Qt-interest Archive, November 2006
how to get minimumSize() before show()?
Message 1 in thread
Hi there
I have a form which I designed with designer. I do something along the lines
of the following to instantiate it:
class MyFormWidget: public QWidget, Ui_MyForm { // Ui_MyForm is the class
output from uic
public:
MyFormWidget( QWidget *parent )
: QWidget( parent, contraptionView )
{
setupUi( this );
}
};
...
MyFormWidget *myForm = new MyFormWidget(parent);
myForm->minimumSize(); // <---- this is (0,0) even though it shouldn't be
parent->setMinimumSize( myForm->minimumSize() + QSize( 5, 5 ) );
parent->resize( parent->minimumSize() );
parent->show();
---
The problem is that minimumSize doesn't seem to be valid just after I
construct the widget. Does anyone know if this is expected behavior, and how
to work around it? I need to resize parent according to the size constraints
of the newly created widget (MyFormWidget in the above example)
Thanks!
Ross.
--
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Message 2 in thread
Use QTimer::singleShot (0, this, SLOT(asSoonAsInitialized())) from within
your mainform and the slot will be triggered right after the form has been
layouted and the eventloop is entered the first time.
Regards,
Malte
"Ross Bencina" <rossb-lists@xxxxxxxxxxxxxx> schrieb am 02.11.2006
08:19:53:
> Hi there
>
> I have a form which I designed with designer. I do something along the
lines
> of the following to instantiate it:
>
> class MyFormWidget: public QWidget, Ui_MyForm { // Ui_MyForm is the
class
> output from uic
> public:
> MyFormWidget( QWidget *parent )
> : QWidget( parent, contraptionView )
> {
> setupUi( this );
> }
> };
>
> ...
>
> MyFormWidget *myForm = new MyFormWidget(parent);
>
> myForm->minimumSize(); // <---- this is (0,0) even though it shouldn't
be
>
> parent->setMinimumSize( myForm->minimumSize() + QSize( 5, 5 ) );
> parent->resize( parent->minimumSize() );
> parent->show();
>
> ---
>
> The problem is that minimumSize doesn't seem to be valid just after I
> construct the widget. Does anyone know if this is expected behavior, and
how
> to work around it? I need to resize parent according to the size
constraints
> of the newly created widget (MyFormWidget in the above example)
>
> Thanks!
>
> Ross.
>
> --
>
> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx
> with "unsubscribe" in the subject or the body.
> List archive and information: http://lists.trolltech.com/qt-interest/
>
--
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Message 3 in thread
Hi Ross,
I am not sure, if this is guaranteed and will ever be, but it will
definitely be called extremely early. I am pretty sure you will not see
any flicker or something if you resize there.
I believe the eventqueue is organized pretty much like a fifo (correct me
if I am wrong). So since you construct your widget before calling show(),
which generates the paint-events, you will have the timer-event be
processed before the painting stuff.
Regards,
Malte
"Ross Bencina" <rossb-lists@xxxxxxxxxxxxxx> schrieb am 02.11.2006
09:09:22:
> Thanks Malte
>
> But I'm not sure that solves my problem -- will the timer be called
before
> the widget is painted for the first time?
>
>
> > Use QTimer::singleShot (0, this, SLOT(asSoonAsInitialized())) from
within
> > your mainform and the slot will be triggered right after the form has
been
> > layouted and the eventloop is entered the first time.
>
> Bests
>
> Ross.
>
> > "Ross Bencina" <rossb-lists@xxxxxxxxxxxxxx> schrieb am 02.11.2006
> > 08:19:53:
> >
> >> Hi there
> >>
> >> I have a form which I designed with designer. I do something along
the
> > lines
> >> of the following to instantiate it:
> >>
> >> class MyFormWidget: public QWidget, Ui_MyForm { // Ui_MyForm is the
> > class
> >> output from uic
> >> public:
> >> MyFormWidget( QWidget *parent )
> >> : QWidget( parent, contraptionView )
> >> {
> >> setupUi( this );
> >> }
> >> };
> >>
> >> ...
> >>
> >> MyFormWidget *myForm = new MyFormWidget(parent);
> >>
> >> myForm->minimumSize(); // <---- this is (0,0) even though it
shouldn't
> > be
> >>
> >> parent->setMinimumSize( myForm->minimumSize() + QSize( 5, 5 ) );
> >> parent->resize( parent->minimumSize() );
> >> parent->show();
> >>
> >> ---
> >>
> >> The problem is that minimumSize doesn't seem to be valid just after I
> >> construct the widget. Does anyone know if this is expected behavior,
and
> > how
> >> to work around it? I need to resize parent according to the size
> > constraints
> >> of the newly created widget (MyFormWidget in the above example)
> >>
> >> Thanks!
> >>
> >> Ross.
> >>
> >> --
> >>
> >> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx
> >> with "unsubscribe" in the subject or the body.
> >> List archive and information: http://lists.trolltech.com/qt-interest/
> >>
> >
> > --
> > To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with
> > "unsubscribe" in the subject or the body.
> > List archive and information: http://lists.trolltech.com/qt-interest/
> >
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Message 4 in thread
On Thu, 2 Nov 2006 18:19:53 +1100, "Ross Bencina"
<rossb-lists@xxxxxxxxxxxxxx> wrote:
>Hi there
>parent->setMinimumSize( myForm->minimumSize() + QSize( 5, 5 ) );
Try using minimumSizeHint();
parent->setMinimumSize( myForm->minimumSizeHint() + QSize( 5, 5 ));
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Message 5 in thread
On Thursday 02 November 2006 10:18, Timpie.w@xxxxxxxxx wrote:
> On Thu, 2 Nov 2006 18:19:53 +1100, "Ross Bencina"
>
> <rossb-lists@xxxxxxxxxxxxxx> wrote:
> >Hi there
> >parent->setMinimumSize( myForm->minimumSize() + QSize( 5, 5 ) );
>
> Try using minimumSizeHint();
>
> parent->setMinimumSize( myForm->minimumSizeHint() + QSize( 5, 5 ));
And there is showEvent (QShowEvent *) which is called before show ().
Frank
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