This new symbol layer type allows placing text labels at regular
intervals along a line (or at positions corresponding to
existing vertices). Positions can be calculated using
Cartesian distances, or interpolated from z/m values.
Functionality includes:
- Labels can be placed using fixed cartesian 2d distances,
at regular linearly interpolated spacing calculated using
the Z or M values in geometries, or at existing vertices
- Labels can show either the running total distance, or
the linearly interpolated Z/M value
- Uses text rendered to draw labels, so the full range
of functionality is available for the labels (including
buffers, shadows, etc)
- Uses the QGIS numeric format classes to format numbers
as strings, so users have full range of customisation
options for eg decimal places
- An optional "skip multiples of" setting. If set, then
labels which are a multiple of this value will be skipped
over. This allows construction of complex referencing labels,
eg where a symbol has two linear referencing symbol layers,
one set to label every 100m in a small font, skipping multiples
of 1000, and a second set to label every 1000m in a big
bold font
- Labels are rendered using an angle calculated by averaging
the linestring, so sharp tiny jaggies don't result in
unslightly label rotation
- Optionally, markers can be placed at referenced points
in the line string, using a full QGIS marker symbol (this allows
eg showing a cross-hatch at the labeled point, for a "ruler"
style line)
- Data defined control over the placement intervals, skip
multiples setting, marker visibility and average angle
calculation length
Notes:
- When using the distance-based placement or labels, the
distances are calculated using 2D only, Cartesian calculations
based on the original layer CRS. This could potentially be
extended in future to expose options for 3D Cartesian distances,
or ellipsoidal distance calculations.
Sponsored by the Swiss QGIS User Group
This adds a new line symbol type which renders lines using a
fill symbol. The interior of the line is drawn using any standard
QGIS fill symbol, allowing for lines filled with gradients, line
hatches, etc.
Sponsored by North Road, thanks to SLYR
categorized class symbol editors, and QGIS is closed or a new project
opened
The symbol ownership of QgsSymbolSelectorWidget is very messy, and
we can't fix till 4.0. Workaround this by introducing a temporary
API to transfer symbol ownership to the widget.
Users can now indicate that a symbol should be treated as a animated
symbol, through the new "Animation Settings" option in the symbol
widget's Advanced menu.
This settings panel allows users to enable animation for the symbol
and set a specific frame rate at which the symbol should be redrawn.
When enabled, the @symbol_frame variable can be used in any
symbol data defined property in order to animate that property.
For instance, setting the symbol's rotation to the data defined
expression
@symbol_frame % 360
will cause the symbol to rotate over time. (with rotation speed
dictated by the symbol's refresh rate)
This new marker symbol type allows points to be rendered using
an animated marker, sourced from an animated gif, webp or mng
animation.
Options are present for marker file, size, angle and frame rate.
There are two ways in which animated symbols are handled:
1. If the map itself is considered an animation, then the frame
rendered for the animated marker is based on the map animation
frame and frame rate. This is the case when the temporal
controller is set to the Animation mode. In this case the
animated markers will follow the temporal controller animation,
e.g. pausing when the animation is paused, advancing frames
with the animation, etc. The map will also be redrawn using
the frame rate set for the temporal animation.
This mode also applies when exporting an animation from the
temporal controller.
It's also the mode used when a plugin specifically sets the
frame rate and current frame QgsMapSettings properties, so
e.g. @timlinux's QGIS Animation Workbench plugin will dictate
the marker animation frame to render.
2. If the map is NOT considered an animation (i.e. it's just
a plain old normal QGIS project), then the frame to render
will be based on the current timestamp alone.
Markers will be animated when their corresponding layer is set
to a temporal mode, and a temporal animation is playing.
This adds a new "Lineburst" symbol layer type, which renders
a gradient along the WIDTH of a line (as opposed to the interpolated
line renderer, which renders a gradient along the LENGTH of
a line). It's like the shapeburst fill symbol type, but for lines!
Sponsored by North Road, thanks to SLYR
This new symbol layer type renders a raster image following
a line feature's shape.
Options are present for:
- picture path (including data defined path)
- line width
- opacity
- line join/cap styles
Sponsored by North Road, thanks to SLYR
which are subrenderers for other renderers
Symbol layers have no effect in this situation (e.g. when a categorized
renderer is used as a subrenderer for point displacement renderer), so
don't show the option in the GUI
Instead of directly changing the renderer in place in the symbol levels
widget, we delegate responsibility for handling the changes to symbol
levels to the parent QgsRendererWidget subclass. This allows us to
implement different logic in the various subclasses which correctly
handle how that particular widget subclass should update any internal
symbol references and ultimately update the renderer.
Fixes instability and crashes after editing symbol levels.
Fixes#42671
- Add enums to qgis.h instead of qgscoreenums, so that they belong to
a Qgis namespace
- Split up the various symbol headers into multiple files so that we
can fine-tune their inclusion and forward declare more readily, speeding
up recompilation
- Move QgsSymbol enums to qgis
