On 27 Oct 2016 6:51 AM, "Bernd Vogelgesang" <[email protected]> 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 <[email protected]>: > >> 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 <[email protected]>: >>> >>> 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 >>> [email protected] >>> 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 > [email protected] > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
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