blocks_common/colour.js

/**
 * @license
 * Visual Blocks Editor
 *
 * Copyright 2012 Google Inc.
 * https://developers.google.com/blockly/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @fileoverview Colour blocks for Blockly.
 * @author fraser@google.com (Neil Fraser)
 */
'use strict';

goog.provide('Blockly.Blocks.colour');

goog.require('Blockly.Blocks');

goog.require('Blockly.constants');

/**
 * Pick a random colour.
 * @return {string} #RRGGBB for random colour.
 */
function randomColour() {
  var num = Math.floor(Math.random() * Math.pow(2, 24));
  return '#' + ('00000' + num.toString(16)).substr(-6);
}

Blockly.Blocks['colour_picker'] = {
  /**
   * Block for colour picker.
   * @this Blockly.Block
   */
  init: function() {
    this.jsonInit({
      "message0": "%1",
      "args0": [
        {
          "type": "field_colour_slider",
          "name": "COLOUR",
          "colour": randomColour()
        }
      ],
      "outputShape": Blockly.OUTPUT_SHAPE_ROUND,
      "output": "Colour"
    });
  }
};