Date: Sun, 18 Feb 2001 13:29:58 -0600 From: Damon Permezel <dap@damon.com> To: ports@freebsd.org Subject: qcad 1.4.2 and QT 2.2.4 Message-ID: <20010218132958.M46912@fubar.damon.com>
next in thread | raw e-mail | index | archive | help
Sorry if this has been reported before.
Running 4.1-STABLE.
QCAD SEGVs on startup, due to a call to:
QApplication::setStyle( new QWindowsStyle() );
(Why, I don't know...; there was a "nice???" Motif one setup.)
Anyway, this causes QT2.2.4 to crap out, because when they are
changing styles, they neglect to call the widget routine to
change the w->extra->style from the old (which is deleted) to the
new.
I am new to both QCAD and QT -- I just wanted to install QCAD and see
what it looked like, but my guess is that the problem lies here:
void QApplication::setStyle( QStyle *style )
{
QStyle* old = app_style;
app_style = style;
if ( startingUp() ) {
//// this in itself looks dubious, but is not the problem
delete old;
return;
}
// clean up the old style
if (old) {
if ( is_app_running && !is_app_closing ) {
QWidgetIntDictIt it( *((QWidgetIntDict*)QWidget::mapper) );
register QWidget *w;
while ( (w=it.current()) ) { // for all widgets...
++it;
if ( !w->testWFlags(WType_Desktop) && // except desktop
w->testWState(WState_Polished) ) { // has been polished
old->unPolish(w);
}
}
}
old->unPolish( qApp );
}
// take care of possible palette requirements of certain gui
// styles. Do it before polishing the application since the style
// might call QApplication::setStyle() itself
if ( !qt_std_pal )
qt_create_std_palette();
QPalette tmpPal = *qt_std_pal;
app_style->polish( tmpPal );
setPalette( tmpPal, TRUE );
// initialize the application with the new style
app_style->polish( qApp );
// re-polish existing widgets if necessary
if (old) {
if ( is_app_running && !is_app_closing ) {
QWidgetIntDictIt it( *((QWidgetIntDict*)QWidget::mapper) );
register QWidget *w;
while ( (w=it.current()) ) { // for all widgets...
++it;
if ( !w->testWFlags(WType_Desktop) ) { // except desktop
if ( w->testWState(WState_Polished) )
app_style->polish(w); // repolish
////////////////
//// they call styleChange(), but this doesn't change the w->extra->style
//// a call is needed to w->setStyle(). In fact, this does the
//// unpolishing and repolishing, but the reason I don't want to just call
//// setStyle here is that there are many widgets with no style set,
//// and this would set it for all of them. I suspect that certain
//// widgets have no need of style, and calling setStyle() would
//// break this.
////////////////
w->styleChange( *old );
if ( w->isVisible() ){
w->update();
}
}
}
}
delete old;
}
}
If I comment out the offending call in QCAD, the programme starts up
fine.... no idea yet how long that will last.
However, the problem lies ultimately in QT.
Cheers,
Damon.
--
--
Damon Permezel
dap@damon.com
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-ports" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20010218132958.M46912>