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Overloaded function type error

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  • SGaistS SGaist

    @jsulm In this case, setModelData should stay const, it's the original method signature. addNewImage should be made const (and its parameter a const reference). And also, why not use the model directly to store the new data ?

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    gabor53
    wrote on last edited by
    #10

    @SGaist
    Is there an example how to do it? I have 2 data types: image and text. If there is a way to let the model store the data and update the db instead of my delegate that would save a lot of coding.
    Thank you.

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

      Can you give a more complete description of what you are trying to achieve ?

      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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      • SGaistS SGaist

        Can you give a more complete description of what you are trying to achieve ?

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        gabor53
        wrote on last edited by
        #12

        @SGaist
        This part displays the DB data in a table view where the user can review and correct data. Some of the fields are corrected as text fields, some of them as drop downs and I also have an image field. That's why I have the mydelegate and image delegate classes to handle the different editors. My struggle is to pass the image file name to a function where the corrected image can be saved to the DB replacing the old, incorrect image.
        The problem is that the original delegate functions are const functions and as I most likely incorrectly handle them I keep getting different error messages.
        Thank you for your help.

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

          Then there's no need for a "do-it-all" delegate.

          Assign your delegate only to the column where it make sense. That will simplify your life.

          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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          • SGaistS SGaist

            Then there's no need for a "do-it-all" delegate.

            Assign your delegate only to the column where it make sense. That will simplify your life.

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            gabor53
            wrote on last edited by
            #14

            @SGaist
            Which is the better: to have a separate delegate for each column where needed or have one delegate for each type of input method ? (For example one delegate handles all dropdowns, one all check idea etc.)
            Thank you.

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

              You only need as many delegate as you have special cases.

              Note that I didn't say "as many as the column count". If you have several columns of a special type then juste instantiate one delegate per column.

              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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              • SGaistS SGaist

                You only need as many delegate as you have special cases.

                Note that I didn't say "as many as the column count". If you have several columns of a special type then juste instantiate one delegate per column.

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                gabor53
                wrote on last edited by
                #16

                @SGaist
                How can I use the model directly to save the newly picked image? Is there a sample code you know about?

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

                  Well, you have a pointer to your model in setModelData, so why not use it ?

                  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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                  • SGaistS SGaist

                    Well, you have a pointer to your model in setModelData, so why not use it ?

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                    gabor53
                    wrote on last edited by
                    #18

                    @SGaist
                    I started to use the pointer in setModelData. Added

                    oid ImageDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const {
                      ImagePickButton* imgPick = qobject_cast<ImagePickButton*>(editor);
                      Q_ASSERT(imgPick);
                    
                      if(imgPick->selectedFile().isEmpty()) {
                        model->setData(index, QVariant(), Qt::UserRole);
                        model->setData(index, QVariant(), Qt::DecorationRole);
                      } else {
                        model->setData(index, imgPick->selectedFile(), Qt::UserRole);
                        model->setData(index, QIcon(imgPick->selectedFile()), Qt::DecorationRole);
                        //Adding image to db
                    
                        qDebug() << "Selected file: " << imgPick->selectedFile();
                        qDebug() << "Selected file name: " << imgPick->m_selectedFile;
                    //new
                        model->setData (index, imgPick->selectedFile (), Qt::DecorationRole);
                      }
                    

                    Causes no error, but doesn't save the img to the db ether. What am I supposed to use to commit the changes to the db?

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

                      What kind of model are you using ?

                      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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                      • SGaistS SGaist

                        What kind of model are you using ?

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                        gabor53
                        wrote on last edited by
                        #20

                        @SGaist
                        I use QStandardItemModel.

                        #include "fixdb.h"
                        #include "ui_fixdb.h"
                        #include <QDebug>
                        
                        FixDb::FixDb(QWidget* parent) :
                          QDialog(parent),
                          ui(new Ui::FixDb) {
                          ui->setupUi(this);
                        
                          correctFriend ();
                        }
                        
                        FixDb::~FixDb() {
                          delete ui;
                        }
                        
                        void FixDb::correctFriend() {
                          QSqlQuery query_fix ("SELECT * FROM Items ORDER BY name asc");
                        
                          if(query_fix.isActive () == true) {
                            qDebug() << "The query_fix is active!";
                          } else {
                            qDebug() << "The query_fix is NOT active!" << query_fix.lastError ();
                          }
                        
                          QStandardItemModel* fixModel = new QStandardItemModel(this);
                          ui->tableView_Fix->setModel (fixModel);
                        
                        
                          ui->tableView_Fix->setItemDelegateForColumn(3, new ImageDelegate(this));
                        
