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How to download or keep json from the file to QTable (Qt) table?

Z
zymir last edited by
Got a file. trip.jsonFor example
```
{
    "name": "Hawai",
    "days": 25
}
```
How can this file download/ store information in/from the table QTableView?
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J
juvenalb last edited by

♪ QTableView You can set for display. QAbstractItemModel(or her heir, in your case, fits-- QStandardItemModelSo you need to create your model, the heir of one of these classes, to fill it out. .json The file, and display it in the table by void QTableView::setModel(QAbstractItemModel * model).
That is, both in the laboratory and usually in Qt, the logic of completing the model will be in a separate class.
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The problem is that you're just trying to add something in the vector without saying what. Need to pass a type object bunny for the method for it to make addition:bunnies.push_back(bunny()); See https://ideone.com/y5kB1U . And https://repl.it/join/apgpcihx-maniero . Also https://github.com/maniero/SOpt/blob/master/CPP/Vector/PushBack2.cpp .
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recv from - blocking function (Vindows OC) https://docs.microsoft.com/en-us/windows/desktop/api/winsock/nf-winsock-recvfrom ♪ ♪ ♪if no incoming data is available at the socket, the recv from function blocks and waits for data to arrive according to the blocking rules defined for WSARecv with the MSG_PARTIAL flag not set unless the socket is nonblocking. In this case, a value of SOCKET_ERROR is returned with the error code set to WSAEWOULDBLOCK. The select, WSAAsyncSelect, or WSAEventSelect can be used to determine when more data arrives.♪ ♪ ♪Try using asynchronous operations. WSA2: https://docs.microsoft.com/en-us/windows/desktop/api/winsock2/nf-winsock2-wsarecv std:async does not guarantee compliance in a single flow and contains a lot of restrictions on asynchronous launch, and it's quite natural that you have all the flow.
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Transform the symbol into the number it represents:sum += userString.at(i) - '0'; I wouldn't use it. at - Why do you have to check outside the line? ♪ ♪for (auto c: userString) if (isdigit(c)) sum += c - '0'; And also, take into account that >> string reading the word, not the whole line.
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Thanks to those who have been looking and thinking, but I publish my solution. I've been quite blind, it was a simple mistake.Corrected code:#include <iostream> #include <cabecera.h> using namespace std; int main() { PunteroArray array; crearArray(array); inicializarArray(array); escribirArray(array); return 0; } void crearArray(PunteroArray& ar) { PunteroArray* p = new PunteroArray; //aquí estaba el error p=&ar;//asignar la direccion de nuestra estructura a la memdin } void inicializarArray(PunteroArray& ar) { for(int i=0; i<1000;i++) { ar.a[i]=i+1; } } void escribirArray(PunteroArray &ar) { for(int i=0; i<1000; i++) { cout<<"dato:"<<ar.a[i]<<"\n"; } } It simply had to assign dynamic memory with another PunteroArray type pointer, and assign to this the address of our Puntero structure to array.Here the header with the struct statement:#ifndef CABECERA_H #define CABECERA_H struct PunteroArray { int a[1000]; int* b=a; //no llego a entender la necesidad de este puntero si no he llegado a usarlo para resolver el problema }; void crearArray(PunteroArray& ar); void inicializarArray(PunteroArray& ar); void escribirArray(PunteroArray& ar); #endif // CABECERA_H Thank you.
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download a file with javascript
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What you need is to make the browser go to the url you want to download ... that you get it with instruction location.href de Javascript, assigning the value of the url you want to download.Here is an example:$(function () { function downloadLink(id) { var ajaxOptions = { url: 'http://httpbin.org/status/' + id }; var res = $.ajax(ajaxOptions); function onAjaxDone(data) { location.href = 'http://httpbin.org/bytes/1024'; } function onAjaxFail() { alert('Bad ID'); } res .done(onAjaxDone) .fail(onAjaxFail) ; } function onDownloadLinkClick(e) { e.preventDefault(); var $this = $(this); var id = $this.data('id'); downloadLink(id); } $('.download-link').on('click', onDownloadLinkClick); });.download-link { text-decoration: none; border: 1px solid #ccc; padding: .5em; font-family: Helvetica; color: #c00; display: block; text-align: center; margin: 1em 0; }<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <a href="#" data-id="200" class="download-link">Good ID</a> <a href="#" data-id="400" class="download-link">Bad ID</a>Good luck and greetings!
