Set a max window size of brush

src/scripts/main-genome-browser.ts

@@ -159,6 +159,7 @@ function getGenomeBrowserData(state: State) {
         title: chromosomeTitle + " (" + chromosomeSize + " bp)",
         interval: chromInterval,
         window,
+        maxWindowSize: chromosomeSize,
         eventHandler: {
           brushed: brushedCallback
         }

src/scripts/types.ts

@@ -29,6 +29,7 @@ export interface GenericAxisData {
 
 export interface BrushableAxisData extends GenericAxisData {
   window: [number, number],
+  maxWindowSize: number,
   eventHandler?: {
     brushed: (scale: ScaleLinear<number, number>) => void
   }