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Re: Running QML functions in parallel thread

To: Michael Zanetti <michael.zanetti@xxxxxxxxxxxxx>
From: Николай Шатохин <n.shatokhin@xxxxxxxxx>
Date: Thu, 18 Apr 2013 19:28:29 +0300
Cc: ubuntu-phone <ubuntu-phone@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <5446821.Z1az2lUVaz@noneyet>
This is my git repository:

https://bitbucket.org/nshatokhin/valves.git

And how to connect signals to buttons created by Repeater?


2013/4/18 Michael Zanetti <michael.zanetti@xxxxxxxxxxxxx>

> Doesn't look too bad... so the slowness must be either in the GameButton
> itself or something connected to the the fieldCreated() signal.
>
> Can you push the whole code to some repository? I would be willing to give
> it
> a shot and try to find out whats going wrong.
>
> On Thursday 18 April 2013 18:32:53 Николай Шатохин wrote:
> > I did this:
> >
> >     Grid
> >
> >     {
> >
> >         id: grid
> >
> >         anchors.centerIn: parent
> >
> >         rows: 4
> >
> >         columns: 4
> >
> >         spacing: __buttonRightMargin
> >
> >         Repeater
> >
> >         {
> >
> >             id: buttons
> >
> >
> >             GameButton
> >
> >             {
> >
> >                 row: index % __gameFieldWidth
> >
> >                 column: index / __gameFieldWidth
> >
> >                 width: __buttonWidth
> >
> >                 height: __buttonHeight
> >
> >             }
> >
> >         }
> >
> >     }
> >
> >
> >     onCreateField:
> >
> >     {
> >
> >         grid.rows = fieldHeight;
> >
> >         grid.columns = fieldWidth;
> >
> >         buttons.model = fieldWidth * fieldHeight;
> >
> >
> >         fieldCreated(fieldWidth, fieldHeight);
> >
> >     }
> >
> >
> > Now, I don't see buttons from old field if I start new game with
> > smaller field, but it still so slow.
> >
> >
> >
> > 2013/4/16 Николай Шатохин <n.shatokhin@xxxxxxxxx>
> >
> > > Nope, but very similar by interface
> > >
> > >
> > > 2013/4/16 Roman Shchekin <mrqtros@xxxxxxxxx>
> > >
> > >> MineSweeper?
> > >>
> > >>
> > >> 2013/4/16 Michael Zanetti <michael.zanetti@xxxxxxxxxxxxx>
> > >>
> > >>> On Tuesday 16 April 2013 18:54:01 Michael Zanetti wrote:
> > >>> > As a rule of thumb, you should be able to write more than 90% of
> your
> > >>> > application without the need to the work "function" (game logic
> > >>>
> > >>> excluded).
> > >>>
> > >>> That should have been: ... without the need to use the word
> > >>> "function"...
> > >>>
> > >>> Regards,
> > >>> Michael
> > >>>
> > >>> > > 2013/4/16 Rick Spencer <rick.spencer@xxxxxxxxxxxxx>
> > >>> > >
> > >>> > > > I suppose you would use a loader for the Repeater. After you
> make
> > >>>
> > >>> your
> > >>>
> > >>> > > > repeater work for your first level, you can use QtCreator to
> wrap
> > >>>
> > >>> the
> > >>>
> > >>> > > > Repeater in a loader for you. Then I think for each level you
> > >>> > > > would
> > >>> > > > destroy the whole Repeater and then use the loader to create a
> new
> > >>>
> > >>> one
> > >>>
> > >>> > > > with the new model for the next level.
> > >>> > > >
> > >>> > > > At least that is the approach I would take starting out.
> > >>> > > >
> > >>> > > > HTH
> > >>> > > >
> > >>> > > > Cheers, Rick
> > >>> > > >
> > >>> > > > On Tue, Apr 16, 2013 at 7:31 AM, Николай Шатохин <
> > >>>
> > >>> n.shatokhin@xxxxxxxxx>
> > >>>
> > >>> > > > wrote:
> > >>> > > > > When I create button I assign destroy signal to each. So,
> when I
> > >>>
> > >>> start
> > >>>
> > >>> > > > new
> > >>> > > >
> > >>> > > > > game, I destroying buttons from old game and see old field in
> > >>>
> > >>> this
> > >>>
> > >>> > > > moment -
> > >>> > > >
> > >>> > > > > destroing slow too. Is quickly removing possible? Can I
> destroy
> > >>> > > > > repeater?
> > >>> > > > >
> > >>> > > > >
> > >>> > > > > 2013/4/16 Николай Шатохин <n.shatokhin@xxxxxxxxx>
> > >>> > > > >
> > >>> > > > >> Oh, I didn't know that. I'll try.
> > >>> > > > >>
> > >>> > > > >>
> > >>> > > > >> 2013/4/16 Rick Spencer <rick.spencer@xxxxxxxxxxxxx>
