Dr. Dobb's Journal - June 2008 - (Page 35)

d06espen_p4ds 4/11/08 9:19 AM Page 35 that problems like dealing with users switching the view orientation from Portrait to Landscape mode, or dealing with different screen resolutions, goes away. This application has no special code for dealing with screens of different sizes or with the switching of view orientations— this is all handled automatically by Qt. Figure 4 shows the same application running in QVGA and VGA with different view orientations. • Visual Studio 2005 Standard Edition or better (Express edition cannot be used). • Windows CE SDK. • Windows CE emulator image or a Windows CE device. • Qt for Windows CE. The Windows CE SDK and emulator are part of the Windows Mobile 5.0 SDK available from Microsoft (www.microsoft.com/ downloads/details.aspx?familyid=83A52A F2-F524-4EC5-9155-717CBE5D25ED). If you already have a Windows CE device, you still need the SDK. Once you have gotten the four ingredients installed, you can build a native application. The easiest way to build a Qt application is with qmake, a makefile generator that reads a project file and outputs a makefile or project file for the specified platform and compiler. To start your first project, navigate into the demos or examples directory in Qt and have qmake generate a Visual Studio project file for you. For example, navigate to demos\textedit and run: qmake -tp vc Qt, Windows CE, and Visual Studio 2005 To create a native Windows CE application in Visual Studio 2005, you need four things: (a) (b) Figure 4: (a) Qt Image Viewer running in QVGA Portrait; (b) Qt Image Viewer running in VGA Landscape. and open the textedit.vcproj file generated. The Visual Studio project file (.vcproj) has everything set up from include paths to library paths, as well as deployment rules that describe the libraries and resources that should be uploaded to your emulator or device. It simply takes the press of F5 to automatically build, link, and sign the application; deploy to your device; and start the native application you have created. The really cool thing is that you don’t necessarily have to use Windows CE or even Visual Studio when you develop Windows CE apps. Because Qt is crossplatform, you can develop on any supported platform, then just compile for Windows CE using Visual Studio 2005 in the end. Even though Visual Studio 2005 makes embedded development pleasant, it is still faster to debug an application when it’s not running in an emulator or on a device. Indeed, I developed most of the Qt Image Viewer under Linux. DDJ June 2008 l www.ddj.com l Dr. Dobb’s Journal 35 http://www.microsoft.com/downloads/details.aspx?familyid=83A52AF2-F524-4EC5-9155717CBE5D25ED http://www.microsoft.com/downloads/details.aspx?familyid=83A52AF2-F524-4EC5-9155717CBE5D25ED http://www.microsoft.com/downloads/details.aspx?familyid=83A52AF2-F524-4EC5-9155717CBE5D25ED http://www.birdstep.com/database http://www.ddj.com

Table of Contents Feed for the Digital Edition of Dr. Dobb's Journal - June 2008

Dr. Dobb's Journal - June 2008 Contents Friday Night Fish Fry Alia Vox Developer Diaries There Must Be Contest Conversations Building a Test Harness for RTOS QT and Windows CE Software to Hardware Parallelization Performance Portable C++ Effective Concurrency The Agile Edge Swaine's Flames

Dr. Dobb's Journal - June 2008

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