This article will teach you how to create an amazing, clean and smooth WPF/Winform UI for your native application without using any complex, unsafe, ActiveXish methods, etc.
In this article, you will build a Qt-based Python application with two C/C++-based DLL dependencies. This architecture mimics a typical scenario of using Python and Qt for rapid UI prototyping and DLLs for computation-intense work.
Property browsing is a common task and many standalone libraries already exist, but let's explore the built-in functionality in Qt library to handle this.
hi.i have program it has some classes.one of these classes inherites from QMainwindow.i write blew code to put QScrollArea in this code.i have two problem.1_ two windows open(main window of program with a empty window).2_ when main window is in minimum state,it shows horizontal and vertical...
Hi !I am writing a program in qt creator and at first when the program is runing I should enter username and password and it should check if the username or password exist in the file . but i dont know how to do it and how to check a file lines .could you tell me ?
Always try Google first. For example for username password entry:http://www.nkonecny.com/blog/2011/09/30/creating-a-user-login/[^]Basic file I/o is explained herehttp://www.learncpp.com/cpp-tutorial/136-basic-file-io/[^]You can start with the example and modify it to your...
Good evening, I have a problem when I load .so into QT project.firstly, I copy libexpat.so to the project folder.secondly, I add INCLUDEPATH += ../include/expat LIBS += -L -lexpat to .pro fileBut the application also reminds cannot find the libexpat's functions, I don't know why...
I am new to this stuff so need help in writing the unit test. GitHub - KDE/kpmcore: Library for managing partitions. Common code for KDE Partition Manager and other projects.[^] What I have tried: Since I am new, I am not sure how I should get started.
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on running the code in the link given below...gives an eror that Cannot open include file: 'satellitedialog.h': No such file or directory...why this error and how it can be removed..??http://doc.qt.nokia.com/qtmobility-1.0/weatherinfo.html[^]
PreetiJuneja wrote:gives an eror that Cannot open include file: 'satellitedialog.h': No such file or directoryThis simply means that there is a reference to 'satellitedialog.h' somewhere in your code. But the file said is missing.PreetiJuneja wrote:why this error and how it can be...
The problem is this : SoundEvent::SoundEvent() That is the implementation of the class' constructor. That appears to be the declaration of the class which should appear like this : class SoundEvent { public: SoundEvent( qint64 timestamp = 0,...
bonjour à tous, Je m'apprête à démarrer un petit projet , une application de gravure CD/DVD (c++/qt). Est ce que quelqu'un pourra m'indiquer les librairies C++ (Open Source / Compilation statique / multi-plateformes ) que je pourrai utiliser?(qui pourra être compiler en statique "CMAKE" si...
Hi alli've got this error:http://i.stack.imgur.com/Sdkcr.jpg[^] (my code) http://i.stack.imgur.com/LkQkn.jpg[^] (my error)why is it for?ANY idea will be appreciated.please tell me ANY idea you have.thanks.[edit]Links linkified - OriginalGriff[/edit]
You should link with the pthread (POSIX threads) library. The gcc command line option is -lpthread, check out your IDE documentation for the appropriate setting.
Hi all..I am GLSL beginner. I am using shader with Qt's OGL module.I have created a shader and have drawn an image on the QGLWidget but stuck about how to apply the shader to the image object.e.g. I have created a shader for brightness, but how to apply gl_fragcolor value to the...
I'm not sure what QT syntax is...But in general a GLSL is compiled and Attached to an object. In this case,1. create an object which will point to your shader program.2. look out for an attach() method. (may be like widget->attach(ShaderObject *)).In this way you can attach shader...
Please Hv a Look at my code and let me know how to use gl_FragColor Value while Updating the image in paintGL() Function.void GLWidget::initializeGL(){ //***************Shader for Brightness************************// QGLShader *vshader1 = new QGLShader(QGLShader::Vertex,...
here is the section of code which facing this problem..QString line = in.readLine(); QStringList fields = line.split(","); fields.replaceInStrings(" ", ""); QString IDstr = fields[0]; int slotDec = fields[1].toInt(&ok, 16); int...
normally means that exception that the list hasnt that size. Check it before any access. Is your input correct for your splitting?Plz learn to use a debugger.
