Am 26.10.2016, 22:57 Uhr, schrieb Nyall Dawson <nyall.daw...@gmail.com>:
On 27 Oct 2016 6:51 AM, "Bernd Vogelgesang" <bernd.vogelges...@gmx.de>
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 <del...@gmail.com>:
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
<bernd.vogelges...@gmx.de>:
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
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