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1, Foreword The premise of the regional contour map is how to get the js files of these contours. In fact, the json data of the contours of provinces and cities can be found on the network. The corresponding contents of these json data are similar to those of various boundaries@@ CGIUCACAAAAA@Q @Characters. Each paragraph of this character rep ...

git source code portal Basic description The basic principle of mjpeg server is to send pictures to the client one by one, and then the client is like playing animation, but it is still pictures. The image tag of the browser can directly access the image stream of the service through the http protocol. It looks like the image tag has the fu ...

Experience of adapting vtk window to touch screen with Qt The recent work arrangement is to adapt vtk's touch screen operation. After reading some source code, I share my current methods here. This article is my own idea, only for reference, may be completely wrong.!!! If there are other elegant ways, please correct. original text Experienc ...

QWebEngine architecture based on Widget Through this article, you can roughly understand several key classes of QWebEngine framework based on Widget. As can be seen from the above figure, it presents a tree structure from top to bottom. QWebEngineView A web view is the main widget component of the Qt WebEngine web browsing module. I ...

catalogue 1, Event loop for Qt 2, QCoreApplication main event loop 3, Start of event cycle 4, processEvents 5, QEventLoop class 6, Nesting of event loop and Simulation of synchronous call by QEventLoop 1. Get data synchronously 2. Main thread waiting 3. The dialog box pops up 1, Event loop for Qt As a cross platform UI framework, ...

QSS (Qt Style Sheets), or Qt style sheets, is a mechanism used to customize the appearance of controls. QSS refers to a lot of CSS content, but the function of QSS is much weaker than CSS, which is reflected in less selectors and less QSS properties that can be used, and not all properties can be applied to PyQt controls. QSS separates page bea ...

preface QT provides two classes for drawing. Here is a brief introduction to the differences between them (QPainter and GraphicsView). QPainter means brush in English, and this class is painting on a plane. The picture drawn cannot be changed later. The general place to use is to make some cool controls without making major changes later; ...

We wrote an article before Using Qt ScrollBar to realize scrolling screen time selector I also wrote an article QComboBox custom settings - the drop-down list is customized as a table Today, we will use the previous two articles to implement a time range selection control. First, let's look at the effect. After seeing the effect, we decompo ...

PyQt5 is still used this time to create a time management tool, which supports the display of two time formats, full screen, window switching and some personalized settings. It can be used as a timer or screen saver. 1, Preparatory work 1.PyQt5 pyqt5 is a framework for Python binding Digia QT5 applications. It can be used with Pytho ...

Qt is born in Linux and developed from Linux. Therefore, many Qt programmers often use Linux as their development environment, such as commonly used ubuntu and other systems, and sort out some commonly used linux commands. commandfunctionsudo -sSwitch to the administrator. If it is sudo -i, the current directory will be changed after switching ...