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PODrawing pathin real time using KineticJS
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copied!<p>I want to draw a path on my canvas on the fly. I know how to do this is using following HTML5 canvas code:</p> <pre><code>$('#drawing-canvas').mousedown(function(e){ startx = e.pageX; starty = e.pageY; cxt.beginPath(); cxt.moveTo(startx,starty); }); $('#drawing-canvas').mousemove(function(e){ cxt.lineTo(e.pageX,e.pageY); cxt.strokeStyle='red'; cxt.lineWidth = 1; cxt.stroke(); }); </code></pre> <p>My question is how do I accomplish the same thing using KineticJS.</p> <p>Update:</p> <p>I think something like this may work.</p> <pre><code> $('#container').mousemove(function(e){ var pen = new Kinetic.Shape({ drawFunc: function(canvas) { var context = canvas.getContext(); if(moving == false){ // grab the start xy coords from mousedown event context.beginPath(); context.moveTo(startx,starty); moving = true; } context.lineTo(e.pageX,e.pageY); context.strokeStyle='#ff00ff'; context.lineWidth = 1; context.stroke(); } penlayer.add(pen); stage.add(penlayer); }); }); </code></pre> <p>However, handling the beginPath() and moveTo(..) is proving to be problematic. I need to set these on a mousedown event. Any ideas?</p> <p>Update:</p> <p>The effect I am trying to get can be seen by selecting the pen option at <a href="http://www.redshiftsolutions.com/demos/whiteboard/whiteboard.html" rel="nofollow">http://www.redshiftsolutions.com/demos/whiteboard/whiteboard.html</a>. This is a simple collaborative whiteboard that uses canvas and jQuery. I want to transition this to KineticJS because of the added drag and drop functionality.</p>

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