QPixmap xx.scaledToWidth dont Scale but load...

[patrik08]

I wand to scale an image on my CMS is this to much work if scale slot is a qslider

or is int width QSize and not pixel?

scaledToWidth ( int width, Qt::TransformationMode mode = Qt::FastTransformation ) const

/* header */
private:
   Gui_Image( QWidget* = 0 );
    QImage image;
    QPixmap myPixmap;
    QSize actual;
/* header ..... */
 
/* i load image */
 
        fileName = OpenFile("Image (*.png)");
 
        if (!fileName.isEmpty()) {
           connect(horizontalSlider, SIGNAL(valueChanged(int)), this, SLOT(ModpicsChanged(int)));
           ...
           centrale->setPixmap(QPixmap::fromImage(image));
           ...
           centrale->adjustSize();
 
           actual =  centrale->pixmap()->size();
           ...
           horizontalSlider->setSliderPosition(wi);
           ...
        }
/* .....   */
 
void Gui_Image::ModpicsChanged(int newvalue_w)   /* int from QSlider 20px steeps */
{
    ...
    myPixmap = QPixmap::fromImage(image);
    myPixmap.scaledToWidth(newvalue_w,Qt::FastTransformation);
    centrale->setPixmap(myPixmap);  /* label */
    centrale->adjustSize();  /* label */
    actual =  centrale->pixmap()->size();
    ...
}

/* header */
private:
   Gui_Image( QWidget* = 0 );
    QImage image;
    QPixmap myPixmap;
    QSize actual;
/* header ..... */

/* i load image */

        fileName = OpenFile("Image (*.png)");
    
        if (!fileName.isEmpty()) {
           connect(horizontalSlider, SIGNAL(valueChanged(int)), this, SLOT(ModpicsChanged(int)));
           ...
           centrale->setPixmap(QPixmap::fromImage(image));
           ...
           centrale->adjustSize();
        
           actual =  centrale->pixmap()->size();
           ...
           horizontalSlider->setSliderPosition(wi);
           ...
        }
/* .....   */

void Gui_Image::ModpicsChanged(int newvalue_w)   /* int from QSlider 20px steeps */
{
    ...
    myPixmap = QPixmap::fromImage(image);
    myPixmap.scaledToWidth(newvalue_w,Qt::FastTransformation);
    centrale->setPixmap(myPixmap);  /* label */
    centrale->adjustSize();  /* label */
    actual =  centrale->pixmap()->size();
    ...
}

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