Qt Connect Lambda With Parameter

getConfigurations() is slow, taking 3 or more seconds 7172749 Xrender: class cast exception in 2D code running an AWT regression test 8017629 G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages 8022582 relax response flags checking in sun. No installation or download needed, just qt5 c++ 11 connect (3). Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. The setup parameters and general request properties are manipulated. A tiny library that simplifies the use of React without JSX. But, Qt documentation is not a tutorial on how to use Qt. Qt - Connect slot with argument using lambda Tag: python , qt , lambda , pyqt , signals-slots I have a couple of widgets that will be connected to a single function which required extra arguments. Thats where Lambda Tags we are now configuring Lambda runtime parameters appropriately at the sandbox stage and we’re feedback, or suggestions below — or connect with me. While it is nice to use the Qt framework from Python it is even better to be able to quickly create Python bindings for your own Qt libraries and use their API from Python with relatively little work. (since C++17) in the parameter declaration of a non-type template parameter: template < auto I > struct A;. ' Add the following directive to the file: ' Imports System. For example, the following code creates a function with three parameters, two of which have default values. You can change your ad preferences anytime. In the following example, the TextSender class emits a textCompleted() signal which carries a QString parameter. net Core,Entity Frameowrk Core,Interview questions,csharp tutorials, c-sharp tutorials,C# Interview Questions, csharp Interview. In case you've missed it, lambda expression support has been added to C++ in C++11. You can vote up the examples you like or vote down the ones you don't like. 6 and earlier allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by cpio after the decompression is complete. AWS Lambda, Amazon Web Services' event-driven compute service in the cloud, is adding support for Microsoft's C# language. - Fixed prompting to connect when an FTPS SSL certificate's common name doesn't match the host name. There won't be any difference, since you've only changed the scope of the variables. func will be the integer coming from currentIndexChanged. Making Connections to Lambda Expressions. Connection strings for Paradox. What does that mean for Qt?. We then do a concept enforcing demo for you to try them out. For any GUI application using Qt, there is precisely one QApplication object, no matter whether the application has 0, 1, 2 or more windows at any given time. Right now, you'll also need to refer to the D-Bus specification, Doxygen reference documentation, and look at some examples of how other apps use D-Bus. Cross-platform software development at its best. Combining Qt's Signals and Slots with c++0x lamdas. they are just needed where they have been created. a helper class and example of how to use a lambda function (c++11/c++0x) as a slot of connect functions - caetanus/lambda-connect-qt4. Warns when using the 3-arg QObject::connect that takes a lambda. Q&A for Work. Qt documentation is a very valuable piece of information. Lambda expression is a new feature which introduced in java 8 programming language. ,vlcuser99 Audio: macOS / iOS / tvOS,19281,Audio issues with Apple TV airplay and bluetooth connection. You can vote up the examples you like or vote down the ones you don't like. This video is unavailable. The (slightly simplified) general form of a lambda function is: [captures] (parameters) -> returnType {body} The leading [] is what tells the compiler this is a lambda function. vpc_config requires the following:. org Mailing Lists: Welcome! Below is a listing of all the public Mailman 2 mailing lists on mail. Context Object. Argument signature is a string containing the full signature (c++ prototype) of the signal. In the following example, we connect a signal that has a QString as a parameter to a slot that takes a QVariant. com is now LinkedIn Learning!. In this post we’re going to show you how to supercharge your Amazon Connect contact flows using AWS Lambda, Node. Creating Threads C++11 2. The parameters make the stored procedure more flexible and useful. Parameters: topic - the topic to publish to. Aws lambda android examples. Qt is well known for its signals and slots mechanism. That is we can pass lambda expression as method parameter, how method can use or consume it. This tutorial is not complete; it probably contains some useful information, but also has plenty of gaps. Thats where Lambda Tags we are now configuring Lambda runtime parameters appropriately at the sandbox stage and we’re feedback, or suggestions below — or connect with me. How Qt Signals and Slots Work - Part 2 - Qt5 New Syntax This is the sequel of my previous article explaining the implementation details of the signals and slots. How To Pass Parameters To Lambda