When we move the pointer, we perform the following tasks:
Pointer is down
Select a bubble in the global variable
Check whether the bubble can be moved into this position
Swap two neighbor bubbles
The ready slideBubble handler looks like this:
function slideBubble(pointer, x, y, fromClick) {
if (window.selectedBubble && pointer.isDown)
{
var cursorBubblePosX = getBubblePos(x);
var cursorBubblePosY = getBubblePos(y);
if (checkIfBubbleCanBeMovedHere(
window.selectedBubbleStartPos.x,
window.selectedBubbleStartPos.y,
cursorBubblePosX,
cursorBubblePosY))
{
if (cursorBubblePosX !== window.selectedBubble.posX ||
cursorBubblePosY !== window.selectedBubble.posY)
{
bubbles.bringToTop(window.selectedBubble);
tempShiftedBubble = getBubble(cursorBubblePosX, cursorBubblePosY);
...