Difference between revisions of "Using QtCreator for GRASS C development"

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(First steps)
(Debuging)
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  lib/raster
 
  lib/raster
 
  dist.x86_64-unknown-linux-gnu/include
 
  dist.x86_64-unknown-linux-gnu/include
 +
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== Debuging ==
 +
You can run QtCreator from GRASS command line:
 +
/opt/QtSDK/QtCreator/bin/qtcreator 2> /dev/null &
  
 
== References ==
 
== References ==

Revision as of 08:49, 12 June 2012

QtCreator can be used for GRASS development in C by using QtCreator's Generic project [1].

First steps

Download, configure and compile GRASS as usually [2].

In QtCreator go to

File -> New File or Project -> Other Project -> Import Existing Project

and fill Project name. Choose something which allows you to recognize these files easily, e.g. not just grass. Separate projects are usually created for separate modules, group of modules or group of functions (part of a library). Location is directory where your GRASS sources are. Project files will be created in the same directory (it can not be changed).

Managing files

After pressing Next, QtCreator will scan this directory for all possible source files. Now you should choose which directories and files you want to include in project. It is highly recommended to uncheck every directory which you don't need. This applies especially to modules because modules' local header files can contain declarations which can confuse QtCreator's source completion. You will probably need only include and lib directories and if you are working on a module, you will need also your module directory. However, there is an issue with include directories. Include directory is at different places in source codes and in GRASS distribution directory. You have to help QtCreator to find header files by adding dist include directory to QtCreator project. This directory is here:

dist.(...)/include/grass

Now it is possible that you will experience problems with changing header files. It is always caused by editing file in dist directory instead of original source file because QtCreator's source browsing functions now bring you to wrong files. So if you are editing header file be sure that this file is in source code directory.

You can also apply filters to exclude particular file patterns, e.g.:

*.tcl; *.po; *.sh; *.m

On the last wizard page you have to set Add to version control to None. (Warning: If you forgot this step, QtCreator project files will be added to GRASS SVN.)

Once project is created you can add new files through Edit files option in project context menu in project tree. If you open this dialog and you press OK button, all files in marked directories will be added, so this is the way how to add new files from SVN.


Building

In order to compile GRASS it is necessary to change compilation settings.

Projects -> your_project_name -> Build Settings -> Build Steps

In Details uncheck all in Targets field. If you have more than one core, you may want to specify number of cores used by make by setting Make arguments field to -j n where n is number of cores you want to use. You can also change Build directory to run make only for necessary directories.

Since QtCreator can do indentation pretty well, it is easy to forget run indentation script, so do not forget to run it.


Samples

File project_name.files:

dist.x86_64-unknown-linux-gnu/include/grass/defs/arraystats.h
...
dist.x86_64-unknown-linux-gnu/include/grass/waterglobs.h
lib/raster/align_window.c
...
lib/raster/zero_cell.c
raster/r.mymodule/main.c

File project_name.includes:

include
include/defs
include/iostream
include/vect
lib/raster
dist.x86_64-unknown-linux-gnu/include

Debuging

You can run QtCreator from GRASS command line:

/opt/QtSDK/QtCreator/bin/qtcreator 2> /dev/null &

References

  1. Qt Reference Documentation: QtCreator, Setting Up a Generic Project, http://doc.qt.nokia.com/qtcreator/creator-project-generic.html
  2. Compile and Install GRASS