backbone-min.map 404 (Not Found)

Hi, I recently started to play around with some web development. I got assigned to a project that was already in development. In the Chrome console (devTools) there was an error:

GET http://localhost/js/libs/backbone/backbone-min.map 404 (Not Found)

As you can see my problem is with the backbone, but it doesn't matter. It can be problem with jQuerry, or any other library. If you are interested how to remove this error read more.

WindowsPhone - Add image to project

In this tutorial I will explain how to create a new Windows Phone project using Visual Studio Express. I will also show how to add few images to the project. We will position and re size them. We will also explore XAML and its syntax.

Qt Speed Gauge Tutorial 3 - Adding GPS

This is part 3 of my SpeedGauge ttuorial. In this part we will add GPS capability, we will explain what is PositionSource element and we will introduce some new JavaScript Math functions. Also in this tutorial you are able to download the source code for Symbian^3 and for MeeGo phones.  Hope you enjoy it.

List of my Symbian MeeGo Qt tutorials

I have decided to write a list of my tutorials for Qt for MeeGo and Symbian^3 phones. This way everything will be in one place I will update this list when I create more tutorials so you can maybe add the page to your favorites. Hit Read more to see the list

Qt Speed Gauge Tutorial 2

Hi, Here is the part 2 of our Qt SpeedGauge tutorial. In this  tutorial we will fix few things we didn't make it in our last one. We will remove ToolBar, add stops so that the needle doesn't go all the way around and we will add Spring animation to the Needle movement. This will result in a wobbly movement of needle. Also We will prevent the screen rotation. During programming I have also stumbled on an error message Cannot open output file Permission denied and collect2: Id returned 1 exit status. You can find out how I handled the situation. If I got your attention read on.

Qt SpeedGauge Tutorial 1

As I promised here is the first part of the SpeedGauge tutorial. This will be a series of tutorials. By the end of series you should know how to create an app that uses GPS of your Symbian and MeeGo Phone. As before we will use Qt Quick, QML and JavaScript for this. Firstly we will create the app for Symbian^3 phones and then we will adjust the app so it will work on MeeGo. It will need only minor adjustments.

Speed Gauge tutorial

Hi all,
New version of my app is out. SpeedGauge is now v1.2 and is available for Symbian and MeeGo. Along with it you have tutorial explaining how to develop app like that for Symbian^3 and MeeGo using Qt QML. By buying this app you will support all the tutorials I have written so far. Both versions are available for download on Ovi Store. Here is version for Symbian^3 phones and here is MeeGo Version of SpeedGauge. So stay tuned! Click on read more to find out about the app and the tutorials.

Change default icon in Qt for Symbian

So you have finally completed your application for Symbian phones using Qt. Congrats. But when you install the app on your phone you get the default icon. You are wondering "How do I change the icon of my app?". If you don't change it you will be stuck with the default green icon with letters Qt. I have also enclosed the two icons in  SVG-Tiny format for you to download and play around. In this post you will also find a link to advices from Nokia on how to create the icons for Symbian, MeeGo and their other platforms.

plugin cannot be loaded for module Cannot load library The specified module could not be found.

Hi, recently I had problems with a similar error from the title of this post.  The complete error is here:
plugin cannot be loaded for module "QtMobility.sensors": Cannot load library C:/QtSDK/Simulator/Qt/mingw/imports/QtMobility/sensors/declarative_sensorsd.dll: The specified module could not be found.
     import QtMobility.sensors 1.1 
Your error can be a little bit different from this. The text colored green can be different from the one you see. It all depends what resource you are trying to access in your code. Here is another example of the problem number 2:

plugin cannot be loaded for module "QtMobility.location": Cannot load library C:/QtSDK/Simulator/Qt/mingw/imports/QtMobility/location/declarative_locationd.dll: The specified module could not be found.
     import QtMobility.location 1.2  

Another one of these errors can look like this- problem number 3:
plugin cannot be loaded for module "QtMobility.systeminfo": Cannot load library C:/QtSDK/Simulator/Qt/mingw/imports/QtMobility/systeminfo/declarative_systeminfod.dll: The specified module could not be found.
     import QtMobility.systeminfo 1.2 

At the end of this article you will solution for these and similar errors.
If you still haven't figured it out this is one of those Qt Quick tutorials. You will need Qt SDK used to program for Nokia phones, Windows, Linux and few other platforms in order to see this error. I am using Qt SDK 1.2. For a solution, continue reading this post

How to download and install Qt SDK 1.2

I have created new video for the YouTube showing you how to download and install Qt SDK 1.2 from scratch. The video is for installing on Windows 7 but if you are using Linux of Mac OS the process is the same so the video is is still worth looking.

