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path: root/js/ui/brush.js
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var brush = (function(){
	
	var brush = new Matrix (5, 5, function(x,y){
		var lex = new Lex (x,y)
		lex.build()
		return lex
	})

	brush.modified = false

  brush.bind = function(){

		var last_point = [0,0]
		var dragging = false

  	brush.forEach(function(lex, x, y){

  		if (lex.bound) return
  		lex.bound = true
  		
			var point = [x,y]
			lex.span.addEventListener('contextmenu', function(e){
				e.preventDefault()
			})
			lex.span.addEventListener('mousedown', function(e){
				e.preventDefault()
				current_canvas = brush
				brush.modified = true
				dragging = true
				erasing = (e.which == "3" || e.ctrlKey)
				if (erasing) {
					lex.clear()
				}
				else {
					lex.fill(brush.fg, brush.bg)
				}
				lex.focus()
			})
			lex.span.addEventListener('mousemove', function(e){
				e.preventDefault()
				if (! dragging) {
					return
				}
				erasing = (e.which == "3" || e.ctrlKey)
				if (erasing) {
					lex.clear()
				}
				else {
					lex.fill(brush.fg, brush.bg)
				}
				lex.focus()
			})
		})
		window.addEventListener("mouseup", function(){
			dragging = false
		})
	}

  brush.expand = function(i){
    var w = this.w = clamp(this.w+i, 1, 9), h = this.h = clamp(this.h+i, 1, 9)
    controls.width.char = ""+w
    controls.width.build()
    controls.height.char = ""+h
    controls.height.build()
    this.rebuild()
  }
  brush.contract = function(i){
    this.expand(-i)
  }

	brush.char = " "
	brush.fg = 0
	brush.bg = 1
	brush.opacity = 1
	
	brush.draw_fg = true
	brush.draw_bg = true
	brush.draw_char = true
	
	return brush

})()