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Access to the user interface

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #2

    Hi,

    in Fhxnn constructor you have:

    @Data * MyData = new Data(this);@

    which shadows your member variable of the same name. Thus I suspect that you call MyData->something later on and thus the crash.

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • L Offline
      L Offline
      leon2225
      wrote on last edited by
      #3

      Okey ... how can I solve the problem ?
      I can't delete @Data * MyData = new Data(this);@
      But also not the declaration in fhxnn.h ..

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #4

        What about just:

        @MyData = new Data(this);@

        ?

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • L Offline
          L Offline
          leon2225
          wrote on last edited by
          #5

          Oh yes .. I've been a bit tired ^^

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          • L Offline
            L Offline
            leon2225
            wrote on last edited by
            #6

            But it still wont open the files ... there's no error or something like that, but the stream soen't write it's data into the member variables

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #7

              Are you sure you are reading the data correctly ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • L Offline
                L Offline
                leon2225
                wrote on last edited by
                #8

                no ... I only meant that the compiler don't find a compile error, of course there have to be an error, if not it would work.
                DO you have an idea where the error is? :D

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #9

                  The debugger is your friend ;)

                  since you wrote it crashes here

                  @MyFxhnn -> ui -> itsText->clear();@

                  Are you sure everything is valid ?

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • L Offline
                    L Offline
                    leon2225
                    wrote on last edited by
                    #10

                    No that problem is fixed.
                    Also the debugger doesn't say anything, the only problem is, that the function openContent() doesn't write the data into itsContent ..

                    @bool Data::openContent(){
                    QString fileName = QFileDialog::getOpenFileName(MyFxhnn, tr("Inhalt öffnen"), QString(),
                    tr("Fxhnn Content Files (*.FXHNNCON)"));
                    QFile file(fileName);
                    if(!file.open(QIODevice::ReadOnly)){
                    QMessageBox::critical(MyFxhnn, tr("Error"), tr("Could not open file"));
                    return false;
                    }
                    QTextStream in(&file);
                    in >> itsContent;
                    printItsContent();
                    file.close();

                        if(itsContent != MyFxhnn -> ui -> itsText -> toPlainText()){
                            QMessageBox::critical(MyFxhnn, tr("Error"), tr("Fehler beim Öffnen, Data != Textfeld"));
                            return false;
                        }
                    
                    
                    
                    return true;
                    

                    }@

                    Leon

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #11

                      From your code, I wouldn't expect openContent to write anything. You open the selected file in ReadOnly mode and you read from it after that.

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • L Offline
                        L Offline
                        leon2225
                        wrote on last edited by
                        #12

                        yea I meant that the function has to "write" the data from the stream into the variable ... but I don't know, where there should be the bug :/

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #13

                          Ok, so you mean that "itsContent" doesn't receive the content of the file ?

                          Following your code printItsContent just clears the itsText widget content so when you compare the content of itsText to itsContent's value, your test will only succeed if itsContent is empty.

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • L Offline
                            L Offline
                            leon2225
                            wrote on last edited by
                            #14

                            I've changed that ... a few days ago :D
                            I'll post the new code .. :
                            data.h
                            @#ifndef DATA_H
                            #define DATA_H

                            #include <QWidget>
                            #include "fxhnn.h"
                            #include "ui_fxhnn.h"
                            #include <cstdlib>
                            #include <limits.h>
                            #include <QString>
                            #include <QFileDialog>
                            #include <QFile>
                            #include <QMessageBox>
                            #include <QTextStream>
                            #include <QDataStream>

                            class Fxhnn;

                            class Data : public QWidget
                            {
                            Q_OBJECT

                            Fxhnn *MyFxhnn;
                            

                            public:
                            explicit Data(Fxhnn*);
                            ~Data();

                                //Zugriffe auf den Inhalt
                            QString getItsContent();
                            void printItsContent();
                            void setItsContent( QString newContent);
                            void readItsContent();
                            void reset();
                            
                            
                                //Speichern der Daten
                            bool saveKeyAndMeta(bool customFileName = 0);
                            bool openKeyAndMeta(bool customFileName = 0);
                            bool saveContent(bool customFileName = 0);
                            bool openContent(bool customFileName = 0);
                            bool saveAll(bool customFileName = 0);
                            bool openAll(bool customFileName = 0);
                            

                            signals:

                            private:
                            qint64 itsKey;
                            QString itsContent;
                            ushort itsShuffleLevel;
                            ushort itsEncryptLevel;
                            QString itsKeyFilename;
                            QString itsContentFilename;
                            };

                            #endif // DATA_H
                            @

                            data.cpp:
                            @#include "data.h"