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For Ability getAbility() must be Ability& getAbility()♪If the reference is not returned, the meaning is then Cutcreating a new Ability facility that has no body function fight()♪The compiler's idea is to make a mistake, "the man to create an abstract object," but somehow he doesn't, and instead, there's a blade error.
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Try pdf to use the type application/octet-stream♪
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Use the best. async/future (c++11):#include <iostream> #include <future> int scanFile() { //обработка массива return 1; } int main() { std::future<int> r0 = std::async(scanFile); std::future<int> r1 = std::async(scanFile); int sum = r0.get() + r1.get(); // нужно получить общую сумму std::cout << sum << std::endl; }
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Well, it's clearly written:Definition #define SHOW_NO_PASSWORD_WARNING 0 In line 53 x11vnc-veyon.c duplicates the definition#define SHOW_NO_PASSWORD_WARNING 0 In line 1919 x11vnc.c. Why is it that the answer is quite obvious: it's wrong to makefile. Well, or the project file is wrong if you work in some IDE. What kind of project is that? Who was it?It's like two. different The project's been glued into one, or somewhere you''ve got a hit at the Wifdef.
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You can order download by JS is very simpleCode JavaScriptfunction saveAs(url) { var filename = url.substring(url.lastIndexOf("/") + 1).split("?")[0]; var xhr = new XMLHttpRequest(); xhr.responseType = 'blob'; xhr.onload = function() { var a = document.createElement('a'); a.href = window.URL.createObjectURL(xhr.response); a.download = filename; a.style.display = 'none'; document.body.appendChild(a); a.click(); delete a; }; xhr.open('GET', url); xhr.send(); } And here, to download the file. <a href="javascript:" onclick="saveAs(<?php print base_url(); ?>web_files/uploads/radio/<?php echo $audios->audio; ?>)"><?php echo $audios->nome; ?></a> If it doesn't work.
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Graphics - it's a graphic context, you can't keep it. The battle/majj that is being created in this context remains.Example http://www.exampledepot.com/egs/javax.imageio/Graphic2File.html
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Well, for example, foo_wrapper.cpp:#include <foo.hpp> #define main this_is_not_main #include "foo.cpp"
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The objective is divided into two parts:Get a click on the button. WebView ♪ https://www.tutorialspoint.com/how-to-detect-click-on-html-button-through-javascript-in-android-webview In interception, initiate a search/selection from the file system. It's still easier here. If the Android der=6.0 version is blunt Intent.ACTION_OPEN_DOCUMENTindicating the right mimetypeIf the Android KitKat version lower, it's gonna be a little harder. For example https://github.com/iPaulPro/aFileChooser
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A specific class should not have any abstract member function, i.e. redefining them all.print and area You've changed, and volume You stayed abstract, which means yours. Circle - too abstract, and you can't work directly with him.
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I recommend that we use it to roll. DownloadManager https://developer.android.com/reference/android/app/DownloadManager ♪ It can be designed so that a notice of downloading of the file can be displayed and that it fits for your purposes, turns up the download.Got it. DownloadManager May:((DownloadManager) context.getSystemService(DOWNLOAD_SERVICE)) Example of userequest - Your request:Request request = DownloadManager.Request(Uri.parse("твой URL")) //Устанавливаем уведомление, которое будет отображать процесс загрузки .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED) .setTitle("твое название файла") //папка назначения куда скачается файл .setDestinationInExternalFilesDir( context, Environment.DIRECTORY_DOWNLOADS, fileName + fileExtension ) //Складываем твой запрос в очередь для скачивания downloadManager.enqueue(request)

How to download or keep json from the file to QTable (Qt) table?

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