I'm not sure which of QT 5.9.0 or gcc 5.5.0 is not happy, but with both
of them, I get:
```
/opt/qt59/include/QtCore/qflags.h: In instantiation of ‘QFlags<T>& QFlags<T>::setFlag(Enum, bool) [with Enum = QgsDxfExport::DxfPolylineFlag]’:
/home/even/qgis/QGIS/src/core/dxf/qgsdxfexport.cpp:1102:68: required from here
/opt/qt59/include/QtCore/qflags.h:153:46: error: no match for ‘operator~’ (operand type is ‘QgsDxfExport::DxfPolylineFlag’)
return on ? (*this |= f) : (*this &= ~f);
```
`reloadData()` implementations are set to private on `reloadProviderData()`
All calls of `forceReload()` or `reloadData()` target `QgsDataProvider::reloadData()` what calls the implemented `reloadProviderData()` of the provider and `dataChanged()` signal is called allways. That this signal is called changes the behavior of the `dataReload()` calls of all providers.
of labels, min size for labels) to a new class QgsLabelThinningSettings
This new class is designed to contain settings related to how the label
engine removes candidate label positions and reduces the number of
displayed labels.
So that these files are all grouped together, making it easier to locate
all the components of the labeling engine and hopefully making things
easier to navigate
* [feature] support datasets with data defined on faces in mesh calculator, fix#30219, fix#30170
added "driver" and "group name" to the calculator interface.
MDAL now supports 3 drivers for storing results, so user must be able to choose appropriate driver and dataset group name (some drivers store multiple groups to 1 file)
be shown to users when using that provider
This can be used to return a translated warning message which should be
shown to users of this provider. It's intended for use in cases such as
a provider which relies on a 3rd-party backend, where the version of the
backend software is not officially supported, or for alerting users to
providers in a "beta" or "untrustworthy" state.
- For project : check visible state for embedded layers inside an unchecked group, instead of putting all layers in embedded-invisible-layers
- For theme : Add an 'checked-group-node' to save group visible state independently to layers in it.
Fixes#33097
Stacked 3D meshes store values on the volumes that are regularly stacked over base 2d mesh. User can select various 3d to 2d averaging/interpolation method to convert values on volumes (3d) to values on faces (2d) that can be shown in mesh layer. This is achieved by new tab in the mesh layer properties dialog.
* [FEATURE] Static particle traces for rendering mesh vector dataset
This PR permits to display directly in QGIS static particle traces for vector datasets in mesh layer without any plugin.
The user can choose in the mesh layer properties window :
- the color
- the size of the traces (line width)
- the count of particles
- the maximum length of the particle's tail
* [FEATURE] API for rendering frames for mesh vector dataset animation (particles)
Adds a renderer to generate frames that represent particle traces in a vector field of a mesh layer. The renderer cannot be chosen in the current GUI, however crayfish plugin can use API to generate avi/gif files with nice animations representing the movement of (random) particles in the mesh layer vector field.
placement rules should be followed when solving the pal labeling engine
solution.
For new projects it defaults to version 2, but when loading an older project
version 1 is used.
This allows changes to be made to the label placement problem solving without
affecting the placement of labels in existing projects.
* [FEATURE] Mesh streamlines
fix#29534
The vector field data set in a mesh layer can currently be only rendered with arrows. This PR adds a new feature to render vector field in mesh layers with streamlines.
The streamlines are seeded from start points. The seeding points can start from the vertices of the mesh, from a used grid or randomly. Streamlines could be coloured or width can be selected.