                            Data::Data(Fxhnn * pFxhnn) : MyFxhnn(pFxhnn),itsEncryptLevel(0), itsShuffleLevel(0)
                            {
                            itsKey = rand() % LONG_MAX;
                            setItsEncryptLevel(0);
                            }

                            Data::~Data()
                            {

                            }

                            //Zugriffe auf itsContent
                            

                            void Data::printItsContent(){
                            MyFxhnn -> ui -> itsText->clear();
                            MyFxhnn -> ui -> itsText -> setPlainText(itsContent);
                            setItsEncryptLevel(0);
                            setItsShuffleLevel(0);
                            return;
                            }

                            void Data::setItsContent(QString newContent){
                            itsContent = newContent;
                            return;
                            }

                            void Data::readItsContent(){
                            itsContent = MyFxhnn -> ui -> itsText -> toPlainText();
                            return;
                            }

                            //Zugriffe auf itsKey
                            

                            qint64 Data::getItsKey(){
                            return itsKey;
                            }

                            void Data::setItsKey(qint64 newKey){
                            itsKey = newKey;
                            return;
                            }

                            void Data::generateItsKey(){
                            itsKey = rand() % USHRT_MAX;
                            return;
                            }

                            //Zugriffe auf das Level der Verschlüsslung
                            void Data::setItsEncryptLevel( short upDownGrade){
                            itsEncryptLevel = itsEncryptLevel + upDownGrade;

                            if(itsEncryptLevel <= 0){
                                MyFxhnn -> ui -> itsIsEncrypted -> setText("Decrypted");
                                MyFxhnn -> ui -> itsIsEncrypted -> setStyleSheet("QLabel {color : #CC0304; }");
                            }
                            else{
                                if(itsEncryptLevel > 0){
                                    QString Out = "Encrypt Level ";
                                    Out.append(QString("%1").arg(itsEncryptLevel));
                                    MyFxhnn -> ui-> itsIsEncrypted-> setText(Out);
                                }
                                else
                                    MyFxhnn -> ui -> itsIsEncrypted -> setText("Encrypted");
                                MyFxhnn -> ui -> itsIsEncrypted -> setStyleSheet("QLabel {color : #4ECC39; }");
                            }
                            

                            }

                            ushort Data::getItsEncryptLevel(){
                            return itsEncryptLevel;
                            }

                            //Daten Speichern und öffnen
                            

                            bool Data::saveKeyAndMeta(bool customFileName){
                            if(itsKeyFilename.isEmpty() || customFileName)
                            itsKeyFilename = QFileDialog::getSaveFileName(MyFxhnn, tr("Schlüssel Speichern"), QString(), tr("Fxhnn Key Files (*.FXHNNKEY)"));
                            if(!itsKeyFilename.isEmpty()){
                            QFile file(itsKeyFilename);
                            if(!file.open(QIODevice::WriteOnly)){
                            QMessageBox::critical(0, tr("Error"), tr("Could not save key"));
                            return false;
                            }
                            QDataStream stream(&file);
                            stream << itsKey << itsEncryptLevel << itsShuffleLevel;
                            file.close();
                            }
                            return true;
                            }

                            bool Data::saveContent(bool customFileName){
                            if(itsContentFilename.isEmpty() || customFileName)
                            itsContentFilename = QFileDialog::getSaveFileName(0, tr("Text Speichern"), QString(), tr("Fxhnn Content Files (*.txt)"));

                            if(!itsContentFilename.isEmpty()){
                                QFile file&#40;itsContentFilename&#41;;
                                if(!file.open(QIODevice::WriteOnly)){
                                    QMessageBox::critical(0, tr("Error"), tr("Could not save file"));
                                    return false;
                                }
                                QTextStream stream(&file);
                                stream << itsContent;
                                file.close();
                            }
                            return true;
                            

                            }

                            bool Data::saveAll(bool customFileName){
                            bool content = saveContent(customFileName);
                            bool keyAndMeta = saveKeyAndMeta(customFileName);

                            if(content && keyAndMeta)
                                return true;
                            
                            return false;
                            

                            }

                            bool Data::openKeyAndMeta( bool customFileName){
                            if(itsKeyFilename.isEmpty() || customFileName )
                            itsKeyFilename = QFileDialog::getOpenFileName(0, tr("Schlüssel Öffnen"), QString(), tr("Fxhnn Key Files (*.FXHNNKEY)"));
                            if(!itsKeyFilename.isEmpty()){
                            QFile file(itsKeyFilename);
                            if(!file.open(QIODevice::ReadOnly)){
                            QMessageBox::critical(0, tr("Error"), tr("Could not open file"));
                            return false;
                            }
                            QDataStream in(&file);
                            in >> itsKey >> itsEncryptLevel >> itsShuffleLevel;
                            file.close();
                            printItsContent();
                            }
                            return true;
                            }

