[Interest] PropertyAction doesn't work with anchors

[Tomasz Olszak]

2015-08-06 7:55 GMT+02:00 Ruslan Moukhlynin <ruslan at khvmntk.ru>:
> Yes, but that isn't mandatory.
> Anyway what can I do if I don't want animation but immediate change?
>
>
> 06.08.2015 14:43, Dmitry Volosnykh пишет:
>
> When using AnchorChanges in states, you should refer to AnchorAnimation in
> transitions. See http://doc.qt.io/qt-5/qml-qtquick-anchoranimation.html
>
> On Thu, Aug 6, 2015 at 1:58 AM, Ruslan Moukhlynin <ruslan at khvmntk.ru> wrote:
>>
>> Unfortunately that doesn't work too.
>> I've tried:
>>
>> in states:
>> ...
>> AnchorChanges {
>>     target: rect
>>         anchors {
>>             top: undefined
>>             bottom: parent.bottom
>>         }
>> }
>> ...
>>
>> and so, in transitions:
>>
>> ...
>> PropertyAction {
>>     target: rect
>>     properties: "anchors"
>> }
>> ...
>>
>>
>>
>> 05.08.2015 17:52, Dmitry Volosnykh пишет:
>>
>> What if you specify a single property: "anchors" and set it to object
>> value: { "bottom": 100; "top": 100 }
>>
>> PS. Just a suggestion. Have not done something similar by myself.
>>
>> On Wed, Aug 5, 2015 at 2:33 AM, Ruslan Moukhlynin <ruslan at khvmntk.ru>
>> wrote:
>>>
>>> Suppose we have following code:
>>>
>>> Rectangle {
>>>
>>>     id:  rect
>>>
>>>     width: 100
>>>
>>>     height: 100
>>>
>>>
>>>
>>>     MouseArea {
>>>
>>>         anchors.fill: parent
>>>
>>>         onClicked: {
>>>
>>>             rect.state = "state1"
>>>
>>>         }
>>>
>>>     }
>>>
>>>
>>>
>>>     states: [
>>>
>>>         State {
>>>
>>>             name: "state1"
>>>
>>>             AnchorChanges {
>>>
>>>                 target: rect
>>>
>>>                 anchors.bottom: parent.bottom
>>>
>>>                 anchors.top: undefined
>>>
>>>             }
>>>
>>>             PropertyChanges {
>>>
>>>                 target: rect
>>>
>>>                 color: "red"
>>>
>>>             }
>>>
>>>         }
>>>
>>>     ]
>>>
>>>     transitions: [
>>>
>>>         Transition {
>>>
>>>             SequentialAnimation {
>>>
>>>                 PropertyAction {
>>>
>>>                     target: rect
>>>
>>>                     properties: "anchors.bottom,anchors.top"
>>>
>>>                     value: "100"
>>>
>>>                 }
>>>
>>>                 PropertyAnimation {
>>>
>>>                     target: rect
>>>
>>>                     property: "color"
>>>
>>>                     duration: 1000
>>>
>>>                 }
>>>
>>>             }
>>>
>>>         }
>>>
>>>     ]
>>>
>>> }
>>>
>>>
>>> anchors should be changed immediately but that not happens.
>>> PropertyAction works fine with some another properties but not with anchors.
>>> --
>>> With best regards,
>>> Ruslan Moukhlynin
>>>
>>> _______________________________________________
>>> Interest mailing list
>>> Interest at qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/interest
>>>
>>
>>
>> --
>> With best regards,
>> Ruslan Moukhlynin
>>
>> _______________________________________________
>> Interest mailing list
>> Interest at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/interest
>>
>
>
> --
> With best regards,
> Ruslan Moukhlynin
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>

Instead of PropertyAction try to use

AnchorAnimation {duration: 0}

or

ScriptAction {
    script: {
        rect.anchors.bottom = Qt.binding(function(){return rect.parent.bottom})
        rect.anchors.top = Qt.binding(function(){return rect.parent.top})
    }
}

or

place

anchors.bottom: rect.parent.bottom
anchors.top: rect.parent.top

in PropertyChanges

I don't know the details but seems like AnchorChanges is not superset
od PropertyChanges but rather something similar. I had some issues
with some specific edge cases it in the past but there are always at
least a few ways to workaround.