Qt

Uses

• http://www.omgubuntu.co.uk/2013/03/unity-next-project-announced
• RStudio is written in the C++ programming language and uses the Qt framework for its graphical user interface. See http://en.wikipedia.org/wiki/RStudio, http://support.rstudio.org/help/discussions/suggestions/3154-rstudio-and-qt-5 and Linux platform or Windows platform.
• Qt is used in a lot of places. See some example in wikipedia. Some famous ones are Mathematica, DreamWorks, Google Earth, HP, KDE, Roku TV box, Samsung, Skype, Ubuntu, VirtualBox, VLC, Volvo, etc. I guess 'Glucore Omics Explorer' was also made from Qt; see here.
• 10 Qt use cases “we” didn’t know

Download of 4.x and 5.x version

http://download.qt-project.org/official_releases/

For example, the source code for 5.0.1 can be downloaded from http://download.qt-project.org/official_releases/qt/5.0/5.0.1/single/

How to distribute Qt application

In my first example of GUI with button & label, I need to put 7 dll files in the same exe directory.

• icudt49.dll (17MB)
• icuin49.dll (1.3MB)
• icuuc49.dll (1MB)
• Qt5Cored.dll (7MB)
• Qt5Guid.dll (5.5MB)
• Qt5Widgets.dll (4MB)
• Qt5Widgetsd.dll (7.5MB)

Google: how to reploy application on windows, how to build qt contains all dll static on windows

• http://qt-project.org/wiki/Build_Standalone_Qt_Application_for_Windows
• http://qt-project.org/doc/qt-4.8/deployment-windows.html
• http://qt-project.org/wiki/How_to_build_a_static_Qt_version_for_Windows_with_gcc
• http://stackoverflow.com/questions/15153910/qt-build-to-a-single-exe-file-without-dlls
• http://yjyao.com/2011/02/how-to-deploy-your-qt-application.html

How to Build static Qt on Windows

• http://www.qtcentre.org/wiki/index.php?title=Building_static_Qt_on_Windows
• http://stackoverflow.com/questions/14932315/how-to-compile-qt-5-0-1-static-or-dynamic-on-vs2010-or-vs2012-express-under-wind
• http://stackoverflow.com/questions/14870272/qt-error-while-compiling-qt-5-0-1-on-windows-visual-studio-2010-vs2010
• Google: Qt 5.0 windows build static visual studio 2010 QMAKESPEC
• I can only succeed running configure command from Qt 4.8.4. See also http://qt-project.org/doc/qt-4.8/install-win.html.

My experience based on Qt 5.0.2

• read ReadME file to download perl, python and ruby. Make sure the executable path in in PATH env variable.
• OpenGL requirement: DirectX SDK The 6/7/2010 version is about 572MB. This will be installed to C:\Program Files (x86)\Microsoft DirectX SDK(June 2010) directory.
• modify mkspecs by searching qmake.conf. It was found in C:\Qt\qt-everwhere-opensource-src-5.0.2\qtbase\mkspecs\win32-msvc2010
• configure -static -release -platform win32-msvc2010 -opengl desktop

Qt Creator

• Multiple version of Qt library

Qt Tutorial

• http://qt-project.org/doc/qt-4.8/tutorials.html
• http://www.zetcode.com/gui/qt4/ This website contains tutorials of GUI programming by many different languages.
• Examples from codeprogress.com

• Qt 5 OpenGL https://www.youtube.com/watch?v=GYa5DLV6ADQ&list=PLizsthdRd0YzA1a8iIRT-c3YPnT5v3Zxw
• 106 Qt programming videos on youtube from VoidRealms
• Qt mouse even on QLabel by Saeed Ghoassy OR http://www.codeprogress.com/cpp/libraries/qt/qtClasses.php?item=QMouseEvent
• Qt C++ drawing mouse event by redbear8174
• Qt + histogram, scatterplot, contour plot,... by -http://qwt.sourceforge.net/ Qwt] See forum
• Forum about heatmap http://www.qtcentre.org/threads/45776-Using-Qt-to-display-a-interactive-heatmap

Qt Basic

• Frame (seems to be the same as 'Dock' in Qt's language)
• Dock window/Dock Widget http://qt-project.org/doc/qt-4.8/mainwindows-dockwidgets.html
• Use -> to dereference a pointer. The label below is a pointer rather than an object but *label is an object.

QLabel *label = new QLabel("ABCDE");
label->show();
// (*label).show();

• Use :: to call a function from some class. For example,

QObject::connect();

means to use connect() function from QObject class.

• 'namespace Ui' in xxxx.h helps to glue classes together.
• Qt widget - Basic widgets, Advanced widgets, Organizer widgets and Abstract widigets.
• Qt class hierarchy diagram http://doc.qt.digia.com/extras/qt43-class-chart.pdf