Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Bernd Vogelgesang]

Am 27.10.2016, 00:12 Uhr, schrieb Nyall Dawson :



On 27 Oct 2016 7:18 AM, "Bernd Vogelgesang"   
wrote:


Am 26.10.2016, 22:57 Uhr, schrieb Nyall Dawson :

On 27 Oct 2016 6:51 AM, "Bernd Vogelgesang"   
wrote:

>
> Arghh, sorry for the noise!
>
> When hovering over the data-driven input button not so hectically, I  
discovered the explanation that it expects a 0 or 1.

> So
> case when> 'mypath'|| @atlas_pagename ||'_1.jpeg' IS NULL
> THEN
> 0
> END
>
> did the trick!

This is odd... A null picture expression should be rendered empty, not  
as the red cross. The red cross is intended only as an >obnoxious,  
obvious indicator that a picture path was set but couldn't be found.


The expression above would only result in 0 if @atlas_pagename is null.

Nyall



Well, yeah, I was too early to announce the solution. In fact this did  
not render the missing image, but also not the one which is >there :(


case when 
'/media/Daten/IVL_Projekte/2016024_Feldhamster_NEA/2_EINGANG_MA/Bernd/QGIS/Fotos/'||  
@atlas_pagename ||'_1.jpeg' IS NULL

THEN
1
ELSE
0
END

This should do it. But now I am again where is started: When the image  
is there, it is rendered, when not, the red cross is >exported as well.


That's because that expression is just testing whether the concatenated  
string itself is null, not whether the corresponding file >actually  
exists.


My advice: make a small python custom function 'file_exists' which  
checks for the existence of a file. Then change your picture path  
>expression to something like:


Case when file_exists( 'media/' ... Etc) then  'media/' ... Else null end

That should get you the result you are after.

Nyall


Hi Nyall,

unfortunately, I have still no clue of python.
I now added blank images for the missing ones :(

I think I will at least file a bug report for the red cross not being  
rendered.


Thanx for your attention
Bernd




:(

Bernd


>
> Just amazing!!!>
> Thanx
> Bernd
>
> Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :
>
>> Hi,
>> what about using the data-defined option near the "Exclude items  
from export" in the items properties --> Rendering (with a >case when  
expression)?
>>  
http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode

>>
>> HTH,
>> Harrissou
>>
>> 2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang  
:

>>>
>>> Hi,
>>> I set up a neat atlas for displaying a row of 50 sample plots. On  
a second page, I want to show 2 pictures taken of these >plots  
automatically with an expression including the path ||  
@atlas_pagenumber || '_1.jpeg' or '_2.jpeg' to display up to two  
photos >named e.g. 1_1.jpeg, 1_2.jpeg.

>>>
>>> This works really great! The problem is, that for some plots, we  
do not and have any picture or only one. In composer, these >missing  
images are marked with a big red cross.
>>> Unfortunately, these red crosses are also exported, which looks  
quite shitty.

>>>
>>> Is there any clever way of forcing QGIS not to export these place  
holders but just not to print anything at this place?

>>>
>>> The only (boring) idea I came up with till now, was to create  
empty white images and name them accordingly to avoid the red >crosses.

>>>
>>> Thanx
>>> Bernd
>>>
>>> -->>> Bernd Vogelgesang
>>> Siedlerstraße 2
>>> 91083 Baiersdorf/Igelsdorf
>>> Tel: 09133-825374
>>> ___
>>> Qgis-user mailing list
>>> Qgis-user@lists.osgeo.org
>>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>>
>
>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user





--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374




--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374___
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Nyall Dawson]

On 27 Oct 2016 7:18 AM, "Bernd Vogelgesang" 
wrote:
>
> Am 26.10.2016, 22:57 Uhr, schrieb Nyall Dawson :
>
>> On 27 Oct 2016 6:51 AM, "Bernd Vogelgesang" 
wrote:
>> >
>> > Arghh, sorry for the noise!
>> >
>> > When hovering over the data-driven input button not so hectically, I
discovered the explanation that it expects a 0 or 1.
>> > So
>> > case when
>> > 'mypath'|| @atlas_pagename ||'_1.jpeg' IS NULL
>> > THEN
>> > 0
>> > END
>> >
>> > did the trick!
>>
>> This is odd... A null picture expression should be rendered empty, not
as the red cross. The red cross is intended only as an obnoxious, obvious
indicator that a picture path was set but couldn't be found.
>>
>> The expression above would only result in 0 if @atlas_pagename is null.
>>
>> Nyall
>
>
> Well, yeah, I was too early to announce the solution. In fact this did
not render the missing image, but also not the one which is there :(
>
> case when
>
'/media/Daten/IVL_Projekte/2016024_Feldhamster_NEA/2_EINGANG_MA/Bernd/QGIS/Fotos/'||
@atlas_pagename ||'_1.jpeg' IS NULL
> THEN
> 1
> ELSE
> 0
> END
>
> This should do it. But now I am again where is started: When the image is
there, it is rendered, when not, the red cross is exported as well.

