[Qt-interest] Can QTextEdit scale in the way what QGraphicsView does?

[cheng long]

Embedding a Widget with QGraphicsProxyWidget

There are two ways to embed a widget using QGraphicsProxyWidget. The most
common way is to pass a widget pointer to
QGraphicsScene::addWidget<http://doc.qt.nokia.com/4.6/qgraphicsscene.html#addWidget>()
together with any relevant
Qt::WindowFlags<http://doc.qt.nokia.com/4.6/qt.html#WindowType-enum>.
This function returns a pointer to a QGraphicsProxyWidget. You can then
choose to reparent or position either the proxy, or the embedded widget
itself.


The description above is copied from
http://doc.qt.nokia.com/4.6/qgraphicsproxywidget.html


I tried also adding QGraphicsProxyWidget by:

QGraphicsProxyWidget* proxy = new QGraphicsProxyWidget();

proxy->setWidget(textEdit);

scene->addItem(proxy);


But it doesn't work also, i.e. when I call view.scale(2., 2.), the textEdit
does not scale along with it.


-Kevin

On Thu, May 20, 2010 at 5:24 PM, Guido Seifert <Wargand at gmx.de> wrote:

>
> Nope, works fine in 4.6.
> But you just cannot add a text widget to a graphics scene.
> To to this you need the QGraphicsProxyWidget. You find an example
> how to do it in your qt's demo folder under 'embeddeddialogs'.
>
> Guido
>
>
> > Does it works only in Qt 4.7? I tried but it fails to work. Codes as
> > below:
> >    m_pWinWidget = new QWinWidget(this);
> >    QHBoxLayout* hbox = new QHBoxLayout(m_pWinWidget);
> >
> >    QGraphicsView* view = new QGraphicsView();
> >    hbox->addWidget(view);
> >
> >    QGraphicsScene* scene = new QGraphicsScene();
> >    view->setScene(scene);
> >
> >    QTextEdit* textEdit = new QTextEdit(view);
> >    textEdit->setText("Hello, Qt");
> >    scene->addWidget(textEdit);
> >
> >    hbox->setMargin(0);
> >    view->setMinimumHeight(300);
> >    view->setMinimumWidth(300);
> >    m_pWinWidget->show();
> >
> > Kevin
> >
> > On Thu, May 20, 2010 at 4:00 PM, Guido Seifert <Wargand at gmx.de> wrote:
> >
> > >
> > >
> > > I want to add: I tried this once. Worked fine. Sort of. The fonts
> looked
> > > very quickly very ugly.
> > >
> > > Guido
> > >
> > > -------- Original-Nachricht --------
> > > > Datum: Thu, 20 May 2010 08:58:57 +0100
> > > > Von: Sean Harmer <sean.harmer at maps-technology.com>
> > > > An: qt-interest at trolltech.com
> > > > Betreff: Re: [Qt-interest] Can QTextEdit scale in the way what
> > > QGraphicsView  does?
> > >
> > > > Hi,
> > > >
> > > > On Thursday 20 May 2010 08:47:06 cheng long wrote:
> > > > > QGraphicsView scales its content by adjusting its transform matrix,
> > > > > very excellent!
> > > > >
> > > > > Is there any way to add this functionality to QTextEdit? How?
> > > >
> > > > You can use QGraphicsProxyWidget to add a QTextEdit to a graphics
> view
> > to
> > > > enable transformations. See the example in the documentation for more
> > > > detail:
> > > >
> > > >
> http://doc.qt.nokia.com/4.7-snapshot/qgraphicsproxywidget.html#details
> > > >
> > > > Cheers,
> > > >
> > > > Sean
> > > > _______________________________________________
> > > > Qt-interest mailing list
> > > > Qt-interest at trolltech.com
> > > > http://lists.trolltech.com/mailman/listinfo/qt-interest
> > >
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