> > >>> > > > >>
> > >>> > > > >>> Hi.
> > >>> > > > >>>
> > >>> > > > >>> I'm not sure how your code flows overall, but if you are
> > >>>
> > >>> creating
> > >>>
> > >>> > > > >>> all
> > >>> > > >
> > >>> > > > the
> > >>> > > >
> > >>> > > > >>> buttons at once, you might consider using a Repeater
> instead
> > >>> > > > >>> of
> > >>> > > > >>> doing
> > >>> > > >
> > >>> > > > it all
> > >>> > > >
> > >>> > > > >>> in javascript.
> > >>> > > > >>>
> > >>> > > > >>> It looks like you might have some kind of list that fires a
> > >>> > > >
> > >>> > > > createButton
> > >>> > > >
> > >>> > > > >>> signal. You could potentially use that list as a model for
> a
> > >>> > > > >>> Repeater
> > >>> > > >
> > >>> > > > and
> > >>> > > >
> > >>> > > > >>> build your buttons in the delegate of the Repeater.
> > >>> > > > >>>
> > >>> > > > >>> Cheers, Rick
> > >>> > > > >>>
> > >>> > > > >>>
> > >>> > > > >>>
> > >>> > > > >>> On Tue, Apr 16, 2013 at 5:11 AM, Николай Шатохин <
> > >>> > > >
> > >>> > > > n.shatokhin@xxxxxxxxx>
> > >>> > > >
> > >>> > > > >>> wrote:
> > >>> > > > >>>> This is my code that creates buttons field:
> > >>> > > > >>>>
> > >>> > > > >>>>
> > >>> > > > >>>> onCreateField:
> > >>> > > > >>>> {
> > >>> > > > >>>>
> > >>> > > > >>>>     for(var i=0;i<fieldWidth;i++)
> > >>> > > > >>>>     {
> > >>> > > > >>>>
> > >>> > > > >>>>         for(var j=0;j<fieldHeight;j++)
> > >>> > > > >>>>         {
> > >>> > > > >>>>
> > >>> > > > >>>>             createButton(i, j);
> > >>> > > > >>>>
> > >>> > > > >>>>         }
> > >>> > > > >>>>
> > >>> > > > >>>>     }
> > >>> > > > >>>>
> > >>> > > > >>>> }
> > >>> > > > >>>>
> > >>> > > > >>>> function createButton(x, y)
> > >>> > > > >>>> {
> > >>> > > > >>>>
> > >>> > > > >>>>     __buttonX = x;
> > >>> > > > >>>>     __buttonY = y;
> > >>> > > > >>>>
> > >>> > > > >>>>     __component = Qt.createComponent("GameButton.qml");
> > >>> > > > >>>>
> > >>> > > > >>>>     if(__component != null)
> > >>> > > > >>>>
> > >>> > > > >>>>         continueButtonCreation();
> > >>> > > > >>>>
> > >>> > > > >>>>     else
> > >>> > > > >>>>
> > >>> > > > >>>>         __component.ready.connect(continueButtonCreation);
> > >>> > > > >>>>
> > >>> > > > >>>> }
> > >>> > > > >>>>
> > >>> > > > >>>> function continueButtonCreation()
> > >>> > > > >>>> {
> > >>> > > > >>>>
> > >>> > > > >>>>     var button = __component.createObject(field, {"row":
> > >>> __buttonY,
> > >>>
> > >>> > > > >>>> "column": __buttonX});
> > >>> > > > >>>>
> > >>> > > > >>>>      if (button == null) {
> > >>> > > > >>>>
> > >>> > > > >>>>          // Error Handling
> > >>> > > > >>>>          console.log("Error creating object");
> > >>> > > > >>>>
> > >>> > > > >>>>          return;
> > >>> > > > >>>>
> > >>> > > > >>>>      }
> > >>> > > > >>>>
> > >>> > > > >>>>      updateValveState.connect(button.stateUpdated);
> > >>> > > > >>>>      button.buttonClicked.connect(buttonClicked);
> > >>> > > > >>>>
> > >>> > > > >>>>      field.clearField.connect(button.release);
> > >>> > > > >>>>
> > >>> > > > >>>> }
> > >>> > > > >>>>
> > >>> > > > >>>>
> > >>> > > > >>>> fieldWidth = fieldHeight = 16;
> > >>> > > > >>>>
> > >>> > > > >>>>
> > >>> > > > >>>> 2013/4/16 Alex Tyler <alex.tyler@xxxxxxxxxx>
> > >>> > > > >>>>
> > >>> > > > >>>>> Can we see some code? The only time Images hang for me in
> > >>>
> > >>> QML is
> > >>>
> > >>> > > > >>>>> when
> > >>> > > > >>>>> it's trying to load them synchronously. Try setting
> > >>>
> > >>> asynchronous
> > >>>
> > >>> > > > >>>>> to
> > >>> > > >
> > >>> > > > true.
> > >>> > > >
> > >>> > > > >>>>> Cheers,
> > >>> > > > >>>>> Alex
> > >>> > > > >>>>>
> > >>> > > > >>>>> On Tue, Apr 16, 2013 at 10:20 AM, <mrqtros@xxxxxxxxx>
> wrote:
> > >>> > > > >>>>>> I thought Nick creates 1024 (16x16) buttons, lol =) And
> > >>>
> > >>> even did
> > >>>
> > >>> > > > >>>>>> not
> > >>> > > > >>>>>> thought - for what :D
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> Of course code is extremely bad, if buttons with size
> 16x16
> > >>> > > > >>>>>> pixels
