layout designer interface API
This commit adds more methods to the public, stable API for the layout
designer dialog, allowing plugins and scripts greater flexibility
in extending and hooking into the layout designer.
New API includes:
- access to the main menus shown in the dialog, allowing custom actions
to be added to the dialog
- access to the dialog's toolbars
- methods for adding (and removing) additional dock widgets to the designer
- the method used to show/hide rulers in the designer
Fixes an unreported bug where it was possible to select a layer tree group
and remove even when it contained required layers.
When removing layers/groups, the following checks will now also recursively
test layers and not just directly selected layers:
- test for layers with unsaved changes
- test for layers with active tasks running in background
data defined buttons for model child algorithms
The context was not previously exposed, so users would not have
been aware that they can utilise all the variables and functions
available to parameters within child algorithms.
for pre-calculated expressions
Correctly exposes ALL the variables and functions available for use
in pre-calculated expressions so that users actually know they can
use these in their models!
The context contains settings which reflect the context ini
which a Processing parameter widget is shown, e.g., the
parent model algorithm, a linked map canvas, and other relevant
information which allows the widget to fine-tune its behavior.
Until now the identification from 3D map view used tolerance based
on the current view of the main 2D map canvas - that was giving often
unexpected results if the 2D map canvas had significantly different
zoom level from the 3D map view.
With implementation in app. This allows GUI library classes to
re-use standard dialogs which are created in app. The initial
use-case is to allow the GUI library symbol list widget to
focus/open an existing Style Manager dialog (created in app),
instead of opening a new modal style manager dialog.
Side benefit - moves some code out of the monolithic qgisapp.cpp
file.
