TooltipContent.js

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.
*/

var zrUtil = require("zrender/lib/core/util");

var zrColor = require("zrender/lib/tool/color");

var eventUtil = require("zrender/lib/core/event");

var env = require("zrender/lib/core/env");

var formatUtil = require("../../util/format");

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.
*/
var each = zrUtil.each;
var toCamelCase = formatUtil.toCamelCase;
var vendors = ['', '-webkit-', '-moz-', '-o-'];
var gCssText = 'position:absolute;display:block;border-style:solid;white-space:nowrap;z-index:9999999;';
/**
 * @param {number} duration
 * @return {string}
 * @inner
 */

function assembleTransition(duration) {
  var transitionCurve = 'cubic-bezier(0.23, 1, 0.32, 1)';
  var transitionText = 'left ' + duration + 's ' + transitionCurve + ',' + 'top ' + duration + 's ' + transitionCurve;
  return zrUtil.map(vendors, function (vendorPrefix) {
    return vendorPrefix + 'transition:' + transitionText;
  }).join(';');
}
/**
 * @param {Object} textStyle
 * @return {string}
 * @inner
 */


function assembleFont(textStyleModel) {
  var cssText = [];
  var fontSize = textStyleModel.get('fontSize');
  var color = textStyleModel.getTextColor();
  color && cssText.push('color:' + color);
  cssText.push('font:' + textStyleModel.getFont());
  fontSize && cssText.push('line-height:' + Math.round(fontSize * 3 / 2) + 'px');
  each(['decoration', 'align'], function (name) {
    var val = textStyleModel.get(name);
    val && cssText.push('text-' + name + ':' + val);
  });
  return cssText.join(';');
}
/**
 * @param {Object} tooltipModel
 * @return {string}
 * @inner
 */


function assembleCssText(tooltipModel) {
  var cssText = [];
  var transitionDuration = tooltipModel.get('transitionDuration');
  var backgroundColor = tooltipModel.get('backgroundColor');
  var textStyleModel = tooltipModel.getModel('textStyle');
  var padding = tooltipModel.get('padding'); // Animation transition. Do not animate when transitionDuration is 0.

  transitionDuration && cssText.push(assembleTransition(transitionDuration));

  if (backgroundColor) {
    if (env.canvasSupported) {
      cssText.push('background-Color:' + backgroundColor);
    } else {
      // for ie
      cssText.push('background-Color:#' + zrColor.toHex(backgroundColor));
      cssText.push('filter:alpha(opacity=70)');
    }
  } // Border style


  each(['width', 'color', 'radius'], function (name) {
    var borderName = 'border-' + name;
    var camelCase = toCamelCase(borderName);
    var val = tooltipModel.get(camelCase);
    val != null && cssText.push(borderName + ':' + val + (name === 'color' ? '' : 'px'));
  }); // Text style

  cssText.push(assembleFont(textStyleModel)); // Padding

  if (padding != null) {
    cssText.push('padding:' + formatUtil.normalizeCssArray(padding).join('px ') + 'px');
  }

  return cssText.join(';') + ';';
}
/**
 * @alias module:echarts/component/tooltip/TooltipContent
 * @constructor
 */


function TooltipContent(container, api) {
  if (env.wxa) {
    return null;
  }

  var el = document.createElement('div');
  var zr = this._zr = api.getZr();
  this.el = el;
  this._x = api.getWidth() / 2;
  this._y = api.getHeight() / 2;
  container.appendChild(el);
  this._container = container;
  this._show = false;
  /**
   * @private
   */

  this._hideTimeout;
  var self = this;

  el.onmouseenter = function () {
    // clear the timeout in hideLater and keep showing tooltip
    if (self._enterable) {
      clearTimeout(self._hideTimeout);
      self._show = true;
    }

    self._inContent = true;
  };

  el.onmousemove = function (e) {
    e = e || window.event;

