[Interest] simulating pinch

[Christopher Probst]

unfortunately, the touchEvent does not seem to interact at all with the
PinchArea. What am I doing wrong?

On 10 January 2018 at 17:01, Christopher Probst <christop.probst at gmail.com>
wrote:

> Hi Shawn,
>
> Based on the example you provided I wrote this QML code and wanted to see
> if this does indeed simulate a pinch.
>
>    //pinchArea is PinchArea QML type
>
>    var pinchSequence = touchEvent( pinchArea );
>
>       //first finger
>
>    pinchSequence.press(0, pinchArea, 80, 80)
>
>    pinchSequence.commit();
>
>
>    pinchSequence.stationary(0)
>
>
>    //second finger
>
>    pinchSequence.press(1, pinchArea, 100, 100);
>
>    pinchSequence.commit();
>
>    //outward pinch or zoom
>
>   pinchSequence.move(0, pinchArea, 70, 70);
>
>   pinchSequence.move(1, pinchArea, 110, 110);
>
>   pinchSequence.commit();
>
>
>
>
> On 10 January 2018 at 15:18, Christopher Probst <christop.probst at gmail.com
> > wrote:
>
>> Thank-you Shawn, this is very helpful, I am going to try to use both
>> testing approaches one in QML and one in C++. And I will post here what
>> happens. But thanks again!
>>
>> On 10 January 2018 at 15:04, Shawn Rutledge <Shawn.Rutledge at qt.io> wrote:
>>
>>>
>>> On Jan 9, 2018, at 18:21, Christopher Probst <christop.probst at gmail.com>
>>> wrote:
>>>
>>> Hello,
>>>
>>> I am trying to use the QML test framework to simulate a pinch. The API
>>> which is here
>>>
>>> http://doc.qt.io/qt-5/qml-qttest-testcase.html
>>>
>>> does not provide any methods to simulate a pinch. This seems like an
>>> oversight.
>>>
>>> There is code that shows how to do this here:
>>>
>>> http://code.qt.io/cgit/qt/qtdeclarative.git/tree/tests/auto/
>>> quick/qquickpincharea/tst_qquickpincharea.cpp
>>>
>>>
>>> A pinch is a touch event with two touch points.  You can see how QTest::touchEvent
>>> is started on line 222 for example, on line 234 it moves both touch points
>>> simultaneously, etc.  So that’s an example of how to write a pinch test in
>>> C++ (which I recommend, if you can: mainly because the C++ debugger is
>>> nicer to use than the QML one, IMO, and tests always seem to end up needing
>>> debugging at some point).
>>>
>>> If you want to write the test in QML, see http://doc.qt.io/qt-5/qml-
>>> qttest-testcase.html#touchEvent-method and http://code.qt.io/cgit/qt/
>>> qtdeclarative.git/tree/tests/auto/qmltest/events/tst_touch.qml#n146
>>>
>>>
>>
>
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