[Interest] Pan text in QPlainTextEdit with one finger?

[Igor Mironchik]

> Hi.
>
> In QPlainTextEdit::event( QEvent * e )
>
> I've found the next code:
>
> #ifndefQT_NO_GESTURES
>      else  if  (e->type()  ==  QEvent::Gesture)  {
>          QGestureEvent  *ge  =  static_cast<QGestureEvent  *>(e);
>          QPanGesture  *g  =  static_cast<QPanGesture  *>(ge->gesture(Qt::PanGesture));
>          if  (g)  {
>              QScrollBar  *hBar  =  horizontalScrollBar();
>              QScrollBar  *vBar  =  verticalScrollBar();
>              if  (g->state()  ==  Qt::GestureStarted)
>                  d->originalOffsetY  =  vBar->value();
>              QPointF  offset  =  g->offset();
>              if  (!offset.isNull())  {
>                  if  (QApplication::isRightToLeft())
>                      offset.rx()  *=  -1;
>                  //  QPlainTextEdit  scrolls  by  lines  only  in  vertical  direction
>                  QFontMetrics  fm(document()->defaultFont());
>                  int  lineHeight  =  fm.height();
>                  int  newX  =  hBar->value()  -  g->delta().x();
>                  int  newY  =  d->originalOffsetY  -  offset.y()/lineHeight;
>                  hBar->setValue(newX);
>                  vBar->setValue(newY);
>              }
>          }
>          return  true;
>      }
> #endif  //  QT_NO_GESTURES
>
> It told to me that QPlainTextEdit should support "pan gesture" and text should be paned with
> fingers. But in my test app when I move finger in QPlainTextEdit I receive selection of the text.
> And I saw that in event( QEvent * e ) method appear QEvent::InputMethodQuery event instead of
> QEvent::Gesture.
>
> But with two fingers I receive sometimes QEvent::Gesture and text scrolled but in wrong direction.
> It's ugly to not to have scrolling with one finger. May be we should post suggestion to the
> bugreports.qt-project.org?
>
> Any ideas?!

Sorry. Direction is correct.

>
>
>> Hi,
>> sorry for 3rd posting about same issue. I didn't know the right
>> mailing list.
>>
>>
>> I have tried it several hours and get only a pan gesture with two 
>> fingers,
>> with text selection (what I not want).
>>
>> I have used QPlainTextEdit, QTextEdit - with Qt Designer or subclass 
>> (grabGesture(Qt::PanGesture)) -
>> in a simple 'MainWindow' (c++).
>> (I have tried the gesture source code from the QPLainTextEdit 'event' 
>> function.)
>>
>> I got never the result like with the 'aboutQt' (QMessageBox) call.
>>
>> I have Installed:
>> Qt 5.2.0 for Android (Windows 32-bit, 761 MB),
>> Asus MeMO Pad HD 7 (Android 4.2.2),
>> Samsung Galaxy S4 mini (Android 4.2.2)
>>
>> I want to show results in a QPlainTextEdit or QTextEdit without text 
>> selection, but pan
>> up and down (and it would be nice, left and right).
>>
>> Can somebody help me, please?
>>
>> Thanks,
>>     Thomas
>>
>>
>> _______________________________________________
>> Interest mailing list
>> Interest at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/interest
>
> -- 
> Best Regards,
> Igor Mironchik.

-- 
Best Regards,
Igor Mironchik.

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