Qt-interest Archive, May 2007
How to initialize a static QStringList?
Message 1 in thread
How to initialize a static QStringList?
I have class static QStringList declared as public in .h
class NamePen : public QObject
{
Q_OBJECT
public:
static QStringList PenStyles, PenCapStyles, PenJoinStyles;
// . . .
}
In the corresponding cpp, I put there definitions:
QStringList NamePen::PenStyles, NamePen::PenCapStyles,
NamePen::PenJoinStyles;
But I have no idea where should I put initialize them.
I subclass QApplication and put the initialization part into its
constructor.
It doesn’t work well.
Thanks in advance,
Lingfa
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Message 2 in thread
just do for each QStringList something like this (in ur cpp file
ofcourse):
QStringList NamePen::PenStyles = QStringList();
All should work well
On May 21, 2007, at 8:25 PM, Lingfa Yang wrote:
> How to initialize a static QStringList?
>
> I have class static QStringList declared as public in .h
> class NamePen : public QObject
> {
> Q_OBJECT
> public:
> static QStringList PenStyles, PenCapStyles, PenJoinStyles;
> // . . .
> }
>
> In the corresponding cpp, I put there definitions:
> QStringList NamePen::PenStyles, NamePen::PenCapStyles,
> NamePen::PenJoinStyles;
>
> But I have no idea where should I put initialize them.
> I subclass QApplication and put the initialization part into its
> constructor.
> It doesn’t work well.
>
> Thanks in advance,
> Lingfa
>
>
> --
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> with "unsubscribe" in the subject or the body.
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>
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Message 3 in thread
On 21.05.07 20:34:28, Naresh wrote:
> just do for each QStringList something like this (in ur cpp file ofcourse):
> QStringList NamePen::PenStyles = QStringList();
>
> All should work well
And if you want to add some initial data extend this to
StringList NamePen::PenStyles = QStringList() << "Val1" << "Val2"...;
Andreas
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Message 4 in thread
Andreas Pakulat wrote:
>On 21.05.07 20:34:28, Naresh wrote:
>
>
>>just do for each QStringList something like this (in ur cpp file ofcourse):
>>QStringList NamePen::PenStyles = QStringList();
>>
>>All should work well
>>
>>
>
>And if you want to add some initial data extend this to
>
>StringList NamePen::PenStyles = QStringList() << "Val1" << "Val2"...;
>
>Andreas
>
>
>
Thanks both Naresh and Andreas.
It does not work.
QStringList NamePen::PenJoinStyles = (QStringList()
<< "MiterJoin"
<< "BevelJoin"
<< "RoundJoin"
);
At the moment I use it, program crashed!
Any more idea?
Lingfa
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Message 5 in thread
On 21.05.07 15:49:13, Lingfa Yang wrote:
> Andreas Pakulat wrote:
>
> >On 21.05.07 20:34:28, Naresh wrote:
> >
> >>just do for each QStringList something like this (in ur cpp file ofcourse):
> >>QStringList NamePen::PenStyles = QStringList();
> >>
> >>All should work well
> >>
> >
> >And if you want to add some initial data extend this to
> >
> >StringList NamePen::PenStyles = QStringList() << "Val1" << "Val2"...;
> >
> >Andreas
> >
> >
> Thanks both Naresh and Andreas.
>
> It does not work.
>
> QStringList NamePen::PenJoinStyles = (QStringList()
> << "MiterJoin"
> << "BevelJoin" << "RoundJoin" );
> At the moment I use it, program crashed!
Where did you get the () around the whole thing from? As I wrote:
QStringList NamePen::PenStyles = QStringList() << "Foo" << "Bar";
works fine.
Andreas
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Message 6 in thread
On 21.05.07 16:02:52, Lingfa Yang wrote:
> Andreas Pakulat wrote:
> >On 21.05.07 15:49:13, Lingfa Yang wrote:
> >>Andreas Pakulat wrote:
> >>>On 21.05.07 20:34:28, Naresh wrote:
> >>>>just do for each QStringList something like this (in ur cpp file ofcourse):
> >>>>QStringList NamePen::PenStyles = QStringList();
> >>>>
> >>>>All should work well
> >>>>
> >>>And if you want to add some initial data extend this to
> >>>
> >>>StringList NamePen::PenStyles = QStringList() << "Val1" << "Val2"...;
> >>>
> >>Thanks both Naresh and Andreas.
