Emulate the node interaction behaviour from the hinting plugin

Scripting
1

Hello, I would like to emulate the behaviour that the hinting plugin uses: Nodes are selectable, but not editable, and this is reflected in the UI. Is there an easy way to achieve this in a reporter plugin? Thanks!

2

not with a reporter. You need a tool for this.

3

Sorry, I am not working with a reporter, I have it in a .glyphsTool. How would I do this in a tool?

4

Overwrite the drawHandle:… method like this:

- (void)drawHandle:(GSPath *)path atIndex:(NSUInteger)idx isSelected:(BOOL)selected atPoint:(NSPoint)layerOrigin simple:(BOOL)simple {
	GSNode *node = [path nodeAtIndex:idx];
	[self drawKnob:node.position type:node.type selected:selected atPoint:layerOrigin];
}
5

Thanks. Is this possible in Python?

6

Just replace : with _ :wink:

7

Hi again, sorry to come back to this. I still don’t understand. In my SelectTool code, I have:

@obj.python_method
def drawHandle_(self, path, index, isSelected, layerOrigin, simple=False):
    print("Hello world")

When I activate my select tool, nothing happens, though. How do I do this correctly? Do you have a sample plugin I can look at with similar code? Thanks!

8

you need the full method name. In objectiveC it is interlaced with the arguments. There are many : to replace:

def drawHandle_atIndex_isSelected_atPoint_simple_(path, idx, selected, layerOrigin, simple):
9

I had tried that, but didn’t get it to work.

When I use the @objc.python_method decorator, nothing happens. The print statement has no effect.

When I don’t use the decorator, I get:

objc.BadPrototypeError: 
'drawHandle:atIndex:isSelected:atPoint:simple:' expects 5 arguments, 
<function MyPlugin.drawHandle_atIndex_isSelected_atPoint_simple_ 
at 0x156377880> has between 3 and 4 positional arguments

For reference, this is my code:

def drawHandle_atIndex_isSelected_atPoint_simple_(path, index, selected, layerOrigin, simple=False):
    print("Hello World")
10

Ah! I need to have self as the first argument as well. Now it works. Thanks a lot!

Another question: How do I make the nodes unmovable, like in the hinting plugin?

11

you can try to overwrite:

def moveSelectionWithPoint_withModifier_(self, offset: NSPoint, modifierFlag: int):

and only move whatever you need.

12

Thank you very much!

13

I got this to work for oncurve nodes, what is the function name for offcurves? I can’t find the correct function in GlyphsPathPlugin.h. I guess knobs are the extra nodes, right?

14

What do you mean by that? There is no special move method for on and offcurve nodes. You move whatever you consider as selected (usually what is in Layer.selection).

15

Sorry, I meant the drawing. This only does oncurve nodes:

drawHandle_atIndex_isSelected_atPoint_simple_()