draw

I'm using this script on the body onmousemove function: function lineDraw() { // Get the context and the canvas: var canvas = document.getElementById("myCanvas"); var context = canvas.getContext("2d"); // Clear the last canvas context.clearRect(0, 0, canvas.width, canvas.height); // Draw the line: context.moveTo(0, 0); context.lineTo(event.clientX, event.clientY); context.stroke(); } It's supposed to clear the canvas each time I move the mouse around, and draw a new line, but it isn't working properly. I'm trying to solve it without using jQuery, mouse listeners or similar. Here is a demo:

I'm working on a project in which I am trying to make a paint program. So far I've used Netbeans to create a GUI and set up the program. As of right now I am able to call all the coordinated necessary to draw inside it but I am very confused with how to actually paint inside it. Towards the end of my code I have a failed attempt at drawing inside the panel. Can anyone explain/show how to use graphics in a example like this? All examples I have found make a class and extend it with JPanel but I don't know if I can do this since it was generated in netbeans. I need to draw inside a JPanel ,

I want to draw a Free Hand Polygon on the Map in Google Map V2 . This task was possible with Overlay Map V1 but Google Map has removed that class from V2. (Per this Google Map V2 has Remove Overlay Class ). Good Example for Google Map V1 to draw free style polygon. In Map V2, we can draw a polygon programmatically with the help of Google Official Doc but what should a user do? I have found Unclear answer for Map V2 I started with simple Google Map & draw polygon to do this programmatically & it is working properly but now I am looking for how a user can draw? I don't want to draw based on the