You are assuming fields[1] exists, that is the QStringList contains at least two items. Such an assumption, according to the documentation[^], is wrong.
As per error message "Index out of range", if you are trying to access the outside the range of the index then you will get this type of error, in your code you are calling fields[1] if there is no field with that particular index then you will get this type of error.To resolve this type of...
I have multiple of usb sound card connected to my system and i want to record one certain signal for each sound card. How will I call the name of my USB sound card to work properly without having a dropdown list box on my gui. Direct assigning of sound card is what i am after. Thanks a...
The QAudioRecorder Class[^] provides the audioInputs() function returning a list of available names. If you don't want a list box to select from these but use hard coded names, just print the list once to know the names that can be used on your system.There is also the function...
my question is when i build release mode my simple app,how i can create exe file?i tested this solution: Let's say you've installed QT under c:\qtsdk Open your project, and compile it in release mode. Go to this directory: C:\QtSDK\Desktop\Qt\4.7.4\mingw\bin -- it contains...
I have the following prolem:After extracting qt-everywhere-opensource-src-4.8.5, when I configured it, I got the following message:Basic XLib functionality test failed! You might need to modify the include and library search paths by editing QMAKE_INCDIR_X11 and QMAKE_LIBDIR_X11 in...
How about installing the non dev packages first? What happens if you install the list of dependencies given in the list? It may also help a lot to use synaptic.If not installed: sudo apt-get install synapticGood luck!
I need to know about of an application or an idea for report bugs in my app, example.... AppReport... In language C++, better if is in Qt Framework, not Win2 MVC
Not exactly sure if this is what you are asking... but I'll give it a shot. For bug tracking and reporting I've been using Bugzilla[^] for a number of years and it works great. There are a number of large companies that use it and they are open source. I host the software on a Linux...
Good, but, i think more than, example an element in my code for explain more the bugs.... Example, when my app crash i want to throw a windows to send information about the crash, how Apport or KDE Crash Handler.....
Hi All, I have installed Qt 5.0.0 on my windows xp system.My target is to play video with videowidget example given with Qt 5.0. Its located at following path on my machine.C:\Qt\Qt5.0.0\5.0.0\msvc2010\examples\multimediawidgets\videowidgetWhen i execute example it could not...
If your Qt 5 sample application is not working then you have an issue with the installation of Qt. Make sure you already have a working VC2010 on your machine as this is what the sample seems to require. Qt usual has a "build all samples" project or script file that you need to run after...
I'd recommend creating a brand new project. The target for the project would be the DLL that you require. Add your existing source code files to the project and things should build. Someting to consider though is that typically EXEs and DLLs have different entry points and usually DLLs will...
Ah, same question from Quora, maybe same user from there too? :laugh:I answered this question on Quora in the following words: Afzaal Ahmad Zeeshan on Quora[^]:Qt... never will be used. But, as Qt claims it can create applications for every platform. You also are aware of Qt and can...
I am new in C++ 98 with QT-4 in netbeans 8.1 . I am trying to make data base connection using this code. #include "newForm.h" #include #include #include #include using namespace std; #include...
Auto commit mode means that as soon as a statement is executed, Commit is called on the connection. At a guess - and I have no access to your system for testing - the setSchema call throwing an error probably means that the DB name...
Hello everybody.In chapter 02 of "C++ GUI Programming with Qt4, 2nd edition" is an example which when I implemented, compiled and run it, give me an error about segmentation fault.I uploaded all the codes at : http://ubuntuone.com/1BwwCaFw9801KfL39I7cA6[^] (about 22 Kb)Thanks a lot of...
Hello every one how can i split an array into blocks.For example Given an array of size 4x4 divide the array by blocks of 2x2 and then the size of the array is 4x4 so there will be four blocks of 2x2. In this case block size is 2; Block 1 Block2 0 1 0 0 ...
