Z-order of QTab in a QTabWidget

[Oexal]

Hi. I'm trying to change the Z-order of a tabs in a QTabWidget.

The selected QTab is on top of the other tabs, but from left to right, the tabs goes from under to the top. I Mean, the first tab is under the second tab, that is under the third tab, etc.. We can see this order if we are using a negative margin to get the tabs overlapping each other.

I need to change this order to get my first tab over the second one and the second one over the third one.. so an order from top to under..

I tried the css z-index properties without success and i did'nt find any documentation on how to change this z-order. Is somebody having an idea how to change that?

I also tried to change the creating order of these tabs and also the way they are added to the QTabWidget with a insert (QTabWidget.insertTab()) at position 0 instead of just adding tabs with QTabWidget.addTab().. always the same thing..

here a picture that explain the problem:

!http://i.imgur.com/Wo35D.png(Tab order example)!

[giesbert]

I'm not sure if that is possible.
As the sigle tab items are no widgets, they have no z-order.
perhaps you can subclass QTabBar and reimplement the painting to achieve that?

[Oexal]

will try that!

super thank's :D

[p-himik]

I've written a class to add to QTabWidget shadows on each size of a tab. If you want i'll post relevant code.

[andre]

Sounds like an interesting class, I'd love to see it!

[giesbert]

p-himik,

you could make a wiki codesnippet out of it, couldn't you?

[p-himik]

TabWidget.h
@
class TabWidget : public QTabWidget
{
Q_OBJECT

QWidget* leftShadow_;
QWidget* rightShadow_;

void showEvent( QShowEvent* event );

public:
explicit TabWidget( QWidget* parent = 0 );

private slots:
void tabChanged( int tabNumber );
};@

TabWidget.cpp
@
TabWidget::TabWidget( QWidget* parent ) :
QTabWidget( parent ),
leftShadow_( new QWidget( this ) ),
rightShadow_( new QWidget( this ) )
{
connect( this,
SIGNAL( currentChanged( int ) ),
SLOT( tabChanged( int ) ) );
leftShadow_->setObjectName( "leftshadow" ); // with object name you can easily assign a stylesheet
leftShadow_->setFixedWidth( 10 ); // don't remeber why i did this constant. I think it should be in the stylesheet
leftShadow_->setFixedHeight( tabBar()->height() );
rightShadow_->setObjectName( "rightshad--ow" );
rightShadow_->setFixedWidth( 10 );
rightShadow_->setFixedHeight( tabBar()->height() );
}

void TabWidget::tabChanged( int tabNumber )
{
const QTabBar* tabBar = this->tabBar();
const QRect tabRect = tabBar->tabRect( tabNumber );
if( tabNumber == 0 )
{
leftShadow_->hide();
}
else
{
QPoint leftPos = tabBar->mapTo( this, tabRect.bottomLeft() );
leftShadow_->setFixedHeight( tabRect.height() - 4 ); // this '4' is the difference between heights of selected and unselected tabs
leftShadow_->move( leftPos.x() - leftShadow_->width(),
leftPos.y() - leftShadow_->height() + 1 );
leftShadow_->show();
}
if( tabNumber == ( count() - 1 ) )
{
rightShadow_->hide();
}
else
{
QPoint rightPos = tabBar->mapTo( this, tabRect.bottomRight() );
rightShadow_->setFixedHeight( tabRect.height() - 4 );
rightShadow_->move( rightPos.x(),
rightPos.y() - rightShadow_->height() + 1 );
rightShadow_->show();
}
}

void TabWidget::showEvent ( QShowEvent * event )
{
Q_UNUSED( event )
tabChanged( currentIndex() );
}
@

[p-himik]

Gerolf, ok. I'll do it today.
And here is the stylesheet:
@#leftshadow
{
background-color: qlineargradient(spread:pad,x1:0.312,y1:0.419545,x2:1,y2:0,stop:0 rgba(0, 0, 0, 0),stop:0.817778 rgba(80, 80, 80, 193),stop:1 rgba(80, 80, 80, 255));
}
#rightshadow
{
background-color: qlineargradient(spread:pad,x1:0.680,y1:0.419545,x2:0,y2:0,stop:0 rgba(0, 0, 0, 0),stop:0.817778 rgba(80, 80, 80, 193),stop:1 rgba(80, 80, 80, 255));
}@

[giesbert]

Hi p-himik:

a good idea would be to includ esome image to show, how it looks like :-)

[p-himik]

Here
!http://db.tt/NQA6ogZW(TabWidget)!
The left is a standard QTabWidget promoted to TabWidged and the right is a fancy one.

[p-himik]

Here is the "snippet":http://developer.qt.nokia.com/wiki/QTabWidget_with_side_shadows in the wiki.

[Scylla]

Hey, this looks very nice ;-)
Thank you for sharing this.