/* Copyright (C) Taku Kudo <taku@chasen.org>, Ben Bullock
Licensed under the GNU General Public Licence.
 */function write_canvas_advert()
{var canvas_advert=getbyid("canvas-advert");canvas_advert.style.display="block";}
function DrawCanvas()
{var canvas=getbyid("drawkanji-canvas");this.size=canvas.offsetWidth;this.element=canvas;var self=this;}
DrawCanvas.prototype.clear=function()
{clear(this.element);}
DrawCanvas.prototype._draw_dot=function(x,y)
{var dot=document.createElement("span");dot.style.left=x+this.offset_left+"px";dot.style.top=y+this.offset_top+"px";dot.className="drawkanji-dot";this.element.appendChild(dot);}
DrawCanvas.prototype.start_line=function(x,y)
{this.x=x;this.y=y;}
DrawCanvas.prototype.draw_line=function(x,y)
{if(this.x==x&&this.y==y)return;var x_move=x-this.x;var y_move=y-this.y;var x_diff=x_move<0?1:-1;var y_diff=y_move<0?1:-1;if(Math.abs(x_move)>=Math.abs(y_move)){for(var i=x_move;i!=0;i+=x_diff){this._draw_dot(x-i,y-Math.round(y_move*i/x_move));}}else{for(var i=y_move;i!=0;i+=y_diff){this._draw_dot(x-Math.round(x_move*i/y_move),y-i);}}
this.x=x;this.y=y;}
DrawCanvas.prototype.draw_text=function(x,y,text)
{var text_node=document.createTextNode(text);var dot=document.createElement("span");dot.appendChild(text_node);dot.style.left=x+this.offset_left+"px";dot.style.top=y+this.offset_top+"px";dot.className="drawkanji-stroke-number";this.element.appendChild(dot);}