adds support for generic components

sim/visuals/genericpart.ts

@@ -1,16 +1,35 @@
 
 namespace pxsim.visuals {
-    export class GenericComponentView implements IBoardComponent<any> {
-        public style: string;
+    export class GenericPart implements IBoardComponent<any> {
+        public style: string = "";
         public element: SVGElement;
-        defs: SVGElement[];
-        init(bus: EventBus, state: any, svgEl: SVGSVGElement, gpioPins: string[], otherArgs: string[]): void {
+        defs: SVGElement[] = [];
+
+        constructor(partVisual: PartVisualDefinition) {
+            let imgAndSize = mkImageSVG({
+                image: partVisual.image,
+                width: partVisual.width,
+                height: partVisual.height,
+                imageUnitDist: partVisual.pinDist,
+                targetUnitDist: PIN_DIST
+            });
+            let img = imgAndSize.el;
+            let scaleFn = mkScaleFn(partVisual.pinDist, PIN_DIST);
+            let [pinX, pinY] = partVisual.firstPin;
+            let left = -scaleFn(pinX);
+            let top = -scaleFn(pinY);
+            translateEl(img, [left, top]); // So that 0,0 is on the first pin
+            this.element = svg.elt("g");
+            this.element.appendChild(img);
         }
+
         moveToCoord(xy: Coord): void {
+            translateEl(this.element, xy);
         }
-        updateState(): void {
-        }
-        updateTheme(): void {
-        }
+
+        //unused
+        init(bus: EventBus, state: any, svgEl: SVGSVGElement, gpioPins: string[], otherArgs: string[]): void { }
+        updateState(): void { }
+        updateTheme(): void { }
     }
 }