That's because that expression is just testing whether the concatenated
string itself is null, not whether the corresponding file actually exists.

My advice: make a small python custom function 'file_exists' which checks
for the existence of a file. Then change your picture path expression to
something like:

Case when file_exists( 'media/' ... Etc) then  'media/' ... Else null end

That should get you the result you are after.

Nyall

>
> :(
>
> Bernd
>
>> >
>> > Just amazing!!!
>> >
>> > Thanx
>> > Bernd
>> >
>> > Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :
>> >
>> >> Hi,
>> >> what about using the data-defined option near the "Exclude items from
export" in the items properties --> Rendering (with a case when expression)?
>> >>
http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode
>> >>
>> >> HTH,
>> >> Harrissou
>> >>
>> >> 2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang :
>> >>>
>> >>> Hi,
>> >>> I set up a neat atlas for displaying a row of 50 sample plots. On a
second page, I want to show 2 pictures taken of these plots automatically
with an expression including the path || @atlas_pagenumber || '_1.jpeg' or
'_2.jpeg' to display up to two photos named e.g. 1_1.jpeg, 1_2.jpeg.
>> >>>
>> >>> This works really great! The problem is, that for some plots, we do
not and have any picture or only one. In composer, these missing images are
marked with a big red cross.
>> >>> Unfortunately, these red crosses are also exported, which looks
quite shitty.
>> >>>
>> >>> Is there any clever way of forcing QGIS not to export these place
holders but just not to print anything at this place?
>> >>>
>> >>> The only (boring) idea I came up with till now, was to create empty
white images and name them accordingly to avoid the red crosses.
>> >>>
>> >>> Thanx
>> >>> Bernd
>> >>>
>> >>> --
>> >>> Bernd Vogelgesang
>> >>> Siedlerstraße 2
>> >>> 91083 Baiersdorf/Igelsdorf
>> >>> Tel: 09133-825374
>> >>> ___
>> >>> Qgis-user mailing list
>> >>> Qgis-user@lists.osgeo.org
>> >>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>> >>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>> >>
>> >>
>> >
>> >
>> >
>> > --
>> > Bernd Vogelgesang
>> > Siedlerstraße 2
>> > 91083 Baiersdorf/Igelsdorf
>> > Tel: 09133-825374
>> >
>> > ___
>> > Qgis-user mailing list
>> > Qgis-user@lists.osgeo.org
>> > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>> > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
___
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Bernd Vogelgesang]

Am 26.10.2016, 22:57 Uhr, schrieb Nyall Dawson :



On 27 Oct 2016 6:51 AM, "Bernd Vogelgesang"   
wrote:


Arghh, sorry for the noise!

When hovering over the data-driven input button not so hectically, I  
discovered the explanation that it expects a 0 or 1.

So
case when'mypath'|| @atlas_pagename ||'_1.jpeg' IS NULL
THEN
0
END

did the trick!


This is odd... A null picture expression should be rendered empty, not  
as the red cross. The red cross is intended only as an >obnoxious,  
obvious indicator that a picture path was set but couldn't be found.


The expression above would only result in 0 if @atlas_pagename is null.

Nyall


Well, yeah, I was too early to announce the solution. In fact this did not  
render the missing image, but also not the one which is there :(


case when
'/media/Daten/IVL_Projekte/2016024_Feldhamster_NEA/2_EINGANG_MA/Bernd/QGIS/Fotos/'||  
@atlas_pagename ||'_1.jpeg' IS NULL

THEN
1
ELSE
0
END

This should do it. But now I am again where is started: When the image is  
there, it is rendered, when not, the red cross is exported as well.


:(

Bernd






Just amazing!!!
Thanx
Bernd

Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :


Hi,
what about using the data-defined option near the "Exclude items from  
export" in the items properties --> Rendering (with a case >when  
expression)?

http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode

HTH,
Harrissou

2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang  
:


Hi,
I set up a neat atlas for displaying a row of 50 sample plots. On a  
second page, I want to show 2 pictures taken of these plots  
>automatically with an expression including the path ||  
@atlas_pagenumber || '_1.jpeg' or '_2.jpeg' to display up to two  
photos named >e.g. 1_1.jpeg, 1_2.jpeg.


This works really great! The problem is, that for some plots, we do  
not and have any picture or only one. In composer, these >missing  
images are marked with a big red cross.
Unfortunately, these red crosses are also exported, which looks quite  
shitty.


Is there any clever way of forcing QGIS not to export these place  
holders but just not to print anything at this place?


The only (boring) idea I came up with till now, was to create empty  
white images and name them accordingly to avoid the red >crosses.


