Qt-interest Archive, April 2008
In QGridLayout setHorizontalSpacing(-1) does not work
Message 1 in thread
Hello
I want to insert QLables with boundary line to QGridLayout and makes it
look like table.
when just setHorizontalSpacing(0), line thickness doubled between two
adjacent labels.
so when I setHorizontalSpacing(-1), this means two lables overalp by 1
pixel, it does not
produce right result. It restores to default value, 6.
In Qt docs, setHorizonSpacing() function can get int value. There is
something wrong.
Can not negative values be used in parameter of setHorizonSpacing()?
thanks in advance
changwon
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Message 2 in thread
The spacing between two items cannot be negative. If you set a negative
horizontal spacing it will fall back to query for the styles' default
horizntal spacing (which is 6 in some styles).
If I understand you correctly, you are trying to mimic grid lines by
painting a frame along the edges of each label. This is not the
recommended way of doing it, and explains why you get gridlines double
as thick.
You can solve this in several ways, and the simplest way might be to use
a table widget (see QTableWidget::setCellWidget()). It all depends on
your use-case though.
Jan-Arve
changwon lee wrote:
> Hello
> I want to insert QLables with boundary line to QGridLayout and makes it
> look like table.
> when just setHorizontalSpacing(0), line thickness doubled between two
> adjacent labels.
> so when I setHorizontalSpacing(-1), this means two lables overalp by 1
> pixel, it does not
> produce right result. It restores to default value, 6.
> In Qt docs, setHorizonSpacing() function can get int value. There is
> something wrong.
> Can not negative values be used in parameter of setHorizonSpacing()?
>
> thanks in advance
>
> changwon
>
>
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> "unsubscribe" in the subject or the body.
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Message 3 in thread
Jan-Arve Sæther wrote:
> The spacing between two items cannot be negative. If you set a
> negative horizontal spacing it will fall back to query for the styles'
> default horizntal spacing (which is 6 in some styles).
>
> If I understand you correctly, you are trying to mimic grid lines by
> painting a frame along the edges of each label. This is not the
> recommended way of doing it, and explains why you get gridlines double
> as thick.
>
> You can solve this in several ways, and the simplest way might be to
> use a table widget (see QTableWidget::setCellWidget()). It all depends
> on your use-case though.
>
> Jan-Arve
>
> changwon lee wrote:
>> Hello
>> I want to insert QLables with boundary line to QGridLayout and makes
>> it look like table.
>> when just setHorizontalSpacing(0), line thickness doubled between two
>> adjacent labels.
>> so when I setHorizontalSpacing(-1), this means two lables overalp by
>> 1 pixel, it does not
>> produce right result. It restores to default value, 6.
>> In Qt docs, setHorizonSpacing() function can get int value. There is
>> something wrong.
>> Can not negative values be used in parameter of setHorizonSpacing()?
>>
>> thanks in advance
>>
>> changwon
>>
>>
>> --
>> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx
>> with "unsubscribe" in the subject or the body.
>> List archive and information: http://lists.trolltech.com/qt-interest/
>
>
thank you for the answer
The reason why I adopted this method is that cells are not equal size.
It is something like evaluation check sheet as following.
----------------------------------------------------
| header | header |
----------------------------------------------------
| | | | |
| |
----------------------------------------------------
| | | | |
| |
----------------------------------------------------
| header | | |
-----------------------------------------------------
I have no idea how to merge two or several cells in one in table widget
and instead of setting location of each labels, I thought it would be
better to use layout.
After insert lables into QGridLayout and setSpacing(0) for each label is
drawn like this
----------------------------
| | | |
----------------------------
In this case two lines does not overlap, it looks like thicker line
interior of table except boundary of layout.
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