Programmer Think

I have been learning ffmpeg for some time. Because no one around me can ask for advice, I basically check the information on the Internet when there is a problem. I can barely finish the task by now. This paper aims to summarize, deepen understanding and facilitate review. ffmpeg used in the project mainly includes: 1. The upper computer pulls ...

catalogue Text input Focus area Text editing Key element Text input TextInput allows the user to enter a line of text. This element supports the use of regular expression validators to limit the mode settings of input and input masks. The additional attribute of KeyNavigation can preset an element id to bind the key for switching focu ...

The so-called standard dialog box is actually some dialog boxes built in Qt, such as file selection, color selection, etc. QFileDialog is a dialog used to open and save files in Qt. The previously written openAction just pops up a message dialog box to tell you that the signal slot has been connected. Now you need to write the real opening co ...

1, Briefly introduce some controls Official document: '‘ https://doc.qt.io/qtforpython/modules.html ’’’ QtWidgets: contains a complete set of UI element controls, which are used to establish an interface in line with the system styleQtGui: covers a variety of basic graphics functions, such as font, graphics, icon a ...

** introduction ** TCP/IP communication (i.e. SOCKET communication) is the communication established through TCP/IP protocol on the basis of following the four-tier architecture of ISO/OSI model by connecting the Server end of the Server and the Client end of the Client through the network cable. The controller can be set as Server or Client. ...

introduction The previous articles have made a simple summary of C + + threads, talking about multithreading in C++11 (III) - only their own powerful blog Garden (cnblogs.com). This paper focuses on the summary and implementation of Qt multithreading. Much like C++11, Qt uses QThread to manage threads. A QThread object manages a thread. There ...

introduction QMainWindow is a class that provides users with main window programs, including a menu bar, multiple tool bars, multiple dock widgets, a status bar and a central widget. It is the basis of many applications, such as text editor, picture editor, etc. (this chapter mainly introduces the menu bar and toolbar) ** 1, Menu bar ** A ...

1, Overview This project is a course design of mine. The course design requires a software that can realize the functions of Excel addition, deletion, modification and query and corresponding image addition, deletion, modification and query. Finally, it is required to be packaged into exe. Because of data confidentiality, I deleted the ...

If the article is original, please indicate the source of the original This blog address: https://hpzwl.blog.csdn.net/article/details/118713520 The complete blog of red fat man (red imitation): the collection of development technologies (including Qt practical technology, raspberry pie, 3D, OpenCV, OpenGL, ffmpeg, OSG, single chip microcompute ...

1, Foreword The original intention of writing this offline map Downloader is to facilitate several programs that need offline maps and customer needs. Since the map program can support offline maps, how to obtain these offline tile map files is the key, and this is the key to this function. Get these tile picture files one by one, Can be drawn ...