How about: int block[4][4] = { { 0,1,0,0 }, { 1,1,1,0 }, { 0,0,0,0 }, { 1,1,0,0 } }; int block1[2][2]; int block2[2][2]; int block3[2][2]; int block4[2][2]; for (int i = 0; i
sorry,i didn't find qt zones,so i put my questions here,it was like this:i use qt4.5.3 and xerces-c-3.0.1 to read xml file,then when i save my files, a problem occurs,m³---change into m3;m² change into m2;my xml format is UTF-8, i searched many websites,and still don't get a...
I want to call c++ function "writeintocsvFile()" to write/append data into CSV file from QML. Would be nice if someone guide me how i can do this??What I have tried:method to call function from QML
Check this thread which seems to have a answer for a similar question.[solved] To call function in C++ from QML | Qt Forum[^]Also, check following article-Integrating QML and C++ | Qt QML 5.7[^]Hope, it helps :)
From main UI thread i am creating new thread(counterThread) and in new thread i am trying to accesss QfileDialog. it gives me error msg No matching function for call.void MainWindow::on_pushButton_clicked(){ //Start Counter Thread QThread* workerThread = new QThread; ...
This won't work in a Qt worker thread.From http://doc.qt.io/qt-5/thread-basics.html[^]:Quote:As mentioned, each program has one thread when it is started. This thread is called the "main thread" (also known as the "GUI thread" in Qt applications). The Qt GUI must run in this thread. All...
I have to create and initialise objects of a class called Device in my main program. But the number of objects created are based on the user input. The IDE is Qt so I have access to data structures like QLists. What I have tried: My idea was that in the header file I would declare a Device...
I am doing CAN first time using C++: I am using API function to initialize CAN. Function for API CAN intialization is as following/// /// Initializes a PCAN Channel/// /// "The handle of a PCAN Channel"/// "The...
I need a help.I need a function that when I open my option window, the main window of my program is out of use.Like when I open my computer then from tool>> folder option, than I cant access to my computer.
I have no experience with either Python or QT, but what you need is a modal window.Using Google[^] I found this http://www.commandprompt.com/community/pyqt/c6351[^].If this doesn't work for you will do your own Google search on how to create a modal window in Pyhton QT.
Hello everybody..I've a question about QGraphicsItem.I've casted a qml file to QGraphicsItem (by creating a object by engine). And it's OK . But when i add this QGraphicsItem into a scene and view and i set its flag to be movable nothing will do when i try to drag it.Here is the...
HiI coded a java class, now I need to change it to C++ code, but I am not expert in C++. Can any body change the code to C++ for me? Application: Log Analysis.Developing a new tool for analyising the log files.The given code for parse the log file(Extract the fields from the log...
Well, the program is actually pretty simple. You have only to verify that C++ regex[^] produces the same results the Java package does (or modify the pattern for proper matching). Probably all you need is a tutorial on using the C++ regex. Google is your friend[^].
hii am beginner in qti created a GUI application in qt creator and added a push button and a line edit into form by desginer. i want the size of (width and height) lineEdit change when i click push buttonbut when i write this code:void MainWindow::on_pushButton_clicked(){ ...
I have styled my QPushButton using stylesheet. Inside the border of the button and in the corners there are large areas that are not clickable . Using :hover I can see that Qt thinks the mouse is over the button but when I click, no clicked signal.I searched in net but not find any solution ti...
Dear developers,i have a C++ program which is written in QT, now the development stuff is done and it is compiled to be used inside windows but now i want to compile it for linux too.but the thing is i don't know how to do it :-(Note: I'm using QT 4.7.4 32 bit and mingw on windows 7.
Well... set up your compiler to and IDE onto your Linux machine (if you use an IDE). Now, you'll have to rebuild your Qt libraries for Linux, that should be in their documentation (although I have noticed their documentation kind of sucks). Once you have built the libraries, configure your IDE...
Hi,I am creating one shared library in Linux using Qt and C as programming language. When i compile my code it show me one error like thisexpected ‘)’ before...
Should be:void (CALLBACK *managedCallback1)(char **);void (CALLBACK *managedStopCallback)();The extra asterisk before the open parenthesis is incorrect.
