Method CallFunc

core/funcbutton.go:329–377

CallFunc calls the function associated with this button, prompting the user for any arguments.

()

// CallFunc calls the function associated with this button,
// prompting the user for any arguments.
func (fb *FuncButton) CallFunc() {
	if !fb.reflectFunc.IsValid() {
		return
	}
	ctx := fb.goodContext()
	if len(fb.Args) == 0 {
		if !fb.Confirm {
			fb.callFuncShowReturns()
			return
		}
		fb.confirmDialog()
		return
	}
	d := NewBody().AddTitle(fb.Text).AddText(fb.Tooltip)
	str := funcArgsToStruct(fb.Args)
	sv := NewForm(d).SetStruct(str.Addr().Interface())

	accept := func() {
		for i := range fb.Args {
			fb.Args[i].Value = str.Field(i).Interface()
		}
		fb.callFuncShowReturns()
	}

	// If there is a single value button, automatically
	// open its dialog instead of this one
	if len(fb.Args) == 1 {
		sv.UpdateWidget() // need to update first
		bt := AsButton(sv.Child(1))
		if bt != nil {
			bt.OnFinal(events.Change, func(e events.Event) {
				// the dialog for the argument has been accepted, so we call the function
				accept()
			})
			bt.Scene = fb.Scene // we must use this scene for context
			bt.Send(events.Click)
			return
		}
	}

	d.AddBottomBar(func(parent Widget) {
		d.AddCancel(parent)
		d.AddOK(parent).SetText(fb.Text).OnClick(func(e events.Event) {
			d.Close() // note: the other Close event happens too late!
			accept()
		})
	})
	d.RunDialog(ctx)
}

// funcArgsToStruct converts a slice of [FuncArg] objects
// to a new non-pointer struct [reflect.Value].