Qt-interest Archive, June 2007
QTcpSocket slows down
Message 1 in thread
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Hi,
if I execute the following program, I see
(look at the output, following the code)
that every loop takes longer.
Of course, it may be, that it is not "every" loop, but
just one of the 1000 loops I qDebug...
- ---- Code ---------
#include <QCoreApplication>
#include <QStringList>
#include <QtDebug>
#include <QTime>
#include <QTcpSocket>
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
QStringList lstArgs = app.arguments();
qDebug() << lstArgs.at(0) << " build " << __DATE__ << " " << __TIME__;
QTime timer;
timer.start();
for (int nPort = 1; nPort < 65000; nPort++)
{
QTcpSocket socket;
socket.connectToHost("127.0.0.1", nPort);
if (socket.waitForConnected(30) == true)
qDebug() << "open:" << nPort << " ";
if (nPort % 1000 == 0)
qDebug() << "to " << nPort << " " << timer.restart() << " ms";
} // for
return 0;
}
- ------ end of code ---------
I removed all "open" lines
- ------- begin of output -------
to 1000 227 ms
to 2000 294 ms
to 3000 375 ms
to 4000 455 ms
to 5000 557 ms
to 6000 650 ms
to 7000 784 ms
to 8000 963 ms
to 9000 1164 ms
to 10000 1397 ms
to 11000 1657 ms
to 12000 1900 ms
to 13000 2166 ms
to 14000 2482 ms
to 15000 2743 ms
to 16000 2970 ms
to 17000 3172 ms
to 18000 3360 ms
to 19000 3565 ms
to 20000 3710 ms
to 21000 3908 ms
to 22000 4105 ms
to 23000 4497 ms
to 24000 4472 ms
to 25000 5285 ms
to 26000 5106 ms
to 27000 5029 ms
to 28000 5199 ms
to 29000 5500 ms
to 30000 5707 ms
to 31000 6037 ms
to 32000 6139 ms
to 33000 6101 ms
to 34000 6348 ms
to 35000 6563 ms
to 36000 6967 ms
to 37000 6785 ms
to 38000 6886 ms
to 39000 7596 ms
to 40000 7350 ms
to 41000 7613 ms
to 42000 7601 ms
to 43000 7701 ms
to 44000 7876 ms
to 45000 8148 ms
to 46000 8469 ms
to 47000 8835 ms
to 48000 8960 ms
to 49000 8939 ms
to 50000 8886 ms
to 51000 9058 ms
to 52000 9269 ms
to 53000 9538 ms
to 54000 10134 ms
to 55000 9980 ms
to 56000 10001 ms
to 57000 10294 ms
to 58000 10291 ms
to 59000 10496 ms
to 60000 10862 ms
to 61000 11166 ms
to 62000 10977 ms
to 63000 11274 ms
to 64000 11351 ms
- --------- END of output ----------
What am I doing wrong ?
Help,
Andreas
- --
In war and programming, all is allowed. But war is not about who is
right, it is about who is left.
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Message 2 in thread
Hello,
how can i achieve that a selection "by code" looks the same as a selection
made by the user? By default a selected item or row (depending on
SelectionBehavior) by a user os highlighted blue. When a select via
QTableVIew::selectRow() or QSelectionModel::select() the selected item/row
is light gray and hardly visible. Am i doing something wrong or am i
forgetting something? I would like both ways to have the same color so its
not visible to the user wether he selected an item or it got selected by the
program.
I am having another problem with selections. I have a QTableView that shows
only one row. When i execute QTableView::selectRow(0) the row gets selected
but also the horizontal header seems to be selected. It look sliek its being
pressed. If the table has more than one row this doesnt occurr.
I am using Qt 4.2 open source version on WinXP VS 2003.
Thanks for yoru help, i really appreciate it
Bastian
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Message 3 in thread
> QTableVIew::selectRow() or QSelectionModel::select() the selected
item/row
> is light gray and hardly visible. Am i doing something wrong or am i
> forgetting something? I would like both ways to have the same color so
its
> not visible to the user wether he selected an item or it got selected
by
> the
> program.
You're probably mixing up current item and selected item(s).
You should change the current item, not only the selection.
Cheers,
Peter
--
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Message 4 in thread
>From: "Peter Prade" <prade@xxxxxxxxxxx>
>To: <qt-interest@xxxxxxxxxxxxx>
>Subject: RE: QAbstractItemView and selection
>Date: Mon, 25 Jun 2007 18:40:04 +0200
>
> > QTableVIew::selectRow() or QSelectionModel::select() the selected
>item/row
> > is light gray and hardly visible. Am i doing something wrong or am i
> > forgetting something? I would like both ways to have the same color so
>its
> > not visible to the user wether he selected an item or it got selected
>by
> > the
> > program.
>
>You're probably mixing up current item and selected item(s).
>You should change the current item, not only the selection.
>
>Cheers,
>Peter
Hi Peter,
i actually thought that was what i had done first, envertheless i tried it
again:
myTableView->selectionModel()->setCurrentIndex(myModel->index(0,0),QItemSelectionModel::SelectCurrent);
This works even worse. My header still seems to be pressed (or selected
somehow), which i cant even reproduce by user interaction. I Cant select or
mark or press the header. Other problem is that now only my item (0,0) of
the table is "gray", not the whole row. setCurrentItem ignores the selection
behavior.
The documentation says that the current item is kind of independant from the
selection and is for userinteraction with the keyboard. Im nto sure that is
what i want :) I just want the row to look like the user selected it with
the mouse (kind of a default selection as one row, and only one, has to be
selected all the time).
I hope you remember what my problem was about as my last posting was 2 days
ago.
I am thankfull for any hint!!!
Bastian
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Message 5 in thread
Hi again, Bastian.
It sounds like your table view has lost focus (can you use the keyboard
to change the selected line, after you set your selection
programmatically?)
Try to also give the focus back to the view. tableView->setFocus()
No idea about the "pressed" table headers though.
Oh and did you check QAbstractItemView::setSelectionBehavior ?
Cheers,
Peter
Bastian Dittmar wrote:
> Hi Peter,
> i actually thought that was what i had done first, envertheless i
tried it
> again:
> myTableView->selectionModel()->setCurrentIndex(myModel-
> >index(0,0),QItemSelectionModel::SelectCurrent);
>
> This works even worse. My header still seems to be pressed (or
selected
> somehow), which i cant even reproduce by user interaction. I Cant
select
> or
> mark or press the header. Other problem is that now only my item (0,0)
of
> the table is "gray", not the whole row. setCurrentItem ignores the
> selection
> behavior.
> The documentation says that the current item is kind of independant
from
> the
> selection and is for userinteraction with the keyboard. Im nto sure
that
> is
> what i want :) I just want the row to look like the user selected it
with
> the mouse (kind of a default selection as one row, and only one, has
to be
> selected all the time).
> I hope you remember what my problem was about as my last posting was 2
> days
> ago.
>
> I am thankfull for any hint!!!
> Bastian
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Message 6 in thread
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Does really noone at all knows anything about this ?
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