Hi,

Please, show your code and the Qt version you are using. This expression works both with QRegularExpression (which you should be using) and the deprecated QRegExp.

Hi,

What kind of application is minerd ? Also Qt ?

Do you get the same crash if you start another application like .e.g ls ?

Hi,

Can you show your .pro file ?

This is the function in cpp.

void myClass:: callBack(QByteArray ary){ QVariantList reports; reports.append("test:"); temp_report * t = ((temp_report*)(ary.data())); QString str = t->value; str.append(" $"); reports.append(str); QMetaObject::invokeMethod(qmlRootObject, "callMoneyFunction", Q_ARG(QVariant, reports)); reports.clear(); ary.clear(); }

Below is qml code

function tempCallback(value){ var str = sourceModel.get(0).value; sourceModel.remove(0) sourceModel.insert(0,{"key": "Temp: " + value[0],"value":str }); }

SourceModel is listmodel of tableview.

set data as ( utf8_general_ci ) not ( utf8_unicode_ci ) and test it

@Eeli-K sorry I have read your comment incorrectly :p

Hi SGaist,
I see you live in switzerland so I write in german.
Das Programm ist ein Testprogramm für austin mini Motorsteuerung ursprünglich von Colin Bourassa unter GPL geschrieben. Ich habe es um einige Anzeigen erweitert und möchte die Ausgabewerte auch in einem Plotfenster als Kurve ausgeben.Dazu zu jedem Wert eine checkbox.!Einschränkungen habe ich ja dadurch gemacht, das die Spinbox auf 0 stehen muß,ich könnte noch einen else Zweig hinzufügen falls keines der Kriterien erfüllt ist.Mit diesem Fehler bricht das Programm ab, wo muß ich suchen.:QCPGraph* QCustomPlot::graph(int) const index out of bounds: 3
Gerne schicke ich auch den kompletten source code.Da meine c Kenntnise nur grundlegender Natur sind komme ich nicht weiter.
Gruß
Leopold

This has been resolve which i'm using the example from https://stackoverflow.com/questions/23344370/qhttpmultipart-upload-multiple-files.

thanks

@literA2 said in Access model owned by class in QML:

@Obi-Wan i think you don't need to exposed your modelManager, you can omit that line.

You are absolutely right I think, it is only there because I'm using for something else. I'll remove it here for clarity.

@raven-worx Thanks!

I've read that page several times, but only now realized that I could use the roles this way. I had the impression that roles were more about displaying the same data in different contexts, and were not for "selecting" different data from a model. I guess I'm struggling a bit with the concept of roles. The usage doesn't quite feel coherent between Widgets and QML?

My undestanding is now that there is no problem having a QList of structs in a QAbstractListModel, I just have to give QML some kind of name to call, and then define, in the C++ data()-method, what happens when QML wants to access data using that name. The index will take care of which of the structs is being used by QML and the roles will take care of which stuct elements are returned to QML.

Thanks everyone for answer.
I am end up with write my own models, the load time reduce to 3s for 30k row and 150 col each.

@Geeva
The easies way is to move your task into its own function that expects q QList<QString> as an argument:

void myClass::myFunction(QList<QString> startvalue){ //do stuff eg: qDebug() << "Value Received from server :" << startvalue; QStringList first = startvalue.split("|"); int firstSize = first.size(); qDebug() << "size :" << firstSize; if(firstSize == 5){ first1 = first[2]; first2 = first[3]; }..........(continue) }

then you call that function for each and every item in your QList<QList<QString>>

QList<QList<QString> > myList for(QList<QString> ls : myList){ myFunction(ls); }

@Asperamanca said in How to partially draw a QGraphicsPixmapItem:

case I would not use the QGraphicsPixmapItem (not much code in it, anyway), but rather create a custom QGraphicsItem that simply paints only the portion of the p

Thanks @Asperamanca. I went that route and it was very straight forward. Performance is acceptable too.

imageitem.h

#pragma once #include <QGraphicsItem> class ImageItem : public QGraphicsItem { public: ImageItem(QGraphicsItem* parent = Q_NULLPTR); ~ImageItem(); public: void setImage(const QImage& pixmap); QRect imageRect() const; QRectF boundingRect() const; void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = Q_NULLPTR); void setSubRegion(const QRectF& rect); protected: QImage m_image; QRectF m_boundingRect; QRectF m_target; QRectF m_souce; };

imageitem.cpp

#include "imageitem.h" #include <QPainter> ImageItem::ImageItem(QGraphicsItem* parent /*= Q_NULLPTR*/) : QGraphicsItem(parent) { } ImageItem::~ImageItem() { } void ImageItem::setImage(const QImage & image) { m_image = image; m_boundingRect = m_image.rect(); } QRect ImageItem::imageRect() const { return m_image.rect(); } QRectF ImageItem::boundingRect() const { return m_boundingRect; } void ImageItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget) { Q_UNUSED(option); Q_UNUSED(widget); painter->drawImage(m_target, m_image, m_souce); } bool ImageItem::setSubRegion(const QRect & rect) { QRect imageRect = m_image.rect(); if (imageRect.contains(rect)) { m_souce = rect; m_target = QRect(0, 0, rect.width(), rect.height()); m_boundingRect = m_target; update(); return true; } else { return false; } }

@raven-worx I am not talking about multiple requestes. It's a problem with the single request.

If i send a request like that:

SsoNetworkManager::SsoNetworkManager(QObject *parent) : QNetworkAccessManager(parent) { connect(this, SIGNAL(authenticationRequired(QNetworkReply*, QAuthenticator*)), this, SLOT(onAuthenticationRequired(QNetworkReply*,QAuthenticator*))); connect(this, SIGNAL(finished(QNetworkReply*)), this, SLOT(onFinished(QNetworkReply*))); } void SsoNetworkManager::onAuthenticationRequired(QNetworkReply *reply, QAuthenticator *auth) { auth->setUser(QString("test")); auth->setPassword(QString("test")); } void SsoNetworkManager::onFinished(QNetworkReply *reply){ qDebug() << reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt(); } ... SsoNetworkManager nam; QNetworkRequest request("http://127.0.0.1:8000/admin/"); request.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true); nam.get(request); ...

The server works like that

302 and redirects to /admin/login/ 401 asking for basic auth 302 , sets cookie sessionid and redirects to /admin/ reads sessionid and replies with 200

If i follow this procedure with the browser or with python it works like a charm.
If i try this with the code above the server does't receive any cookie, they are always empty, and the client enters in a redirect loop.

I just tried to remove the QNetworkRequest::FollowRedirectsAttribute and manually handle the redirects. This way it stores the cookies, but I don't want to keep doing it manually.

To me it seems a bug

I this time removed the code:

QSettings reg("HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\.sp\\DefaultIcon", QSettings::NativeFormat); reg.setValue("Default", "C:\\Users\\Tomy\\Desktop\\Spreadsheet.ico"); SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL);

from both void MainWindow::readSettings() and void MainWindow::writeSettings() functions and added it to the MainWindow's constructor body, then re-did the rest and installed that new on my Windows.
Again, no changes in result!!
There might be a problem either in the code or the script file.

@Tony-XU
use Qt's resource system which will include it inside the built binary or place it into the apps assets folder.

@sonulohani said in QString encoding problem:

how do i convert it into the character.

what do you mean?
A "character" is just data. It just matters if you interpret it as a (Unicode-)character.
Thats why i asked how you exactly check for those "invalid" characters?

True, Qt module is an option. Then all that was needed would be Qt += mcrypto or something.

@mostefa if we go that far, QByteArray accepts an int value as constructor:

QByteArray byteArray1(61455); //or QByteArray byteArray2(0xF00F);

@blazar0112 I'm quite sure it does not require C++17.
How did you call configure?

I have found the proper solution to this problem. It's not the moc per se, it's how the generated cpp file is linked in the binary.
Anyway, without going into the ugly details, to solve this, one must simply include the generated moc_xxx.cpp file into the regular class's implementation .cpp file.
In my case I had to include moc_aedmpimessages.cpp in aedmpimessages.cpp to make it work correctly.

@vivekyuvan See http://doc.qt.io/qt-5/qwidget.html#enabled-prop

This article could be quite useful for you - Step-by-step tutorial how to create a website mockup avoiding common mistakes. Once it really helped me, when I had creating my first mockup

@PatrickK Did you try

#include <QWebEngineView>

?

Just some thoughts:

If you wish to minimise CPU usage, why do the capture at such high resolution? For supported resolutions, check QCameraImageCapture::supportedResolutions() There might not be no need to convert the image to RGB for display -- Qt should handle grayscale just well Scaling using any scaling functions may be more innefient than creating an empty target image and picking every Nth pixel for it from the source (JPEG buffer converted into QImage -- see QImage::loadFromData()) and calculating for the pixel either grayscale RGB value or indexed grayscale value from the source buffer

I know this is an old thread but I'm also very interested in the outcome.

I have a QtWidgets application which I'd like to progress to include the features from the minimal_map or mapviewer QML examples. Having never even touched QML before, I haven't even the faintest clue of where to begin.

Can Google Maps also be integrated this way, like the OSM maps?

@aha_1980 Many thanks, everything turned out. The problem was in the kernel buffer.

It works

#include <termios.h> ... void SerialTransport485::write(const QByteArray & msg) { mGPIO.writeState(GPIO::IOEnable, GPIO::Set); mPort->write(msg); mPort->flush(); int serialHandle = mPort->handle(); tcdrain(serialHandle); mGPIO.writeState(GPIO::IOEnable, GPIO::Reset); }

@SGaist said in Move to QWebEngine (Qt 5.6) to print a PDF file:

As stated before, the QtWebkit reboot might a solution.

We don't support VS2013 in 5.212.x. The only solution is to use legacy QtWebKit provided with Qt 5.9 in source form

Both qmake and cmake rely on arguments, not environment variables

I have fixed the issue:

I set this to the function:

WlanRegisterNotification(hClient, WLAN_NOTIFICATION_SOURCE_ALL, TRUE, notificationCallBack, this, NULL, &dwPrevNotif); void WINAPI WirelessConnect::notificationCallBack(PWLAN_NOTIFICATION_DATA wlanData, PVOID context) { //context = NULL; WirelessConnect *pThis = (WirelessConnect*) context; switch (wlanData->NotificationCode) { case wlan_notification_acm_connection_complete: pThis->apConnectionComplete(); qDebug() << "Connected!"; break; case wlan_notification_acm_connection_attempt_fail: pThis->apConnectionFailed(); qDebug() << "Failed!"; break; default: break; } }

Then connect it as not static instance:

connect(wirelessAPConnect, &WirelessConnect::apConnectionComplete, this, &Test::setAPConnection); connect(wirelessAPConnect, &WirelessConnect::apConnectionFailed, this, &Test::setAPConnectionFailed);

So I don't need the static global instance anymore and it works now.

@rakeshthp said in How to generate Uuid based on system MAC address:

I want to generate Uuid based on the system's MAC address using Qt. I could not find suitable example to do so. I am able to produce the mac address. Can someone guide me in order to implement this?

find MAC

QStringList m_list_mac; foreach(QNetworkInterface interface, QNetworkInterface::allInterfaces()) { // Return only the first non-loopback MAC Address if (!(interface.flags() & QNetworkInterface::IsLoopBack )&& (interface.flags() & QNetworkInterface::IsUp)) { m_list_mac.append(interface.hardwareAddress()); } }

and used for crypt QCryptographicHash
as recommended raven-worx

@segtteee Yes you can

@lordumuzca
I didn't understand precisely what and where you want some values to store, but a general approach in such cases, as I think, is to sub-class the parent you need and add suitable fields.