DygraphOps now does the right thing with events, which have read-only attributes...

[dygraphs.git] / auto_tests / tests / DygraphOps.js

// Copyright (c) 2011 Google, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.


/** 
 * @fileoverview Utility functions for Dygraphs.
 *
 * @author konigsberg@google.com (Robert Konigsberg)
 */
var DygraphOps = {};

DygraphOps.defaultEvent_ = {
  type : '',
  canBubble : true,
  cancelable : true,
  view : document.defaultView,
  detail : 0,
  screenX : 0,
  screenY : 0,
  clientX : 0,
  clientY : 0,
  ctrlKey : false,
  altKey : false,
  shiftKey : false,
  metaKey : false,
  button : 0,
  relatedTarget : null
};

DygraphOps.createEvent_ = function(command, custom) {

  var copy = function(from, to) {
    if (from != null) {
      for (var prop in from) {
        if(from.hasOwnProperty(prop)) {
          to[prop] = from[prop];
        }
      }
    }
  }

  var e = {};
  copy(DygraphOps.defaultEvent_, e);
  copy(command, e);
  copy(custom, e);

  var event = document.createEvent('MouseEvents');
  event.initMouseEvent(
    e.type,
    e.canBubble,
    e.cancelable,
    e.view, 
    e.detail,
    e.screenX,
    e.screenY,
    e.clientX,
    e.clientY,
    e.ctrlKey,
    e.altKey,
    e.shiftKey,
    e.metaKey,
    e.button,
    e.relatedTarget);
  return event;
}

DygraphOps.dispatchDoubleClick = function(g, custom) {
  var opts = {
    type : 'dblclick',
    detail : 2
  };
  var event = DygraphOps.createEvent_(opts, custom);
  g.canvas_.dispatchEvent(event);
};

DygraphOps.dispatchMouseDown = function(g, x, y, custom) {
  var px = Dygraph.findPosX(g.canvas_);
  var py = Dygraph.findPosY(g.canvas_);

  var pageX = px + g.toDomXCoord(x);
  var pageY = py + g.toDomYCoord(y);

  var opts = {
    type : 'mousedown',
    detail : 1,
    screenX : pageX,
    screenY : pageY,
    clientX : pageX,
    clientY : pageY,
  };

  var event = DygraphOps.createEvent_(opts, custom);
  g.canvas_.dispatchEvent(event);
};

DygraphOps.dispatchMouseMove = function(g, x, y, custom) {
  var px = Dygraph.findPosX(g.canvas_);
  var py = Dygraph.findPosY(g.canvas_);

  var pageX = px + g.toDomXCoord(x);
  var pageY = py + g.toDomYCoord(y);

  var opts = {
    type : 'mousemove',
    screenX : pageX,
    screenY : pageY,
    clientX : pageX,
    clientY : pageY,
  };

  var event = DygraphOps.createEvent_(opts, custom);
  g.canvas_.dispatchEvent(event);
};

DygraphOps.dispatchMouseUp = function(g, x, y, custom) {
  var px = Dygraph.findPosX(g.canvas_);
  var py = Dygraph.findPosY(g.canvas_);

  var pageX = px + g.toDomXCoord(x);
  var pageY = py + g.toDomYCoord(y);

  var opts = {
    type : 'mouseup',
    screenX : pageX,
    screenY : pageY,
    clientX : pageX,
    clientY : pageY,
  };

  var event = DygraphOps.createEvent_(opts, custom);
  g.canvas_.dispatchEvent(event);
};