                        
                          for(int row1 = 0; query_fix.next (); row1++) {
                            if(row1 == 0) {
                              const QSqlRecord qRec = query_fix.record();
                              qDebug() << "The number of records (MainWindow): " << qRec;
                              fixModel->insertColumns (0, qRec.count());
                              qDebug() << "fixdb record count: " << qRec.count ();
                        
                            }
                        
                            fixModel->insertRow (row1);
                            fixModel->setData (fixModel->index (row1, 0), query_fix.value (0));
                            fixModel->setData (fixModel->index (row1, 1), query_fix.value (1));
                            fixModel->setData (fixModel->index (row1, 2), query_fix.value (11));
                        
                            fixPixmap.loadFromData (query_fix.value (2).toByteArray ());
                            fixPixmap = fixPixmap.scaled (100, 100, Qt::KeepAspectRatio);
                        
                            fixModel->setData (fixModel->index (row1, 3), fixPixmap, Qt::DecorationRole);
                            fixModel->setData (fixModel->index (row1, 4), query_fix.value (11));
                            fixModel->setData (fixModel->index (row1, 5), query_fix.value (10));
                            fixModel->setData (fixModel->index (row1, 6), query_fix.value (3));
                            fixModel->setData (fixModel->index(row1, 7), query_fix.value (4));
                            fixModel->setData (fixModel->index (row1, 8), query_fix.value (12));
                            fixModel->setData (fixModel->index (row1, 9), query_fix.value (7));
                            fixModel->setData (fixModel->index (row1, 10), query_fix.value (8));
                            fixModel->setData (fixModel->index (row1, 11), query_fix.value (9));
                        
                            ui->tableView_Fix->setRowHeight (row1, 100);
                          }
                        
                          ui->tableView_Fix->horizontalHeader ()->setStyleSheet ("QHeaderView{font: 14pt Arial; color: blue; font-weight: bold; text-decoration: underline;}");
                          ui->tableView_Fix->verticalHeader ()->setVisible (false);
                          ui->tableView_Fix->setAlternatingRowColors (true);
                          ui->tableView_Fix->setStyleSheet ("alternate-background-color: rgb(224,255,248); background-color: white; font: 14pt Arial; ");
                        
                          fixModel->setHeaderData (0, Qt::Horizontal, QObject::tr ("ID"));
                          fixModel->setHeaderData (1, Qt::Horizontal, QObject::tr ("Name"));
                          fixModel->setHeaderData (2, Qt::Horizontal, QObject::tr ("What"));
                          fixModel->setHeaderData (3, Qt::Horizontal, QObject::tr ("Image"));
                          fixModel->setHeaderData (4, Qt::Horizontal, QObject::tr ("Material"));
                          fixModel->setHeaderData (5, Qt::Horizontal, QObject::tr ("Color"));
                          fixModel->setHeaderData (6, Qt::Horizontal, QObject::tr ("Description"));
                          fixModel->setHeaderData (7, Qt::Horizontal, QObject::tr ("Adoption Date"));
                          fixModel->setHeaderData (8, Qt::Horizontal, QObject::tr ("Signed by"));
                          fixModel->setHeaderData (9, Qt::Horizontal, QObject::tr ("History"));
                          fixModel->setHeaderData (10, Qt::Horizontal, QObject::tr ("Age"));
                          fixModel->setHeaderData (11, Qt::Horizontal, QObject::tr ("Notes"));
                        
                          ui->tableView_Fix->setColumnWidth (0, 60);
                          ui->tableView_Fix->setColumnWidth (1, 120);
                          ui->tableView_Fix->setColumnWidth (2, 150);
                          ui->tableView_Fix->setColumnWidth (3, 100);
                          ui->tableView_Fix->setColumnWidth (4, 130);
                          ui->tableView_Fix->setColumnWidth (5, 120);
                          ui->tableView_Fix->setColumnWidth (6, 400);
                          ui->tableView_Fix->setColumnWidth (7, 150);
                          ui->tableView_Fix->setColumnWidth (8, 200);
                          ui->tableView_Fix->setColumnWidth (9, 400);
                          ui->tableView_Fix->setColumnWidth (10, 130);
                          ui->tableView_Fix->setColumnWidth (11, 300);
                        
                          ui->tableView_Fix->setWordWrap (true);
                        
                        
                        }
                        
                        
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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #21

                          Why not use a QSqlTableModel ?

                          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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                          • SGaistS SGaist

                            Why not use a QSqlTableModel ?

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                            gabor53
                            wrote on last edited by
                            #22

                            @SGaist
                            I had difficulties with the elegates. Can I still use different delegates for some columns? If so I will redo that section.

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #23

                              Yes, you can.

                              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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                              • SGaistS SGaist

                                Yes, you can.

                                G Offline
                                G Offline
                                gabor53
                                wrote on last edited by
                                #24

                                @SGaist
                                Thank you.
                                I'm working on it.

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