[FEATURE] [mesh] Load reference time from MDAL when available
Also adds combo box to let the user set the provider time unit. This is particularly useful when MDAL incorrectly recognised the time units in the raw dat format (for example format does nof follow spec and it is not possible to determine if time interval is in hours or days)
fix#32186fix#33399fix#31933
by QgsCoordinateTransformContext.calculateCoordinateOperation corresponds
to the reverse of what's actually required.
Gross API, but it's the best we can do until proj has a method to
invert a coordinate operation so that we can return the proper
inverse operation proj string from calculateCoordinateOperation
(without resorting to fragile proj string parsing/mangling)
from the proj string via the transform context
This isn't possible -- only proj coordinate operations constructed
from a src/dest CRS pair can be normalized, not those constructed
from a proj string.
It was redundant in any case, since we always normalize the available
operations before giving users a choice of them.
So just add some big bold warnings to the dox in case anyone is
manually manipulating and adding custom operations, that these
also MUST be pre-normalized
Refs #33121, conversation in https://github.com/OSGeo/PROJ/issues/1794
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);
```
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