> > >>> > > > >>>>>> creating slowly.
> > >>> > > > >>>>>>
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> 16.04.13 12:09 Michael Zanetti написал(а):
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> On Tuesday 16 April 2013 01:01:28 Николай Шатохин wrote:
> > >>> > > > >>>>>> > Hello.
> > >>> > > > >>>>>> >
> > >>> > > > >>>>>> > In my code I'm creating 16x16 buttons in cycle and
> this
> > >>>
> > >>> take
> > >>>
> > >>> > > > >>>>>> > few
> > >>> > > > >>>>>> > seconds.
> > >>> > > > >>>>>> > While function that creating buttons runs, app
> freezes. I
> > >>>
> > >>> want
> > >>>
> > >>> > > > >>>>>> > to
> > >>> > > > >>>>>> > show
> > >>> > > > >>>>>> > loading animation while this function runs. So, how to
> > >>>
> > >>> run this
> > >>>
> > >>> > > > >>>>>> > function in
> > >>> > > > >>>>>> > parallel thread to avoid freezing?
> > >>> > > > >>>>>> >
> > >>> > > > >>>>>> > Best regards,
> > >>> > > > >>>>>> > Nick
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> Creating 16x16 buttons shouldn take a few seconds. Can
> you
> > >>>
> > >>> paste
> > >>>
> > >>> > > > >>>>>> the
> > >>> > > > >>>>>> code
> > >>> > > > >>>>>> (also the button itself). To me it seems the issue is
> > >>>
> > >>> somewhere
> > >>>
> > >>> > > > else,
> > >>> > > >
> > >>> > > > >>>>>> e.g. in
> > >>> > > > >>>>>> the way you create the buttons or the buttens themselves
> > >>>
> > >>> are very
> > >>>
> > >>> > > > >>>>>> slow.
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> Br,
> > >>> > > > >>>>>> Michael
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> --
> > >>> > > > >>>>>> Mailing list: https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>>>> Post to : ubuntu-phone@xxxxxxxxxxxxxxxxxxx
> > >>> > > > >>>>>> Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>>>> More help : https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>>>>
> > >>> > > > >>>>>>
> > >>> > > > >>>>>>
> > >>> > > > >>>>>> --
> > >>> > > > >>>>>> Mailing list: https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>>>> Post to     : ubuntu-phone@xxxxxxxxxxxxxxxxxxx
> > >>> > > > >>>>>> Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>>>> More help   : https://help.launchpad.net/ListHelp
> > >>> > > > >>>>
> > >>> > > > >>>> --
> > >>> > > > >>>> Mailing list: https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>> Post to     : ubuntu-phone@xxxxxxxxxxxxxxxxxxx
> > >>> > > > >>>> Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >>> > > > >>>> More help   : https://help.launchpad.net/ListHelp
> > >>> > > > >>>
> > >>> > > > >>> --
> > >>> > > > >>> Mailing list: https://launchpad.net/~ubuntu-phone
> > >>> > > > >>> Post to     : ubuntu-phone@xxxxxxxxxxxxxxxxxxx
> > >>> > > > >>> Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >>> > > > >>> More help   : https://help.launchpad.net/ListHelp
> > >>> > > >
> > >>> > > > --
> > >>> > > > Mailing list: https://launchpad.net/~ubuntu-phone
> > >>> > > > Post to     : ubuntu-phone@xxxxxxxxxxxxxxxxxxx
> > >>> > > > Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >>> > > > More help   : https://help.launchpad.net/ListHelp
> > >>>
> > >>> --
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> > >>> Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >>> More help   : https://help.launchpad.net/ListHelp
> > >>
> > >> --
> > >> Mailing list: https://launchpad.net/~ubuntu-phone
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> > >> Unsubscribe : https://launchpad.net/~ubuntu-phone
> > >> More help   : https://help.launchpad.net/ListHelp
>
Follow ups

Re: Running QML functions in parallel thread
From: Michael Zanetti, 2013-04-18
Re: Running QML functions in parallel thread
From: Michał Sawicz, 2013-04-18
References

Running QML functions in parallel thread
From: Николай Шатохин, 2013-04-15
Re: Running QML functions in parallel thread
From: Николай Шатохин, 2013-04-16
Re: Running QML functions in parallel thread
From: Николай Шатохин, 2013-04-18
Re: Running QML functions in parallel thread
From: Michael Zanetti, 2013-04-18