                            bool Data::openContent(bool customFileName){
                            if(itsContentFilename.isEmpty() || customFileName)
                            itsContentFilename= QFileDialog::getOpenFileName(MyFxhnn, tr("Inhalt öffnen"), QString(), tr("Fxhnn Content Files (*.txt)"));

                            if(!itsContentFilename.isEmpty()){
                                QFile file&#40;itsContentFilename&#41;;
                                if(!file.open(QIODevice::ReadOnly)){
                                    QMessageBox::critical(MyFxhnn, tr("Error"), tr("Could not open file"));
                                    return false;
                                }
                                QTextStream in(&file);
                                setItsContent(in.readAll());
                                printItsContent();
                                file.close();
                            
                                if((itsContent != MyFxhnn -> ui -> itsText -> toPlainText()) || itsContent == ""){
                                    QMessageBox::critical(MyFxhnn, tr("Error"), tr("Fehler beim Öffnen, Data != Textfeld"));
                                    return false;
                                }
                            }
                            
                            
                            return true;
                            

                            }

                            bool Data::openAll(bool customFileName){
                            bool content = openContent(customFileName);
                            bool keyAndMeta = openKeyAndMeta(customFileName);

                            if(content && keyAndMeta)
                                return true;
                            
                            return false;
                            

                            }
                            @

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #15

                              So is it working as you expect it to ?

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                              • L Offline
                                L Offline
                                leon2225
                                wrote on last edited by
                                #16

                                No it isn't ... it still have the problem that it couldn't read the data from the files.

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                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #17

                                  Rather than
                                  @
                                  QTextStream in(&file);
                                  setItsContent(in.readAll());@

                                  Why not just:
                                  @
                                  setItsContent(file.readAll());
                                  @

                                  In any case, are you sure that your file is not empty ?

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                  • L Offline
                                    L Offline
                                    leon2225
                                    wrote on last edited by
                                    #18

                                    That doesn't work... And the file isn't empty

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                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #19

                                      Did you check what file.readAll() contains ?

                                      since setItsContent only assign the parameter value to your itsContent member variable why not just do:

                                      @itsContent = file.readAll()@

                                      ?

                                      By the way, you should use const QString& in your setItsContent function, that will avoid unnecessary copies.

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                      • L Offline
                                        L Offline
                                        leon2225
                                        wrote on last edited by
                                        #20

                                        Okey ehm file.readAll() return the right content of the file, the problem is, that it doesn't convert it into QString. readAll() gives back a QByteArray wich normaly could be converted in QString with for example:
                                        @itsContent = QString(file.readAll());@

                                        But it doesn't ...

                                        here is the function again:
                                        @bool Data::openContent(bool customFileName){
                                        if(itsContentFilename.isEmpty() || customFileName)
                                        itsContentFilename= QFileDialog::getOpenFileName(MyFxhnn, tr("Inhalt öffnen"), QString(), tr("Fxhnn Content Files (*.txt)"));

                                        if(!itsContentFilename.isEmpty()){
                                            QFile file&#40;itsContentFilename&#41;;
                                            if(!file.open(QIODevice::ReadOnly)){
                                                QMessageBox::critical(MyFxhnn, tr("Error"), tr("Could not open file"));
                                                return false;
                                            }
                                            QTextStream in(&file);
                                            QMessageBox::information(MyFxhnn, "Content of readAll(", file.readAll());
                                            itsContent = QString(file.readAll());
                                            QMessageBox::information(MyFxhnn, "Content of itsContent", QString(file.readAll()));
                                            printItsContent();
                                            file.close();
                                        
                                            if((itsContent != MyFxhnn -> ui -> itsText -> toPlainText()) || itsContent == ""){
                                                QMessageBox::critical(MyFxhnn, tr("Error"), tr("Fehler beim Öffnen, Data != Textfeld"));
                                                return false;
                                            }
                                        }
                                        
                                        
                                        return true;
                                        

                                        }@

                                        The Message "Content of readAll()" gives back the right content the other message return nothing an the last error message appears.

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                                        • L Offline
                                          L Offline
                                          leon2225
                                          wrote on last edited by
                                          #21

                                          Now it's working a 'bit'.
                                          It is able to read the file and print it into the output, BUT it doesn't save onicode ... and I need unicode so we have to find an other solution :/ :D

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