All pointer based methods have been removed.
Now we have only:
void setGeometry( const QgsGeometry& geom )
and
QgsGeometry geometry() const
Benefits include avoiding a whole lot of tricky pointer lifetime
issues, potential memory leaks, and finally closing #777, which
has survived for over 9 years!...
Impacts on PyQGIS code:
- no more need for the messy
g = QgsGeometry( feature.geometry() )
workaround, just use g = feature.geometry() instead
- IMPORTANT: you can no longer test whether a feature has geometry
using `if f.geometry():`, since QgsFeature::geometry() will
*always* return an object. Instead, use
`if not f.geometry().isEmpty():`, or preferably the new method
`if not f.hasGeometry():`
Fix#777
Adds a new method to QgsGeometry for merging linestrings.
By passing a multilinestring, any connected lines will
be joined into single linestrings. Behind the scenes this
uses GEOS' line merge.
A corresponding expression function "line_merge" has also
been added.
Returns the closure of the combinatorial boundary of the
geometry (ie the topological boundary of the geometry).
For instance, a polygon geometry will have a boundary
consisting of the linestrings for each ring in the polygon.
Follows OGC / SQL/MM specs for boundary calculation
...and leave only:
QgsCoordinateTransform( const QgsCoordinateReferenceSystem& source,
const QgsCoordinateReferenceSystem& destination );
The other constructors were not used anyway in QGIS code,
had awkward/confusing API, and no unit tests.
And rename to QgsUnitTypes::RenderUnits. This enum is used in
much more contexts than just symbols, so QgsUnitTypes is a
better fit for it.
All methods which previously accepted QgsSymbolV2::OutputUnit
parameters or QgsSymbolV2::OutputUnitList parameters now take
QgsUnitTypes::RenderUnit or QgsUnitTypes::RenderUnitList
parameters respectively.
This change consolidates more unit handling and conversion into
QgsUnitTypes.
Additionally, UnknownUnit was renamed to UnknownDistanceUnit.
All methods which accepted QGis::UnitType parameters have been
updated to take QgsUnitTypes::DistanceUnit instead.
ALso remove the unit handling methods toLiteral, fromLiteral, tr,
fromTr, and fromUnitToUnitFactor from QGis. Their corresponding
counterparts in QgsUnitTypes should be used instead.
for initializing CRS objects.
This avoids the need for the separate QgsCRSCache class,
and means that the caching benefits are available without the
need for calling methods from QgsCrsCache.
This avoids the need for
QgsCoordinateReferenceSystem crs;
crs.createFromSrsId(...)
and instead can be replaced with
QgsCoordinateReferenceSystem crs = QgsCoordinateReferenceSystem::fromSrsId(...)
This adds the ability for users to set whether a user created
color scheme should show up in the color button drop-down menus.
It's accessed through the color picker dialog, on the lists tab.
Just add a new color scheme, then from the scheme menu tick the
new "show in buttons" option.
Handy if you have sets of common palettes and want them to be
instantly available through the color menu.
- rename methods with XML to Xml, CRS to Crs, WMS to Wms, ID to Id
- rename methods with SRS to Crs
- rename methods with abbreviations like "dest" to "destination"
- rename methods with abbreviations like "src" to "source"
Adds new methods overloads to QgsVectorLayer
getFeatures( expression )
getFeatures( ids )
getFeature( id )
These three methods to query features are by far the most used ones
and with this patch it is much easier to write and read code.
- isInitialised() has been renamed to isValid()
- theCRS parameter in setSourceCrs has been renamed to 'crs'
- setDestCRS() has been renamed to setDestinationCrs() for consistency
- destCRS() has been renamed to destinationCrs() for consistency
- theSource, theDest, theSourceSrsId, theDestSrsId, theSourceWkt,
theDestWkt, theSourceCRSType parameters in the QgsCoordinateTransform
constructors have been renamed to source, destination, sourceSrsId,
destinationSrsId, sourceWkt, destinationWkt, sourceCrsType respectively
- 'p' argument in transform() has been renamed to 'point', 'theRect' to
'rectangle', 'poly' to 'polygon'
- setDestCRSID has been removed, use setDestinationCrs() instead
- 'theNode', 'theDoc' parameters in readXML and writeXML have been
renamed to 'node' and 'document' respectively
- readXML() and writeXML() have been renamed to readXml() and writeXml()
for consistency
There was no code in core using the signals/slots associated with
QgsCoordinateTransform, and little reason to keep the class a
QObject. Making it not a QObject simplifies code and allows
QgsCoordinateTransform objects to be easily copied and passed
around without complication.
