Scrolling bar problem in QScrollArea

[YuriyRusinov]

Hello !

I have some widgets in horizontal layout, this layout was put in vertical layout and vertical layout was put in QScrollArea item.


QScrollArea * searchAttrs = new QScrollArea (gbAttr);

QGridLayout *gLayout = new QGridLayout (this);
gLayout->addWidget (searchAttrs);
QVBoxLayout * vBLayout = new QVBoxLayout (searchAttrs);
vBLayout->setSpacing(6);
vBLayout->setMargin(0);
vBLayout->setObjectName(QString::fromUtf8("vBLayout"));
int num = 1;
QHBoxLayout *hBLayout = new QHBoxLayout();
hBLayout->setSpacing(6);
hBLayout->setMargin(0);
QComboBox *cbsAttrName = new QComboBox (searchAttrs);//gbAttr);
cbsAttrName->setEditable(true);
cbsAttrName->setObjectName (QString("cbsAttrName%1").arg(num));

cbsAttrName->setVisible (true);
this->cbsAttrNames.append (cbsAttrName);

hBLayout->addWidget (cbsAttrName);

QComboBox * cbsAttrRel = new QComboBox (searchAttrs);//gbAttr);
this->cbsAttrRels.append (cbsAttrRel);
cbsAttrRel->setObjectName (QString("cbsAttrRel%1").arg(num));

cbsAttrRel->setVisible (true);

hBLayout->addWidget (cbsAttrRel);

QLineEdit *sLEValue = new QLineEdit (searchAttrs);//gbAttr);
sLEValue->setObjectName (QString("sLEValue%1").arg(num));

sLEValue->setVisible (true);
this->leVals.append (sLEValue);

hBLayout->addWidget (sLEValue);

QToolButton *sTBMore = new QToolButton (searchAttrs);//gbAttr);
sTBMore->setObjectName(QString::fromUtf8("sTBMore%1").arg(num));
sTBMore->setText (QString::fromUtf8("+"));

sTBMore->setVisible (true);
this->stbMore.append (sTBMore);

hBLayout->addWidget (sTBMore);

QToolButton *sTBFewer = new QToolButton(searchAttrs);//gbAttr);
sTBFewer->setObjectName(QString::fromUtf8("sTBFewer%1").arg(num));
sTBFewer->setText (QString::fromUtf8("-"));

sTBFewer->setVisible (true);
this->stbFewer.append (sTBFewer);

hBLayout->addWidget (sTBFewer);

if (num==0)
vBLayout->addLayout (hBLayout);//, vBLayout->count()-1);
else
vBLayout->insertLayout (vBLayout->count()-1, hBLayout);
connect (sTBMore, SIGNAL(pressed()), this, SLOT (addAttr()) );
connect (sTBFewer, SIGNAL(pressed()), this, SLOT (delAttr ()) );

spacerItem = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);

vBLayout->addItem (spacerItem);
searchAttrs->setSizePolicy (QSizePolicy::Expanding, QSizePolicy::Expanding);

If I press sTBMore toolbutton too many times then hBLayout height is decreasing, but vertical scroll bar in searchAttrs does not appear. Which way I have to make hBLayout fixed height and make scrolling in QScrollArea ?

[jpn]

Don't install a layout on the QScrollArea widget. Use QScrollArea::setWidget() to set a widget inside the scroll area.