Hi I am new in CPP. very confused between declaration and defination of function.here is my code file name: pcanlinkerclass.cpppCANLinkerClass::pCANLinkerClass(){ LoadAPI();}void pCANLinkerClass::LoadAPI(){ mypcanlinkerfunction(); qDebug()
There must be a method with the same name and signature in the pCANLinkerClass class declaration (usually in the header file), e.g.in pCANLinkerClass header fileclass pCANLinkerClass{//... void mypcanlinkerfunction();//...};
Quote:HI everyone recently I am working with FTP server in qt, and then I connected to FTP but in 30 second if I do not do anything with FTP like download or upload, connection is becoming disconnection. who can help me what should I do to solve this problem
Most FTP servers have a time out value for closing the connection when no requests are received. FTP clients usually have a keep-alive option to send a FTP command in defined intervals (e.g. the NOOP command). So you should implement something similar in your client.
i have a server of windows server 2003 and its IP on my local network is 192.168.1.220 this server has SOL server 2005 express edition installed with user name sa and password amirthis SQL server has a database called amir i want to connect to it from a Linux client on the same...
Hi i have .NET webservice. i want to consume it from qt client. i know how to consume web service in .net but this is my first application in qt from which i want to consume .NET web service please help me out with some step by step code to consume web service
Your best bet is probably integrating gSOAP into your Qt application. (Make sure it's Licensing terms are ok for you.)A good run-down of how to do the integration is GSoap: SAOP and XML Web services for Qt apps (includes a sample .zip file). That doesn't require a specific version of Qt...
Hi,Myself a begineer in QT programming. I captured several images periodically (JPG) from a qt application running on my pc.I need to transfer all the images to a qt aplication to another pc using qtcp sockets while the application is running.How to write the server to receive the images...
I have taken a geotiff image from MODIS and i want to get a pixel (x,y) from that source image based on the longitude and latitude. I need a formula that how to calculate this without projection, any help would be appriciate.What I have tried:math - Convert longitude and latitude...
You need the image dimension in pixels (width and height), a lat/lon reference point at a specified pixel position (e.g. lat0 and lon0 at x = y = 0), and the lat/lon degress covered by the image (e.g. by having another reference point at max. x and y).First step is calculating the scaling...
I have DDS textures (DXT1, DXT3, DXT5) in a memory buffer. I want to convert these to QImages. The textures are in main memory not in the graphics card memory. I have searched Qt's documentation extensively and believe this can't be done with one simple function. It can be done by writing the...
Hello everyone, how can i get the x, y based on longitude and latitude? Lets say i have geostationary image data ( float* data = new float[ 2750* 2750] ) and i want to extract the some are of my data. What I have tried: In order to do this i am using the Proj4 library. double dCenterLon = 80;...
longitude and latitude are global numbers , to plot your place mark on map so those can't be converted to X and Y how can we? Image is small substance whereas Long / Lat are global number on map (world map) by the way here are few links about library you are using - proj.4 — proj.4 4.9.3...
Recompile the original source with an ARM compiler: you can't convert X86 machine code (which is what the library will contain) to ARM machine code - they are totally different processors and indeed types of processor. X68 is CISC, ARM is RISC (according to the manufacturer anyway: I disagree).
This article will teach you how to create an amazing, clean and smooth WPF/Winform UI for your native application without using any complex, unsafe, ActiveXish methods, etc.
How i can create .bundle extension file using Qt creator example(Myplug.bundle). I am in a work to create a plugin to already existing application that applications plugins are in bundle format. i found some sample code in Xcode to create bundle .How I can create such a project using QtCreator
Before we can use custom widgets in Qt Designer, we must make Qt Designer aware of them. There are two techniques for doing this: the "promotion" approach and the plugin approach.Promotion approachThe promotion approach is the quickest and easiest. It consists of choosing a built-in Qt...
Hi,I want to create Web Service in WCF .net C#. The client that will connect my server have QT framework on Linux.Which kind of binding i should use in my WCF endpoint to support clients for that system?(I need also to let the user to register to events in my system. For example by...
It's really not that hard to use google ("wcf web service linux client"). Here's one of the 210,000 hits returned:http://coab.wordpress.com/2009/10/15/calling-wcf-services-from-a-linux-c-client-using-gsoap/[^]
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