Draw Gitter mit HTML5 Canvas
function setGrid(paper, gridSize, color) {
// Set grid size on the JointJS paper object (joint.dia.Paper instance)
paper.options.gridSize = gridSize;
// Draw a grid into the HTML 5 canvas and convert it to a data URI image
var canvas = $('<canvas/>', { width: gridSize, height: gridSize });
canvas[0].width = gridSize;
canvas[0].height = gridSize;
var context = canvas[0].getContext('2d');
context.beginPath();
context.rect(1, 1, 1, 1);
context.fillStyle = color || '#AAAAAA';
context.fill();
// Finally, set the grid background image of the paper container element.
var gridBackgroundImage = canvas[0].toDataURL('image/png');
paper.$el.css('background-image', 'url("' + gridBackgroundImage + '")');
}
// Example usage:
setGrid(paper, 10, '#FF0000');