7ac845503f
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.5-rc5@4831 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
348 lines
11 KiB
JavaScript
348 lines
11 KiB
JavaScript
/* Copyright (c) 2006-2007 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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*
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* Class: OpenLayers.Control.MouseDefaults
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*
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* Inherits from:
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* - <OpenLayers.Control>
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*/
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OpenLayers.Control.MouseDefaults = OpenLayers.Class(OpenLayers.Control, {
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/** WARNING WARNING WARNING!!!
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This class is DEPRECATED in 2.4 and will be removed by 3.0.
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If you need this functionality, use Control.Navigation instead!!! */
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/**
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* Property: performedDrag
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* {Boolean}
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*/
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performedDrag: false,
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/**
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* Property: wheelObserver
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* {Function}
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*/
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wheelObserver: null,
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/**
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* Constructor: OpenLayers.Control.MouseDefaults
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*/
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initialize: function() {
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OpenLayers.Control.prototype.initialize.apply(this, arguments);
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},
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/**
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* APIMethod: destroy
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*/
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destroy: function() {
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if (this.handler) {
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this.handler.destroy();
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}
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this.handler = null;
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this.map.events.unregister( "click", this, this.defaultClick );
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this.map.events.unregister( "dblclick", this, this.defaultDblClick );
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this.map.events.unregister( "mousedown", this, this.defaultMouseDown );
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this.map.events.unregister( "mouseup", this, this.defaultMouseUp );
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this.map.events.unregister( "mousemove", this, this.defaultMouseMove );
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this.map.events.unregister( "mouseout", this, this.defaultMouseOut );
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//unregister mousewheel events specifically on the window and document
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OpenLayers.Event.stopObserving(window, "DOMMouseScroll",
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this.wheelObserver);
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OpenLayers.Event.stopObserving(window, "mousewheel",
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this.wheelObserver);
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OpenLayers.Event.stopObserving(document, "mousewheel",
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this.wheelObserver);
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this.wheelObserver = null;
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OpenLayers.Control.prototype.destroy.apply(this, arguments);
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},
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/**
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* Method: draw
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*/
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draw: function() {
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this.map.events.register( "click", this, this.defaultClick );
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this.map.events.register( "dblclick", this, this.defaultDblClick );
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this.map.events.register( "mousedown", this, this.defaultMouseDown );
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this.map.events.register( "mouseup", this, this.defaultMouseUp );
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this.map.events.register( "mousemove", this, this.defaultMouseMove );
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this.map.events.register( "mouseout", this, this.defaultMouseOut );
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this.registerWheelEvents();
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},
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/**
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* Method: registerWheelEvents
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*/
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registerWheelEvents: function() {
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this.wheelObserver = OpenLayers.Function.bindAsEventListener(
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this.onWheelEvent, this
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);
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//register mousewheel events specifically on the window and document
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OpenLayers.Event.observe(window, "DOMMouseScroll", this.wheelObserver);
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OpenLayers.Event.observe(window, "mousewheel", this.wheelObserver);
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OpenLayers.Event.observe(document, "mousewheel", this.wheelObserver);
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},
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/**
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* Method: defaultClick
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*
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* Parameters:
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* evt - {Event}
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*
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* Returns:
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* {Boolean}
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*/
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defaultClick: function (evt) {
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if (!OpenLayers.Event.isLeftClick(evt)) return;
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var notAfterDrag = !this.performedDrag;
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this.performedDrag = false;
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return notAfterDrag;
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},
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/**
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* Method: defaultDblClick
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*
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* Parameters:
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* evt - {Event}
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*/
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defaultDblClick: function (evt) {
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var newCenter = this.map.getLonLatFromViewPortPx( evt.xy );
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this.map.setCenter(newCenter, this.map.zoom + 1);
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OpenLayers.Event.stop(evt);
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return false;
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},
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/**
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* Method: defaultMouseDown
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*
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* Parameters:
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* evt - {Event}
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*/
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defaultMouseDown: function (evt) {
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if (!OpenLayers.Event.isLeftClick(evt)) return;
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this.mouseDragStart = evt.xy.clone();
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this.performedDrag = false;
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if (evt.shiftKey) {
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this.map.div.style.cursor = "crosshair";
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this.zoomBox = OpenLayers.Util.createDiv('zoomBox',
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this.mouseDragStart,
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null,
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null,
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"absolute",
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"2px solid red");
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this.zoomBox.style.backgroundColor = "white";
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this.zoomBox.style.filter = "alpha(opacity=50)"; // IE
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this.zoomBox.style.opacity = "0.50";
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this.zoomBox.style.fontSize = "1px";
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this.zoomBox.style.zIndex = this.map.Z_INDEX_BASE["Popup"] - 1;
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this.map.viewPortDiv.appendChild(this.zoomBox);
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}
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document.onselectstart=function() { return false; }
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OpenLayers.Event.stop(evt);
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},
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/**
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* Method: defaultMouseMove
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*
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* Parameters:
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* evt - {Event}
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*/
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defaultMouseMove: function (evt) {
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// record the mouse position, used in onWheelEvent
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this.mousePosition = evt.xy.clone();
