Fix #100 - ability to define scale factor

.bowerrc

@@ -0,0 +1,3 @@
+{
+  "directory": "bower_components"
+}

src/sequence-diagram.js

@@ -214,7 +214,7 @@
 			return this._paper.rect(x, y, w, h);
 		},
 
-		draw : function(container) {
+		draw : function(container, options) {
 			var diagram = this.diagram;
 			this.init_paper(container);
 			this.init_font();
@@ -224,7 +224,8 @@
 			var title_height = this._title ? this._title.height : 0;
 
 			this._paper.setStart();
-			this._paper.setSize(diagram.width, diagram.height);
+			this._paper.setSize(diagram.width * options.scale, diagram.height * options.scale);
+			this._paper.setViewBox(0, 0, diagram.width, diagram.height);
 
 			var y = DIAGRAM_MARGIN + title_height;
 
@@ -625,7 +626,8 @@
 
 	Diagram.prototype.drawSVG = function (container, options) {
 		var default_options = {
-			theme: 'hand'
+			theme: 'hand',
+			scale: 1
 		};
 
 		options = _.defaults(options || {}, default_options);
@@ -634,7 +636,7 @@
 			throw new Error("Unsupported theme: " + options.theme);
 
 		var drawing = new themes[options.theme](this);
-		drawing.draw(container);
+		drawing.draw(container, options);
 
 	}; // end of drawSVG
 

test/test.html

@@ -8,14 +8,14 @@
         <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
         <title></title>
     </head>
- 
+
     	<textarea id="language" rows="10" cols="50">
 #Note left of A: Note to the\n left of A
 #Note right of A: Note to the\n right of A
 #Note over A: Note over A
 Note over A,B: Note over A,B
     	</textarea>
-    	<button id="parse" type="button">Click Me!</button>  
+    	<button id="parse" type="button">Click Me!</button>
 
     	<div id="diagram"></div>
 
@@ -44,7 +44,7 @@
                         var diagram = Diagram.parse($('#language').val());
                         console.log(diagram);
 
-                        diagram.drawSVG('diagram', {theme: 'hand'});
+                        diagram.drawSVG('diagram', {theme: 'simple', scale: 2});
                     //} catch (e) {
                     //    console.log(e);
                     //}