Adding mapbox-gl branch

2015-03-16 18:50:27 +01:00
parent 7985f030fa
commit 57ee7f52fd
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+// Copyright 2006 The Closure Library Authors. All Rights Reserved.
+//
+// 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 A slider implementation that allows to select a value within a
+ * range by dragging a thumb. The selected value is exposed through getValue().
+ *
+ * To decorate, the slider should be bound to an element with the class name
+ * 'goog-slider' containing a child with the class name 'goog-slider-thumb',
+ * whose position is set to relative.
+ * Note that you won't be able to see these elements unless they are styled.
+ *
+ * Slider orientation is horizontal by default.
+ * Use setOrientation(goog.ui.Slider.Orientation.VERTICAL) for a vertical
+ * slider.
+ *
+ * Decorate Example:
+ * <div id="slider" class="goog-slider">
+ *   <div class="goog-slider-thumb"></div>
+ * </div>
+ *
+ * JavaScript code:
+ * <code>
+ *   var slider = new goog.ui.Slider;
+ *   slider.decorate(document.getElementById('slider'));
+ * </code>
+ *
+ * @author arv@google.com (Erik Arvidsson)
+ * @see ../demos/slider.html
+ */
+
+// Implementation note: We implement slider by inheriting from baseslider,
+// which allows to select sub-ranges within a range using two thumbs. All we do
+// is we co-locate the two thumbs into one.
+
+goog.provide('goog.ui.Slider');
+goog.provide('goog.ui.Slider.Orientation');
+
+goog.require('goog.a11y.aria');
+goog.require('goog.a11y.aria.Role');
+goog.require('goog.dom');
+goog.require('goog.ui.SliderBase');
+
+
+
+/**
+ * This creates a slider object.
+ * @param {goog.dom.DomHelper=} opt_domHelper Optional DOM helper.
+ * @param {(function(number):?string)=} opt_labelFn An optional function mapping
+ *     slider values to a description of the value.
+ * @constructor
+ * @extends {goog.ui.SliderBase}
+ */
+goog.ui.Slider = function(opt_domHelper, opt_labelFn) {
+  goog.ui.SliderBase.call(this, opt_domHelper, opt_labelFn);
+  this.rangeModel.setExtent(0);
+};
+goog.inherits(goog.ui.Slider, goog.ui.SliderBase);
+goog.tagUnsealableClass(goog.ui.Slider);
+
+
+/**
+ * Expose Enum of superclass (representing the orientation of the slider) within
+ * Slider namespace.
+ *
+ * @enum {string}
+ */
+goog.ui.Slider.Orientation = goog.ui.SliderBase.Orientation;
+
+
+/**
+ * The prefix we use for the CSS class names for the slider and its elements.
+ * @type {string}
+ */
+goog.ui.Slider.CSS_CLASS_PREFIX = goog.getCssName('goog-slider');
+
+
+/**
+ * CSS class name for the single thumb element.
+ * @type {string}
+ */
+goog.ui.Slider.THUMB_CSS_CLASS =
+    goog.getCssName(goog.ui.Slider.CSS_CLASS_PREFIX, 'thumb');
+
+
+/**
+ * Returns CSS class applied to the slider element.
+ * @param {goog.ui.SliderBase.Orientation} orient Orientation of the slider.
+ * @return {string} The CSS class applied to the slider element.
+ * @protected
+ * @override
+ */
+goog.ui.Slider.prototype.getCssClass = function(orient) {
+  return orient == goog.ui.SliderBase.Orientation.VERTICAL ?
+      goog.getCssName(goog.ui.Slider.CSS_CLASS_PREFIX, 'vertical') :
+      goog.getCssName(goog.ui.Slider.CSS_CLASS_PREFIX, 'horizontal');
+};
+
+
+/** @override */
+goog.ui.Slider.prototype.createThumbs = function() {
+  // find thumb
+  var element = this.getElement();
+  var thumb = goog.dom.getElementsByTagNameAndClass(
+      null, goog.ui.Slider.THUMB_CSS_CLASS, element)[0];
+  if (!thumb) {
+    thumb = this.createThumb_();
+    element.appendChild(thumb);
+  }
+  this.valueThumb = this.extentThumb = thumb;
+};
+
+
+/**
+ * Creates the thumb element.
+ * @return {!HTMLDivElement} The created thumb element.
+ * @private
+ */
+goog.ui.Slider.prototype.createThumb_ = function() {
+  var thumb =
+      this.getDomHelper().createDom('div', goog.ui.Slider.THUMB_CSS_CLASS);
+  goog.a11y.aria.setRole(thumb, goog.a11y.aria.Role.BUTTON);
+  return /** @type {!HTMLDivElement} */ (thumb);
+};
+