[Qt-interest] How do I turn-off/hide the text cursor in QSpinBox?

[Atlant Schmidt]

All:

  Thanks for all the help, everyone!

  As it turns out, to work-around various other
  limitations in the Q(Abstract)SpinBox implementation
  when it's used on touch-screens, we already did have
  QSpinBox subclassed and had already been assigning
  a new QLineEdit to the subclass.

  So by Friday afternoon, I was doing exactly what has
  been suggested and attempting to set just the QLineEdit
  to "Read Only". Done in the QSpinBox constructor (after
  we've done the setLineEdit() to substitute our own
  QLineEdit instance), this didn't work; some initialization
  farther down the road clears the Read-Only status.

  Today, I took a big hammer and simply re-asserted the
  Read-Only status with every step taken by the spin-box:

    lineEdit()->setReadOnly(true);


  That works.

  But when I look at all the work we've done to make
  spin boxes work for us (in our touch screen environment),
  I'm pretty sure we'd have been better-off if we hadn't
  used Q(Abstract)SpinBox at all and simply used two of
  our "Sound-making pushbuttons" and a QLabel to display
  the results.

  There really needs to be a simple class for Spinboxes
  on touchscreens that doesn't carry all the burdens of
  this QLineEdit-based class.

                          Atlant


-----Original Message-----
From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of Bo Thorsen
Sent: Friday, April 01, 2011 02:12
To: Sean Harmer
Cc: qt-interest at qt.nokia.com
Subject: Re: [Qt-interest] How do I turn-off/hide the text cursor in QSpinBox?

Den 31-03-2011 23:16, Sean Harmer skrev:
> Hi,
>
> On 31/03/2011 20:53, Atlant Schmidt wrote:
>> Sean:
>>
>>     First thing I tried! ;-)
>>
>>     Unfortunately, that also makes the entire spin-box
>>     read-only; not only can't you edit the text of the
>>     value, you can't change it's value by pressing
>>     the buttons either.
>
> Hmmm, if you still want to be able to use the button to change the value
> but not the line edit (since you said it is purely a touch app) then one
> approach is to subclass QSpinBox and in the constructor of your
> subclass, use the protected QAbstractSpinBox::lineEdit() function to get
> a pointer to the line edit sub-control and then call setReadOnly( true )
> on that.

Or a bit simpler perhaps?

spinbox->findChildren<QLineEdit*>().at(0)->setReadOnly(true);

Bo Thorsen,
Fionia Software.

--

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