Nokia Developer Community - Discussions - Qt

Qt translation issue

madhavnarain — Tue, 14 May 2013 07:15:24 GMT

Hello,

In my Qt app there are lots of strings that needs to be translated. I have generated ts files for diff languages and my app works fine for globalization.

My issue:
Strings are scattered in my code.. so I want to dump all the strings in a single file(may be .h file), then use that in my cpp.

-thanks.

How to detect silence in QAudioInput?

vinnitu2 — Thu, 09 May 2013 07:36:45 GMT

I have idea to use google voice recognize api. And can do it with hand controlled start/stop record procedure. But I think best idea is detect silence to automatically start/stop record.

I know how to record audio. I know how to detect volume level in audio input. (SDK has such examples). But question is - is it possible get raw data from audio source (microphone) and record audio file in parallel mode?

Thanks for any help.

How to use so-called "voice key" in own application?

vinnitu2 — Thu, 09 May 2013 07:35:12 GMT

I found examples with KeyVolumeUp\Down and CameraKey but no with "Voice Commands" Key.

I wanna use this key to voice record while press and hold...

Any ideas?

Enabling t9 support in qwebview

daljit97 — Sat, 04 May 2013 13:15:06 GMT

Hello, I’m testing qtwebkit on symbian and I am really frustrated about that predictive text isn’t supported by default. How can I resolve this problem, thank you very much.

module "com.nokia.symbian" is not installed

Vivin — Sat, 04 May 2013 06:03:20 GMT

Ok guys I am Lab Rat:p

I am trying to develop an Matrimony manager for N8 based on Qt Quick.

Its running fine in Symbian Simulator and my Dad's N8 but
the Problem is when try to run in Qt_4_8_1_for_Desktop

file:///C:/QtSDK/QtCreator/bin/WorkSpace/ConnectingAlliance-build-desktop-Qt_4_8_1_for_Desktop_-_MinGW__Qt_SDK__Debug/qml/ConnectingAlliance/main.qml:2:1: module "com.nokia.symbian" is not installed
import com.nokia.symbian 1.1
^

com.nokia.symbian is imported already!:confused:

So
I built it for Qt_4_7_4_for_Desktop and its running good.

C:\QtSDK\QtCreator\bin\WorkSpace\ConnectingAlliance-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Release\release\ConnectingAlliance.exe exited with code 0

So guys can anyone give me a little hand on this?

Problem: NonSatellitePositioningMethods with TOO LARGE updateIntervalls

Summer_time — Fri, 03 May 2013 15:22:26 GMT

Hi,
I would like to use NonSattelitePositioningMethods to provide the alternative geo positioning indoor. I made an simple application just with a usage of NonSattelitePositioningMethods, to test the accuracy and first set updateInterval to 10 sek. BUT the updateInterval while testing is too large! I got no timeouts, everything working well but the updatetimes are not wokring as expected!
I use use QT 4.6.3 and QTMobility 1.0.2. Here are some Parts of my code:

Code:

//initial infosource call once in the beginning

void LocationManager::initCell(){

     sourceCell = QGeoPositionInfoSource::createDefaultSource(this);

            if (sourceCell) {

                    sourceCell->setPreferredPositioningMethods(QGeoPositionInfoSource::NonSatellitePositioningMethods);

                    sourceCell->setUpdateInterval(10000);

                    startcell();

            }

} 

//enable cellpositioning when needed

void LocationManager::startcell(){

    if(!sourceCell){

        initCell();

        connect(sourceCell, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));

        connect(sourceCell, SIGNAL(updateTimeout()), SLOT(onPositionTimeoutCELL()));

        sourceCell->startUpdates();

    }else{

        connect(sourceCell, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));

        connect(sourceCell, SIGNAL(updateTimeout()), SLOT(onPositionTimeoutCELL()));

        sourceCell->startUpdates();

    }

}



//disable cell if needed....

void LocationManager::cellOff(){

    sourceCell->stopUpdates();

    disconnect(sourceCell, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));

    disconnect(sourceCell, SIGNAL(updateTimeout()),this, SLOT(onPositionTimeout()));

}



//timeout

void LocationManager::onPositionTimeoutCELL(){

   

qDebug()<<"cellupdate timeout";

    if(sourceCell){

        cellOff();

    }

  ....

}

//my positionupdate slot:

void LocationManager::positionUpdated(const QGeoPositionInfo &info) {

    if (info.isValid())

       {

           QGeoCoordinate geoCoordinate = info.coordinate();

           latGPS = geoCoordinate.latitude();

           longGPS = geoCoordinate.longitude();

           altGPS = geoCoordinate.altitude();

           accGPS = info.attribute(info.HorizontalAccuracy);

           timeGPS = info.timestamp().toLocalTime().toString();



           qDebug()<<"timeGPS:"+timeGPS;



       } 

}

Here is the output of that time when positionUpdated(const QGeoPositionInfo &info) slot is called (in format:hh:mm:ss). First you see the approx. device time, and as second "timeGPS" from positionUpdated slot :

Code:

...

