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QT5.14.2 Unlocks the unlimited possibility of Qt's customized title bar, and has a unique personalized window with one key! Through the actual practice of this article, we successfully implemented a basic custom title bar. Of course, this is just a starting point. You can further expand and optimize it according to your needs, such as adding transparency adjustment and user-defined buttons. original 2024-04-08 11:22:23 · 489 Reading· 0 Comments -
Qt5.14.2 Uncover the potential hidden problems of Qt log artifact efficient diagnostic program With the QLoggingCategory:: installMessageHandler function, you can customize the processing callback function for log output to redirect log information to a file instead of directly outputting it to the console. In this way, we can persistently store the log information of the Qt program to a file and no longer rely on the console output, thus facilitating the collection and management of logs. In a word, in the process of developing Qt applications, we need to always be alert to the code's "internal weakness and external discouragement", and find and troubleshoot problems in a timely manner. This function will be called when Qt outputs logs. We open a file named log.txt inside the function and write the log information to the file in a specific format. original 2024-04-03 19:50:41 · 1118 Reading· 0 Comments -
Qt 5.14.2 Cryptographic Armor - Analysis of Comprehensive Data Protection Tactics Specifically, encryption is to convert the original readable plaintext data into the unreadable ciphertext data by using the combination of key and encryption algorithm. In short, Qt provides programmers with a comprehensive cryptography toolbox. Only by mastering the use of relevant APIs, can we write safe and reliable programs. In the future, perhaps the development of quantum computing will completely change the face of cryptography, but at present, it is our duty to follow known best practices. Data encryption is a process of converting plaintext data into ciphertext data, which makes it impossible for unauthorized people to directly read and understand the data content, thus protecting the confidentiality and integrity of data. This can effectively prevent similar data from generating similar hash values. original 2024-04-02 17:14:41 · 1249 Reading· 0 Comments -
Qt5.14.2 Uncover Qt multithreading to create smooth and efficient desktop applications! Qt multithreading has a broad application prospect. It can not only improve the performance of desktop applications, but also play an important role in embedded devices. With the development of technology, we can foresee that Qt multithreading will bring more innovations and breakthroughs. In this article, we have only touched the surface of Qt multithreading. In actual projects, how to gracefully handle synchronization and communication between threads and how to avoid common multithreading traps are topics worthy of in-depth discussion. In the next article, I will take you to the advanced application of Qt multithreading. Please wait! original 2024-04-02 15:47:13 · 755 Reading· 0 Comments -
Qt5.14.2 Leads the World! Self made Qt5 P2P chat artifact makes security and reliability no longer a dream In the last article, we have learned how to use Qt to develop a basic P2P chat system, and carried out code practice on user management on the server side, network interaction on the client side, audio and video processing and other modules. However, basic communication functions are not enough. If we want to develop a trustworthy chat application, we must also focus on the two core requirements of system security and μ. Today, we will comprehensively analyze how to realize these two aspects of technical support in P2P architecture. original 2024-04-01 12:43:27 · 713 Reading· 0 Comments -
Qt5.14.2 P2P chat system development practice, cross platform call zero distance So far, we have learned how to use Qt5 to efficiently develop a P2P chat system. In the actual project, we also need to further consider security, reliability, user authentication, disconnection reconnection, data caching and retransmission, data redundancy and error correction, load balancing, etc. In the next blog, I will deeply analyze the above functions for you, so that we can jointly climb the peak of event programming! original 2024-04-01 12:28:53 · 1086 Reading· 0 Comments -
Qt5.14.2 Qt Multi thread Black Technology for Large File Processing Through the sharing of this article, I believe you have a deeper understanding of how to efficiently and safely process large binary files in the Qt multithreaded environment. Although handling concurrent access to large files requires extra care, Qt provides us with a powerful toolbox to find the best balance between performance and security. original 2024-03-31 10:45:39 · 1389 Reading· 0 Comments -