    if (!self._enterable) {
      // Try trigger zrender event to avoid mouse
      // in and out shape too frequently
      var handler = zr.handler;
      eventUtil.normalizeEvent(container, e, true);
      handler.dispatch('mousemove', e);
    }
  };

  el.onmouseleave = function () {
    if (self._enterable) {
      if (self._show) {
        self.hideLater(self._hideDelay);
      }
    }

    self._inContent = false;
  };
}

TooltipContent.prototype = {
  constructor: TooltipContent,

  /**
   * @private
   * @type {boolean}
   */
  _enterable: true,

  /**
   * Update when tooltip is rendered
   */
  update: function () {
    // FIXME
    // Move this logic to ec main?
    var container = this._container;
    var stl = container.currentStyle || document.defaultView.getComputedStyle(container);
    var domStyle = container.style;

    if (domStyle.position !== 'absolute' && stl.position !== 'absolute') {
      domStyle.position = 'relative';
    } // Hide the tooltip
    // PENDING
    // this.hide();

  },
  show: function (tooltipModel) {
    clearTimeout(this._hideTimeout);
    var el = this.el;
    el.style.cssText = gCssText + assembleCssText(tooltipModel) // http://stackoverflow.com/questions/21125587/css3-transition-not-working-in-chrome-anymore
    + ';left:' + this._x + 'px;top:' + this._y + 'px;' + (tooltipModel.get('extraCssText') || '');
    el.style.display = el.innerHTML ? 'block' : 'none'; // If mouse occsionally move over the tooltip, a mouseout event will be
    // triggered by canvas, and cuase some unexpectable result like dragging
    // stop, "unfocusAdjacency". Here `pointer-events: none` is used to solve
    // it. Although it is not suppored by IE8~IE10, fortunately it is a rare
    // scenario.

    el.style.pointerEvents = this._enterable ? 'auto' : 'none';
    this._show = true;
  },
  setContent: function (content) {
    this.el.innerHTML = content == null ? '' : content;
  },
  setEnterable: function (enterable) {
    this._enterable = enterable;
  },
  getSize: function () {
    var el = this.el;
    return [el.clientWidth, el.clientHeight];
  },
  moveTo: function (x, y) {
    // xy should be based on canvas root. But tooltipContent is
    // the sibling of canvas root. So padding of ec container
    // should be considered here.
    var zr = this._zr;
    var viewportRootOffset;

    if (zr && zr.painter && (viewportRootOffset = zr.painter.getViewportRootOffset())) {
      x += viewportRootOffset.offsetLeft;
      y += viewportRootOffset.offsetTop;
    }

    var style = this.el.style;
    style.left = x + 'px';
    style.top = y + 'px';
    this._x = x;
    this._y = y;
  },
  hide: function () {
    this.el.style.display = 'none';
    this._show = false;
  },
  hideLater: function (time) {
    if (this._show && !(this._inContent && this._enterable)) {
      if (time) {
        this._hideDelay = time; // Set show false to avoid invoke hideLater mutiple times

        this._show = false;
        this._hideTimeout = setTimeout(zrUtil.bind(this.hide, this), time);
      } else {
        this.hide();
      }
    }
  },
  isShow: function () {
    return this._show;
  },
  getOuterSize: function () {
    var width = this.el.clientWidth;
    var height = this.el.clientHeight; // Consider browser compatibility.
    // IE8 does not support getComputedStyle.

    if (document.defaultView && document.defaultView.getComputedStyle) {
      var stl = document.defaultView.getComputedStyle(this.el);

      if (stl) {
        width += parseInt(stl.paddingLeft, 10) + parseInt(stl.paddingRight, 10) + parseInt(stl.borderLeftWidth, 10) + parseInt(stl.borderRightWidth, 10);
        height += parseInt(stl.paddingTop, 10) + parseInt(stl.paddingBottom, 10) + parseInt(stl.borderTopWidth, 10) + parseInt(stl.borderBottomWidth, 10);
      }
    }

    return {
      width: width,
      height: height
    };
  }
};
var _default = TooltipContent;
module.exports = _default;