Qt SDK is cross platform framework for creating applications. You can create apps for Windows, Linux, Mac OS but this blog focuses on apps for Symbian and MeeGo phones. Read more about Qt on Wikipedia.

Firstly you should download the installation file. You can get it:
http://www.developer.nokia.com/Develop/Qt/Tools/
just hit the blue button Download Qt SDK.

Upgrade Qt SDK 1.1.4 to Qt SDK 1.2

I have created video on how to upgrade Qt SDK 1.1.4 to Qt SDK 1.2 released 1st of February 2012. You can use this method even if you have older version of Qt SDK installed. You can check out what is new in this version in my previous post:
New Qt SDK 1.2 is available for downloa

You will know that update has completed successfully if your version after the update is Qt Creator 2.4.1 based on Qt 4.7.4. built on Jan 26 2012. To check wich version of Qt Creator you are using go toHelp > About Qt Creator.

Here goes the video. Maximize it and enjoy.

How to use Button from Qt Quick Components for Symbian

In this post I will present you two videos I have created. The videos are about a simple app for Symbian^3 phones. App consists of three buttons that change the color of the rectangle and the text of the Text element on the screen.
These videos will show you how to create a button and how to detect when it was pushed. You will also learn how to position elements on screen so they look good in different orientations and screen sizes. We are using Qt Quick components in this tutorial. In this article you will also find part of the source code for this project.

HelloWorld Qt App Explained part 2 of 2

While back I created video tutorial that explains code behind Hello World application for Symbian^3 phones. I am writing this post because I have decided to put the source code here. Maybe it will be convenient for someone to look at it. Only the modified files will be here.

In this video I have explained declarative part of the code inside QML file of the Qt Hello World app for Symbian^3 phones.
Covered in this episode:
- QML code explained


This post (and video featured in it) is 3nd part of 3 part whole. You should read 1st and 2nd article before reading this one.You can find them here:
Hello World for Symbian^3 with Qt Quick components done using Qt Creator
HelloWorld Qt App Explained part 1 of 2

HelloWorld Qt App Explained part 1 of 2

While back I have created a video which explains the code behind HelloWorld app for Nokia Symbian^3 phones.  I have decided to write a post about the video. In this post I will also provide the source code from the files covered in the video.

This post (and video featured in it) is 2nd part of 3 part whole. You should read first article before reading this one.You can find it here:
Hello World for Symbian^3 with Qt Quick components done using Qt Creator 

After you finished with this article you should watch part 3. You can find it here:
HelloWorld Qt App Explained part 2 of 2

In the video tutorial I will explain native code and project file of the Qt Hello World app for Symbian^3 phones.
Covered in this episode:
- project file explained: symbian:TARGET.CAPABILITY, CONFIG and SOURCES
- main.cpp file (also called native code): QApplication, QmlApplicationViewer
- using help

Hello World for Symbian^3 with Qt Quick components done using Qt Creator

Tutorial shows you how to get simple Hello world app for Symbian^3 using Qt SDK and how to run it in simulator. You will learn how to
1. create new project in Qt Creator
2. update Qt creator if there are updates available
3. save your project
4. solve QML module not found issue
5. build and run project in simulator


This code is tested on Symbian Anna and Belle phones. This code was written using QtSDK 1.4.4. and Qt Creator 2.4.0 Based on Qt 4.7.4 (32 bit) Built on Dec 16 2011 at 03:25:42. At the moment of writing this text it was latest version of QtSDK available. With newer versions of Qt the code will probably change and it will get updated. If the code changes the logic behind is will stay the same so this video will be of some use to you.