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- - How to run a sh script from QML button? (https://talk.maemo.org/showthread.php?t=87580)

flotron

2012-10-25 22:42

How to run a sh script from QML button?

Hi i'm beginning with QML and i would like to know how i execute a script.sh with a QML button.

I have the script.sh:

Code:

#!/bin/sh



gconftool -s --type=string /meegotouch/theme/name blood

/sbin/initctl restart xsession/mthome

exit 0

And i have the QML:

Code:

    ToolButton {

        id: myButton

        x: 121

        y: 410

        width: 119

        height: 62

        onClicked: {

            HERE I WANT TO EXECUTE THE SCRIPT

        }

    }

}

Is it possible?
I must package the sh file with QT or i must write the sh script inside QML?

marxian

2012-10-25 23:19

Re: How to run a sh script from QML button?

You can't do it purely in QML. You would need to write a simple class in Qt that uses QProcess to launch the script.

scriptlauncher.h

Code:

#ifndef SCRIPTLAUNCHER_H

#define SCRIPTLAUNCHER_H



#include <QObject>

#include <QProcess>



class ScriptLauncher : public QObject

{



    Q_OBJECT



public:

    explicit ScriptLauncher(QObject *parent = 0);

    Q_INVOKABLE void launchScript();



private:

    QProcess *m_process;

};



#endif

scriptlauncher.cpp

Code:

#include "scriptlauncher.h"



ScriptLauncher::ScriptLauncher(QObject *parent) :

    QObject(parent),

    m_process(new QProcess(this))

{

}



void ScriptLauncher::launchScript()

{

    m_process->start("sh script.sh");

}

In the main.cpp file, get a pointer to the QDeclarativeContext object and register the ScriptLauncher as a context property:

Code:

#include "scriptlauncher.h"



...



ScriptLauncher launcher;

QDeclarativeContext *context = view->rootContext();

context->setContextProperty("scriptLauncher", &launcher);

The ScriptLauncher object is now accessible in QML as scriptLauncher:

Code:

ToolButton {

        id: myButton

        x: 121

        y: 410

        width: 119

        height: 62

        onClicked: scriptLauncher.launchScript()

}

I should also mention that you can use GConf in Qt directly. So, instead of using QProcess to launch a script, you could write a simple class that sets the GConf variable. This would be a better approach.

EDIT: Here's a nice example of using GConf in Qt/QML: http://harmattan-dev.nokia.com/docs/..._to_GConf.html

flotron

2012-10-25 23:47

Re: How to run a sh script from QML button?

Wow i thought that QML was more complete :)

Thank you marxian, i'm going to try what happens

EIPI	2012-10-26 00:18

Re: How to run a sh script from QML button?

And this is just what I was looking to do with my next app! Will try it out!

flotron

2012-10-26 00:22

Re: How to run a sh script from QML button?

i'm stuck with this errors:

main.cpp: In function 'int main(int, char**)':
main.cpp:16: error: 'view' was not declared in this scope

This is my main.cpp

Code:

#include <QtGui/QApplication>

#include "qmlapplicationviewer.h"

#include "scriptlauncher.h"

#include "qdeclarativecontext.h"



Q_DECL_EXPORT int main(int argc, char *argv[])

{

    QScopedPointer<QApplication> app(createApplication(argc, argv));



    QmlApplicationViewer viewer;

    viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);

    viewer.setMainQmlFile(QLatin1String("qml/untitled/main.qml"));

    viewer.showExpanded();



    ScriptLauncher launcher;

    QDeclarativeContext *context = view->rootContext();

    context->setContextProperty("scriptLauncher", &launcher);



    return app->exec();

}

marxian

2012-10-26 00:36

Re: How to run a sh script from QML button?

Quote:

Originally Posted by flotron (Post 1285613)

i'm stuck with this errors:

main.cpp: In function 'int main(int, char**)':
main.cpp:16: error: 'view' was not declared in this scope

This is my main.cpp

Code:

#include <QtGui/QApplication>

#include "qmlapplicationviewer.h"

#include "scriptlauncher.h"

#include "qdeclarativecontext.h"



Q_DECL_EXPORT int main(int argc, char *argv[])

{

    QScopedPointer<QApplication> app(createApplication(argc, argv));



    QmlApplicationViewer viewer;

    viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);

    viewer.setMainQmlFile(QLatin1String("qml/untitled/main.qml"));

    viewer.showExpanded();



    ScriptLauncher launcher;

    QDeclarativeContext *context = view->rootContext();

    context->setContextProperty("scriptLauncher", &launcher);



    return app->exec();

}

'view' is the QDeclarativeView/QmlApplicationViewer, so in your case, it needs to be 'viewer.rootContext()' instead of 'view->rootContext()'.

flotron

2012-10-26 02:18

Re: How to run a sh script from QML button?

Ok! no errors.

Now, where i place the "script.sh" file? under QML "Other files"?

And then it executes with "onClicked: scriptLauncher.launchScript()"?
or i must add for ex: "onClicked: scriptLauncher.launchScript(/opt/something/string.sh)"?

sixwheeledbeast

2012-10-26 06:40

Re: How to run a sh script from QML button?

Quote:

Originally Posted by flotron (Post 1285630)

I would add a folder called script to the package and put your script in there. You will need to add this to the package in .pro file.

AFAIU the m_procces location is done in the slot (were "sh script.sh" is in Marxian's example)
This is were you need to put "sh /opt/mypackage/script/myscript.sh"
onClicked can be left alone.

flotron

2012-10-26 16:08

Re: How to run a sh script from QML button?

i added the script folder with script.sh inside but (with right click to project, add existing file) when i install i explore the opt folder on phone and i only see "bin" and "qml" folders.

This is the pro file:
OTHER_FILES += \
qtc_packaging/debian_harmattan/rules \
qtc_packaging/debian_harmattan/README \
qtc_packaging/debian_harmattan/manifest.aegis \
qtc_packaging/debian_harmattan/copyright \
qtc_packaging/debian_harmattan/control \
qtc_packaging/debian_harmattan/compat \
qtc_packaging/debian_harmattan/changelog \
script/script.sh

marxian

2012-10-26 16:36

Re: How to run a sh script from QML button?

Quote:

Originally Posted by flotron (Post 1285927)

In your .pro file, you need something like this:

Code:

script.path = /opt/<application_name>/script

script.files += script/script.sh



INSTALLS += script

The example assumes that the script folder is a direct subfolder of your main project folder. In the ScriptLauncher, you set the command to "sh /opt/<application_name>/script/script.sh", or you could change the launchScript() method to take a QString argument, and you would then be able to launch different scripts from QML (there is also the option of subclassing QProcess and exposing its methods/properties to QML, which would ultimately be more flexible).

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