ronin/scripts/modules/cursor.js

function Cursor(rune)
{
  Module.call(this,rune);
  
  this.parameters = [Rect,Position,Bang];
  this.variables  = {};

  this.mode = null;
  this.position = new Position();
  this.magnetism = null;
  this.grid = new Position(4,4);

  this.element = null;

  this.passive = function(cmd)
  {
    if(!cmd.rect()){ return; }

    if(!this.layer){ this.create_layer(); }

    this.layer.clear();
    this.draw(cmd.rect(),cmd.position());
  }

  this.active = function(cmd)
  {
    if(cmd.bang()){
      this.magnetism = null;
      if(this.layer){ this.layer.remove(this); }
      return;
    }

    if(!this.layer){ this.create_layer(); }

    this.layer.clear();

    if(cmd.position()){
      this.grid = cmd.position();
    }

    if(cmd.rect()){
      this.magnetism = cmd.rect();
      this.draw(cmd.rect(),this.grid);
    }
  }

  this.draw = function(rect,grid)
  {
    if(rect.width < 5 || rect.height < 5){ return; }

    var horizontal = ronin.surface.size.width/rect.width;
    var vertical = ronin.surface.size.height/rect.height;
    
    for (var x = 1; x < horizontal; x++) {
      for (var y = 1; y < vertical; y++) {
        var dot_position = new Position(x * rect.width, y * rect.height);
        var size = 0.5;
        if(grid && x % grid.x == 0 && y % grid.y == 0){ size = 1; }
        this.draw_marker(dot_position,size);
      }
    }
  }

  this.draw_marker = function(position,size = 0.5)
  {
    var context = this.layer.context();
    context.beginPath();
    context.arc(position.x, position.y, size, 0, 2 * Math.PI, false);
    context.fillStyle = 'white';
    context.fill();
  }

  this.update = function(event)
  {
    if(ronin.module){
      this.set_mode(ronin.module);
    }
    else if(event.altKey == true && event.shiftKey == true){
      this.set_mode(ronin.surface.active_layer);
    }
    else if(event.altKey == true){
      this.set_mode(ronin.default);
    }
    else{
      this.set_mode(ronin.brush);
    }
  }
  
  this.set_mode = function(mode)
  {
    if(this.mode == mode){ return; }
    this.mode = mode;
    document.body.setAttribute("class",this.mode.constructor.name);
  }

  // 

  this.magnetic_position = function(position)
  {
    var x = parseInt(position.x / this.magnetism.width) * this.magnetism.width;
    var y = parseInt(position.y / this.magnetism.width) * this.magnetism.width;

    return new Position(x,y);
  }

  this.update_element = function(position)
  {
    position = ronin.position_in_window(position);

    var radius = this.mode && this.mode.size ? this.mode.size : 5;

    this.element.setAttribute("style","left:"+(position.x + window.innerWidth/2)+"px;top:"+(position.y + window.innerHeight/2)+"px;width:"+radius+"px;height:"+radius+"px;margin-left:"+(-(radius/2)-1)+"px;margin-top:"+(-(radius/2)-1)+"px;border:1px solid "+(this.mode && this.mode.color ? this.mode.color.hex : ronin.brush.color.hex));
  }

  //
  
  this.mouse_down = function(position)
  {
    if(this.magnetism){
      position = this.magnetic_position(position);
    }

    this.position = position;

    if(this.mode.constructor.name != Cursor.name){
      this.mode.mouse_from = position;
      this.mode.mouse_down(position);  
    }
  }
  
  this.mouse_move = function(position)
  {
    if(this.mode.mouse_from == null){ return; }

    if(this.magnetism){
      position = this.magnetic_position(position);
    }
    this.update_element(position);

    this.position = position;

    var rect = new Rect();
    rect.width = this.position.x - this.mode.mouse_from.x;
    rect.height = this.position.y - this.mode.mouse_from.y;

    if(this.mode.constructor.name != Cursor.name){
      this.mode.mouse_move(position,rect);  
    }

  }
  
  this.mouse_up = function(position)
  {
    if(this.magnetism){
      position = this.magnetic_position(position);
    }

    this.position = position;

    var rect = new Rect();
    rect.width = this.position.x - this.mode.mouse_from.x;
    rect.height = this.position.y - this.mode.mouse_from.y;

    if(this.mode.constructor.name != Cursor.name){
      this.mode.mouse_up(position,rect);  
    }
    ronin.terminal.input_element.focus();

    this.mode.mouse_from = null;
  }
}