> >>
> >>It does not work.
> >>
> >>QStringList NamePen::PenJoinStyles = (QStringList()
> >> << "MiterJoin"
> >> << "BevelJoin" << "RoundJoin" );
> >>At the moment I use it, program crashed!
> >>
> >
> >Where did you get the () around the whole thing from? As I wrote:
> >
> >QStringList NamePen::PenStyles = QStringList() << "Foo" << "Bar";
> >
> >works fine.
> >
> I removed "()" that's the same.
Please don't write to me in private.
If it doesn't work for you we need at least the compiler messages or a
backtrace if it crashes and some more code (if possible create a minimal
compilable example).
Andreas
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Message 7 in thread
Andreas Pakulat wrote:
>On 21.05.07 20:34:28, Naresh wrote:
>
>
>>just do for each QStringList something like this (in ur cpp file ofcourse):
>>QStringList NamePen::PenStyles = QStringList();
>>
>>All should work well
>>
>>
>
>And if you want to add some initial data extend this to
>
>StringList NamePen::PenStyles = QStringList() << "Val1" << "Val2"...;
>
>Andreas
>
>
>
The problem is much wired!
I put there three in parallel ways. The first two works, but the third
one crashes! (see attached 1.c)
Lingfa
QStringList NamePen::PenStyles = QStringList()
QStringList NamePen::PenStyles = QStringList()
<< "NoPen" // 0 no line at all. For example, QPainter::drawRect() fills but does not draw any boundary line.
<< "SolidLine" // 1 A plain line.
<< "DashLine" // 2 Dashes separated by a few pixels.
<< "DotLine" // 3 Dots separated by a few pixels.
<< "DashDotLine" // 4 Alternate dots and dashes.
<< "DashDotDotLine" // 5 One dash, two dots, one dash, two dots.
<< "CustomDashLine" // 6 A custom pattern defined using QPainterPathStroker::setDashPattern().
;
QStringList NamePen::PenCapStyles = QStringList()
<< "FlatCap" // 0x00 a square line end that does not cover the end point of the line.
<< "SquareCap" // 0x10 a square line end that covers the end point and extends beyond it by half the line width.
<< "RoundCap" // 0x20 a rounded line end.
;
QStringList NamePen::PenJoinStyles = QStringList()
<< "MiterJoin" // 0x00 The outer edges of the lines are extended to meet at an angle, and this area is filled.
<< "BevelJoin" // 0x40 The triangular notch between the two lines is filled.
<< "RoundJoin" // 0x80 A circular arc between the two lines is filled.
;
int size1 = NamePen::PenStyles.size(); // 7
int size2 = NamePen::PenCapStyles.size(); // 3
int size3 = NamePen::PenJoinStyles.size(); // crash!
Message 8 in thread
On 21.05.07 16:15:28, Lingfa Yang wrote:
> Andreas Pakulat wrote:
>
> >On 21.05.07 20:34:28, Naresh wrote:
> >
> >>just do for each QStringList something like this (in ur cpp file ofcourse):
> >>QStringList NamePen::PenStyles = QStringList();
> >>
> >>All should work well
> >>
> >
> >And if you want to add some initial data extend this to
> >
> >StringList NamePen::PenStyles = QStringList() << "Val1" << "Val2"...;
> >
> >Andreas
> >
> >
> The problem is much wired!
> I put there three in parallel ways. The first two works, but the third one
> crashes! (see attached 1.c)
Whats the backtrace? How does the full test program look like?
Andreas
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Message 9 in thread
>Whats the backtrace? How does the full test program look like?
>
>Andreas
>
>
>
I finally figured out the problem come from a separated boundary mistake
which request memory from stack.
The standard ways of declaration, definition and initiation work well
for static QStringList.
Thanks.
Lingfa
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