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This article mainly explains "Qt how to achieve the device double-click effect", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "Qt how to achieve the device double-click effect" bar!

I. Preface

In the process of writing this project, a small feature praised by customers is double-click on the device button, double-click to reconnect the device when offline, and double-click to pop up the specific details interface, return control device, parameter settings and so on when online. In the communication process of the modbus device, the timeout number is set. If the device of the node is connected (remember it is connected, if the first time does not return, the second time does not return, the third time returns, the count variable should be reset instead of a total of 3 times), if the returned data is not received for more than 3 times (which can be set), it is considered offline, and the device can be skipped automatically during the next poll, which can greatly speed up the speed of rotation training. In many devices, it is inevitable that some of the lines are blocked, so that the system automatically filters out this part of the equipment, and the real-time online equipment can be trained in rotation, but it can not keep him from training in rotation all the time. What if he resumes the line and repairs it? so we also need a field to store the offline reconnection time, and at that time, we will retrain all the offline equipment again to see if he is in it. If you are not here, you have to wait until the next offline reconnection time. If you want to speed up, you can double-click on the button of the offline device and take the initiative to have a rotation training.

Because the information that the device button can display is limited, for example, it generally shows the current value plus a unit, so if you need to view more information about the detector node, double-click to open the device details interface, in which you can see the specific number, tag, detector, controller name, and the like of the device. You can also control the device to set parameters. When sending back control data, it is necessary to suspend the rotation training. generally speaking, if you use 485 bus communication, half-duplex, you can not receive data when sending, otherwise it will be washed out.

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

Core code # include "frmview.h" # include "ui_frmview.h" # include "quiwidget.h" # include "dbhelper.h" # include "iconfont.h" # include "deviceserver.h" # include "devicehelper.h" # include "alarmlink.h" # include "soundapi.h" # include "deviceserver.h" # include "frmviewdevice.h" # include "frmviewmap.h" # include "frmviewdata.h" # include "frmviewplot.h" # include "frmdevicecontrol.h" frmView::frmView (QWidget * parent): QWidget (parent) Ui (new Ui::frmView) {ui- > setupUi (this) This- > initForm (); this- > initControl (); QTimer::singleShot (1000, this, SLOT (initServer ());} frmView::~frmView () {delete ui;} void frmView::initForm () {ui- > navTitleTable- > setText ("Police Intelligence"); ui- > navTitleTable- > setLeftIcon (0xf108); ui- > navTitleTable- > setRightIcon4 (0xf1f7); ui- > navTitleTable- > setRightIcon5 (0xf1f8); ui- > navTitleTree- > setText ("device list") Ui- > navTitleTree- > setLeftIcon (0xf0e8); ui- > navTitleTree- > setRightIcon5 (0xf021); ui- > navTitleList- > setText ("Map list"); ui- > navTitleList- > setLeftIcon (0xf0e8); ui- > navTitleList- > setRightIcon5 (0xf021); ui- > widgetLeft- > setFixedWidth (App::LeftWidth); ui- > widgetRight- > setFixedWidth (App::RightWidth); connect (ui- > navTitleTable, SIGNAL (mousePressed (int)), this, SLOT (mousePressed (mousePressed)) Connect (AppEvent::Instance (), SIGNAL (doubleClicked (ButtonDefence *)), this, SLOT (doubleClicked (ButtonDefence *)); frmViewDevice * viewDevice = new frmViewDevice; ui- > stackedWidget- > addWidget (viewDevice); frmViewMap * viewMap = new frmViewMap; ui- > stackedWidget- > addWidget (viewMap); frmViewData * viewData = new frmViewData; ui- > stackedWidget- > addWidget (viewData); frmViewPlot * viewPlot = new frmViewPlot; ui- > stackedWidget- > addWidget (viewPlot) Connect (this, SIGNAL (itemClicked (QString)), viewDevice, SLOT (itemClicked (QString)); connect (DeviceServer::Instance (), SIGNAL (receiveAlarm (QString, QString, quint8)), this, SLOT (receiveAlarm (QString, QString, quint8)); DeviceHelper::setTableData (viewData- > getTable ()); DeviceHelper::setTableWidget (ui- > tableWidget); DeviceHelper::setTreeWidget (ui- > treeWidget); DeviceHelper::setListWidget (ui- > listWidget); DeviceHelper::setPanelWidget (viewDevice- > viewDevice- ()) DeviceHelper::setLabel (viewMap- > getLabel ());} void frmView::initTree () {DeviceHelper::initDeviceTree (); DeviceHelper::initDeviceStyle ();} void frmView::initControl () {DeviceHelper::initDeviceData (); DeviceHelper::initDeviceTable (); DeviceHelper::initDeviceTree (); DeviceHelper::initDeviceMap (); DeviceHelper::initDevicePanel (); DeviceHelper::initDeviceButton () If (ui- > listWidget- > count () > 0) {ui- > listWidget- > setCurrentRow (0); on_listWidget_pressed ();}} void frmView::initServer () {/ / start device parsing DeviceServer::Instance ()-> init (); DeviceServer::Instance ()-> start () } void frmView::mousePressed (int index) {if (index = = 5) {/ / change the sound icon and stop the alarm sound ui- > navTitleTable- > setRightIcon4 (0xf1f7); SoundAPI::Instance ()-> stop (); if (App::WorkMode = = 0) {AlarmLink::Instance ()-> reset () }} else if (index = = 6) {/ / clear temporary message DeviceHelper::clearMsg () }} void frmView::doubleClicked (ButtonDefence * btn) {if (App::CurrentUserType.contains ("administrator")) {if (btn- > getButtonStatus () = = ButtonDefence::ButtonStatus_Error) {/ / double-click to reconnect all devices under the current port QString portName = DBHelper::getPortName (btn- > property ("deviceName"). ToString (); DeviceServer::Instance ()-> readValue (portName, 255, true) } else {/ / popup details QString positionID = btn- > property ("positionID"). ToString (); frmDeviceControl::Instance ()-> setPositionID (positionID); frmDeviceControl::Instance ()-> show ();} void frmView::on_listWidget_pressed () {int row = ui- > listWidget- > currentRow (); if (row)

Parent ()! = 0) {emit itemClicked (item- > text (column));}} void frmView::setIndex (int index) {ui- > stackedWidget- > setCurrentIndex (index); bool visible = (index = = 0 | index = = 2); ui- > widgetLeft- > setVisible (! (index = = 3)); ui- > widgetRight- > setVisible (! (index = = 3)); ui- > navTitleTree- > setVisible (visible); ui- > treeWidget- > setVisible (visible); ui- > navTitleList- > setVisible (! visible) Ui- > listWidget- > setVisible (! visible);} void frmView::receiveAlarm (const QString & deviceName, const QString & positionID, quint8 alarmType) {if (alarmType = = 0 | | alarmType = = 2) {ui- > navTitleTable- > setRightIcon4 (0xf0a2);} else {ui- > navTitleTable- > setRightIcon4 (0xf1f7) }} Thank you for your reading. the above is the content of "how to achieve the double-click effect of the device with Qt". After the study of this article, I believe you have a deeper understanding of how to achieve the double-click effect of the device with Qt, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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