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friendlygiraffe

blitmasking buttons

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Hi, is it possible to BlitMask a MovieClip with buttons in it ? it seems to disable all MouseEvents when I apply it

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Right, when BlitMask's bitmapMode is on (true), it is simply showing pixels in a BitmapData in place of your actual target, so interactivity is lost. However, if you turn bitmapMode off (false), interactivity is restored but you lose the speed benefits because at that point BlitMask is just acting as a regular rectangular mask. Keep in mind, though, that the BlitMask instance itself does dispatch MouseEvents so you could listen for rollovers, rollouts, clicks, etc. on the whole area. You could figure out if the click happened within the button's bounds, you should be able to figure that out with some extra code that compares the mouse position to the location of the button.

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Ok, that's perfect, as I didn't want to have to create a new mask to add MouseEvents. Thanks

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It seems that the MouseEvent is nullified when setting the blitMask.bitmapMode = false;

 

Is there a way of having the Mouse actions working whilst having bitmapMode off ?

 

Here is code. _container has a load of images,buttons and text

 


private var blitMask:BlitMask;

private function buildTabs(e:MouseEvent)
{
  blitMask = new BlitMask(_container, 0, 0, 300, 300,false);
  blitMask.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
  blitMask.bitmapMode = true;
 }
private function mouseDownHandler(event:MouseEvent):void
{
  trace(event);
}

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If the BlitMask were to intercept MouseEvents like that, it would prevent interactivity with the target. Imagine 2 buttons on top of each other, both with MouseEvent.CLICK event listeners - only the top one would be clickable. See what I mean? So in your case, if you want to get the MOUSE_DOWN events even when bitmapMode is false, just add a listener to your target too. Or put an invisible object above both the BlitMask and your object and attach your MouseEvent handlers to that.

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