How to convert QByteArray QImage?

Similar Questions

• Convert QByteArray QImage

  Hi all

  Is it possible to convert QByteArray QImage?

  Answer please!

  See you soon!

  use the registration method.

  example of http://qt-project.org/doc/qt-4.8/qimage.html#save-2

  QImage image;
  QByteArray ba;
  QBuffer buffer(&ba);
  buffer.open(QIODevice::WriteOnly);
  image.save(&buffer, "PNG"); // writes image into ba in PNG format
  

• Nfc_ndef_record_t convert QByteArray HowTo

  in one of my applications, I use NFC with custom instead of the record to the text file Type to be able to invoke my app since the NFC Tag directly.

  Also, within my application, there is a feature allowing the user to write these Tags NFC

  I would like to use an InvokeActionItem to use the sys. NFCViewer - I love the beautiful UI of it.

  For my text NFC files, it works well.

  Here's the InvokeActionItem:

         InvokeActionItem {
              imageSource: "asset:///images/ic_add.png"
              title: qsTr("NFC Tag Text")
              enabled: nfcActionSelector.selectedValue > 0
              ActionBar.placement: ActionBarPlacement.OnBar
              query {
                  mimeType: "application/vnd.rim.nfc.ndef"
                  invokeTargetId: "sys.NFCViewer"
                  invokeActionId: "bb.action.SHARE"
              }
              handler: InvokeHandler {
                  id: shareHandler
                  onInvoking: {
                      tagWriteAction.data = app.getNdefTextMessage("en", nfcText);
                      shareHandler.confirm();
                  }
              }
          }
  

  This works well using a QByteArray:

  QByteArray ApplicationUI::getNdefTextMessage(const QVariant &lang,
          const QVariant &text) {
      QString ndefLang = lang.toString();
      QString ndefText = text.toString();
      QtMobilitySubset::QNdefRecord ndefRecord = QtMobilitySubset::QNdefRecord();
      int langLength = (ndefLang.length() <= 63) ? ndefLang.length() : 63;
      QByteArray ndefPayload;
      ndefPayload[0] = langLength;
      ndefPayload.append(ndefLang.left(langLength)).append(ndefText.toUtf8());
      ndefRecord.setTypeNameFormat(QtMobilitySubset::QNdefRecord::NfcRtd);
      QByteArray nfcRtdText = "T";
      ndefRecord.setType(nfcRtdText);
      ndefRecord.setPayload(ndefPayload);
      QtMobilitySubset::QNdefMessage ndefMessage = QtMobilitySubset::QNdefMessage(
              ndefRecord);
      return ndefMessage.toByteArray();
  }
  

  So far so good

  Now, I wanted to implement similar but using a recording of NFC Custom type.

  This application example

  has a method to create a record custom:

  nfc_ndef_record_t* ApplicationUI::makeCustomRecord(QString domain, QString type,
          QString content) {
  
      nfc_ndef_record_t* record = 0;
  
      int textLen = content.length();
      QString domainPlusType = domain.append(":");
      domainPlusType = domainPlusType.append(type);
      int totalLen = textLen;
  
      uchar_t payload[totalLen];
  
      int offset = 0;
      memcpy(&payload[offset], content.toUtf8().constData(), textLen);
  
      CHECK(
              nfc_create_ndef_record(NDEF_TNF_EXTERNAL,
                      domainPlusType.toUtf8().constData(), payload, totalLen, 0,
                      &record));
  
      return record;
  }
  

  Unfortunately, I'm a nfc_ndef_record_t but need a QByteArray, use the same InvokeActionItem way in which regards NFC text documents.

  Who knows how to convert the nfc_ndef_record_t in QByteArray?

  thx for the help

  Thanks to the help John Murray on twitter (@jcmrim) I'm creating a QNdefRecord:

  QByteArray ApplicationUI::makeCustomRecord(QString domain, QString type,
          QString content) {
  
      QString domainPlusType = domain.append(":");
      domainPlusType = domainPlusType.append(type);
  
      QtMobilitySubset::QNdefRecord ndefRecord = QtMobilitySubset::QNdefRecord();
  
      ndefRecord.setTypeNameFormat(QtMobilitySubset::QNdefRecord::ExternalRtd);
      ndefRecord.setType(domainPlusType.toUtf8());
      ndefRecord.setPayload(content.toUtf8());
  
      QtMobilitySubset::QNdefMessage ndefMessage = QtMobilitySubset::QNdefMessage(
              ndefRecord);
  
      return ndefMessage.toByteArray();
  }
  

  Now the sys. Rises in NFCViewer:

  InvokeActionItem {
              imageSource: "asset:///images/ic_add.png"
              title: qsTr("NFC Custom")
              ActionBar.placement: ActionBarPlacement.OnBar
              query {
                  mimeType: "application/vnd.rim.nfc.ndef"
                  invokeTargetId: "sys.NFCViewer"
                  invokeActionId: "bb.action.SHARE"
              }
              handler: InvokeHandler {
                  id: shareHandler2
                  onInvoking: {
                      tagWriteAction.data = app.makeCustomRecord("org.xxxx", "mytype", nfcText);
                      shareHandler2.confirm();
                  }
              }
          }
  

  But if by tapping a NFC Tag I get

  The data could not be shared over NFC
  

  Any idea?

  Or the NFCViewer not accept ExternalRtd?

  documentation :

  NDEF message is sent in the form of a byte array. The following method is used to create the byte array message:
  

  It works with text documents

  Or I do something wrong to build the payload or the record?

• How to convert pictures from iPhoto?  I need general info and advice.  My library is huge (95 GB).  I am running OSX El Capitan 10.11.6 on iMac.

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  Have you seen this document?   Updated Photos for OS X - Apple iPhoto support

  https://support.Apple.com/en-GB/HT204655

  Is your iPhoto Library Library on your system drive in the pictures folder? And you have a lot of free space on your system drive? The migration will need additional temporary storage.

  Then drag the iPhoto library icon pictures open to create a new library of Photos of her.

  Your albums appear unchanged in the Photos.  Events will appear as additional albums, because the pictures has no events.  See this link: How Photos handles content and metadata for iPhoto and Aperture - Apple Support

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  TT2

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  Please see me step by step how to convert .pdf to .epub

  Hello PrasanW.

  Thank you for using communities Support from Apple. I see your message that you want to convert PDF files into ePub files.

  Read this article.

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  Annoydc,

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  There are a number of free PDF converters on the Mac App store, which allows you to convert text files, but I'm not aware of any free programs convert to Word. Besides knowing what looks like an application and how PDF conversion programs work well, I doubt that the results would be good, even if you've spent the money to buy one.

  However, if the file is not protected by, using the forecasting of Apple program, you should be able to fill out the form. Open the file using the preview, select the Tools menu and select annotate. Select the text option. A text box appears with the word TEXT in there you can change it, change the size and color and then move it to the desired location. Once you have done all of the annotations that you fill out the form, you can save it.

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• need help with my window is in thai and I do not understand to all.how to convert to English?

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  because I can't read thai... Please help me step by step...

  my pc is touchsmart 9100 windows 7 Professional.

  Not a single word is in English if I go to the "region and language" to change.

  Everthing is in thai in the system.

  Hello

  Where have you bought the PC?

  What is the operating system installed?

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  Flip4mac - need version payware intermediary that allows you to convert.  Use with Quicktime player.  Flip4Mac - http://dynamic.telestream.net/downloads/download-flip4macwmv.asp?prodid=flip4mac wmv - the free version will allow QuickTime play, but not to convert Windows Media files.

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  VLC - not really a converter but will do a bit on the menu export.  Can be slow to be converted and there will be a learning curve.

  Explore online converters when you download a file in a format and download in another.

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  -End