Additional functionality when selecting brush tool

[Wintermute]

Hello everyone,

I’d like to set up my Krita environment so pressing ‘b’ for the brush tool always disables the erase mode and turns off Snap to Assistants. I did start down the path of creating a Python script for this, but I got lost in the API and I’d really appreciate any help. Thanks so much.

[Michelist]

Hello @Wintermute and welcome to the forum!

I moved your topic into an area where people with the needed knowledge are around, assuming it is in your interest.

Michelist

[Aqao]

You can combine actions to achieve it.

from krita import *

app = Krita.instance()
app.action("KritaShape/KisToolBrush").trigger()
erase_action = app.action("erase_action")
if erase_action.isChecked:
    erase_action.trigger()
toggle_assistant = app.action("toggle_assistant")
if toggle_assistant.isChecked():
    toggle_assistant.trigger()

For developing scripts this plug-in may help you.

Python Plugin Developer Tools

Introducing Python Plugin developer Tools! The goal of these tools is to make it easier for people to develop python plugins. Current features include: Selector/Sampler - for selecting with the mouse PyQt5 objects. Hold the shift key(or optionally ctrl/alt/meta key) and move the mouse as you wish, when you find the item you want, let go of the shift and it will show up in inspector. Inspector - Lets you browse/search the PyQt5 tree and also view all the properties (including inher…

[Wintermute]

Thank you for the help!

I added parenthesis after erase_action.isChecked: and that part works great.

However, the toggle_assistant isChecked() only seems to work the first time the script is run. Depending on which lines I change, it will work again (once). It’s hard for me to figure out what’s going on – maybe the toggle_assistant action is cached or accessing an older version in memory? The eraser action works every time like a charm.

[Aqao]

@Wintermute

toggle_assistant isChecked()

My second mistake. Action “toggle_assistant” is not checkable.
You can also iterate over QObject to get its check state.

toggle_assistant = app.action("toggle_assistant")
try:
    qdock = next(
        (w for w in Krita.instance().dockers() if w.objectName() == "sharedtooldocker"),
        None,
    )
    pobj = qdock.findChild(QWidget, "KritaShape/KisToolBrushoption widget")
    checkbox = pobj.children()[21]
    if checkbox.isChecked():
        toggle_assistant.trigger()
except:
    pass

This requires ensuring that current tool is brush tool, otherwise will not found widget we need.

This method is not very reliable and will fail after Krita GUI updated. This is done using “Inspector” in Plugin Developer Tools. You can improve it by using a non-index query.