Programmer Think

1,qt Find qt dynamic link library used in the project; The steps are as follows ① Open the windeployqt tool used by the project (qt's own tool); ② Enter the directory where the folder is located; Using the cd command ③ Use the command: windeployqt name Exe (execute the command in the directory where the target folder is located)   ...

1, Foreword Plug in development summary - creation and use of plug-ins This article shows how to use QT low API plug-in example in QT. However, this can not meet the actual scenario of large-scale applications and has no scalability. The communication between plug-ins, loading and unloading (releasing memory), plug-in metadata, plug-in lif ...

catalogue 1, Realization effect 2, Brief introduction to elements, views and scenes 1. Interrelationship 2. Header file          3. Implementation process 3, Code implementation 1. Customize an Item (element) 1.1. Create a new class myItem, which inherits from QGraphicsItem 1.2. myItem header file (. h) 1.3 overloaded constructor 1.4 ...

Notes - signals and slots Event driven model Event driven model Qt event mechanism Principle and implementation of signal and slot Principle and implementation of signal and slot QMetaObject:: activate The SLOT and SIGNAL macros will use the precompiler to convert some parameters into strings and add encoding in front. In the debugging mo ...

1, Foreword Cross platform really spent a lot of energy to start from Qt4 7 compatible to Qt6 2 and subsequent versions have lost a lot of hair, and only a few hairs are left. Hey, maybe this is the life of programmers. I have written Qt programs for so many years and prefer to support multiple Qt versions, especially for supporting any Qt ver ...

Default signals and slots case Click my button to close the windowThe description of the signal may not be found in QPushButton. You can find it from the parent class. The child class will inherit the signal of the parent class signal groove   Demonstration code //Click my button to close the window //Parameter ...

Under the mountain front bridge, there is a fool. A pupil, living in seclusion in a barren mountain. I have a group of dogs and a cat. Like programming, lack of money to do odd jobs. Mathematical history, French in mind. He can cook and wave. Statement: I'm not a professional Qt developer. The project needs a localized system scenario. Therefo ...

1, Foreword The real-time dynamic trajectory has undergone many versions of iteration. This function was originally customized by customers. It mainly needs to dynamically display the motion trajectory of GPS on the map. One application scenario is a car with monitoring. In real time, the longitude and latitude information can be received in t ...

Experimental topic Design and implementation of network chat program Experimental purpose 1. Understand Socket The principle of communication, learn to use Socket for simple network programming, and write a chat program on this basis. 2. Understand Qt programming and be familiar with C + + language. overall design 1. Background knowledge So ...

  Have you ever had time to fish In the Internet circle, it is often said that 996 work system, but there are also 965, especially 007, and 007 feels like an ICU. Therefore, everyone will sneak around and occasionally touch fish. There are many ways to fish. Have you ever fished at work? What did you do during your fishing time? If you fini ...