How can i write a text background of my treewidget using QPainter?

[newermind]

How can i write a text background of my treewidget using QPainter?

I am using QT 4.5...

[spirit]

do you need to change text color?
I don't understand what you want.

[newermind]

i want to show a text background-treewidget. Not color.

[spirit]

still don't understand. :)

[Lykurg]

If I get you, you want a text as a background. Then use a QPainter to create a QPixmap with your favored text and set that QPixmap as a background image.

[newermind]

QPainter p;

p.begin( tree_widget );

p.drawText( 5, 60, QString("Something"));

p.end();

i wrote this code but it`s not worked .

ERORR:
QPainter::begin: Widget painting can only begin as a result of a paintEvent
QPainter::end: Painter not active, aborted

[spirit]

you must draw in QWidget:: paintEvent.

[newermind]

void QWidget::paintEvent(QPaintEvent *)
{
QPainter p;

p.begin( tree_widget );

p.drawText( 5, 5, QString("Something"));

p.end();

}

ERROR:

The program has unexpectedly finished.

[spirit]

cool!
if you want to draw on a tree widget you must:
-- subclass QTreeWidget/QTreeView and reimplement paintEvent;


...
void MyTreeWidget::paintEvent(QPaintEvent *e)
{
QTreeWidget::paintEvent(e);
QPainter p(this);
//drawing stuff
}
...

-- install event filter on a tree widget and process QPaintEvent.


...
m_treeWidget->viewport()->installEventFilter(this);
...
bool MyWidget::eventFilter(QObject *o, QEvent *e)
{
if (o == m_treeWidget->viewport() && e->type() == QEvent::Paint) {
QPainter p(m_treeWidget->viewport());
//draw stuff
}
return QWidget::eventFilter(o, e);
}

[newermind]

Sorry, i don`t understand .

have you got an example code about this problem?

[spirit]

I updated a post above.

[newermind]

thanks.. it`s worked... :):):):)

[newermind]

how can i refresh this event filter or painter?

Now it`s working when programme started.

[spirit]

do you mean how to chage a text which will be drawn?
have a look at example which is located in QTDIR/examples/widgets/wiggly.