Thanx
Bernd

--Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374
___
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--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374

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--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374___
Qgis-user mailing list
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Nyall Dawson]

On 27 Oct 2016 6:51 AM, "Bernd Vogelgesang" 
wrote:
>
> Arghh, sorry for the noise!
>
> When hovering over the data-driven input button not so hectically, I
discovered the explanation that it expects a 0 or 1.
> So
> case when
> 'mypath'|| @atlas_pagename ||'_1.jpeg' IS NULL
> THEN
> 0
> END
>
> did the trick!

This is odd... A null picture expression should be rendered empty, not as
the red cross. The red cross is intended only as an obnoxious, obvious
indicator that a picture path was set but couldn't be found.

The expression above would only result in 0 if @atlas_pagename is null.

Nyall

>
> Just amazing!!!
>
> Thanx
> Bernd
>
> Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :
>
>> Hi,
>> what about using the data-defined option near the "Exclude items from
export" in the items properties --> Rendering (with a case when expression)?
>>
http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode
>>
>> HTH,
>> Harrissou
>>
>> 2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang :
>>>
>>> Hi,
>>> I set up a neat atlas for displaying a row of 50 sample plots. On a
second page, I want to show 2 pictures taken of these plots automatically
with an expression including the path || @atlas_pagenumber || '_1.jpeg' or
'_2.jpeg' to display up to two photos named e.g. 1_1.jpeg, 1_2.jpeg.
>>>
>>> This works really great! The problem is, that for some plots, we do not
and have any picture or only one. In composer, these missing images are
marked with a big red cross.
>>> Unfortunately, these red crosses are also exported, which looks quite
shitty.
>>>
>>> Is there any clever way of forcing QGIS not to export these place
holders but just not to print anything at this place?
>>>
>>> The only (boring) idea I came up with till now, was to create empty
white images and name them accordingly to avoid the red crosses.
>>>
>>> Thanx
>>> Bernd
>>>
>>> --
>>> Bernd Vogelgesang
>>> Siedlerstraße 2
>>> 91083 Baiersdorf/Igelsdorf
>>> Tel: 09133-825374
>>> ___
>>> Qgis-user mailing list
>>> Qgis-user@lists.osgeo.org
>>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>>
>
>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Bernd Vogelgesang]

Arghh, sorry for the noise!

When hovering over the data-driven input button not so hectically, I  
discovered the explanation that it expects a 0 or 1.

So
case when
'mypath'|| @atlas_pagename ||'_1.jpeg' IS NULL
THEN
0
END

did the trick!

Just amazing!!!

Thanx
Bernd

Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :


Hi,
what about using the data-defined option near the "Exclude items from  
export" in the items properties --> Rendering (with a case when  
>expression)?

http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode

HTH,
Harrissou

2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang :

Hi,
I set up a neat atlas for displaying a row of 50 sample plots. On a  
second page, I want to show 2 pictures taken of these plots  
>>automatically with an expression including the path ||  
@atlas_pagenumber || '_1.jpeg' or '_2.jpeg' to display up to two photos  
>>named e.g. 1_1.jpeg, 1_2.jpeg.


This works really great! The problem is, that for some plots, we do not  
and have any picture or only one. In composer, these >>missing images  
are marked with a big red cross.
Unfortunately, these red crosses are also exported, which looks quite  
shitty.


Is there any clever way of forcing QGIS not to export these place  
holders but just not to print anything at this place?


The only (boring) idea I came up with till now, was to create empty  
white images and name them accordingly to avoid the red >>crosses.


Thanx
Bernd

--Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374
___
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--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374___
Qgis-user mailing list
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[DelazJ]

2016-10-26 22:36 GMT+02:00 Bernd Vogelgesang :

> Hi Harrissou,
> thanx for the hint. I already saw the checkbox, but had no idea what to do
> with it.
>
> My problem now is, that I have really no idea what to put in the "case
> when"
> Maybe something like
> '/mypath/'|| @atlas_pagename ||'_1.jpeg' IS NULL or so?
>
> I do not know what is expected to be returned that this option will
> trigger. There seems not to be a boolean type or so. The documentation does
> not tell what to do there.
>
> If you click the data-defined button, the description menu explains what
is expected; in this case a boolean
so, though not tested, I'd say
case when '/mypath/'|| @atlas_pagename ||'_1.jpeg' IS NULL then 1 else 0
end (or perhaps inverse 1 and 0)

