QLabel        *labelName;

	QLineEdit     *inputName;

	QPushButton   *saveButton;

	QPushButton   *exitButton;

	QValueSpaceSubscriber *subscriber;

};



#endif // SUBSCRIBER_H



</code>





==Source file==



'''Publisher.cpp'''



Publisher publish value using QValueSpacePublisher variable that can be subscribed by one or more subscriber.



<code cpp>



#include "Publisher.h"

#include <qvaluespacepublisher.h>

#include <QLabel>

#include <QLineEdit>

#include <QPushButton>

#include <QResizeEvent>

#include <QVariant>

#include <QMessageBox>



Publisher::Publisher(QWidget *parent)

    : QWidget(parent), publisher(0)

{

	setWindowTitle("Publisher");

	

	/*initialize GUI components */

	initialiseLayout();

}



void Publisher::initialiseLayout()

{

	labelName = new QLabel(tr("Name"),this);

	labelName->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

	

	inputName = new QLineEdit(this);

	inputName->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

	inputName->setText("Savaj");

	

	saveButton = new QPushButton(tr("Publish name"),this);

	exitButton = new QPushButton(tr("Exit"),this);

	exitButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

	

	setWidgetGeometry(&(size()));

	

	connect(saveButton, SIGNAL(clicked()), this, SLOT(publishValue()));

	connect(exitButton, SIGNAL(clicked()), this, SLOT(close()));

}



void Publisher::resizeEvent (QResizeEvent* event)

{

    QSize widgetSize = event->size();

    setWidgetGeometry(&widgetSize);

    QWidget::resizeEvent(event);

}



void Publisher::setWidgetGeometry(QSize* screenSize)

{

	resize(*screenSize);

	QRect rect(0,0,screenSize->width(), screenSize->height());

	

	int width = 110;

	int height = 50;

	int margin = 5;

	labelName->setGeometry(0,0,width,height);

	inputName->setGeometry(width + margin,0,(width * 2),height);

	exitButton->setGeometry(0,height + margin,width,height);

	saveButton->setGeometry(width + margin, height + margin ,(width * 2),height);

}



void Publisher::publishValue()

{

	if (!publisher)

	{

		/* Constructs a QValueSpacePublisher that publishes values under path /mypublisher*/

		publisher = new QValueSpacePublisher("/mypublisher", this);

	}

	

	/* Sets the value name on the publisher to data. */

	publisher->setValue("name", QVariant(inputName->text().toAscii()));

}



Publisher::~Publisher()

{

}

	

</code>



'''Subscriber.cpp'''



Subscriber subscribe data, using QValueSpaceSubscriber variable, that is published by publisher.



<code cpp>

#include "Subscriber.h"

#include <qvaluespacesubscriber.h>



#include <QLabel>

#include <QLineEdit>

#include <QPushButton>

#include <QResizeEvent>



Subscriber::Subscriber(QWidget *parent)

    : QWidget(parent), subscriber(0)

{

	setWindowTitle("Subscriber");

	

	/*initialize GUI components */

	initialiseLayout();

}



void Subscriber::initialiseLayout()

{

	labelName = new QLabel(tr("Name"),this);

	labelName->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

	

	

	inputName = new QLineEdit(this);

	inputName->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

	

	

	saveButton = new QPushButton(tr("Subscribe name"),this);

	

	exitButton = new QPushButton(tr("Exit"),this);

	exitButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

	

	

	setWidgetGeometry(&(size()));

	

	connect(saveButton, SIGNAL(clicked()), this, SLOT(getValue()));

	connect(exitButton, SIGNAL(clicked()), this, SLOT(close()));

	

	setSubscriber();

}



void Subscriber::resizeEvent (QResizeEvent* event)

{

    QSize widgetSize = event->size();

    setWidgetGeometry(&widgetSize);

    QWidget::resizeEvent(event);

}



void Subscriber::setWidgetGeometry(QSize* screenSize)

{

	resize(*screenSize);

	QRect rect(0,0,screenSize->width(), screenSize->height());

	

	int width = 110;

	int height = 50;

	int margin = 5;

	labelName->setGeometry(0,0,width,height);

	inputName->setGeometry(width + margin,0,(width * 2),height);

	exitButton->setGeometry(0,height + margin,width,height);

	saveButton->setGeometry(width + margin, height + margin ,(width * 2),height);

}



void Subscriber::setSubscriber()

{

	/* Constructs a QValueSpaceSubscriber with the specified parent that refers to path /mypublisher. */

	if(!subscriber)

		subscriber = new QValueSpaceSubscriber("/mypublisher",this);

	

	connect(subscriber, SIGNAL(contentsChanged()), this, SLOT(getChangedValue()));

}



void Subscriber::getChangedValue()

{



	/* Returns a list of sub-paths under the current path */

    QStringList subPaths = subscriber->subPaths();



    for (int i = 0; i < subPaths.count(); ++i) 

    {

		/*Returns the value of the subPath under this subscriber path */

        QVariant variant = subscriber->value(subPaths.at(i));

        inputName->setText(variant.toString());

    }

}



Subscriber::~Subscriber()

{

}



</code>



==How to test application ==



To test this code example, install both application, Publisher and Subscriber, on device. Type anything in editor of Publisher and push "publish name" button which publish data. After that switch to Subscriber, published value will be reflected there.



==Postconditions==



The code snippet is expected to publish value using publisher application and subscribe value using subscriber application.



[[Image:QtPub_Sub_SC1.jpg]]



[[Image:QtPub_Sub_SC2.jpg]]



==Download Code Example==



* Working [[Media:QtPublishSubscribe.zip|Code Example]] is available to download from here.



[[Category:Qt]][[Category:Qt for Symbian]][[Category:Code Examples]]

← Older revision		Revision as of 10:58, 13 June 2012
Line 380:		Line 380:
	* Working [[Media:QtPublishSubscribe.zip\|Code Example]] is available to download from here.		* Working [[Media:QtPublishSubscribe.zip\|Code Example]] is available to download from here.

−	[[Category:Code Examples]][[Category:MeeGo]] [[Category:Symbian]]	+	[[Category:Code Examples]][[Category:MeeGo Harmattan]] [[Category:Symbian]]

← Older revision		Revision as of 05:45, 15 February 2012
Line 380:		Line 380:
	* Working [[Media:QtPublishSubscribe.zip\|Code Example]] is available to download from here.		* Working [[Media:QtPublishSubscribe.zip\|Code Example]] is available to download from here.

−	[[Category:Code Examples]]	+	[[Category:Code Examples]][[Category:MeeGo]] [[Category:Symbian]]

Using Publish and Subscribe APIs in Qt - Revision history

Hamishwillee: Text replace - "" to ""

Hamishwillee: Text replace - "Category:MeeGo" to "Category:MeeGo Harmattan"

Hamishwillee: Hamishwillee - Addition to article of: Category:MeeGo Category:Symbian. (Add platform categories)

Hamishwillee: Hamishwillee - Bot change of template (Template:CodeSnippet) - now using Template:ArticleMetaData

Kiran10182: moved Using Publish and Subscribe APIs in Qt for Symbian to Using Publish and Subscribe APIs in Qt

Kiran10182: Qt -> Qt Mobility

Yashu at 18:26, 31 March 2010

Yashu: Publish and subsribe API in Qt for Symbian

Hamishwillee: Text replace - "`" to ""`