Allows creating of callout lines (or bubble callouts) which
link the text to a map location. To create a callout, users
select the text item and then drag out the central x node
to the desired callout end point.
Callout styles can be modified through the layer styling panel.
Adds a new "Linked layer" setting to the render page for annotation
layers, which allows users to optionally set a linked visibility
layer for the annotation layer. If set, then the annotations will
only be drawn when the linked layer is visible in the map.
This is designed to mimic the similar linked layer option for
the older annotation framework, in order to close the feature
gap between old vs new annotations
Refs https://github.com/qgis/QGIS-Enhancement-Proposals/issues/269
This adds a new annotation item type for rendering paragraphs
of text inside a rectangle
Options are present for:
- Text format
- Horizontal and vertical alignment
- Margins
- Background and frame symbol
Can render SVG or raster images as items in an annotation layer.
Options are present for:
- Locking the picture's aspect ratio
- Drawing with a background symbol
- Drawing with a border symbol
- Linked or embedded pictures
the text annotation should handle map rotation
Previously, text annotations just ignore map rotation, which
matches how regular map labels are handled. But this is not
desirable for some point text annotations, where it can
be considered a bug that the item ignores the map rotation (eg
when a text annotation has been placed to align with a feature
on the map, such as a road)
There's no one "correct" behaviour here, so add a new
combo box widget in the annotation point text settings with
options for
"Ignore Map Rotation"
"Rotate With Map"
so that users can pick the desired behavior for their annotations
edit operation on an annotation item
This is used for the item to return a representative geometry
of what the item would look like if the operation were to be
applied. It's used to generate a rubber band showing a preview
of the modification during interactive editing operations on
an annotation item.
edit operations on annotation layers, with initial implementation
as QgsAnnotationItemEditOperationMoveNode
This class encapsulates edit operations which apply to annotation
layers/items
For now all nodes just directly represent vertices in the item,
but the intention here is that they can represent any form of handle
which can be used to manipulate an item (e.g. a bezier curve point,
some "smart shape" handle for resizing or rotating an item, etc)
renderer operations
This follow a similar pattern as how labeling results could be collected
after a map render job, but generalises the API so that it can be
used for storing details of rendered items of any type.
It's currently used for storing details of rendered annotation items,
so that map tools can retrieve details of annotation items visible
in the canvas in an optimised way.
Because some annotation items have scale dependent bounding boxes,
we can only index items which have a fixed bounding box. Other
item bounds need to be dynamically determined based on a specific
render context. So rework the annotation layer index handling
to only index appropriate items and store other items in a non-indexed
item set.
This isn't ideal, because it means we need to clone ALL non-indexed
items upfront whenever we render an annotation layer (it's too expensive
to calculate their actual bounding box and selectively clone them,
as it's a process which blocks the main thread).
Hopefully we can think of an alternative approach to this down
the line so that we DO have some form of spatial index for scale
dependent items, unlocking better performance for annotation layers
with 10,000s of items. But we'll ignore that situation for now ;)
to annotation layers to reflect that while these are editable
users are not able to toggle edits on them (they are ALWAYS
editable!)
Note that we can't use the existing QgsMapLayer::LayerFlag enum here,
as that has a different meaning (flags which are set by users
at runtime)
