Draw deletion in MPR

[ychyss]

When I use draw under MPR layout, there is a deletion error.

The first window is normal. But the others(coronal and sigittal) cannot delete drawings.

I traced this bug, find that:
In draw.js->setShapeOn->shapeGroup.on('dragmove.draw'), the scale of this.#trash may be negtive, and the trashHalfHeight may be negetive, so the condition don't work.

if (Math.abs(eventPos.x - this.#trash.x()) < trashHalfWidth &&
        Math.abs(eventPos.y - this.#trash.y()) < trashHalfHeight) {
...
}

just add a abs on this value in both shapeGroup.on('dragmove.draw') and shapeGroup.on('dragend.draw'):

// 这里由于scale可能出现负数，因此取绝对值
const trashHalfWidth =
  Math.abs(this.#trash.width() * this.#trash.scaleX() / 2);
const trashHalfHeight =
  Math.abs(this.#trash.height() * this.#trash.scaleY() / 2);

now,it works! :-)

[ivmartel]

Thanks for reporting and finding a solution!