[Qt-interest] Timer objects conflicting
Mikhail Veygman
mveygman at gmail.com
Thu Aug 13 16:25:14 CEST 2009
It's Mikhail.
If you need to time the buttons separately and need to know how much
time the timer was active set a second list of values that will save
that amount. First click will set the flag and start incrementing,
second click will clear the flag and stop incrementing.
If the first suggestion doesn't work for you try the second.
-
Regards,
Mikhail Veygman
-----Original Message-----
From: Yuvaraj R <yuvaraj at ongobiz.com>
To: Mikhail Veygman <mveygman at gmail.com>
Cc: Malyushytsky, Alex <alex at wai.com>, qt-interest at trolltech.com
<qt-interest at trolltech.com>
Subject: Re: [Qt-interest] Timer objects conflicting
Date: Thu, 13 Aug 2009 19:06:05 +0530
Veygman
AS per your first suggestion,
ok , i am use single timer. if i someting upadated in object.,i set the
flag ..
But ,i need two buttons timer value separately..That's why i am creating
new objects..
any other idea ?
Thanks
Yuvaraj R
On Thu, Aug 13, 2009 at 6:12 PM, Mikhail Veygman <mveygman at gmail.com>
wrote:
Yuvaraj,
As Alex has stated the "conflict" doesn't explain the problem
you are
having and further doesn't specify the symptoms of the problem,
which
are needed.
Looking at the code, however, I think you need to change the
design of
your application the reason being is: I would assume that you
have only
one instance of the Form class and all the timers are created
through it
so you are calling the same slot in the same object, so my
suggestion
for you would be 1 of the 2 things:
1. Use a single timer and just have a list of flags on whether
something needs to be updated within the object and then update
it based
on the flag being set to true.
2. Break up data handling into separate objects and create the
timer
within the object so you are not attempting to update parameters
within
the same object.
-
Regards,
Mikhail Veygman
-----Original Message-----
From: Malyushytsky, Alex <alex at wai.com>
To: qt-interest at trolltech.com <qt-interest at trolltech.com>
Subject: Re: [Qt-interest] Timer objects conflicting
Date: Wed, 12 Aug 2009 18:34:42 -0700
Thiago is right about static variable initialization and since
your code mostly likely assumes that initial count should be 0,
it is mostly likely not a problem here. It still might be a
problem in other cases. I can only guess.
I believe it is preferable to initialize static variable of the
basic types (no constructors) even if it should be initialized
to 0.
This will clearly state for the person reviewing your code that
you did not forget to do it.
Comment can be used to get the same effect, but "= 0" is
shorter.
This is more related to the style and I would not probably
mentioned this, if code posted was not so hard to read due to
lack indentation already.
Back to the problem.
As it was pointed already by John, the "conflict" does not
explain the problem.
More of that, it is not clear what was intended to do.
You explanation does not provide information what you are trying
to achieve.
It gives description how you are doing it.
Since there are endless possibilities "What" you want to achieve
it is tough to help you.
For example if you wanted to show time passed from the click on
the last button,
The only single timer supposed to be running at any time.
You have to stop previously running timer (if any), create a new
one and change data to be displayed.
If you have parallel processes running, timers represents each
process and click of the specific button just supposed to
switching the data displayed into specific control, you do need
multiple timers.
But only one timer at a time supposed to display the data, the
one associated with specific process/button.
Regards,
Alex
-----Original Message-----
From: qt-interest-bounces at trolltech.com
[mailto:qt-interest-bounces at trolltech.com] On Behalf Of John
McClurkin
Sent: Wednesday, August 12, 2009 5:30 AM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] Timer objects conflicting
Yuvaraj R wrote:
> Alex
>
> I am explaining my problem here..
>
>
> I am creating new object for Timer .whenever i am clicking the
push
> button .I have set the timer timer interval 1000 sec..
>
> If timeout signal is emitted it will run_timer slot..
>
> Here i am counting the seconds and send to my main window...
>
>
> What my thing is ,when i am creating the second object for
timer,it is
> conflicting with object 1..
Your statement is still not helpful because you don't describe
what the
conflict is. So, I'll try with a couple of questions. 1) What
happens
when you just click push button 1? 2) What happens when you
click push
button 1 then click push button 2? 3)How is this different from
what you
want to happen?
>
> And more thing.. How come i know,which object is emitting the
timeout signal
You can use the sender() function in the run_timer slot. See the
Qt
documentation.
>
>
>
> Thanks
>
> Yuvaraj R
>
> On Wed, Aug 12, 2009 at 4:55 AM, Malyushytsky, Alex
<alex at wai.com
> <mailto:alex at wai.com>> wrote:
>
> I am not sure I followed what you were trying to achieve.
> I could assume something, based on your explanation, but
if you want
> correct answer you need to ask correct question.
> What is worth "objects are conflicting.. " gives no
explanation of
> the problem you are facing.
> Code provided does not give sufficient details to
understand it.
> It might be a good idea to spend more formulating question
if you
> want help.
>
> The only thing I can say right now:
> - static int count; is not initialized
> - time[count] = new QTimer; may create a problem depending
on the
> container you are using.
>
> Regards,
> Alex
>
>
>
> From: qt-interest-bounces at trolltech.com
> <mailto:qt-interest-bounces at trolltech.com>
> [mailto:qt-interest-bounces at trolltech.com
> <mailto:qt-interest-bounces at trolltech.com>] On Behalf Of
Yuvaraj R
> Sent: Tuesday, August 11, 2009 1:30 PM
> To: qt-interest
> Subject: [Qt-interest] Timer objects conflicting
>
> Hi All
>
> I have 10 items in list view.. Each widget containing the
push
> button and label..
>
> when push button is clicked the Timer is running ..suppose
if click
> the first item push button timer value is display at
label..After
> some times again i am clicking second push button... this
item value
> also i have to display..
>
> whenever user clicking the button, new object will be
creating for
> QTimer..Here my problem is objects are conflicting..
>
> My code is
>
> void Form::get_timer(int id)
> {
> static int count;
> qDebug() << "yuvaraj";
> time[count] = new QTimer;
> time[count]->start(1000);
>
QObject::connect(time[count],SIGNAL(timeout()),this,SLOT(run_timer()));
> count++;
> }
> void Form::run_timer()
> {
> qDebug() << "yuvaraj 1";
> QString time_count;
> if(b==59 )
> {
> b=0;
> a++;
> }
> if(a<10 && b<10 )
> {
> time_count = QString(QString::number(0)+QString::number(a)
+
> ":"+QString::number(0)+QString::number(b));
> }
> if(a<10 && b >=10)
> {
> time_count = QString(QString::number(0)+QString::number(a)
+
> ":"+QString::number(b));
> }
> if(a>=10 && b <10)
> {
> time_count = QString(QString::number(a) +
> ":"+QString::number(0)+QString::number(b));
> }
> if(a>=10 && b>=10)
> {
> time_count = QString(QString::number(0)+QString::number(a)
+
> ":"+QString::number(b));
> }
> b++;
> emit send_timer(count,time_count);
> }
>
> // slot for send_timer signal
> void MainWindow:: get_timer(int item,QString str)
> {
> qDebug() << "yuvaraj" << str << item;
> for(int i=0;i<list..size();i++)
> {
> if(i == list_item_id[item])
> {
> list.at
<http://list.at/>(i)->m_ui->set_time->setText(str);
> }
> }
>
> Please help me ,how do avoid the object conflicting
>
>
> Thanks
>
>
> Yuvaraj R
>
>
>
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