Qt-interest Archive, February 2007
QSlider - Mac behavior different than Windows and Linux
Message 1 in thread
So here's a slider:
-------------------||---------------------
If you click at the x:
------------------||---------x-----------
the slider moves to the position:
----------------------------||-----------
On a mac this emits the signal: sliderPressed() and when you release
the button it emits sliderReleased. So you don't have to click on the
handle, but on Linux and Windows this is not the case. I can think of
ways to fix this but I was wondering if this is the intended behavior
or a bug.
Thanks a lot...
(Forgive the ascii art, I hope it comes through.)
-Willy
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Message 2 in thread
After a short google. About sliders for macs one example:
http://www.blueshoes.org/en/javascript/slider/
# User can change the value in 6 ways:
1. slide
2. click arrow left/right
3. click somewhere into the slider
4. enter a value into the field
5. use an api function to set a value
6. use your mouse wheel (internet explorer only)
So this seems to be normal behaviour for macs (3).
I don't have a non-Qt program on my linus machine with a
slider, but I suppose this is not the normal linux behaviour.
Qt usually tries to follow the native style guides on the
different platforms. I bet that what you found is intended.
Guido
On Wed, Feb 14, 2007 at 05:24:17PM -0500, Willy P wrote:
> So here's a slider:
>
> -------------------||---------------------
>
> If you click at the x:
>
> ------------------||---------x-----------
>
> the slider moves to the position:
>
> ----------------------------||-----------
>
> On a mac this emits the signal: sliderPressed() and when you release
> the button it emits sliderReleased. So you don't have to click on the
> handle, but on Linux and Windows this is not the case. I can think of
> ways to fix this but I was wondering if this is the intended behavior
> or a bug.
>
> Thanks a lot...
>
> (Forgive the ascii art, I hope it comes through.)
>
> -Willy
>
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> "unsubscribe" in the subject or the body.
> List archive and information: http://lists.trolltech.com/qt-interest/
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Message 3 in thread
On 2/14/07, Willy P <willy.lists@xxxxxxxxx> wrote:
> So here's a slider:
>
> -------------------||---------------------
>
> If you click at the x:
>
> ------------------||---------x-----------
>
> the slider moves to the position:
>
> ----------------------------||-----------
>
> On a mac this emits the signal: sliderPressed() and when you release
> the button it emits sliderReleased. So you don't have to click on the
> handle, but on Linux and Windows this is not the case. I can think of
> ways to fix this but I was wondering if this is the intended behavior
> or a bug.
As Guido said, it looks like Qt is simply following the native
platform behavior. On Windows, clicking a native slider (off the
handle) does not immediately move the slider to the mouse press
position. It just moves it by a certain increment (10% maybe). If you
hold the mouse button down, the slider continues to move by increments
until it reaches the mouse position. Qt sliders on Windows do the same
thing.
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Message 4 in thread
Andrew Medico wrote:
> On 2/14/07, Willy P <willy.lists@xxxxxxxxx> wrote:
>> So here's a slider:
>>
>> -------------------||---------------------
>>
>> If you click at the x:
>>
>> ------------------||---------x-----------
>>
>> the slider moves to the position:
>>
>> ----------------------------||-----------
>>
>> On a mac this emits the signal: sliderPressed() and when you release
>> the button it emits sliderReleased. So you don't have to click on the
>> handle, but on Linux and Windows this is not the case. I can think of
>> ways to fix this but I was wondering if this is the intended behavior
>> or a bug.
>
> As Guido said, it looks like Qt is simply following the native
> platform behavior. On Windows, clicking a native slider (off the
> handle) does not immediately move the slider to the mouse press
> position. It just moves it by a certain increment (10% maybe). If you
> hold the mouse button down, the slider continues to move by increments
> until it reaches the mouse position. Qt sliders on Windows do the same
> thing.
>
With Linux, clicking on the slider causes the handle to move by a set
amount called the page increment/decrement. This value can be set.
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Message 5 in thread
Willy P wrote:
> So here's a slider:
>
> -------------------||---------------------
>
> If you click at the x:
>
> ------------------||---------x-----------
>
> the slider moves to the position:
>
> ----------------------------||-----------
>
> On a mac this emits the signal: sliderPressed() and when you release
> the button it emits sliderReleased. So you don't have to click on the
> handle, but on Linux and Windows this is not the case. I can think of
> ways to fix this but I was wondering if this is the intended behavior
> or a bug.
>
> Thanks a lot...
>
> (Forgive the ascii art, I hope it comes through.)
>
> -Willy
Hi Willy,
I posted the same problem some months ago. Here's the thread:
http://lists.trolltech.com/qt-interest/2006-11/msg00363.html
What worked for me was the hint given by Girish Ramakrishnan:
>Create a style proxy
>(http://doc.trolltech.com/qq/qq09-q-and-a.html#style) and return
>Qt::LeftButton for the style hint QStyle::SH_Slider_AbsoluteSetButtons.
Not very intuitive, to say the least ;) I think the argument of "native
platform behavior" really doesn't count here because in some situations
(e.g. using the slider to set the position in audio/video playback)
move-by-increment doesn't make sense.
Btw, the mentioned style hint was added in 4.2.
hth
M
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