QT compile 45 graphic report of security video monitoring system

One 、 Preface

The graphic report corresponds to the previous text report , After previous log query , Need to print or export , It's all written records line by line , In the near future, graphic alarm records need to be printed and exported , So I took the opportunity to import and export the previous data (xls/pdf) And print components , This is also a legacy component that needs to be re architected , Deleted 60% Redundant code for , The parameter of structure storing and exporting print data is added , Made a general static function export and print , Very convenient , At the same time, it also expands the data export and printing support of graphic alarm , Support incoming picture path , Customize the main title, subtitle, etc . In the whole process of transformation , Summed up a few little experience .

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• Function with return value , Be sure to take the initiative return Return value , Some compilers can compile normally without return value , But there will be problems when running , You don't get the results you want , Because no return Corresponding value .
• Defined local variables , Actively give an initial value , It's a good habit that must be formed , Otherwise, the initial value given by the compiler may not be what you want , such as int Variable default 0, Sometimes it becomes a large value at random ,bool The initial value of the variable is different, and the compiler has different values , Some are true Some are false, It is more reliable to actively give an initial value .
• Some functions have many arguments , And it may be modified and added later , This leads to the source modification , The associated signal slot shall also be modified , The parameter type and location must be exactly the same , The corresponding slot function processing also needs to be modified , The workload of changes is very heavy and very unfriendly , So for functions with non fixed parameters , It is recommended to use structure , It's very easy to add other parameters , Moreover, there is no need to modify the signal slot Association and signal slot function definition , For example, student information form 、 The commodity information table is transmitted as a parameter , The best solution is the structure .
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Functions and features of graphic reports

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2. Original export data mechanism , Do not rely on any office Third party libraries such as components or operating systems , In particular, it supports embedded linux.
3. 10 Ten thousand rows of data 9 Fields only need 2 Seconds to complete .
4. It only takes four steps to start exporting a large amount of data to Excel.
5. At the same time, it provides direct write data interface and multithread write data interface , The main interface is not stuck .
6. You can set the title 、 Subtitle 、 Table name .
7. You can set the field name 、 Column width .
8. You can set whether to enable the verification and filtering data 、 Check Columns 、 Validation rules 、 Check value , Special color display in accordance with the rules .
9. You can set random background color and column set that needs random background color .
10. Support group output data , For example, output data by device group , Convenient view .
11. Customizable line content separator .
12. Data can be written in the form of additional data , It is suggested that the additional data should be less than 10000 strip .
13. Super flexibility , Free to change the source set alignment 、 Text color 、 Background color, etc .
14. Support any excel Form software , Including but not limited to excel2003/2007/2010/2013/2017/wps/openoffice etc. .
15. In addition to providing export to Excel Outside class , Export to is also provided Pdf Files and classes for printing data .
16. The notes are perfect , Detailed and complete use demo, Support QTableWidget、QTableView、 Database three kinds of data sources .
17. pure Qt To write , Support any Qt edition + Any compiler + Any system .
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Two 、 Functional characteristics

（ One ） Software modules

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2. Video monitoring module , All kinds of small window body sub modules , Including a list of devices 、 Picture and text police information 、 Window information 、 Pan tilt control 、 Preset position 、 Cruise settings 、 Equipment control 、 Floating map 、 Web browsing, etc .
3. Video playback module , Including local playback 、 Remote playback 、 Device playback 、 Picture playback 、 Video upload, etc .
4. Electronic map module , Including pictures, maps 、 Online map 、 offline map 、 Path planning, etc .
5. Log query module , Including local logs 、 Device logs, etc .
6. System setup module , Including system settings （ Basic settings 、 Video parameters 、 Database settings 、 Map configuration 、 Serial port configuration, etc ）、 VCR Management 、 Camera Management 、 Polling configuration 、 User management, etc .
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（ Two ） Basic function

