Custom Additional Menu Grasshopper Component

Grasshopper Developer
1

Hi,

I have a problem with custom additional menu option in the component.
The problem is this: I have boolean option, that I untick in the component. But once I copy the component the boolean state returns back do its default position, default position happens also if I reopen grasshopper file.

The code I have is this:

protected override void AppendAdditionalComponentMenuItems(ToolStripDropDown menu) {
    base.AppendAdditionalComponentMenuItems(menu);

    var fooToggle = Menu_AppendItem(menu, "Min Triangulation", FooHandler, true, this.foo);
    fooToggle.ToolTipText = "Triangulation";
}

protected void FooHandler(object sender, EventArgs e) {
    this.foo = !this.foo;
    this.ExpireSolution(true);
}

And to explain the issue visually:

Question
Question.png1248×816 61 KB

2

Saw this recently. Is about custom message but maybe helps:

https://www.grasshopper3d.com/m/discussion?id=2985220%3ATopic%3A1204259

1 Like
3

Tim is correct - for a component setting to persist through save/ reopen and copy/paste you need to manage that setting in overrides for the Read and Write methods. The link Tim posted should point you in the right direction.

4

Thanks it does solve the problem. I literally copy paste the code add changed the names:

    bool foo = true;


    public override bool Write(GH_IWriter writer) {
        writer.SetBoolean("Min Triangulation", this.foo);
        return base.Write(writer);
    }

    public override bool Read(GH_IReader reader) {
        this.foo = false;
        reader.TryGetBoolean("Min Triangulation", ref this.foo);
        return base.Read(reader);
    }

    protected override void AppendAdditionalComponentMenuItems(ToolStripDropDown menu) {
        base.AppendAdditionalComponentMenuItems(menu);

        var fooToggle = Menu_AppendItem(menu, "Min Triangulation", FooHandler, true, this.foo);
        fooToggle.ToolTipText = "Triangulation";
    }

    protected void FooHandler(object sender, EventArgs e) {
        this.foo = !this.foo;
        this.ExpireSolution(true);
    }
2 Likes