The splendid opening of Qt5.14.2 program makes the Splash window release infinite possibilities! As an excellent software with pursuit, the small Splash window at startup can be regarded as the image ambassador of the program, which shows the exquisite taste of software and extraordinary hospitality. Today, let's enjoy Qt's profound understanding of this "opening sketch" - Splash window design, and feel the extraordinary pursuit of Qt gods in program startup experience! original 2024-03-31 10:27:49 · 954 Reading· 0 Comments -
Qt5.14.2 Timer Dark Magic, one key wake-up delay task Looking at the many capabilities provided by QTimer, we have to admire the foresight of the Qt gods. They started from the bottom and built an extremely powerful timer system for us to help us easily achieve various "delayed task" requirements. Of course, when using QTimer, Qt gods also explained some precautions: stop and destroy the QTimer objects that are no longer needed in time to avoid resource leakage. For timers of non GUI threads, we should pay attention to the existence of event loops, reasonably allocate the types of timers, and avoid unnecessary CPU overhead. In short, as long as we follow the teachings of Qt gods, timers, a seemingly simple task, can also play its due role, This is the icing on the cake for our program. original 2024-03-30 20:12:06 · 915 Reading· 0 Comments -
Qt5.14.2 Clever clipboard - Qt makes "copy and paste" more efficient As the standard function of modern graphical interface program, clipboard operation is undoubtedly one of the most common scenes in daily office and programming. In the field of Qt, the gods have also prepared a powerful tool for us - the QClipboard class, which makes the copy and paste operation unprecedented simple and efficient. Today, let's take a look at the truth and appreciate the extraordinary skills of Qt gods in this respect! original 2024-03-30 09:25:42 · 1018 Reading· 0 Comments -
Qt5.14.2 God's drag and drop art, elegant and powerful interactive experience As a graphical interface software, good user interaction experience is the key to success. In the peerless programming of Qt gods, drag and drop undoubtedly occupies a very important place. It is not only simple and intuitive to operate, but also can complete a large number of seemingly complex tasks. It is a sharp tool to improve the quality of user experience. Today, let's enjoy the wonderful skills of Qt gods in this field! original 2024-03-30 08:01:18 · 805 Reading· 0 Comments -
Qt5.14.2 Omnipotent Qt Database Operation Tour Through the above introduction, we have preliminarily appreciated the extraordinary attainments of Qt gods in the field of database programming. Of course, this is just the tip of the iceberg. In fact, they have far more control over database development. For example, in terms of SQL queries, Qt provides a powerful QSqlQueryModel to help us build any customized data view; For example, in terms of database report output, The Qt Preview framework provides us with ready-made solutions, etc. original 2024-03-28 21:24:31 · 1110 Reading· 0 Comments -
Qt5.14.2 On How Qt God Operates the Computer System Gorgeously As a programmer, it is inevitable to deal with computer systems. The best way to effectively communicate with the system and command it to work for us is to have a strong cross platform development framework. Today, let's enjoy how Qt can gallop freely in this field and control the system gracefully to complete various tasks! original 2024-03-28 19:27:52 · 1052 Reading· 0 Comments -
QT5.14.2 code heat wave, and use Qt5 to blast into the multimedia frenzy In this visual and mobile era, multimedia applications have undoubtedly become the hot topic of modern computer programs. Whether it's camera recording, video player, audio visualization GIF animation browsing has brought the user experience to an unprecedented level. If we want to win in this hot land, our flag is the cross platform framework of Qt5! Compared with other multimedia development solutions, The biggest unique skill of Qt5 lies in its strong cross platform capability. Whether it's Windows MacOS, Linux, Android or iOS, Qt5 can get along with it as intimately as making good friends, without estrangement. original 2024-03-27 17:15:37 · 1180 Reading· 0 Comments -
