Dashboard concept

[timlinux]

GeoPackage if you want to try:

CasteloBranco.zip

[timlinux]

CasteloBranco.gpkg.zip

Version 2 with nicer implementation

[pigreco]

create a virtual field (test) on the highways layer and populate it with is_selected ()

then use the following expression:

round(
aggregate( 
'highway',
'sum', 
round( length( transform( $geometry, 'EPSG:4326', 'EPSG:32629' ) ) / 1000 ),
filter:="test"='true'), 
1 )

[pigreco]

improved solution, use this expression:

if( num_selected('highway') > 0 ,round(
aggregate( 
'highway',
'sum', 
round( length( transform( $geometry, 'EPSG:4326', 'EPSG:32629' ) ) / 1000 ),
filter:="test"='true'), 
1 ),0)

CasteloBranco.gpkg.zip

[PedroVenancio]

Joining all ideas!

if( num_selected('highway') > 0, 
  round( 
    aggregate( 
      'highway', 
      'sum', 
      ( (length( transform( $geometry, 'EPSG:4326', 'EPSG:3857' ) ) / 1000) ), 
      filter:=is_selected('highway', $currentfeature ) 
    )
  , 1)
, 0)

[PedroVenancio]

CasteloBranco.zip

[timlinux]

CasteloBranco.gpkg.zip

[mauriciomarquezgoa]

Muchas gracias!!! Espectacular!

[pigreco]

To have the dashboard in the mouse pointer:
use the @canvas_cursor_point variable in the geometry_generator field:

CasteloBranco.zip

[narceliodesa]

Very interesting, I think they could develop a new Decoration module called Dashboard. Where we could have the styling options linked to each panel. This frees us from the need to create a point file to assemble the dashboard graph.

Today in decorations the closest thing to that is the Title Label

[narceliodesa]

The bar above was made using the decorations.
It is as responsive as the points, but further customization is not possible.

[timlinux]

Here is an update that uses a better positioning schema and increases the number of elements to cover a secondary layer for building.

CasteloBranco.gpkg.zip

[timlinux]

This update adds a new font column to the dashboard table and adds column icons. You need to first install the UN-OCHA glyph font icons for it to work. These are a free font available here: https://unhcr.github.io/Humanitarian-Font/

Latest GeoPackage containing all the logic for the above image is available here:

CasteloBranco.gpkg.zip

[timlinux]

Another update using @nyalldawson 's tip to use layer dependencies to automatically update the dashboard labels

CasteloBranco.zip

[timlinux]

Here is the GeoPackage we created while recording this YouTube video walkthrough:

https://youtu.be/lJTV90SvRAM

QGISDashboardWalkthrough-Badajoz.zip

[nazuk27]

Is it possible to publish these dashboards online using qgis2web plugin or any other web service with all the features (i.e. automatic dashboard update features) available online?

[beerockxs]

I've been trying to get something like this to work for my project. The problem is that the project CRS is not 4326, I need to use a projected CRS. The coordinates returned by point_n( @map_extent, 4 ) are those of the top left corner of the visible extent, in my projected CRS, but the label does not appear. Changing the project CRS to 4326 makes them appear, but shouldn't they also work in a projected CRS?

[beerockxs]

For anyone else having this issues: Projected CRSs work fine, what you need to make sure is that the layer your creating the labels on has the same CRS as your project CRS, then this works. This QGIS issue seems related: qgis#26660