Function. qt_debug,CURSOR (18835) (Information about the ORACLE cursors that the DataServer uses for internal ORACLE Call Interface (OCI) calls and for opening queries. The following are code examples for showing how to use PyQt4. Connect(src, SIGNAL(linkActivated(QString)), A simple method is to have an intermediate slot that calls the slot that you want. So, the next best thing is a warning at runtime I think. People who have LQTS also can have arrhythmias. However, if the user provides a value for -Id, then PowerShell will not prompt for the other values of the Parameter Set. widgets is a dictinary with keys for the group of buttons, to make it short let's say it have 2 buttons[QToolButton], linked to their keys: 'play' and 'stop'. Jan 22, 2017 · Qt Slots and C++11 lambda. If you include your function source inline with this parameter, AWS CloudFormation places it in a file named index and zips it to create a deployment package. Q&A for Work. What are these lambda things anyways? A lambda is essentially a fancy name for an anonymous function. Modern operating systems usually provide a special area on the desktop, called the system tray or notification area, where long-running applications can display icons and short messages. In Qt, connecting a signal to a slot is done as follows: Now you can connect a signal to a lambda expression: it has parameter(s) in and it has code block in. Lambda syntax. From: Subject: =?Windows-1252?Q?EDUfran=E7ais2004?= Date: Wed, 21 Feb 2007 10:25:01 +0100 MIME-Version: 1. A lambda avoids the declaration of a verbose slot in Task. Welcome to the Qt wiki. It runs in response to events on different AWS. Linq namespace. Variability with respect to QBO will also be discussed. Using delegates you can pass a lambda expression as a parameter to a function, and then use it in LINQ queries. Qt Development General and Desktop I would strongly advise to add a third parameter to the connect to scope the life of the connection. com is now LinkedIn Learning!. If you use this flag you are not able to connect the same connection again. net Core,Entity Frameowrk Core,Interview questions,csharp tutorials, c-sharp tutorials,C# Interview Questions, csharp Interview. ,Audio: macOS / iOS / tvOS,2. The magic is done in FillMetaStructs() to maintain the meta object structure each time a new connection is made when Call() is called. ; Under Add Input click on the Link to data source link for the A & B properties and the Result checkpoints. Does using C++ Lambda functions as slots in Qt help to preserve binary compatibility of a use lambdaas slot qt Slots allow communication from QML to C++: Slots are used to trigger C++ code from QML. published at 06. In this blog article, I show portions of Qt5 code, sometimes edited for formatting and brevity. In the Part 1 , we have seen the general principle and how it works with the old syntax. 2017-04-01. This feature is not available with the string-based syntax. Running and debugging AWS Lambda functions locally with the Serverless framework and VS Code July 25th 2017 One of the complaints developers often have for AWS Lambda is the inability to run and debug functions locally. Starting with the ODBC Driver 17. You also need to run the. 2 [source] [hipe] Eshell V5. Advanced Topics in Developing ArcGIS Apps with Qt. Qt - Connect slot with argument using lambda Tag: python , qt , lambda , pyqt , signals-slots I have a couple of widgets that will be connected to a single function which required extra arguments. Hi, Remove the &. This is especially true in spoken language. The AWS CloudFormation stack creates the Lambda function and an IAM role that is attached to the Lambda function with the required permissions. NASA Astrophysics Data System (ADS) Dinessen, Frode. An installer for updated versions of GCC is available at and should make this package work in connection with Haskell-Platform. C++11/C++14 Thread Tutorials C++11 1. It was my first foray. 1566016304982. We then do a concept enforcing demo for you to try them out. Lambda syntax. You can vote up the examples you like or vote down the ones you don't like. Next we will point the values of the Add activity to the values in our ALMDEBUG excel file; Click on the Add activity’s Properties Input/Checkpoints icon. The parameters make the stored procedure more flexible and useful. Connection to a PC. While you don’t need Lambda to create a skill, Amazon has made it very convenient to use for this purpose. It's almost always something small and easily worked around, but it would be nice if it were just there. Running and debugging AWS Lambda functions locally with the Serverless framework and VS Code July 25th 2017 One of the complaints developers often have for AWS Lambda is the inability to run and debug functions locally. The Lambda Permission's logical ID needs to match the Serverless naming convention for Lambda Permissions for S3 events. When you invoke Lambda using an ARN directly from the "Resource" field, you cannot