QT5.14.2 Fingertip Gas Station - Ignite the Artistic Spark of Qt5 Image Operation Have you ever been deeply attracted by the magic of image processing? The artistic beauty of image processing is fully displayed here, whether it is a filter like blur effect, a colorful coloring operation, or a lifelike shadow mapping. Fortunately, with the powerful Qt5 framework, we can fully wield these wisps of image magic in our own applications! Today, let me take you into the gorgeous country of Qt5 image operation to explore the highest palace of this technology. We will reveal the secrets behind the realization of advanced artistic effects such as image distortion, blur, coloring, shadow and transparency, and there are a large number of vivid code examples to guide you! As long as you keep up with the rhythm, you will soon be able to gallop freely on the road of image processing and travel endlessly! original 2024-03-27 16:59:19 · 1134 Reading· 0 Comments -
Qt5.14.2 Fully unlock the essence of Qt5 event handling In the last blog post, we looked down at the magnificent process of Qt5 event weaving from a high altitude. Whether it's the most common mouse click, the most advanced multi touch gesture, or event transmission across threads, Qt5 has provided developers with a complete set of event handling solutions and powerful tool chains, just waiting for you to give full play to Yuyang's power and enjoy the fight. Now, let's take a look at the most common and crucial mouse and keyboard events! After all, they are just like the limb nerves of GUI applications, carrying everything of human-computer interaction. So, How does Qt5 help us accurately capture and elegantly respond to these interactive instructions from users? Let's break through the dense fog and reveal them one by one! original 2024-03-26 19:02:05 · 802 Reading· 0 Comments -
Qt5.14.2 Uncover the Event Mechanism, Let Your Application Follow Its Order For standard GUI events, Qt5 has provided us with complete event classes and processing mechanisms. However, in some cases, we also need to define the event type of the application itself to deliver program specific notifications and messages. Public: private: Q_OBJECTpublic: protected://Send custom event "); First, we defined a MyEvent class that inherits from QEvent, and specified a unique Type value for it. Then, in the event() function in MyObject, we check the incoming event type, and if it is MyEvent, we will process it. original 2024-03-26 18:33:09 · 863 Reading· 0 Comments -
Qt5.14.2 Qt5 Awakening of the Graphic Force, Peeping into the Infinite Future of Image Operation Compared with other graphical interface frameworks, The biggest highlight of Qt5 is its native multimedia capability. In Qt5, no matter the operation of image, video or audio, there are ready-made class libraries for you, which are as convenient and efficient as flowing water. Today, let's take a look at the Qt5 image class and see how to control images at will in the program. original 2024-03-25 13:30:22 · 911 Reading· 0 Comments -
QT5.14.2, Qt5 takes you back to the drawing brush to draw wonderful graphics Programming is not only to write logic, but also an art. How to paint a perfect picture in the code world? Today, we will learn about Qt5's powerful graphic drawing function, and see how to use code to outline text, lines, ellipses, even 3D scenes and large-scale 2D graphic collections, adding infinite charm to your application! original 2024-03-25 13:18:02 · 1200 Reading· 0 Comments -
Qt5 file operation is under control, and can read, write, delete or change anything As a C++cross platform graphical interface development framework, Qt5 not only provides a powerful interface building capability, but also has excellent functional support in file operation. Today, we will comprehensively explore Qt5's file operation capability, and see how it allows us to do whatever we want with the file system: create new folders, read and write text content, delete file names, and even operate INI and XML files. Follow me to start the journey of Qt5 file system! original 2024-03-24 09:54:50 · 693 Reading· 0 Comments -
QT5.14.2 Qt5 components follow one's inclinations, from interface to practicality As a cross platform C++graphical interface framework, Qt5 comes with a wealth of components for us to use. Whether it is to build a beautiful UI interface or meet various practical needs, Qt5 can always perform unique skills for us with great interest. Today, let's explore the calendar component, login window, file dialog box, color selection dialog box, progress bar and Timer component in Qt5, and see their strengths! original 2024-03-24 09:44:44 · 943 Reading· 0 Comments -
