[Android-development] touch-scrolling a custom widget and double-click

[Rutledge Shawn]

AFAIK FlickCharm is what evolved into QScroller, which has been shipped and documented for some time.

On 25 Jul 2015, at 21:39, Sebastian Diel <sdiel at funkmachine.de> wrote:

> Hi Michael & List,
> 
> Am 25.07.2015 um 21:12 schrieb Michael Coffey:
>> Does anyone happen to know if there is a simpler way to do this? I looked at FlickCharm, but that entails a more complicated approach.
> Srsly? Complicated in what respects? 
> 
> Frankly, it's just adding the FlickCharm class into your project and write 3 lines per flickable Widget - as I said, even I managed to do this^^. 
> Works flawlessly on every single one of my QWidget derived classes and I've actually never spent much brainwork on *how* it does this...
> 
> Perhaps I am missing something, but I can't think of a "simpler" solution :) It is LPGL, though, as it is part of the Qt demos. 
> 
> Best Regards, 
> Sebastian
> 
>  
>> 
>> From: Sebastian Diel <sdiel at funkmachine.de>
>> To: Michael Coffey <xaffeine-m at yahoo.com> 
>> Sent: Saturday, July 25, 2015 11:26 AM
>> Subject: Re: [Android-development] touch-scrolling a custom widget and double-click
>> 
>> Hi Michael, 
>> 
>> have you tried the FlickCharm? That one proved so easy to use that even I could work with it :-)
>> (Worked on Android 4x and Windows, no other systems tested)
>> 
>> Use it like this:
>>     FlickCharm *flickCharm = new FlickCharm(this);
>>     flickCharm->setScrollBarVisibility(scrollVisibility);
>>     flickCharm->activateOn(tableWidget);
>> 
>> BR
>> Sebastian
>> 
>> Am 25.07.2015 um 19:08 schrieb Michael Coffey:
>>> 
>>> 
>>> I have developed a widget-based application that works well in linux and Windows. It mostly works in Android, too, but I haven't been able to get scrolling to work right.
>>> 
>>> 
>>> 
>>> Most of my UI is inside a custom subclass of QWidget called GridWidget. This widget sits inside of a QScrollArea, which is also the central widget of my QMainWindow. I have a pointer variable, m_gridWidget, pointing to this custom widget. Some of the children of my GridWidget need to be double-clickable. The GridWidget, itself, needs to flick-scroll.
>>> 
>>> To enable gesture-scrolling, I call QScroller::grabGesture, in a sequence like the following:
>>> QScrollArea * scroller = new QScrollArea();
>>> setCentralWidget( scroller );
>>> m_gridWidget = new GridWidget;
>>> scroller->setWidget( m_gridWidget );
>>> QScroller::grabGesture( centralWidget() );
>>> 
>>> The grabGesture() does enable scrolling but it disables double-clicks on most of the children of the gridWidget. Interestingly, child widgets inside the gridWidget get to see clicks, but they do not see double-clicks. I have a workaround for that subproblem by implementing mouseReleaseEvent for a child widget class.
>>> 
>>> More importantly, flick-scrolling the main widget only works in the part of the widget where there are no child widgets. I want to be able to initiate the gesture anywhere in the region.
>>> 
>>> How can I get this to work on Android? I am currently using QT 5.5 and testing on Android 5.0.2.
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> Android-development mailing list
>>> 
>>> Android-development at qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/android-development
>> 
>> 
>> -- 
>> 
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>> 
>> 
>> 
>> 
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>> Android-development mailing list
>> 
>> Android-development at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/android-development
> 
> 
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