Still confused, but there might be a solution...
>
> Bernd
>
> Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :
>
> Hi,
> what about using the data-defined option near the "Exclude items from
> export" in the items properties --> Rendering (with a case when expression)?
> http://docs.qgis.org/2.14/en/docs/user_manual/print_
> composer/composer_items/composer_items_options.html#rendering-mode
>
> HTH,
> Harrissou
>
> 2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang :
>
>> Hi,
>> I set up a neat atlas for displaying a row of 50 sample plots. On a
>> second page, I want to show 2 pictures taken of these plots automatically
>> with an expression including the path || @atlas_pagenumber || '_1.jpeg' or
>> '_2.jpeg' to display up to two photos named e.g. 1_1.jpeg, 1_2.jpeg.
>>
>> This works really great! The problem is, that for some plots, we do not
>> and have any picture or only one. In composer, these missing images are
>> marked with a big red cross.
>> Unfortunately, these red crosses are also exported, which looks quite
>> shitty.
>>
>> Is there any clever way of forcing QGIS not to export these place holders
>> but just not to print anything at this place?
>>
>> The only (boring) idea I came up with till now, was to create empty white
>> images and name them accordingly to avoid the red crosses.
>>
>> Thanx
>> Bernd
>>
>> --
>> Bernd Vogelgesang
>> Siedlerstraße 2
>> 91083 Baiersdorf/Igelsdorf
>> Tel: 09133-825374
>> ___
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
>
>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Bernd Vogelgesang]

Hi Harrissou,
thanx for the hint. I already saw the checkbox, but had no idea what to do  
with it.


My problem now is, that I have really no idea what to put in the "case  
when"

Maybe something like
'/mypath/'|| @atlas_pagename ||'_1.jpeg' IS NULL or so?

I do not know what is expected to be returned that this option will  
trigger. There seems not to be a boolean type or so. The documentation  
does not tell what to do there.


Still confused, but there might be a solution...

Bernd

Am 26.10.2016, 22:19 Uhr, schrieb DelazJ :


Hi,
what about using the data-defined option near the "Exclude items from  
export" in the items properties --> Rendering (with a case when  
>expression)?

http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode

HTH,
Harrissou

2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang :

Hi,
I set up a neat atlas for displaying a row of 50 sample plots. On a  
second page, I want to show 2 pictures taken of these plots  
>>automatically with an expression including the path ||  
@atlas_pagenumber || '_1.jpeg' or '_2.jpeg' to display up to two photos  
>>named e.g. 1_1.jpeg, 1_2.jpeg.


This works really great! The problem is, that for some plots, we do not  
and have any picture or only one. In composer, these >>missing images  
are marked with a big red cross.
Unfortunately, these red crosses are also exported, which looks quite  
shitty.


Is there any clever way of forcing QGIS not to export these place  
holders but just not to print anything at this place?


The only (boring) idea I came up with till now, was to create empty  
white images and name them accordingly to avoid the red >>crosses.


Thanx
Bernd

--Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374
___
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--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
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Re: [Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[DelazJ]

Hi,
what about using the data-defined option near the "Exclude items from
export" in the items properties --> Rendering (with a case when expression)?
http://docs.qgis.org/2.14/en/docs/user_manual/print_composer/composer_items/composer_items_options.html#rendering-mode

HTH,
Harrissou

2016-10-26 22:10 GMT+02:00 Bernd Vogelgesang :

> Hi,
> I set up a neat atlas for displaying a row of 50 sample plots. On a second
> page, I want to show 2 pictures taken of these plots automatically with an
> expression including the path || @atlas_pagenumber || '_1.jpeg' or
> '_2.jpeg' to display up to two photos named e.g. 1_1.jpeg, 1_2.jpeg.
>
> This works really great! The problem is, that for some plots, we do not
> and have any picture or only one. In composer, these missing images are
> marked with a big red cross.
> Unfortunately, these red crosses are also exported, which looks quite
> shitty.
>
> Is there any clever way of forcing QGIS not to export these place holders
> but just not to print anything at this place?
>
> The only (boring) idea I came up with till now, was to create empty white
> images and name them accordingly to avoid the red crosses.
>
> Thanx
> Bernd
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
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[Qgis-user] Composer Atlas: How get rid of the big red cross when there is no image?

[Bernd Vogelgesang]

Hi,
I set up a neat atlas for displaying a row of 50 sample plots. On a second  
page, I want to show 2 pictures taken of these plots automatically with an  
expression including the path || @atlas_pagenumber || '_1.jpeg' or  
'_2.jpeg' to display up to two photos named e.g. 1_1.jpeg, 1_2.jpeg.


This works really great! The problem is, that for some plots, we do not  
and have any picture or only one. In composer, these missing images are  
marked with a big red cross.
Unfortunately, these red crosses are also exported, which looks quite  
shitty.


Is there any clever way of forcing QGIS not to export these place holders  
but just not to print anything at this place?


The only (boring) idea I came up with till now, was to create empty white  
images and name them accordingly to avoid the red crosses.


Thanx
Bernd

--
Bernd Vogelgesang
Siedlerstraße 2
91083 Baiersdorf/Igelsdorf
Tel: 09133-825374
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