function Keyboard()
{
  this.memory = "";

  this.selector = {x:0,y:0};

  this.select = function(pos)
  {
    this.selector = {x:pos.x * -dotgrid.grid_width,y:pos.y * dotgrid.grid_height};
    dotgrid.move_cursor(this.selector)
    dotgrid.guide.update();
    dotgrid.draw();
  }

  this.deselect = function()
  {
    dotgrid.tool.clear();
    dotgrid.guide.update();
    dotgrid.draw();
  }

  this.confirm = function()
  {
    dotgrid.tool.add_vertex({x:this.selector.x * -1,y:this.selector.y});
    dotgrid.guide.update();
    dotgrid.draw();
  }

  this.erase = function()
  {
    dotgrid.tool.remove_segments_at(this.selector);
    dotgrid.guide.update();
    dotgrid.draw();
  }

  this.move = function(x,y)
  {
    this.selector = {x:this.selector.x+(x*dotgrid.grid_width),y:this.selector.y+(-y*dotgrid.grid_height)}
    dotgrid.move_cursor(this.selector)
    dotgrid.guide.update();
    dotgrid.draw();
  }

  this.push = function(k)
  {
    this.memory = `${this.memory}${k}`;
    if(this.memory.length > 3){
      var pos = {x:parseInt(this.memory.substr(0,2)),y:parseInt(this.memory.substr(2,2))};
      this.select(pos);
      this.memory = "";
    }
  }

  this.reset = function()
  {
    this.memory = "";
    dotgrid.update();
  }

  this.exit = function()
  {
    dotgrid.controller.set();
  }
}