[Qt-interest] Multi Gesture

[Wathek LOUED]

Sean,

Thank you for your response, I'd like to ask you if you got an idea how can
I do to know to know which touch points are handled by which gesture
recognizer because you know let's say I got two objects so two different
instance of my gesture recognizer but the problem is that I don't think that
I need to send all the time all the touched points to the gesture recognizer
I need just to send the touched point that are contained into the object.
You see what I mean ?

Sincerely
W.L

On Sun, Mar 20, 2011 at 7:59 PM, Sean Hayes <sean.t.hayes at vanderbilt.edu>wrote:

> Wathek,
>
> You are right, you only get the QGesture that is given to
> the QGestureRecognizer and you cannot create two separate gestures of the
> same type (as far as I know). I did not think about that before. However, a
> unique QGesture is given to each QGestureRecognizer. Also,
> each QGestureRecognizer receives all the events that all the
> other QGestureRecognizers receive. Therefore, you should be able to have
> simultanious gestures limited only by the number of
> registered QGestureRecognizers.
>
> I have never tried this with the same gesture type, but you should be able
> to get two gestures of the same type by registering two instances of that
> gesture recognizer. This may only work for custom gestures (not the Qt's
> built in ones) because each regestered QGestureRecognizer may need a unique
> Qt::GestureType. That is just speculation. I am not sure how practical this
> idea is, but I suspect it would work.
>
> Let me know what you think.
>
> Sean
>
>
> On Sun, Mar 20, 2011 at 12:36 PM, Wathek LOUED <wathek at gmail.com> wrote:
>
>> Sean,
>>
>> Yes but the problem is that since that QGestureRecognizer doesn't free the
>> QGesture and it uses always the same QGesture it only resets it I cannot
>> have two (or more) same gestures at the same time.
>>
>> Let's say that the gesture is a Tap and Hold so it needs about 700ms
>> without moving to recognize the gesture. So first touched Point the
>> GestureRecognizer setted the QGesture parameters (Position, Timer, etc). At
>> 400ms a second Touched Point arrived, the GestureRecognizer cannot do
>> anything since it's busy with the first one. You see ?
>>
>>
>> On Sun, Mar 20, 2011 at 5:44 PM, Wathek LOUED <wathek at gmail.com> wrote:
>>
>>> I see I got an other question. I'd like to know when the
>>> QGestureRecognizer changes the QGesture::state to
>>> QGestureRecognizer::CancelGesture or QGestureRecognizer::FinishGesture is
>>> the QGesture killed ?
>>>
>>>  On Sun, Mar 20, 2011 at 3:53 PM, Sean Hayes <
>>> sean.t.hayes at vanderbilt.edu> wrote:
>>>
>>>> Wathek,
>>>>
>>>> You could probably do  this by created you own gesture classes that
>>>> subclass QGesture. The key would be how you recognize the gestures in your
>>>> gesture recognizer. For example, you could monitor all the touch points
>>>> received and see any one of them match your gestures (as opposed to only
>>>> checking the first point or two). If you are use some gestures that utilize
>>>> more than one touch point, you could test if any combinational of two points
>>>> matches your gesture.
>>>>
>>>> Sean
>>>>
>>>> On Sun, Mar 20, 2011 at 7:38 AM, Wathek LOUED <wathek at gmail.com> wrote:
>>>>
>>>>> Hi all,
>>>>>
>>>>> I was thinking how can I do to get a multi gesture ? let's say a finger
>>>>> to do a Tap And Hold Gesture and another finger where the user does a Pan
>>>>> Gesture. Using the QGesture of Qt it won't work. Any idea how can I do so
>>>>> that it'll be possible ?
>>>>>
>>>>> Thank you
>>>>>
>>>>> Sincerely
>>>>> Wathek
>>>>>
>>>>> _______________________________________________
>>>>> Qt-interest mailing list
>>>>> Qt-interest at qt.nokia.com
>>>>> http://lists.qt.nokia.com/mailman/listinfo/qt-interest
>>>>>
>>>>>
>>>>
>>>
>>
>
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