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2. Supports various video streams （rtsp、rtmp、http etc. ）、 Video file （mp4、rmvb、avi etc. ）、 Local USB The camera plays .
3. Support multi screen switching , Include 1、4、6、8、9、13、16、25、36、64 Screen switching .
4. Support full screen switching , A variety of switching methods, including the right mouse button menu 、 toolbar button 、 Shortcut key （alt+enter Full screen ,esc Exit full screen ）.
5. Support video polling , Include 1、4、9、16 Screen polling , Polling groups can be set （ Polling plan ）、 Polling interval 、 Stream type, etc .
6. Support onvif agreement , Including device search 、 Pan tilt control 、 Equipment control （ Picture parameters 、 Proofreading time 、 System restart , Capture pictures, etc ）.
7. Support rights management , Different users can have different module permissions , Like deleting logs 、 Shut down the system, etc .
8. The database supports a variety of , Include sqlite、mysql、sqlserver、postgresql、oracle、 People's Congress, Jincang, etc .
9. Local USB The camera supports setting resolution 、 Frame rate and other parameters .
10. All docking modules automatically generate corresponding menus to control display and hide , Right click in the title bar to pop up .
11. Support to display all modules 、 Hide all modules 、 Reset normal layout 、 Reset full screen layout .
12. Double click the device to pop up the real-time preview video , Support image map 、 Online map 、 Offline maps, etc .
13. Drag the camera node to the corresponding window to play video , At the same time, it supports dragging local files to play directly .
14. Delete video support right mouse button delete 、 Floating bar close delete 、 Drag it outside the video monitoring panel to delete it .
15. The device button on the picture map can be dragged freely , Automatically save location information . Baidu map can click the mouse to obtain longitude and latitude information , Used to update device location .
16. Any channel in the form of video monitoring panel supports drag and drop switching , Instant response .
17. It encapsulates Baidu map , views switching , path of particle , Equipment points , Click the mouse to get the latitude and longitude .
18. Double click the node 、 Drag nodes 、 Drag the form, swap the position, etc , Automatically update and save the last playback address , Next time the software opens the automatic application .
19. Lower right volume bar control , Lose focus auto hide , Volume bar mute icon .
20. Support video capture , You can specify a single or all channel screenshot , There's also a screenshot button on the bottom toolbar .
21. Support timeout auto hide mouse pointer 、 Automatic full screen mechanism .
22. Support onvif Pan tilt control , The camera can be moved up and down , Including reset and focus adjustment .
23. Support any onvif The camera , Including but not limited to Haikang 、 Dahua 、 Depending Yu 、 The great cause of heaven and earth 、 HUAWEI, etc. .
24. Can save video , It can be stored in a fixed time or in a single file , Optional storage interval time .
25. Video stream communication mode can be set tcp+udp, Video decoding can be set to speed first 、 Quality first 、 Equilibrium, etc .
26. Chinese name of software can be set 、 English name 、LOGO Icon, etc .
27. The stored video files can be exported to the specified directory , Support batch upload to the server .
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（ 3、 ... and ） Special function

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2. The main interface adopts the docking form mode , Various components are added in the form of small modules , You can customize any module to add .
3. Docking module can drag any position to embed and suspend , Support maximum full screen , Support multi screen .
4. Dual layout file storage mechanism , Normal mode 、 Full screen mode corresponds to different layout schemes , Auto switch and save , For example, in full screen mode, several modules can be highlighted and displayed transparently in designated positions , More sci-fi, modern .
5. original onvif Protocol mechanism , Using the underlying protocol analysis （udp Radio search +http Request to execute command ） It's lighter, easier to understand, easier to learn and expand , It doesn't rely on any third-party components, such as gsoap.
6. Original data import and export mechanism , Cross platform does not rely on any components , Export data instantaneously .
7. Built in multiple original components , The universe is worth a lot , Including data import and export components （ Export to xls、pdf、 Print ）、 Database components （ Database management thread 、 Automatically clean up data threads 、 Universal paging 、 Data request, etc ）、 Map components 、 Video surveillance components 、 File multithreading transceiver component 、onvif Communication components 、 General browser kernel components, etc .
8. Custom message box + Error box + Inquiry frame + Prompt box in the lower right corner （ Contains multiple formats ） etc. .
9. Beautiful skin change , the height is 17 Change the skin style at will , All styles are unified , Including menu, etc .
10. Video control suspension bar can add multiple buttons by itself , Buttons can also be added to the small toolbar at the bottom of the monitoring interface .
11. Double click the camera node to automatically play the video , Double click the node to automatically add videos one by one , Will automatically jump to the next , Double click the parent node to automatically add all videos under the node . Optional main stream 、 Sub-stream .
12. VCR Management 、 Camera Management , You can add, delete, modify, import, export and print information , Apply the new device information to generate the tree list immediately , No need to restart .
13. Multiple kernels can be selected to switch freely ,ffmpeg、vlc、mpv etc. , Can be found in pro Set in . Recommend to use ffmpeg, Cross platform is the most , By default linux and mac Compiled libraries on the platform .
14. Support hard decoding , Hard decoding type can be set （qsv、dxva2、d3d11va etc. ）.
15. By default opengl Drawing video , Ultra low CPU Resource occupation , Support yuyv and nv12 Two formats to draw , It's awesome .
16. Highly customizable , Users can easily derive their own functions on this basis , For example, add a custom module , Add operation mode 、 Robot monitoring 、 Drone monitoring 、 Excavator monitoring, etc .
17. Support xp、win7、win10、linux、mac、 All kinds of domestic systems （UOS、 Winning Qilin 、 Galaxy unicorn, etc ）、 The embedded linux Such as system .
18. Note complete , The project structure is clear , Super detailed complete use of the development manual , Accurate to the function description of each code file , Keep iterating over versions .
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3、 ... and 、 Experience address

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2. Experience address ：​ ​https://pan.baidu.com/s/1d7TH_GEYl5nOecuNlWJJ7g​​ Extraction code ：01jf file name ：bin_video_system.zip.
3. Domestic site ：​ ​https://gitee.com/feiyangqingyun​​
4. International sites ：​ ​https://github.com/feiyangqingyun​​
5. Zhihu Homepage ：​ ​https://www.zhihu.com/people/feiyangqingyun/​​
   