QDateTime::currentDateTime():  15:54:49     timeGPS: 13:54:44  

QDateTime::currentDateTime():  15:57:49     timeGPS: 13:54:44

QDateTime::currentDateTime():  16:00:49     timeGPS: 14:00:45

QDateTime::currentDateTime():  16:03:49     timeGPS: 14:00:45

QDateTime::currentDateTime():  16:06:49     timeGPS: 14:06:45

QDateTime::currentDateTime():  16:09:49     timeGPS: 14:06:45

.......

SO from this output a can see i have updateintervals every 3 minutes on my device, so every 3 minutes positionUpdated is emited, but the timestamp of infosource shows that in reality coordinates are updated just every 6 minutes, and i would think if the coordinates are really still same, its not so bad. But its anyway too LONG!

I just would like to understand where coming this 3 and 6 minutes from?
And Why my setting of setupdateInterval of 10 sek(10000ms) are not working at all?
I just cant find any explanation on my own, so i need help.

Thank you in advance!

Change/replace widgets in layout

strelamcqueen — Wed, 01 May 2013 13:18:22 GMT

Hello,

it is a basic question but don't know the solution. I'm not an expert in programming so I use a single screen (whole app in one screen). Some of my apps require dialog boxes or privacy messages that contain more text so I have to use e.g. QTextBrowser to display the text.

My problem is changing the widgets in one layout. If I have a layout that contains a button, a label and a slider and want to display a QTextBrowser, I probably have to remove all other three widgets and add a new one, right? Is this reasonable and does not do any illegal calls/use ? My code works but not reliably (especially when changing the layout back to the original one). I've been googling but cannot get a clear answer how to do that.
I'm using QtSDK, C++, no QML.

Thank you.

Invalid qt version in qtcreator

babylongreece — Tue, 30 Apr 2013 16:04:22 GMT

Hello,
I just use qt creator for harmattan few days ago and it is working fine but when i install another qt sdk in a same computer but different users account,the harmattan target is no longer working with error "invalid qt version" as shown below.

I already deleted the computer new user account and reinstall the qt sdk (offline installer) in my original users account back and it is still no working.I even already uninstall first then shutdown computer to clear any cache and reinstall with "remove old qt creator setting" checked and yet it is still the same error.It used to work fine but now it no longer work.What should i do.I already uninstall and reinstall at least five times.It used to work fine.

Qml BatteryInfo.currentFlow() Problem

Motaz New — Fri, 26 Apr 2013 22:12:56 GMT

Hello, I have a strange problem, When I run my program for the first time I get a result from BatteryInfo.currentFlow(), but if I close it and run it again, I don't get a result and when I runs it for a third time I get a result, and so on...

(I test my program on Nokia 500, Nokia 700 and I get same problem)

Question, how to avoid Starting (no GUI) Qt Application multiple times?

Summer_time — Thu, 25 Apr 2013 12:50:10 GMT

Hi ,
I develop a NON-GUI Qt application for NOkia C05-00 (s60 3-rd Ed FP2 ).
When i start application onces, its running. When i second time press on app-icon(or open it with an "options"-softbutton), a guess, new "instance" of application starts.
I'm not sure, I just notice that my aplication transmitts data to server twice every 10 seconds, but it has to do it just once every 10 seconds.
May be its stupid question but, I'm confused: Is it normal behavior, that two or more instances of the same application can run parallel?

And how can i avoid starting applicaiton multiple times?

Thank you in advance,

Need to stop QML Audio from cpp code

srav219 — Thu, 25 Apr 2013 05:15:06 GMT

Hi,
I have a qml which has audio playing.I need to pause the audio from QAPPlication ie cpp code.
*
QML CODE is as follows
***********************************************************
import Qt 4.7
import QtMultimediaKit 1.1

Text { text: “Click Me!”; font.pointSize: 24; width: 150; height: 50; Audio { id: playMusic source: “music.wav” } MouseArea { id: playArea anchors.fill: parent onPressed: { playMusic.play() } } } ************************************************************ When i hide my qml app ,I need to pause the audio playing. This is straight forward pausing in qml file by using signals and slots I need to pause the audio from cpp code .
The scenario is
When i get an incoming call , I should pause the media which is playing .
I want in Qt app context to pause the media.I dont want QML do the pausing of the media
Please post me if you people have anything