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This article introduces the relevant knowledge of "Qt Project Framework case study". In the operation of actual cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

I. Preface

When it comes to the project framework, also known as the code framework, it is actually very important. With the increase of programming experience, I believe that every programmer will have a project framework of his own habit, which is the same as building a house. First, build the shelf, and then fill it with content one by one. It is said that good architects are responsible for building the framework, and then arranging their people to write specific business logic code. At most, write some core algorithms, generally speaking, it takes at least 5 years of working experience to have this strength. The framework is well built and has the effect of getting twice the result with half the effort. When building the framework, we are already considering the later expansion.

I generally write the framework of Qt projects, like to use pri files for management, pri is a good thing, in fact, it is a text file, specially for classification management code files, it is suggested that you can use more, unless there is no need to use one or two code files in your project, most people may come into contact with pro files, if the number of code files is relatively large, for example, dozens of code files, all piled in pro files It looks really messy, and it is extremely inconvenient to scroll around in the project tree view to find the code file, and the eyes will look at the flowers. My project framework is generally different pri corresponding to different folders, so that the number of code files under each folder will not be too many, easy to find, clean and clean, look quite comfortable, have a comfortable mood, and write code more efficiently.

Common components are put together, such as data print and export components, mail forwarding components, SMS forwarding components, and so on.

Third-party open source components are put together, such as serial port class qextserialport, curve chart class qcustomplot, attribute control class qtpropertybrowser.

Database processing in a class dbhelper, all QSqlQuery operations are in the same class, unified management, easy to modify, do not need to write QSqlQuery everywhere.

The protocol communication of the equipment is put together deviceapi, unified management and hardware communication, alarm linkage, network forwarding and so on.

Put the sub-pages corresponding to different menus together, such as the main interface, user login and user exit interface; view interface together, including data monitoring, map monitoring, equipment monitoring, etc.; data query together, including alarm records, operation records, user records; system settings, including basic settings, port settings, device settings, map settings, etc.

Custom controls are put together in usercontrol, such as switch button controls, tree navigation controls, color drop-down box controls, and so on.

II. Functional features

Collect data port, support serial port + network port, serial port support free setting of serial number + baud rate, network support free setting of IP address + communication port, each port supports collection cycle, default one address per second, support setting communication timeout times, default 3 times, support maximum reconnection time, used to re-read offline devices.

Controller information, you can add the controller name, select the controller address + controller model, and set the number of detectors under the controller.

Detector information, can add tag, free to choose detector type, gas type, gas symbol, high reported value, low reported value, buffer value, clear zero value, whether enabled, alarm sound, background map, storage cycle, numerical conversion decimal places, alarm delay time, alarm type (HH,LL,HL) and so on.

Controller model + detector type + gas type + gas symbol, all can be configured freely.

Maps can be imported and deleted, and all detectors can be dragged and saved freely.

Port information + controller information + detector information, support import and export + export to excel+ printing.

Run record + alarm record + user record, support multi-condition combination query, such as time period + controller + detector, etc., all records can be exported to excel+ printing.

Records exported to excel support all versions of table files such as excel+wps and do not rely on software such as excel.

You can delete data within a specified time range, support automatic cleaning of early data, and set the maximum number of saved records.

Support alarm short message forwarding, support multiple receiving mobile phone numbers, you can set the sending interval, such as instant sending or sending all alarm messages once every 6 hours, the text message content is too long, automatically split multiple text messages.

Support alarm email forwarding, support multiple receiving mailboxes, can set sending interval, such as immediate sending or sending all alarm messages once every 6 hours, support attachment sending.

Overreport color + underreport color + normal color + 0 value color + curve background + curve color, etc., are free to choose.

The Chinese title + English title + logo path + copyright of the software can be set freely.

Provide switch settings for boot operation + alarm sound + automatic login + remember password and so on.

Alarm sound can be set to play the number of times, the interface provides 17 kinds of skin file selection.

