Scrollbar always grayed out

[Gargolissimus]

Hello,

i used QtDesigner for placing a QScrollArea into a QWidget and placing a QGridLayout into this QScrollArea. Now i add QLabels into the GridLayout

QLabel *lab = new QLabel();
lab->setPixmap(QPixmap::fromImage(img));
lab->setMinimumSize(img.size());
m_ui.gridLayout->addWidget(lab, m_currentRow, m_currentColumn);
}

QLabel *lab = new QLabel();
lab->setPixmap(QPixmap::fromImage(img));
lab->setMinimumSize(img.size());
m_ui.gridLayout->addWidget(lab, m_currentRow, m_currentColumn);
}

To copy to clipboard, switch view to plain text mode 

The Labels are added and displayed correctly, but if i add more labels than my Widget can display, the scrollbars (ScrollbarAlwaysOn) are still grayed out.
What has to be done?

Thanks in advance
Garg

[wysota]

set the "widgetResizable" property of the scroll area to true.

[Gargolissimus]

it is true...

here is the code generated from QtDesigner

QScrollArea *scrollArea;
    QWidget *scrollAreaWidgetContents;
    QWidget *gridLayoutWidget;
    QGridLayout *gridLayout;
 
    void setupUi(QWidget *ImageViewerClass)
    {
  //... 
        scrollArea = new QScrollArea(ImageViewerClass);
        QSizePolicy sizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        sizePolicy.setHorizontalStretch(0);
        sizePolicy.setVerticalStretch(0);
        sizePolicy.setHeightForWidth(scrollArea->sizePolicy().hasHeightForWidth());
        scrollArea->setSizePolicy(sizePolicy);
        scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
        scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
        scrollArea->setWidgetResizable(true);
        scrollAreaWidgetContents = new QWidget();
 
        gridLayoutWidget = new QWidget(scrollAreaWidgetContents);
        gridLayout = new QGridLayout(gridLayoutWidget);
        gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
        gridLayout->setSizeConstraint(QLayout::SetMinAndMaxSize);
        gridLayout->setContentsMargins(0, 0, 0, 0);
        scrollArea->setWidget(scrollAreaWidgetContents);

QScrollArea *scrollArea;
    QWidget *scrollAreaWidgetContents;
    QWidget *gridLayoutWidget;
    QGridLayout *gridLayout;

    void setupUi(QWidget *ImageViewerClass)
    {
  //... 
        scrollArea = new QScrollArea(ImageViewerClass);
        QSizePolicy sizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        sizePolicy.setHorizontalStretch(0);
        sizePolicy.setVerticalStretch(0);
        sizePolicy.setHeightForWidth(scrollArea->sizePolicy().hasHeightForWidth());
        scrollArea->setSizePolicy(sizePolicy);
        scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
        scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
        scrollArea->setWidgetResizable(true);
        scrollAreaWidgetContents = new QWidget();
  
        gridLayoutWidget = new QWidget(scrollAreaWidgetContents);
        gridLayout = new QGridLayout(gridLayoutWidget);
        gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
        gridLayout->setSizeConstraint(QLayout::SetMinAndMaxSize);
        gridLayout->setContentsMargins(0, 0, 0, 0);
        scrollArea->setWidget(scrollAreaWidgetContents);

To copy to clipboard, switch view to plain text mode 

I dont know where i can find more information (looked into api, qt-book, goole)

[wysota]

And how do you add the labels to the widget? Could you post the ui file? Mine is attached and works fine.

[Gargolissimus]

they are added at runtime

void ImageViewer::addImage(const QImage &img)
{
	QLabel *lab = new QLabel();
	lab->setPixmap(QPixmap::fromImage(img));
	lab->setMinimumSize(img.size());
	m_ui.gridLayout->addWidget(lab, m_currentRow, m_currentColumn);
 
}

void ImageViewer::addImage(const QImage &img)
{
	QLabel *lab = new QLabel();
	lab->setPixmap(QPixmap::fromImage(img));
	lab->setMinimumSize(img.size());
	m_ui.gridLayout->addWidget(lab, m_currentRow, m_currentColumn);

}

To copy to clipboard, switch view to plain text mode 

mine makes it the indirect way about "GridLayoutWidget"

[Gargolissimus]

Now i coded it manually without using VS Integration and it works ;-) seems to generate stupid code?

ty