Module Creation/sv

Adding new modules and workbenches in FreeCAD is very easy. We call module any extension of FreeCAD, while a workbench is a special GUI configuration that groups some toolbars and menus. Usually you create a new module which contains its own workbench.

Modules can be programmed in C++ or in python, or in a mixture of both, but the module init files must be in python. Setting up a new module with those init files is easy, and can be done either manually or with the FreeCAD build tool.

Using the FreeCAD Build tool
Att skapa en ny applikationsmodul i FreeCAD är ganska lätt. I FreeCAD's utvecklingsträd så finns FreeCAD Byggverktyg (fcbt) som gör de viktigaste sakerna för dig. Det är ett [Python] skript som är placerat i trunk/src/Tools/fcbt.py När din python tolk är korrekt installerad så kan du köra skriptet från en kommandorad med python fcbt.py Det kommer att visa följande meny: FreeCAD Build Tool Usage: fcbt [command parameter] possible commands are: - DistSrc        (DS)   Build a source Distr. of the current source tree - DistBin        (DB)   Build a binary Distr. of the current source tree - DistSetup      (DI)   Build a Setup Distr. of the current source tree - DistSetup      (DUI)  Build a User Setup Distr. of the current source tree - DistAll        (DA)   Run all three above modules - BuildDoc       (BD)   Create the documentation (source docs) - NextBuildNumber (NBN) Increase the Build Number of this Version - CreateModule   (CM)   Insert a new FreeCAD Module in the module directory For help on the modules type: fcbt ? Skriv CM vid kommandoprompten för att starta skapandet av en modul: Insert command: CM Nu efterfrågas det om ett namn på din nya modul. Låt oss till exempel kalla den för TestMod : Please enter a name for your application: TestMod Efter att du har tryckt enter så startar fcbt att kopiera alla nödvändiga filer för din modul till en ny mapp vid trunk/src/Mod/TestMod/ Sedan ändras alla filer med ditt nya modulnamn. Den enda saken du behöver göra nu är att lägga till de två nya projekten "appTestMod" och "appTestModGui" till din arbetsyta (på Windows) eller till dina makefile mål (unix). Det är allt!

Setting up a new module manually
You need two things to create a new module:


 * A new folder in the FreeCAD Mod folder (either in InstalledPath/FreeCAD/Mod or in UserPath/.FreeCAD/Mod). You can name it as you like.
 * Inside that folder, an InitGui.py file. That file will be executed automatically on FreeCAD start (for ex, put a print("hello world") inside)

Additionally, you can also put an Init.py file. The difference is, the InitGui.py file is loaded only when FreeCAD runs in GUI mode, the Init.py file is loaded always. But if we are going to make a workbench, we'll put it in InitGui.py, because workbenches are used only in GUI mode, of course.

Creating a new workbench
Inside the InitGui.py file, one of the first thing you will want to do is to define a workbench. Here is a minimal code that you can use: The workbench must have all these attributes defined:
 * The Icon attribute is an XPM image (Most software such as GIMP can convert an image into xpm format, which is a text file. You can then paste the contents here)
 * MenuText is the workbench name as it appears in the workbenches list
 * Tooltip appears when you hover on it with the mouse
 * Initialize is executed on FreeCAD load, and must create all menus and toolbars that the workbench will use. If you are going to make your module in C++, you can also define your menus and toolbars inside the C++ module, not in this InitGui.py file. The important is that they are created now, and not when the module is activated.
 * Activated is executed when the user switches to your workbench
 * Deactivated is executed when the user switches from yours to another workbench or leaves FreeCAD

Creating FreeCAD commands in Python
Usually you define all your tools (called Commands in FreeCAD) in another module, then import that module before creating the toolbars and menus. This is a minimal code that you can use to define a command:
 * The GetResources method must return a dictionnary with visual attributes of your tool. Accel defines a shortcut key but is not mandatory.
 * The IsActive method defines if the command is active or greyed out in menus and toolbars.
 * The Activated method is executed when the Command is called through a toolbar button or menu or even by script.

Creating FreeCAD Commands in C++
To Be Documented

Links

 * Some examples how power users have extended FreeCAD with various custom external workbenches are collected in External workbenches