private attachPinsIOEvents()

in sim/visuals/microbit.ts [1223:1283]
59 lines of code
11 McCabe index (conditional complexity)

        private attachPinsIOEvents() {
            this.pins.forEach((pin, index) => {
                if (!this.board.edgeConnectorState.pins[index]) return;
                let pt = this.element.createSVGPoint();
                svg.buttonEvents(pin,
                    // move
                    ev => {
                        let state = this.board;
                        let pin = state.edgeConnectorState.pins[index];
                        let svgpin = this.pins[index];
                        if (pin.mode & PinFlags.Input) {
                            let cursor = svg.cursorPoint(pt, this.element, ev);
                            let v = (400 - cursor.y) / 40 * 1023
                            pin.value = Math.max(0, Math.min(1023, Math.floor(v)));
                        }
                        this.updatePin(pin, index);
                    },
                    // start
                    ev => {
                        let state = this.board;
                        let pin = state.edgeConnectorState.pins[index];
                        let svgpin = this.pins[index];
                        U.addClass(svgpin, "touched");
                        if (pin.mode & PinFlags.Input) {
                            let cursor = svg.cursorPoint(pt, this.element, ev);
                            let v = (400 - cursor.y) / 40 * 1023
                            pin.value = Math.max(0, Math.min(1023, Math.floor(v)));
                        }
                        this.updatePin(pin, index);
                    },
                    // stop
                    (ev: MouseEvent) => {
                        let state = this.board;
                        let pin = state.edgeConnectorState.pins[index];
                        let svgpin = this.pins[index];
                        U.removeClass(svgpin, "touched");
                        this.updatePin(pin, index);
                        return false;
                    },
                    // keydown
                    (ev: KeyboardEvent) => {
                        let charCode = (typeof ev.which == "number") ? ev.which : ev.keyCode
                        let state = this.board;
                        let pin = state.edgeConnectorState.pins[index];

                        if (charCode === 40 || charCode === 37) { // Down/Left arrow
                            pin.value -= 10;
                            if (pin.value < 0) {
                                pin.value = 1023;
                            }
                            this.updatePin(pin, index);
                        } else if (charCode === 38 || charCode === 39) { // Up/Right arrow
                            pin.value += 10;
                            if (pin.value > 1023) {
                                pin.value = 0;
                            }
                            this.updatePin(pin, index);
                        }
                    });
            })
        }