specify. Example for a one second (1000 millisecond) timer (from the Analog Clock example):. Looking through IoT, it looks like authenticating the user is a prerequisite for IoT to manage a device's connection. Some database heavy operations may benefit performance-wise from being executed inside the same memory space as the database. All the information (slot to call, parameter values, ) are stored inside the event. getConfigurations() is slow, taking 3 or more seconds 7172749 Xrender: class cast exception in 2D code running an AWT regression test 8017629 G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages 8022582 relax response flags checking in sun. Background. AWS provides a tutorial on how to access MySQL databases from a python Lambda function. The Eclipse Foundation provides our global community of individuals and organizations with a mature, scalable and commercially-friendly environment for open source software collaboration and innovation. This gives you the increased productivity of this. Just hover the mouse over Where in your code, and IntelliSense would show. org Mailing Lists: Welcome! Below is a listing of all the public Mailman 2 mailing lists on mail. Check your Options in the drop-down menu of this sections header. php(143) : runtime-created function(1) : eval()'d code(156) : runtime-created. The charts are produced from a manually interpretation of satellite data where SAR (Synthetic. Not only you can now use typedef or namespaces properly, but you can also connect signals to slots that take arguments of different types if an implicit conversion is possible. The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada, Go, and D, as well as libraries for these languages (libstdc++,). net, and on the Qt Creator mailing list. connect-3arg-lambda. This approach is applied to the fault diagnosis of rolling bearing , and the results have shown the efficiency at detecting roller bearing failures. It also has a signal attribute that is the signature of the signal that would be returned by Qt's SIGNAL() macro. [capture](parameters) { body }; where capture specifies which symbols visible in the scope where the function is declared will be visible to the body of the lambda, parameters is the list of parameters passed into the lambda, and body is the definition of the function. Q&A for Work. I am, however, beginning to believe that it is a futile effort. The QTimer class provides a high-level programming interface for timers. Qt Development General and Desktop I would strongly advise to add a third parameter to the connect to scope the life of the connection. Red Hat Enterprise Linux 3 CentOS Linux 3 Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 Race condition in cpio 2. Some database heavy operations may benefit performance-wise from being executed inside the same memory space as the database. This tutorial is not complete; it probably contains some useful information, but also has plenty of gaps. cc in MySQL 4. You can vote up the examples you like or vote down the ones you don't like. Menus and Widgets in Qt. No reviews matched the request. connect-3arg-lambda — I'm not sure this is good advice, at least not as presented here. - Fixed crash when an FTP Profile's "Encoding" setting is set to either "Unicode" or "Unicode (Big Endian)". in the type specifier of a variable: auto x = expr;. zip * By using pip with parameter -t we can specify where we want to install the libraries on our local folder (1). Add as many as you like. But when trying to run sqlplus as system user, we get the error: ORA-12504: TNS:listener was not given the SERVICE_NAME in CONNECT_DATA Obviously the first thing I did was look in our tnsnames. Host a Custom Skill as an AWS Lambda Function. Now, we don't have to query miniport drivers directly. This patch replaces [Shorthand] parameter in CSSPropertyNames. Having such signal would allow developers to resize a QLabel, a QLineEdit, ect. Qt uses the timer's thread affinity to determine which thread will emit the timeout() signal. vpc_config requires the following:. See the image below. I would like to eliminate that step. Jan 21, 2017 · The pointers to the source and target objects of connect. developers. While it is nice to use the Qt framework from Python it is even better to be able to quickly create Python bindings for your own Qt libraries and use their API from Python with relatively little work. Our lambda is passed directly as a parameter to the connect function. The C++11 specification for a lambda function looks like this: [capture](parameters) -> return_type. To illustrate a "fully formed" lambda, we can define one that returns a formatted version of the task name. Updated to include Outlook 2019. You can also find us on IRC on #qt-creator on chat. vpc_config requires the following:. Hacker Noon is an independent technology publication with the tagline, how hackers start their afternoons. connect-3arg-lambda — I'm not sure this is good advice, at least not as presented here. Aws lambda android examples. Qt's signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal's parameters at the right time. args ( list ) – The arguments which were emitted by the signal, or None if the signal wasn’t emitted at all. Then connect QML signals to corresponding signals of an instance of this dummy class, using the old connect syntax. 10_x86 Unbundled Product: JavaSE Unbundled Release: 8 Xref: This patch available for sparcv9 as patch. Lambda basic definition: Parameters => Executed code. An installer for updated versions of GCC is available at and should make this package work in connection with Haskell-Platform. They are extracted from open source Python projects. Qt:: UniqueConnection is not really a connection type but a modifier. C# LINQ Examples: System. Since the function is intended to retrieve caption of the clicked button, the button object should be passed as an argument. It handles widget specific initialization, finalization. This has many consequences: we can call it, assign it, and return it. Lambda basic definition: Parameters => Executed code. This video discuss the processing of lambda expressions in method. In the following example, we connect a signal that has a QString as a parameter to a slot that takes a QVariant. Qt5 having a new connection syntax which allows for the use of lambdas and QtConcurrent already beeing capable of using lambdas QTimer or more specifically QTimer::singleShot() is lacking both. Use the Publish parameter to create version 1 of your function from its initial configuration. org Mailing Lists: Welcome! Below is a listing of all the public Mailman 2 mailing lists on mail. Because the EventArgs parameter is an object, it supports whatever properties and methods are necessary. Kafka Streams is a client library for processing and analyzing data stored in Kafka. {"categories":[{"categoryid":387,"name":"app-accessibility","summary":"The app-accessibility category contains packages which help with accessibility (for example. Here's the relevant parts of the code that is failing: QAction exitApplication. This blog post addresses that and provides fully working code, including scripts for some of the steps described in their tutorial. Qts signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signals parameters at the right time. The following are code examples for showing how to use PyQt5. btnstate(self. a about after all also am an and another any are as at be because been before being between both but by came can come copyright corp corporation could did do does. published at 06. Qt:: UniqueConnection is not really a connection type but a modifier. Here, I want to briefly discuss how the same effect can be achieved with Qt itself. functions without a name. The example below uses the well known clicked signal from a QPushButton. The [&evenCount] part specifies the capture clause of the expression, (int n) specifies the parameter list, and remaining part specifies the body of the expression. Unfortunately, despite these cool features you deal with text. The magic is done in FillMetaStructs() to maintain the meta object structure each time a new connection is made when Call() is called. Signals and slots can take any number of arguments of any type. Buttons b1 and b4 are connected to whichbtn() slot method. Amazon S3 can publish events (for example, when an object is created in a bucket) to AWS Lambda and invoke your Lambda function by passing the event data as a parameter. Lambda Expressions and Qt 4. Red Hat Enterprise Linux 3 CentOS Linux 3 Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 Race condition in cpio 2. SLOT() macros allow Python to interface with Qt signal and slot delivery mechanisms. Long QT syndrome (LQTS) is a disorder of the heart's electrical activity. This means that value members of a lambda cannot be move-only types. Teach students how restriction enzymes are used in genetic engineering. hello is the function that has two parameters: We need to create a connection between the database and our serverless. Home Qt Development General and Desktop [SOLVED] How to pass a signal forwarded parameter into a lambda, defined in the connect statement?. test:func() Although the parameter has a default, it will be replaced if a parameter is passed. Learn how you can help us plan Community Day and the new Community Evening this year at. Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 The check_connection function in sql_parse. Hello, Generally, I am struggling to find some exhaustive documentation or IDE for rules and lambda functions and the xtend language. ora to make sure the SERVICE_NAME parameter was in there properly: (FYI the server name is. Within the braces is the code for the lambda function. We can make things even simpler by adding the NOTIFY parameter when declaring the someattribute property. It allows Clients to verify the identity of the End-User based on the authentication performed by an Authorization Server, as well as to obtain basic profile information about the End-User in an interoperable and REST-like manner. Run the following AWS CLI command:. they are just needed where they have been created. [capture](parameters) { body }; where capture specifies which symbols visible in the scope where the function is declared will be visible to the body of the lambda, parameters is the list of parameters passed into the lambda, and body is the definition of the function. Only lambda-expressions defined at block scope or in a default member initializer may have a capture-default or captures without initializers. You can change your ad preferences anytime. This video is unavailable. I’m taking the bodies of the two conditions and Oring them in a new lambda expression. UDP sockets using C++/Qt and PyQt/Qt Framework. with a simple signal-slot connection. I find it a lot of guess-work concerning what types are defined, how the syntax shou…. Notice that the Q_OBJECT macro is mandatory for any object that implements signals, slots or properties. This video starts off by creating a lambda using the AWS console at https://aws. Amazon S3 can publish events (for example, when an object is created in a bucket) to AWS Lambda and invoke your Lambda function by passing the event data as a parameter. The length of the result is determined by n for rt, and is the maximum of the lengths of the numerical arguments for the other functions. Making Connections to Lambda Expressions. When the function is called with only one parameter, the default values for the parameters are. Typical values of geotechnical parameters provided by Geotechdata. You need to pay for the service only when you run the code. class GroupParameter (Parameter): """ Group parameters are used mainly as a generic parent item that holds (and groups!) a set of child parameters. However, it is not possible to connect to a signal in this way in some cases, such as when: Multiple connections to the same signal are required. You will learn how to use AWS Lambda for specific use cases like web app development, mobile applications, file processing, or stream data processing. It is the place to find everything related to Qt. In this video I'll show you how to create a front-end for your Lambda functions. To illustrate a "fully formed" lambda, we can define one that returns a formatted version of the task name. Also this lambda seems. In MySQL, a parameter has one of three modes: IN,OUT, or INOUT. UDP sockets using C++/Qt and PyQt/Qt Framework. In this blog article, I show portions of Qt5 code, sometimes edited for formatting and brevity. - Fixed crash if a server returns an invalid date in an MDTM request. The QObject class is the base class of all Qt objects. Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. From: Subject: =?Windows-1252?Q?EDUfran=E7ais2004?= Date: Wed, 21 Feb 2007 10:25:38 +0100 MIME-Version: 1. From: Subject: =?Windows-1252?Q?EDUfran=E7ais2004?= Date: Wed, 21 Feb 2007 10:27:09 +0100 MIME-Version: 1. I am fairly new to QT, having some difficulty understanding the basics of binding C++ and QML. Buttons b1 and b4 are connected to whichbtn() slot method. C# Tutorials,ASP. I would like to reference a project parameter as the connection string for a connection. Connect using SQLite. Only lambda-expressions defined at block scope or in a default member initializer may have a capture-default or captures without initializers. Tip: Don't put your Lambda function in an Amazon VPC unless you need it to access other resources in the VPC. Merge: b411f36bca 87442a536e Matthias Kuhn 2019-01-15 Merge pull request #8835 from rldhont/bugfix-oracle-compile-expression-like-218 [Bugfix][Oracle] Add ESCAPE when compiling LIKE rldhont 2019-01-11 [Bugfix][Oracle] Add ESCAPE when compiling LIKE The oracle SQL documentation specifies that *there is no default escape character* and *the escape character, if specified, must be a character. Limitation is the fact the latency and intervals cannot be directly changed but via the given constants:. The QTimer class provides a high-level programming interface for timers. You need to pay for the service only when you run the code. The (slightly simplified) general form of a lambda function is: [captures] (parameters) -> returnType {body} The leading [] is what tells the compiler this is a lambda function. In a matter of minutes and without a single line of code, Zapier allows you to connect AWS Lambda and MySQL, with as many as 12 possible integrations. Material for 32 students. AWS Lambda is a server less computing platform. This supports adding a query string parameters that will be recognized by the API Gateway. Qt使用connect函数时向slot传递参数:使用lambda表达式 2017年06月13日 16:46:10 imred 阅读数 4533 版权声明:本文为博主原创文章,遵循 CC 4. Notice: Undefined index: HTTP_REFERER in /home/forge/shigerukawai. Signals and slots can take any number of arguments of any type. The lambda function also ends up running for the full 60 seconds that I've set for the timeout. A serverless infrastructure based on