| /* |
| * 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 htrace = htrace || {}; |
| |
| // Check if a point is inside a bounding box. |
| htrace.inBoundingBox = function(x, y, x0, xF, y0, yF) { |
| return ((x >= x0) && (x <= xF) && (y >= y0) && (y <= yF)); |
| } |
| |
| // Manages a set of widgets on the canvas. |
| // Buttons and sliders are both widgets. |
| htrace.WidgetManager = function(params) { |
| this.listeners = { |
| "mouseDown": [], |
| "mouseUp": [], |
| "mouseMove": [], |
| "mouseOut": [], |
| "dblclick": [], |
| "draw": [], |
| }; |
| |
| this.register = function(type, widget) { |
| this.listeners[type].push(widget); |
| } |
| |
| this.registerHighPriority = function(type, widget) { |
| this.listeners[type].unshift(widget); |
| } |
| |
| this.unregister = function(type, widget) { |
| this.listeners[type] = _.without(this.listeners[type], widget); |
| } |
| |
| this.handle = function(e) { |
| // Make a copy of the listeners, in case the handling functions change the |
| // array. |
| var listeners = this.listeners[e.type].slice(); |
| var len = listeners.length; |
| for (var i = 0; i < len; i++) { |
| if (!listeners[i].handle(e)) { |
| break; |
| } |
| } |
| }; |
| |
| for (var k in params) { |
| this[k]=params[k]; |
| } |
| return this; |
| }; |