generic ASCII horizontal or vertical scrollbar feature...very handy

exec/load/scrollbar.js

+/*
+	generic scrollbar for Synchronet
+	3/24/2009 - Matt Johnson (MCMLXXIX)
+*/
+
+function Scrollbar(firstx,firsty,lastx,lasty,color)
+{
+	this.first;
+	this.last;
+	this.orientation;
+	this.color=color?color:'\1n';
+
+	this.init=function(fx,fy,lx,ly)
+	{
+		this.first={'x':fx,'y':fy};
+		this.last={'x':lx,'y':ly};
+		
+		if(fx==lx) 		this.orientation=1;
+		else if(fy==ly) this.orientation=0;
+		else exit(); //if scrollbar orientation is not vertical or horizontal do not continue
+	}
+	this.draw=function(position, total)
+	{
+		if(!this.first || !this.last) return; 		//if no start or end points initialized, do not draw
+		if(!position || position>total) 
+		{
+			return;		//if position is invalid, do not draw
+		}
+		
+		var percentage=position/total;
+		
+		if(this.orientation==1) this.drawVert(percentage);
+		else this.drawHoriz(percentage);
+	}
+	this.drawVert=function(percentage)
+	{
+		var length=this.last.y-this.first.y-1;
+		if(length==0) return; //who needs a zero length scrollbar?
+		
+		var index=parseInt(percentage*length);
+		
+		console.gotoxy(this.first.x,this.first.y);
+		console.putmsg(this.color + "\1h" + ascii(30));
+		for(i=1;i<=length;i++)
+		{
+			console.down();
+			console.left();
+			if(i==index) console.putmsg(this.color + '\1h\xDB');
+			else console.putmsg('\1n' + this.color + '\xB0');
+		}
+		console.down();
+		console.left();
+		console.putmsg(this.color + "\1h" + ascii(31));
+	}
+	this.drawHoriz=function(percentage)
+	{
+		var length=this.last.x-this.first.x-1;
+		if(length==0) return; //who needs a zero length scrollbar?
+		
+		var index=parseInt(percentage*length);
+		
+		console.gotoxy(this.first.x,this.first.y);
+		console.putmsg(this.color + "\1h" + ascii(17));
+		for(i=1;i<=length;i++)
+		{
+			if(i==index) console.putmsg(this.color + '\1h\xDB');
+			else console.putmsg('\1n' + this.color + '\xB0');
+		}
+		console.putmsg(this.color + "\1h" + ascii(16));
+	}
+	if(firstx && firsty && lastx && lasty) 
+	{
+		this.init(firstx,firsty,lastx,lasty);
+	}
+}
\ No newline at end of file