Hi Patrick,
I think that you can not get the text from the label with the
item_variables function. The keys are limited to the predefinded
variables like:
_project_transform_context,item_id,item_uuid,layer_ids,layers,layout_dpi,layout_name,layout_numpages,layout_page,layout_pageheight,layout_pageoffsets,layout_pagewidth,miles_km,project_abstract,project_area_units,project_author,project_basename,project_creation_date,project_crs,project_crs_acronym,project_crs_definition,project_crs_description,project_crs_ellipsoid,project_crs_proj4,project_crs_wkt,project_distance_units,project_ellipsoid,project_filename,project_folder,project_home,project_identifier,project_keywords,project_last_saved,project_path,project_title,project_units,qgis_locale,qgis_os_name,qgis_platform,qgis_release_name,qgis_short_version,qgis_version,qgis_version_no,test,user_account_name,user_full_name
But you can use your own variable like filename and access it from anywhere:
Am 04.08.2021 um 13:27 schrieb Patrick Dunford:
I'm looking through the documentation and there is this example:
14.2.2.13. Layout Functions
<https://docs.qgis.org/3.10/en/docs/user_manual/working_with_vector/expression.html#id24>
This group contains functions to manipulate print layout items properties.
Function
Description
item_variables
Returns a map of variables from a layout item inside this print layout
*An example:*
*
Get the scale of the ‘Map 0’ in the current print layout:
map_get( item_variables('Map 0'), 'map_scale')
How do I find out how to get the text value of the layout item
"Filename" on the current print layout?
On 4/08/21 2:40 pm, Patrick Dunford wrote:
It is just an ordinary text field on a composer layout I think. I
don't use the atlas functionality.
On 4/08/21 10:19 am, Nyall Dawson wrote:
On Wed, 4 Aug 2021 at 06:17, Patrick Dunford
<enzedrailm...@gmail.com> wrote:
Good day
I am wishing to create a value in a field on a composer layout that
reads the value of another field on the layout and calculates a
value to
be displayed.
For example, I have an existing field called Filename on the layout
and
in a python script running in the main window console, I have this
code
that reads the value of the Filename field as follows:
layoutTitle = "Landscape 16:9 Header Nav Copyright Filename 2021"
project = QgsProject.instance()
projectLayoutManager = project.layoutManager()
layout = projectLayoutManager.layoutByName(layoutTitle)
fileNameLabel = layout.itemById('Filename')
fileNameText = fileNameLabel.text()
Obviously I am hoping that doing this from a field within the layout
that reads another field on the same layout will be much simpler than
the above. How exactly would I achieve that?
Just to clarify -- by "field" do you mean "a field value from the
atlas layer", or "a text label item"?
Nyall
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