HOWTO: Register a python plugin inside pcbnew Tools menu

Hi all,

A new feature is now available for testing in KiCad daily build (PPA Ubuntu).
This feature allow you to create a menuentry on pcbnew at this place:

This new menu entry will call a python action/plugin.

To use it:

Compilation option

Be sure to use KiCad with KICAD_SCRIPTING_ACTION_MENU option activated (this is the case for PPA Ubuntu since yesterday).

Install the plugin

The following script is an example:

import pcbnew
import re
import datetime


class text_by_date( pcbnew.ActionPlugin ):
    def defaults( self ):
        self.name = "Add date on PCB"
        self.category = "Modify PCB"
        self.description = "Automaticaly add date on an existing PCB"

    def Run( self ):
        pcb = pcbnew.GetBoard()
        for draw in pcb.m_Drawings:
            if draw.GetClass() == 'PTEXT':
                txt = re.sub( "\$date\$ [0-9]{4}-[0-9]{2}-[0-9]{2}",
                                 "$date$", draw.GetText() )
                if txt == "$date$":
                    draw.SetText( "$date$ %s"%datetime.date.today() )


text_by_date().register()

This example script is took from sources:
kicad/demos/python_scripts_examples/action_menu_text_by_date.py

If package kicad-demo is installed, a copy is present at
/usr/share/kicad/demos/python_scripts_examples/action_menu_text_by_date.py

Copy (or create) this file at the right places to install it:

  • Single user installation (home directory based): ~/.kicad_plugins/
  • System wide: /usr/share/kicad/scripting/plugins/

After this, you can refresh plugin list (or restart kicad). A new menu entry is available:

Use the plugin

This (small) example plugin try to find any text field on the board file and if the text is ā€œ$date$ā€, it automaticaly change it by ā€œ$date$ā€ + the current date.
Example:

Before:

After:

Of course this example is really trivial. Anyway you can imaginate a large number of things with the python interface.

Keep in mind that python interface is not completly stable and your scripts needs to be written with care !

In KiCad demo there are 3 example provided:

  • action_menu_text_by_date.py: The example above
  • action_menu_add_automatic_border.py: An example to automaticaly add or update border/pcb edges
  • action_plugin_test_undoredo.py: 4 examples to tests undo/redo features.
10 Likes

This is awesome! Thank you very much. :slight_smile:

Is this for python plugins only or can we add tools made with the tool framework aswell?

Itā€™s only for python since itā€™s loading python scripts only.

Hi @jsreynaud
very nice, configurable and useful tool!
it was since my first release of kicad StepUp I was looking forward for a simple button to execute a script! :smiley:
Do you think it would be possible to also add an icon (svg or png) beside the name?
self.name = "Add date on PCB" self.icon ="my nice icon here.svg"
Maurice

Hi @maui

Yes, this is a feature I want to add in the futureā€¦
For the moment this feature is there for testing. Iā€™m expecting more feedback (bugs, errorsā€¦) before adding new features.

Ok thenā€¦
Iā€™m adapting my annular.py script to check annular rings of the displayed pcb board as a plugin and it works, but because the result of checking is printed, all messages are missedā€¦ is there a way to print or see the messages when executing the action script?

Yes, If you open kicad from a shell, you should be able to see your message on this shell directly.

hummm ā€¦
I forgot to tell you Iā€™m in windows ā€¦ and there nothing can be seen when running pcbnew from console

Ok so you can for example use some wx message box:

import wx
ā€¦
wx.MessageDialog(None,ā€œMy messageā€)

2 Likes

thx,

I had to write:

wx.LogMessage(ā€œMy messageā€)

to see the window
but this is fine for me :wink:

2 Likes

Would it be possible to execute scripts on specific events? Like on import of netlist.
I would like to make the revision on the silkscreen update from the revision in the netlist/schematic

This feature is also planned. Not yet available.

2 Likes

Hi again,
I noticed that when a script is executed, the board get touched and Save button become enabledā€¦
The same script if launched in python scripting console doesnā€™t do the sameā€¦
Is that something expected?
Here a simple example that triggers Save Buttonā€¦

import wx
import pcbnew
from pcbnew import *

class minimal_test( pcbnew.ActionPlugin ):

def defaults( self ):
    """
    Method defaults must be redefined
    self.name should be the menu label to use
    self.category should be the category (not yet used)
    self.description should be a comprehensive description
      of the plugin
    """
    self.name = "minimal test"
    self.category = "Checking PCB"
    self.description = "minimal test"
def Run( self ):
    
        wx.LogMessage("test")

minimal_test().register()

PS
Do you know why this nice tool is not available as default in nightly builds?
I use to build my own copy of kicad, but I discovered that in windows nightly it is not enabled ā€¦

Maurice

@jsreynaud
here a first Action Plugin Script converted from python console to AP :slight_smile:


action_menu_annular_check.py

3 Likes

Hi,

KiCad is unable to detect what your script is trying to do. So it assume that the script is modify the board.
An history in the undo/redo list is added and the board is marked as changed.
Event if you script doesnā€™t modify anything ā€¦

About nightly build Iā€™ll ask to @nickoe.

JS

2 Likes

yes, I noticed in the the cpp code

would be nice to have a return code from the python script (i.e. default = 1 #ā€˜board modifiedā€™) that the script can assign to 0 (board unmodified) so the board can be marked as changed only if the script is doing something that really change it?

that will allow a large amount of users to have this useful option enabled and will give developers a useful feedback ā€¦
Very little amount of users are building kicad from sourceā€¦
In fact this Action Plugin does not add any risk to those already present with the python console, but it is giving a more user friendly way to use python inside Kicad
Looking forward to see it in Nightly :wink:

3 Likes

I look forward too. I am on a mac :slight_smile:

1 Like

I had also ask to @adamwolf for that point.

1 Like

I think I can automatically detect if there are some modifications or not. Iā€™ll try this autodetection on a future patch.

1 Like

it seems that now the Action Plugin is delivered with the Nigtlies :smiley:

Application: kicad
Version: (2017-04-13 revision c4ea54227)-makepkg, release build
Libraries: wxWidgets 3.0.2
libcurl/7.52.1 OpenSSL/1.0.2k zlib/1.2.11 libssh2/1.8.0 nghttp2/1.19.0 librtmp/2.3
Platform: Windows 8 (build 9200), 64-bit edition, 64 bit, Little endian, wxMSW

  • Build Info -
    wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8)
    Boost: 1.60.0
    Curl: 7.52.1
    KiCad - Compiler: GCC 6.3.0 with C++ ABI 1010
    Settings: USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON

From now on, having a larger testing audience is much easier :wink: