[Qt-qml] problem with transitions

[Gianni Valdambrini]

michael.brasser at Nokia.com ha scritto:
> Hi,
> 
> On 20/04/2010, at 8:06 PM, ext Gianni Valdambrini wrote:
>> I wrote a custom element that looks like a text element with a slide
>> effect on the text change.
>> The problem is in the transition. The element works in this way:
>> there are 2 text elements, one placed on the left and the other on the
>> right of the element. The latter has the same left and right anchor in
>> order to hide the element.
>> When the text changes the transition expands the text on the right
>> changing its left anchor and shrinks the left one.
>> Everything seems to work fine if I disable the transition, with the text
>> on the right not visibile. Using the old version of Qml from Qt Creator 
>> Qml 1.3.8 everything works fine even with transition enable (replacing 
>> "properties" with "matchProperties" and the easing syntax), so I cannot 
>> figure out what is wrong with this code.
>> Any help is appreciated.
> 
> In the past couple weeks there have been quite a few changes to AnchorChanges, and an AnchorAnimation element has been introduced. After updating your example to the latest syntax, I wasn't able to see any obvious issues. Are you able to update your build and see if it is working right for you?
> 
> Regards,
> Michael

Unfortunately, It doesn't (with Qt from the branch 4.7-stable).
I made a few changes to the element to update it to the last sintax, but 
the result is the same than the previous version. Running the code, I 
noticed these things:
- In the initial status, the element text2 is visible but it shouldn't.
- there are 2 transitions, from the initial state to the state1 and from 
the state2 to the state3. In theory, these transitions should be the 
same, but this is not what happens.

Other notes:
- In the AnchorAnimation I can't specify the duration, so at the moment 
it isn't exactly what I need.
- In the transition, I can't change the state using PropertyAction, 
unless it is used with an animation (as in the code), otherwise I get 
the error "Can't apply a state change as part of a state definition.".

Thank you,
Gianni
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