Qt5.14.2 Qt5 Layout and Container Controls Uncover Secrets, Unify the Jianghu and Never Be Absent In the last article, we comprehensively explained the rich basic controls and data view controls under the Qt5 framework. However, it is not easy. If you simply place these controls, it will be difficult to create an elegant UI interface. Today we will explore the powerful layout and container management mechanism of Qt5, and learn how to arrange all the services of controls properly through flexible composition. original 2024-03-23 14:53:37 · 723 Reading· 0 Comments -
QT5.14.2 Qt5 controls are invincible, from buttons to tables Qt's model view architecture allows us to customize the display and editing behavior of data in views by implementing a QAbstractItemDelegate. Q_OBJECTpublic: In the paint() function, we can customize the rendering method of each cell to achieve custom requirements such as bar progress display, color code, etc. The createEditor () allows us to provide customized editing controls for the specified data type, such as using a QColorDialog for color data. Sometimes the built-in view of Qt is not enough? original 2024-03-23 14:19:19 · 1011 Reading· 0 Comments -
QT5.14.2 Deeply analyze the implementation principle of Qt reflection mechanism The Qt framework provides a powerful reflection mechanism, enabling us to dynamically create objects, query and call object properties and methods at runtime. Adhering to the concept of "no repeated invention", the Qt framework not only meets the core requirements of cross platform and high performance, but also provides rich dynamic expansion, enabling developers to choose appropriate solutions on demand. This metadata class contains the structural information of the class, such as class name, inheritance relationship, attribute, method signature, signal/slot, etc., and encapsulates the interface to access these metadata through the QMetaObject class. The reflection mechanism enables us to dynamically construct objects, access properties and call methods at runtime, breaking the limitations of static languages and improving the flexibility of code. original 2024-03-21 12:20:04 · 1536 Reading· 0 Comments -
QT5.14.2 Qt Layout Reconciliation: The Adaptive Magic Behind Smart UI Design Qt provides a series of layout classes, such as QHBoxLayout QVBoxLayout, QGridLayout, and more advanced QStackedLayout and QFormLayout help your applications maintain consistency and beauty under different window sizes and resolutions. The following is a more detailed Qt project, which implements a more complex user interface, including the combination of different types of controls and nested layout, and demonstrates how to optimize the layout by adjusting the size strategy. This level of SpacerItem will create a scalable space on the interface, maintain the beauty of the interface and provide more layout flexibility. original 2024-03-21 11:19:26 · 1817 Reading· 0 Comments -
QT5.14.2 Quintessence of Qt window application development As a cross platform graphical interface development framework, Qt has strong form development ability. Today, let's unveil the mystery of Qt form development! By setting various properties of the QWidget and overriding virtual functions, we can customize the appearance and behavior of the form. The title bar of the Qt form has minimize, maximize and close buttons by default. We can control the display of these buttons through setWindowFlags(), or customize the content of the title bar. Form programming is the core function of Qt. Mastering these skills will open the door to Qt programming. Then add custom controls on the form as the title bar. When you click and drag on these controls, you can change the position of the form. original 2024-03-20 20:38:50 · 471 Reading· 0 Comments -
QT5.14.2 Uncover the Mystery of Qt5 Original Object System and Unlock the Unlimited Gate of Application Development Before going deep into the meta object system, let's review the object system in Qt. Each object in Qt inherits from QObject, QObject provides some basic object functions, such as object tree, object attribute, signal slot, etc. This traditional object system has an obvious disadvantage: all Qt objects must explicitly inherit from QObject, which will bring inconvenience in some cases. Qt Object Model is a new object system introduced by Qt5. It provides a way to dynamically create and manage Qobjects without explicit inheritance. This greatly improves the flexibility and scalability of Qt, and opens a new door for us. original 2024-03-20 15:34:17 · 1087 Reading· 0 Comments -