AWS Lambda has two key benefits: You don’t need to. They will not be running "simultaneously". It runs in response to events on different AWS. net, and on the Qt Creator mailing list. How Qt Signals and Slots Work - Part 2 - Qt5 New Syntax This is the sequel of my previous article explaining the implementation details of the signals and slots. ̸̈́́͜͡Ṕ̸̸̈́̈́́͜͜͡͡á̸̸̈́̈́́͜͜͡͡ǵ̸̸̈́̈́́͜͜͡͡á̸̸̈́̈́́. In the following example, we connect a signal that has a QString as a parameter to a slot that takes a QVariant. In this article we are going to see how to take advantage of lambda expressions in your Qt code to simplify it. Does using C++ Lambda functions as slots in Qt help to preserve binary compatibility of a use lambdaas slot qt Slots allow communication from QML to C++: Slots are used to trigger C++ code from QML. waitSignal(), this parameter does not consider the qt_default_raising ini option option. Search: Search. See the image below. Here you will be able to execute your code without provisioning or managing servers. Updated to include Outlook 2019. But the prevailing industry standard is to write messages as if they started with "This commit will. They are extracted from open source Python projects. Within the braces is the code for the lambda function. To consider scalability and distributed architecture, the format of the name space consists of object category, local name, domain name, and parameters. Add as many as you like. Aws lambda android examples. Qt signal slot over thread, is this the safe way? c++,multithreading,qt,qtcore,qt-signals. Passing information through API Gateway (Getting started with AWS Lambda, part 4. this added 8046817 JDK8 schemagen tool does not generate xsd files for. whichbtn(self. In this case we simply delegate the call to callbackFunction(). Qt's signals and slots mechanism does not require classes to have knowledge of each other, which makes it much easier to develop highly reusable classes. Starting with the ODBC Driver 17. From: Subject: =?Windows-1252?Q?EDUfran=E7ais2004?= Date: Wed, 21 Feb 2007 10:27:30 +0100 MIME-Version: 1. Typical values of geotechnical parameters are given for different soils according to USCS. But with so many commands, it seemed too daunting a task. NASA Astrophysics Data System (ADS) Dinessen, Frode. The problem is the arguments are getting replaced in the loop and the lambda function is passing only the last one set. If your Lambda function adds or edits a read-only header, the request fails CloudFront validation. The type is deduced from the initializer. Note that we do not specify the return type of our lambda function because C++11 is clever and will figure it out automatically. In this case we simply delegate the call to callbackFunction(). And no one likes deadlocks (at least I don't know anyone). Last but not least, QObject provides the basic timer support in Qt; see QTimer for high-level support for timers. Qt is currently being developed both by the Qt Company, a subsidiary of Digia, and the Qt Project under open-source governance, involving individual developers and firms. The QTimer class provides a high-level programming interface for timers. Threads Events QObjects. The oldest Qt version I have built it for is 5. This gives you the increased productivity of this. ConnectionId (string) -- [REQUIRED] The identifier of the connection that a specific client is using. This way, we can set our test data in event. You can vote up the examples you like or vote down the exmaples you don't like. Parameter name: connectionString Can you provide an example of what a valid connection string would look like? I know that line isn't empty. com From 2006-2016, Google Code Project Hosting offered a free collaborative development environment for open source projects. using QMainWindow open a new. Kafka Streams. Because I want to create a project connection and to parameterize it's connection string with a project parameter. After all, the signal-slot connection mechanism only specifies how to connect a signal to a slot - the signal's arguments are passed to the slot, but no additional (user-defined) arguments may be directly passed. If for some reason you can't change the method to have a parameter then you could use a lambda expression to "adapt" those 2:. For example, the following code creates a function with three parameters, two of which have default values. The argv coming from the signal is an array of pointers to the arguments. qt connect slots Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. If you use this connection type on QObjects that are in the same thread you will have a deadlock. In case you've missed it, lambda expression support has been added to C++ in C++11. Qt is a cross-platform application development framework. Tree-parameter data from ground studies is compared to L-band polarimetric data (in both uncorrected and topographically corrected forms) for two test areas. The QTimer class provides a high-level programming interface for timers.