QTabWidget how to hide pane only? - qt

Question

I have added a QToolButton as corner widget in QTabWidget which is checkable. I want to hide all tabs (panes only) when the tool button is unchecked. I tried to connect button's signal clicked(bool) with all tab's setVisible(bool) slot not working but. I also connected tabwidget's setvisible to the signal but complete widget became invisible(it was a silly trial). Is there any way to make only pane invisible and tab bar will not disappear ?
Edit: Code (ui have a tabwidget and two tabs namely tab and tab_2)
ui->setupUi(this);
QToolButton * b = new QToolButton;
b->setCheckable(true);
b->setChecked(true);
b->setAutoRaise(true);
b->setText("Hide Tabs");
ui->tabWidget->setCornerWidget(b);
connect(b,SIGNAL(clicked()),ui->tab,SLOT(hide()));
connect(b,SIGNAL(clicked()),ui->tab_2,SLOT(hide()));

Answer 1

Use qFindChild to find the QTabBar within the QTabWidget:
QTabBar *tabBar = qFindChild<QTabBar *>(ui->tabWidget);
tabBar->hide();
For Qt5:
QTabBar *tabBar = ui->tabWidget->findChild<QTabBar *>();
tabBar->hide();

Answer 2

so I understand it like this, you want to hide the TabBar and let the tab visible. Or at least that's what I get from your question
Well if that the case all you have to do it's this:
connect(ui->pushButton,SIGNAL(clicked()),ui->tabWidget->tabBar(),SLOT(hide()));
I hope this was helpful, even do the questions in a little old, I though it may help new viewers.

Answer 3

Here is my take on this. I've created a class that inherits QTabWidget. What I do is; set the "maximum vertical size of QTabWidget" to its tabBars height to hide the panels.
It is a hacky solution and I had to add some extra lines to deal with quirks.
file: hidabletabwidget.h
#ifndef HIDABLETABWIDGET_H
#define HIDABLETABWIDGET_H
#include <QTabWidget>
#include <QAction>
class HidableTabWidget : public QTabWidget
{
Q_OBJECT
public:
explicit HidableTabWidget(QWidget *parent = 0);
QAction hideAction;
private slots:
void onHideAction(bool checked);
void onTabBarClicked();
};
#endif // HIDABLETABWIDGET_H
file: hidablewidget.cpp
#include "hidabletabwidget.h"
#include <QTabBar>
#include <QToolButton>
HidableTabWidget::HidableTabWidget(QWidget *parent) :
QTabWidget(parent),
hideAction("▾", this)
{
hideAction.setCheckable(true);
hideAction.setToolTip("Hide Panels");
QToolButton* hideButton = new QToolButton();
hideButton->setDefaultAction(&hideAction);
hideButton->setAutoRaise(true);
this->setCornerWidget(hideButton);
connect(&hideAction, SIGNAL(toggled(bool)), this, SLOT(onHideAction(bool)));
connect(this, SIGNAL(tabBarClicked(int)), this, SLOT(onTabBarClicked()));
}
void HidableTabWidget::onHideAction(bool checked)
{
if (checked)
{
this->setMaximumHeight(this->tabBar()->height());
this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
}
else
{
this->setMaximumHeight(QWIDGETSIZE_MAX); // by default widgets can expand to a maximum sized defined by this macro
this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
}
}
void HidableTabWidget::onTabBarClicked()
{
hideAction.setChecked(false);
}
To use this, you can simply "promote" your QTabWidget to "HidableTabWidget" using qt designer.
And here is how it looks on my system:

Answer 4

You usually want to remove the Tab from the QTabWidget:
void QTabWidget::removeTab ( int index )
The Tab removed will not be deleted and can be reinserted!
So you would connect your QToolButton b to a slot which simply removes the Tabs like this:
connect( b, SIGNAL(clicked()), this, SLOT(hideTabs() );
..
void Foobar::hideTabs( void )
{
for( int i = 0; i < ui->tabWidget->count(); ++i )
ui->tabWidget->removeTab(i);
}

Answer 5

I can not comment due to my low "reputation" so far. If I could I'd just add a comment to Anatoli's answer: the goal is to hide "page area", not "tab bar". So if we imply they always use QStackedWidget for that then the answer should be more like:
auto * tab_pane = qFindChild<QStackedWidget *>(ui->tabWidget);
tab_pane->hide();
or for Qt5:
auto * tab_pane = ui->tabWidget->findChild<QStackedWidget *>();
tab_pane->hide();