Cloud data synchronization is supported, and the information of cloud database can be set, such as database name, user name + password, etc.

Support network forwarding and network reception, after the network reception is turned on, the software receives data from udp for analysis. Network forwarding supports multiple target IP, so it realizes the software of local collection, and freely transfers the data to the client to view the detector data at any time.

Automatically remember the user's last stay in the interface + other information, restart and apply automatically.

The alarm automatically switches to the corresponding map, and the detector button flashes.

Double-click the detector icon to control it back.

Support user rights management, administrator + operator two categories, user login + user exit, can remember the password and automatic login, more than three error messages and close the program.

Support four monitoring modes, equipment panel monitoring + map monitoring + table data monitoring + curve data monitoring, free to switch, four synchronous applications.

Support alarm relay linkage, a tag can link multiple modules and relay numbers across serial ports, and support many-to-many.

The local data store supports sqlite+mysql and remote data synchronization to the cloud database. Automatically reconnect.

The data collected by the local device is uploaded to the cloud in real time so that it can be extracted by other methods such as APP or web.

Two kinds of data sources are supported, one is serial port and network to collect equipment data through protocol, the other is database collection. The database acquisition mode can be used as a general system.

Comes with a device simulation tool that supports 16 device data simulations, as well as database data simulations to test data when there is no device.

The default communication protocol uses modbus protocol, and later increases the support of mqtt and other Internet of things protocols to make a general system.

Supports all windows operating systems + linux operating systems and other operating systems.

Third, effect picture

IV. Core code pro file INCLUDEPATH + = $$PWD/frmmainINCLUDEPATH + = $$PWD/frmviewINCLUDEPATH + = $$PWD/frmdataINCLUDEPATH + = $$PWD/frmotherINCLUDEPATH + = $$PWD/frmconfigINCLUDEPATH + = $$PWDINCLUDEPATH + = $$PWD/apiINCLUDEPATH + = $$PWD/dbapiINCLUDEPATH + = $$PWD/dataoutINCLUDEPATH + = $$PWD/sendmsgINCLUDEPATH + = $$PWD/sendemailINCLUDEPATH + = $$PWD/deviceapiINCLUDEPATH + = $PWD/usercontrolINCLUDEPATH + = $$PWD/qcustomplotINCLUDEPATH + = $$PWD/qextserialportINCLUDEPATH + = $$PWD/qtpropertybrowserinclude ($PWD/frmmain/frmmain.pri) include ($$PWD/frmview/frmview.pri) include ($PWD/frmdata/frmdata.pri) include ($$PWD/frmother/frmother.pri) include ($$PWD/frmconfig/frmconfig.pri) include ($$PWD/api/api.pri) include ($$PWD/dbapi / dbapi.pri) include ($PWD/dataout/dataout.pri) include ($PWD/sendmsg/sendmsg.pri) include ($PWD/sendemail/sendemail.pri) include ($PWD/deviceapi/deviceapi.pri) include ($PWD/usercontrol/usercontrol.pri) include ($PWD/qcustomplot/qcustomplot.pri) include ($PWD/qextserialport/qextserialport.pri) include ($$PWD/qtpropertybrowser/qtpropertybrowser.pri) pri file FORMS + =\ $$PWD/frmview.ui\ $PWD/frmviewdata.ui\ $PWD/frmviewdevice.ui\ $PWD/frmviewmap.ui\ $PWD/frmviewplot.uiHEADERS + =\ $PWD/frmview.h\ $PWD/frmviewdata.h\ $PWD/frmviewdevice.h\ $PWD/frmviewmap.h\ $PWD/frmviewplot.hSOURCES + =\ $$PWD/frmview.cpp\ $PWD/frmviewdata.cpp\ $PWD / frmviewdevice.cpp\ $$PWD/frmviewmap.cpp\ $$PWD/frmviewplot.cpp "Qt Project Framework case study" ends here Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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