6. Online document ：​ ​https://feiyangqingyun.gitee.io/qwidgetdemo/video_system/​​
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Four 、 design sketch

5、 ... and 、 Core code

Log in and copy

       

        #include "datacreat.h"
        

        
void DataCreat::creatUavsReportHead(QStringList &list, const UavsReportData &reportData)
        
{
        
    // Form start 
        
    list << "<table border='0.0' cellspacing='0' cellpadding='6'>";
        

        
    // title 
        
    list << "<tr>";
        
    list << QString("<td width='100%' align='center' style='font-size:22px;font-weight:bold;' colspan='%1'>%2</td>").arg(2).arg(reportData.title);
        
    list << "</tr>";
        

        
    // Horizontal lines or line breaks 
        
    list << "<hr>";
        
    //list << "<br>";
        

        
    // Current module common style 
        
    QString style = "style='font-size:18px;'";
        

        
    // Equipment name 
        
    QString name = QString(" Equipment name : %1").arg(reportData.name);
        
    list << "<tr>";
        
    list << QString("<td colspan='%1' %2>%3</td>").arg(2).arg(style).arg(name);
        
    list << "</tr>";
        

        
    // Latitude and longitude 
        
    QString lng = QString(" Equipment longitude : %1").arg(reportData.lng);
        
    QString lat = QString(" Equipment latitude : %1").arg(reportData.lat);
        
    list << "<tr>";
        
    list << QString("<td %1>%2</td>").arg(style).arg(lng);
        
    list << QString("<td %1>%2</td>").arg(style).arg(lat);
        
    list << "</tr>";
        

        
    // Alarm date + Reporting time 
        
    QString timeAlarm = QString(" Alarm date : %1").arg(reportData.timeAlarm);
        
    QString timeReport = QString(" Reporting time : %1").arg(reportData.timeReport);
        
    list << "<tr>";
        
    list << QString("<td %1>%2</td>").arg(style).arg(timeAlarm);
        
    list << QString("<td %1>%2</td>").arg(style).arg(timeReport);
        
    list << "</tr>";
        

        
    // End of form 
        
    list << "</table>";
        
}
        

        
void DataCreat::creatUavsReportBody(QStringList &list, const UavsReportData &reportData, int imageWidth)
        
{
        
    // Line break 
        
    list << "<br><br>";
        

        
    // Form start 
        
    list << "<table border='0.5' cellspacing='0' cellpadding='5'>";
        

        
    // title 
        
    list << "<tr>";
        
    list << QString("<td width='100%' align='center' style='font-size:20px;font-weight:bold;' colspan='%1'>%2</td>").arg(2).arg(reportData.subTitle);
        
    list << "</tr>";
        

        
    // Current module common style 
        
    QString style = "style='font-size:18px;'";
        

        
    // Alarm type 
        
    QString type = QString(" Alarm type : %1").arg(reportData.type);
        
    list << "<tr>";
        
    list << QString("<td width='100%' colspan='%1' %2>%3</td>").arg(2).arg(style).arg(type);
        
    list << "</tr>";
        

        
    // Target number + Threat level 
        
    QString textCount = QString(" Target number : %1").arg(reportData.textCount);
        
    QString textLevel = QString(" Threat level : %1").arg(reportData.textLevel);
        
    list << "<tr>";
        
    list << QString("<td %1>%2</td>").arg(style).arg(textCount);
        
    list << QString("<td %1>%2</td>").arg(style).arg(textLevel);
        
    list << "</tr>";
        

        
    // Image queue 
        
    QStringList listImage = reportData.images;
        
    int count = listImage.count();
        

        
    // Alarm image 
        
    QString text = QString(" Alarm image  (  common  %1  Zhang  )").arg(count);
        
    list << "<tr>";
        
    list << QString("<td width='100%' align='center' style='font-size:20px;font-weight:bold;' colspan='%1'>%2</td>").arg(2).arg(text);
        
    list << "</tr>";
        

        
    // Calculate the drawing area size , First zoom the image to the appropriate size and save it locally 
        
    QString path = qApp->applicationDirPath() + "/snap/";
        
    for (int i = 0; i < count; ++i) {
        
        QImage image(listImage.at(i));
        
        if (image.width() > imageWidth) {
        
            QString name = path + QString("%1.jpg").arg(i + 1);
        
            image = image.scaled(imageWidth, image.height(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
        
            image.save(name, "jpg");
        
            listImage[i] = name;
        
        }
        
    }
        

        
    //qDebug() << listImage;
        
    // Vertical center 
        
    style = "style='vertical-align:middle;'";
        
    for (int i = 0; i < count; i = i + 2) {
        
        list << "<tr>";
        
        list << QString("<td align='center' %1><img src='%2'></td>").arg(style).arg(listImage.at(i));
        
        // Need to filter and judge , It is likely that the odd number will exceed the next 
        
        if (i < count - 1) {
        
            list << QString("<td align='center' %1><img src='%2'></td>").arg(style).arg(listImage.at(i + 1));
        
        }
        
        list << "</tr>";
        
    }
        

        
    // End of form 
        
    list << "</table>";
        
}
       
       

        
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