QT5.14.2 Thorough Analysis of Qt QProcess Usage and Thorough Control of Process Operation Skills Before understanding Qt QProcess, let's first understand what a process is. Process is a core concept of operating system. When a program is executing, it will generate multiple processes, each of which has its own independent data space, so that multiple users can execute the same program at the same time without conflict. The process states are: newborn, execution, waiting, ready and finished. Each process has its own unique identifier, which we call PID. Next, we will introduce more about using QProcess for process operations, but we will cover this first in this article. original 2024-03-19 13:54:42 · 2618 Reading· 5 Comments -
Qt5.14.2 Qt Multi thread Practice Drill, comprehensively grasp the best practices of thread synchronization and thread pool Multithreaded programming is one of the basic abilities that every developer must master. In the last article, we learned the theoretical knowledge of Qt multithreading programming. This article will cut into practice and provide multiple case codes to help you thoroughly master Qt's practical skills of multithreading programming. original 2024-03-19 13:47:00 · 741 Reading· 0 Comments -
Qt5.14.2 Deeply understand Qt multithreaded programming and master the thread pool architecture to achieve efficient concurrency In high concurrency software systems, multithreading programming is an effective means to solve the performance bottleneck and improve system throughput. As a cross platform application development framework, Qt provides us with powerful multithreading support. This article will discuss the implementation details of Qt multithreaded programming in depth, and introduce the design idea of thread pool to help readers thoroughly master Qt multithreaded programming skills. original 2024-03-18 14:51:47 · 1918 Reading· 0 Comments -
QT5.14.2 Explore the mystery of Qt signal slot -- to make communication between objects more powerful As the core mechanism of the Qt framework, signals and slots not only make communication between objects smooth, but also demonstrate the powerful scalability of C++language. In this way, as long as the order status changes, The statusChanged signal will be triggered, The LogStatus slot function of Monitor will be automatically called to output the corresponding logs, instead of manually calling it. The whole process is automatic. thus it can be seen, QObject:: connect() is to bind the signal of the sender object to the slot function of the receiver object, so as to establish a communication channel between them. Through this example, we can see that the Qt signal slot mechanism makes the monitoring and communication between objects very simple and intuitive, and greatly enhances the maintainability and scalability of the code. original 2024-03-18 12:11:33 · 1391 Reading· 0 Comments -
QT5.14.2 The Charm of Object Tree -- Let Qt Programming Flow Qt, with its unique object tree model, has solved this problem for us, making programming twice the result with half the effort and running smoothly. At the same time, Qt also standardizes the execution order of construction and destruction. The post constructed object will be destructed before the parent object, avoiding the troublesome problem of resource release. Yes, in order to avoid memory leakage, we must manually delete each object instance, which will undoubtedly increase the complexity of development and maintenance. I believe that in the future, The Qt object tree will surely carry forward, bring us more programming convenience, and open a higher level object-oriented programming era! This example seems simple, but without the blessing of the Qt object tree, we must manually manage the creation and deletion of all controls, as well as the logic of memory release. The amount of code will multiply, and the work efficiency will be greatly reduced. original 2024-03-17 12:06:45 · 804 Reading· 0 Comments -
QT5.14.2 Explore the mystery of Qt string operation: How can Qt's QString become your programming tool? With our in-depth exploration of the world of Qt string operations, from basic segmentation and splicing to advanced formatting and case conversion, we have witnessed how QString has become an indispensable tool in Qt programming with its powerful functions and flexible API. Whether in interface display, data processing or network communication, QString has won the favor of developers for its efficiency and convenience. Qt's QString, a sharp programming tool, will meet every possible future together with you. However, this is only the tip of the iceberg. Qt's QString has more mysteries to explore and more challenges to conquer. So, are you ready for more knowledge challenges? original 2024-03-17 11:46:50 · 1028 Reading· 0 Comments -
