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Results tagged with c++
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user 28443
An object-oriented programming language
0
votes
Load a layer in qgis with c++
You haven't initialized the QGIS application. Try replacing
QgsApplication app(argc, argv, true);
with
QgsApplication app(argc, argv, true);
QgsApplication::initQgis();
The initQgis step is re …
- 27.9k
1
vote
Accepted
QGis Standalone App access to maptools defined in app directory
Anything in the "app" library is not exposed as public API - it generally just contains the non-reusable portions of GUI and GUI logic, and accordingly isn't a stable api and changes between releases. …
- 27.9k
7
votes
Improving QGIS source code efficiency?
There's no inefficiency here. They are only c++ pointers to the same layer instance -- it's not two instances in separate memory of the same map layer.
- 27.9k
4
votes
Accepted
QGIS CPP multi-platform plugin deployment
It's generally discouraged to write c++ QGIS plugins, for the following reasons:
They can't be distributed via the plugin library (only python plugins with no binary dependencies are accepted)
The c …
- 27.9k
0
votes
Setting up rulebased labelling programmatically in QGIS?
It's not possible yet - the relevant methods and classes aren't exposed to the python API. This will be addressed when 3.0 is released.
- 27.9k
2
votes
Accepted
Correct Qt version to build QGIS master
Anything >= 5.5 should work. But:
there's major bugs in qt 5.6, so avoid that one
QGIS 3D requires qt >= 5.9
I'd suggest avoiding the very latest qt release, as occasionally there's build issues wit …
- 27.9k
1
vote
Difficulties working with QGIS 3.4 API
You may be looking for https://qgis.org/api/api_break.html - this is the official documentation regarding API which changed between versions 2 and 3.
- 27.9k