scrollmc

/*
 * _scrollmc( mc:MovieClip, mask:MovieClip )
 *
 * Rend un clip scrollable comme un champ texte
 *
 * 01/06/05 - Philippe
 *
 */
_global._scrollmc = function(mc, mask, scroll_track, scroll_bar) {
	trace(mc+", "+mask);
	// evenements
	ASBroadcaster.initialize(mc);
 
	// proprietes
	mc.setMask(mask);
	mc.mask = mask;
	mc.oy = mc._y;
	mc.scroll = 1;
	mc.bottomScroll = mask._height;
	mc.maxscroll = mc._height-mask._height;
 
	mc.scroll_track = scroll_track;
	mc.scroll_bar = scroll_bar;
	scroll_bar.oy = scroll_bar._y;
	scroll_bar._height = (scroll_track._height * mask._height) / mc._height;
 
	//***********************  scroll avec la bar
	scroll_bar.mc = mc;
	scroll_bar.scroll_track = scroll_track;
	scroll_bar.scroll_bar = scroll_bar;
	scroll_bar.onRelease = function(){ delete this.onEnterFrame; }
	scroll_bar.onReleaseOutside = scroll_bar.onRelease;
	scroll_bar.onPress = function(){
		this.mouse_oy = _root._ymouse - this._y;
		trace(this.mouse_oy);
		scroll_bar.onEnterFrame = function(){
			this._y += ( Math.min(Math.max(_root._ymouse-this.mouse_oy, this.scroll_track._y) , this.scroll_track._y + this.scroll_track._height - this._height) - this._y ) * .5;
			var new_scroll = ((this._y - this.scroll_bar.oy) * this.mc.maxscroll) / (this.scroll_track._height-this._height);
			this.mc.scroll = new_scroll;
		}
	}
 
 
	// reactivite de la propriete scroll
	mc.addProperty("scroll",
		function() {
			return Math.min( Math.max(1,this.scroll), this.maxscroll);
		},
		function(value) {
			// verification valeur
			value = Math.round(value);
			value = Math.min( Math.max(1,value), this.maxscroll);
			if (value == this.scroll) return;
			// maj
			this.scroll = value;
			// scrollbar
			var new_scroll_bar_y = this.scroll_bar.oy + Math.round(this.scroll * (this.scroll_track._height-this.scroll_bar._height) / this.maxscroll);
			this.scroll_bar._y = new_scroll_bar_y;
			// /scrollbar
			this._y = this.oy-value;
			this.maxscroll = Math.max(1, this._height+4 - this.mask._height);
			this.bottomScroll = value + this.mask._height;
			this._y = this.oy-value;
			// retour
			this.broadcastMessage("onScroller", this);
		}
	)
 
	trace(mc.scroll+" "+mc.maxscroll);
}