[Qt-interest] Timer objects conflicting
Yuvaraj R
yuvaraj at ongobiz.com
Thu Aug 13 06:18:08 CEST 2009
Thanks Alex
I don't have idea to switch timer values.
Can you provide me a sample code ?
Thanks
Yuvaraj R
On Thu, Aug 13, 2009 at 7:04 AM, Malyushytsky, Alex <alex at wai.com> wrote:
> 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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