Scroll checkboxes in tabWidget

[Amindo]

I have created with "QT Designer" simple form with tabWidget
I need to dynamically add checkboxes to tab area:

in my constructor:

======
ui.setupUi(this);

ui.tabWidget->QTabWidget::setTabText(0, QString::fromLocal8Bit("Params"));
ui.tabWidget->QTabWidget::setTabText(1, QString::fromLocal8Bit("SysParams"));



QCheckBox *mycheckBox[100];

mycheckBox[0] = new QCheckBox(ui.tab);
mycheckBox[0]->setObjectName(QString::fromUtf8("mycheckBox[0]"));
mycheckBox[0]->setGeometry(QRect(30, 30, 331, 18));
mycheckBox[0]->setText(QApplication::translate("BarkasikForm", "myCheckBox0", 0, QApplication::UnicodeUTF8));
=======

I can't understand how to scroll tab area when number of checkboxes > 10 and out of viewable area.

I found some code:

=====
QScrollArea *scrollArea;
scrollArea = new QScrollArea(ui.tab);
scrollArea->setBackgroundRole(QPalette:ark);
scrollArea->setWidget(ui.<?????????>);
=====


Help please!

[Michiel]

Something like:

QScrollArea* scrollArea = new QScrollArea(ui.tab);
QWidget* checkboxes = new QWidget(scrollArea);
scrollArea->setWidget(checkboxes);
 
// ...
 
mycheckBox[0] = new QCheckBox(checkboxes);
 
// ...

QScrollArea* scrollArea = new QScrollArea(ui.tab);
QWidget* checkboxes = new QWidget(scrollArea);
scrollArea->setWidget(checkboxes);

// ...

mycheckBox[0] = new QCheckBox(checkboxes);

// ...

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Beware of bugs. This code has not been tested.

[Amindo]

Checkboxes is not visible.

[jpn]

Use layouts. And construct the content first, then set it to the scroll area.

QScrollArea* scrollArea = new QScrollArea(ui.tab);
QWidget* checkboxes = new QWidget(scrollArea);
QVBoxLayout* layout = new QVBoxLayout(checkboxes);
for (int i = 0; i < 100; ++i)
{
   mycheckBox[i] = new QCheckBox(checkboxes);
   ...
   layout->addWidget(mycheckBox[i]);
}
scrollArea->setWidget(checkboxes); // must be last, "QWidget checkboxes" is resized according to its size hint

QScrollArea* scrollArea = new QScrollArea(ui.tab);
QWidget* checkboxes = new QWidget(scrollArea);
QVBoxLayout* layout = new QVBoxLayout(checkboxes);
for (int i = 0; i < 100; ++i)
{
   mycheckBox[i] = new QCheckBox(checkboxes);
   ...
   layout->addWidget(mycheckBox[i]);
}
scrollArea->setWidget(checkboxes); // must be last, "QWidget checkboxes" is resized according to its size hint

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[Amindo]

Thanks. Works fine. But how to set size of scrollable layout to fit tab frame geometry?

[jpn]

You must apply a layout to the tab page as well. Where do you add the tabs, in code or in designer?

Edit: Oh, what's "ui.tab"? Presumably "ui.tabWidget" is the tab widget, so is "ui.tab" the first tab page?

QScrollArea* scrollArea = new QScrollArea(ui.tab);
QVBoxLayout* pageLayout = new QVBoxLayout(ui.tab);
pageLayout->addWidget(scrollArea);
...

QScrollArea* scrollArea = new QScrollArea(ui.tab);
QVBoxLayout* pageLayout = new QVBoxLayout(ui.tab);
pageLayout->addWidget(scrollArea);
...

To copy to clipboard, switch view to plain text mode 

Or simply add the scroll area and apply a layout in designer..

[Amindo]

Thanks fine code!


For hystory: my working code......

ScrollArea* scrollArea = new QScrollArea(ui.tab);
QWidget* checkboxes = new QWidget(scrollArea);
QVBoxLayout* layout = new QVBoxLayout(checkboxes);
 
QVBoxLayout* pageLayout = new QVBoxLayout(ui.tab);
pageLayout->addWidget(scrollArea);	
 
 
QCheckBox *mycheckBox[100];
 
for (int i = 0; i < 100; ++i)
{
 
mycheckBox[i] = new QCheckBox(checkboxes);
mycheckBox[i]->setGeometry(QRect(30, 30, 331, 18));
mycheckBox[i]->setText(QApplication::translate("BarkasikForm", "my0", 0, QApplication::UnicodeUTF8));
 
layout->addWidget(mycheckBox[i]);
 
}
 
scrollArea->setWidget(checkboxes);

ScrollArea* scrollArea = new QScrollArea(ui.tab);
QWidget* checkboxes = new QWidget(scrollArea);
QVBoxLayout* layout = new QVBoxLayout(checkboxes);

QVBoxLayout* pageLayout = new QVBoxLayout(ui.tab);
pageLayout->addWidget(scrollArea);	


QCheckBox *mycheckBox[100];

for (int i = 0; i < 100; ++i)
{

mycheckBox[i] = new QCheckBox(checkboxes);
mycheckBox[i]->setGeometry(QRect(30, 30, 331, 18));
mycheckBox[i]->setText(QApplication::translate("BarkasikForm", "my0", 0, QApplication::UnicodeUTF8));

layout->addWidget(mycheckBox[i]);

}

scrollArea->setWidget(checkboxes);

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[Michiel]

Now that the checkboxes are in a layout, you can leave out the setGeometry call.