Jerky mouse movement on BorderContainer

It seem when I trying to drag the bordercontainer to move along x-axis position on mouse down. It appear to move stable but became jerky when I drag a little faster.

Any way to get bordercontainer move with smooth motion?

private function mDownHandler(e开发者_Python百科vent:MouseEvent):void {
    gMouseX = event.localX;
    borderCntr.addEventListener(MouseEvent.MOUSE_MOVE, mMoveHandler);
}

private function mMoveHandler(event:MouseEvent):void {
    borderCntr.x = int(event.localX)-gMouseX;
}

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are you targeting mobile devices? MouseEvent.MOUSE_MOVE is quite intensive for mobile devices since it calls many more times faster than the framerate. it's not optimized nor recommended to use MouseEvent.MOUSE_MOVE for projects with mobile deployment targets.

instead, create your own moving logic by employing either the stageX and stageY properties or startDrag() and stopDrag() functions with an Event.ENTER_FRAME event.

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1) You shouldn't use local coordinates in your mMoveHandler, because it's coordinates of mouse inside borderCntr - it simply couldn't work as you wish to. Use parent's or top level application's mouseX or simply event.stageX.

2) Don't add MouseEvent.MOUSE_MOVE listener to borderCntr. When you will make very quick movement and mouse will walk outside borderCntr, you simply won't recieve move events anymore. Instead listen to parent or stage or top level application (again), the one that would not loose mouse.