Resizing image to display in TableView

gabor53

Hi,
I'm trying to resize an image pulled from a database to be able to display it in TableView.

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    QSqlDatabase db;
        db = QSqlDatabase::addDatabase ("QSQLITE");
        db.setDatabaseName ("C:/Programming/Qtsamples/Image_from_db_to_Table/db.db");

        if(!db.open ())
        {
            qDebug() << "The database is NOT open!";
        }
        else
        {
            qDebug() << "The database is open!";
        }

        QSqlQuery query("SELECT ID,Pic FROM Items");

        if(query.isActive()==true)
          {
              qDebug() << "The query is active.";
          }
          else
          {
             qDebug() << "The query is NOT active.";
          } 

        query.first ();
       	int ID;

        QStandardItemModel *smodel = new QStandardItemModel;
        QStandardItem *Item = new QStandardItem();
        QStandardItem *Item2 = new QStandardItem();

        Item->setData (QVariant(ID = query.value (0).toInt ()));
        qDebug() << "ID = " << Item->data ().toInt ();
        smodel->setItem (0,0,Item);

        QByteArray ByteArray;
        ByteArray = query.value (1).toByteArray ();
     	QPixmap Pixmap;

		Pixmap.loadFromData (ByteArray);

		Pixmap.scaled (100,100,Qt::KeepAspectRatio);

        Item2->setData (QVariant(Pixmap),Qt::DecorationRole);

		smodel->setItem (0,1,Item2);
        ui->tableView->verticalHeader ()->setDefaultSectionSize (100);
        ui->tableView->horizontalHeader ()->setDefaultSectionSize (100);

        ui->tableView->setModel (smodel);

db.close ();

}

MainWindow::~MainWindow()
{
    delete ui;
}

It displays the image but without resizing. What can I do differently to be able to see the whole image?
Thank you.

Ratzz

May be you can try this

 Pixmap.scaled (100,100 Qt::IgnoreAspectRatio, Qt::FastTransformation));

mrjj

Hi
The scaled function returns the modified version
not changing the original one.
so
Pixmap.scaled (100,100,Qt::KeepAspectRatio);
should be
Pixmap=Pixmap.scaled (100,100,Qt::KeepAspectRatio);
or
QPixmap myscaled=Pixmap.scaled (100,100,Qt::KeepAspectRatio);
If you want to use the scaled version later on.

http://doc.qt.io/qt-5.5/qpixmap.html#scaled

gabor53

Thank you. It worked.