QT5.14.2 No road blocked! Qt path operation completely solved As a Qt developer, Qt provides us with an extremely rich path operation API, enabling us to efficiently and conveniently address many path related requirements. Through Qt's powerful path API, we can freely operate files locally and remotely to efficiently and reliably meet synchronization requirements. Grasping the essence of Qt path operation, we can manipulate files and directories as we like, and create powerful, reliable and stable applications. In the future development process, you will be able to manipulate various paths with ease, and you will be able to read and write files and folders with ease. I believe that with the detailed analysis and practical guidance of this article, you will be able to grasp the essence of Qt path operation and calmly respond to any path related requirements in future development! original 2024-03-16 11:50:27 · 1057 Reading· 0 Comments -
QT5.14.2 Explore the mysterious power of QT: secret to easily obtain MD5 value In today's era of information explosion, data security has become a topic that everyone needs to pay attention to. As a widely used hash algorithm, MD5 has a wide range of application scenarios, from password storage to file integrity verification, MD5 plays an important role. In the world of QT, obtaining MD5 value is as simple as eating a cake. Today, I will take you to learn more about how to easily obtain MD5 values in QT. original 2024-03-14 18:05:50 · 711 Reading· 0 Comments -
Qt 5.14.2 Building HTTPS Downloader: A Safe and Efficient Secret Weapon Through this study, we not only learned how to build an HTTPS downloader in Qt 5.14.2, but also learned how to use the callback mechanism to handle network events. However, the world of technology is always making progress. In future versions of Qt, we may see more performance optimizations and new features. So what will we explore next time? Is it WebSockets? Or Qt for Python? Please continue to pay attention, and the answer will be announced soon! original 2024-03-14 18:02:14 · 817 Reading· 0 Comments -
QT5.14.2 Video framing: efficient combination of QT and FFmpeg Through this introduction, we learned how to use QT and FFmpeg for video framing. This technology can be applied to video editing, video analysis, video surveillance and other fields. However, video processing is a complex field, and there are many advanced technologies waiting for us to explore. In the following blog posts, I will take you to learn more about audio and video processing technology. Please wait. original 2024-03-13 21:41:41 · 598 Reading· 0 Comments -
Perfect encounter between FFmpeg and QT in the environment of QT5.14.2 VS2022 （1）、 FFmpeg introduces FFmpeg, a powerful and flexible audio and video processing library that supports almost all audio and video formats. Mastering FFmpeg means that you have taken the first step to become an expert in the field of audio and video. QT, as a cross platform C++GUI application framework, its flexibility and powerful library make it a favorite of developers. By combining FFmpeg with QT, you will be able to create beautiful and powerful audio and video applications. （2）、 FFmpeg version indicates that FFmpeg has three main version types: static library version, dynamic library version and source code. A、 Static Library Version original 2024-03-13 21:31:38 · 1283 Reading· 0 Comments -
Qt5.14.2 Easily master the compression and decompression in Qt: the mysterious veil of QuaZIP and the use of QuaZIP in practical exercises In the previous article, we introduced the compilation of QuaZIP in the Windows environment and obtained the library files.. In this article, we will continue to practice, mainly introducing the use of QuaZIP. original 2024-03-12 18:26:43 · 640 Reading· 0 Comments -
Qt5.14.2 Easily master the compression and decompression in Qt: the mysterious veil of QuaZIP and the compilation of the practical practice in the Windows environment QuaZIP is an open source library based on Qt, which provides read-write support for ZIP file format. It is simple, efficient, and easy to integrate into any Qt project. The strength behind QuaZIP comes from the zlib library, which enables it to handle various compression tasks while maintaining cross platform compatibility. What are the main functions of QuaZIP? File packaging: QuaZIP can package single or multiple files into a ZIP file, which is very useful for software distribution, data backup or transmission scenarios. File decompression: QuaZIP can also decompress ZIP files, so that users can easily extract the contents of the compressed package. Cross platform support. original 2024-03-12 16:55:45 · 1283 Reading· 0 Comments