allow hitStrokeWidth usage, even if a shape has not stroke visible. fix #782

src/Context.ts

@@ -826,7 +826,7 @@ export class HitContext extends Context {
     this.restore();
   }
   _stroke(shape) {
-    if (shape.hasStroke() && shape.hitStrokeWidth()) {
+    if (shape.hasHitStroke()) {
       // ignore strokeScaleEnabled for Text
       var strokeScaleEnabled = shape.getStrokeScaleEnabled();
       if (!strokeScaleEnabled) {

src/Shape.ts

@@ -370,6 +370,16 @@ export class Shape<Config extends ShapeConfig = ShapeConfig> extends Node<
       // this.getStrokeRadialGradientColorStops()
     );
   }
+  hasHitStroke() {
+    const width = this.hitStrokeWidth();
+
+    // we should enable hit stroke we stroke is enabled
+    // and we have some value from width
+    return (
+      this.strokeEnabled() &&
+      (width || this.strokeWidth() && width === 'auto')
+    );
+  }
   /**
    * determines if point is in the shape, regardless if other shapes are on top of it.  Note: because
    *  this method clears a temporary canvas and then redraws the shape, it performs very poorly if executed many times

src/Stage.ts

@@ -241,7 +241,9 @@ export class Stage extends Container<BaseLayer> {
     return this;
   }
   /**
-   * get pointer position which can be a touch position or mouse position
+   * returns absolute pointer position which can be a touch position or mouse position
+   * pointer position doesn't include any transforms (such as scale) of the stage
+   * it is just a plain position of pointer relative to top-left corner of the stage container
    * @method
    * @name Konva.Stage#getPointerPosition
    * @returns {Vector2d|null}