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if (this.mouseDragStart != null) {
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if (this.zoomBox) {
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var deltaX = Math.abs(this.mouseDragStart.x - evt.xy.x);
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var deltaY = Math.abs(this.mouseDragStart.y - evt.xy.y);
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this.zoomBox.style.width = Math.max(1, deltaX) + "px";
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this.zoomBox.style.height = Math.max(1, deltaY) + "px";
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if (evt.xy.x < this.mouseDragStart.x) {
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this.zoomBox.style.left = evt.xy.x+"px";
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}
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if (evt.xy.y < this.mouseDragStart.y) {
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this.zoomBox.style.top = evt.xy.y+"px";
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}
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} else {
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var deltaX = this.mouseDragStart.x - evt.xy.x;
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var deltaY = this.mouseDragStart.y - evt.xy.y;
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var size = this.map.getSize();
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var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX,
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size.h / 2 + deltaY);
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var newCenter = this.map.getLonLatFromViewPortPx( newXY );
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this.map.setCenter(newCenter, null, true);
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this.mouseDragStart = evt.xy.clone();
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this.map.div.style.cursor = "move";
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}
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this.performedDrag = true;
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}
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},
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/**
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* Method: defaultMouseUp
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*
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* Parameters:
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* evt - {<OpenLayers.Event>}
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*/
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defaultMouseUp: function (evt) {
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if (!OpenLayers.Event.isLeftClick(evt)) return;
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if (this.zoomBox) {
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this.zoomBoxEnd(evt);
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} else {
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if (this.performedDrag) {
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this.map.setCenter(this.map.center);
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}
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}
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document.onselectstart=null;
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this.mouseDragStart = null;
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this.map.div.style.cursor = "";
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},
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/**
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* Method: defaultMouseOut
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*
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* Parameters:
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* evt - {Event}
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*/
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defaultMouseOut: function (evt) {
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if (this.mouseDragStart != null &&
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OpenLayers.Util.mouseLeft(evt, this.map.div)) {
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if (this.zoomBox) {
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this.removeZoomBox();
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}
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this.mouseDragStart = null;
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}
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},
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/**
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* Method: defaultWheelUp
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* User spun scroll wheel up
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*
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*/
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defaultWheelUp: function(evt) {
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if (this.map.getZoom() <= this.map.getNumZoomLevels()) {
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this.map.setCenter(this.map.getLonLatFromPixel(evt.xy),
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this.map.getZoom() + 1);
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}
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},
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/**
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* Method: defaultWheelDown
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* User spun scroll wheel down
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*/
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defaultWheelDown: function(evt) {
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if (this.map.getZoom() > 0) {
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this.map.setCenter(this.map.getLonLatFromPixel(evt.xy),
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this.map.getZoom() - 1);
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}
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},
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/**
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* Method: zoomBoxEnd
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* Zoombox function.
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*/
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zoomBoxEnd: function(evt) {
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if (this.mouseDragStart != null) {
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if (Math.abs(this.mouseDragStart.x - evt.xy.x) > 5 ||
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Math.abs(this.mouseDragStart.y - evt.xy.y) > 5) {
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var start = this.map.getLonLatFromViewPortPx( this.mouseDragStart );
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var end = this.map.getLonLatFromViewPortPx( evt.xy );
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var top = Math.max(start.lat, end.lat);
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var bottom = Math.min(start.lat, end.lat);
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var left = Math.min(start.lon, end.lon);
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var right = Math.max(start.lon, end.lon);
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var bounds = new OpenLayers.Bounds(left, bottom, right, top);
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this.map.zoomToExtent(bounds);
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} else {
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var end = this.map.getLonLatFromViewPortPx( evt.xy );
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this.map.setCenter(new OpenLayers.LonLat(
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(end.lon),
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(end.lat)
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), this.map.getZoom() + 1);
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}
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this.removeZoomBox();
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}
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},
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/**
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* Method: removeZoomBox
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* Remove the zoombox from the screen and nullify our reference to it.
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*/
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removeZoomBox: function() {
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this.map.viewPortDiv.removeChild(this.zoomBox);
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this.zoomBox = null;
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},
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/**
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* Mouse ScrollWheel code thanks to http://adomas.org/javascript-mouse-wheel/
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*/
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/**
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* Method: onWheelEvent
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* Catch the wheel event and handle it xbrowserly
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*
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* Parameters:
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* e - {Event}
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*/
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onWheelEvent: function(e){
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// first determine whether or not the wheeling was inside the map
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var inMap = false;
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var elem = OpenLayers.Event.element(e);
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while(elem != null) {
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if (this.map && elem == this.map.div) {
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inMap = true;
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break;
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}
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elem = elem.parentNode;
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}
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if (inMap) {
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var delta = 0;
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if (!e) {
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e = window.event;
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}
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if (e.wheelDelta) {
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delta = e.wheelDelta/120;
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if (window.opera) {
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delta = -delta;
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}
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} else if (e.detail) {
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delta = -e.detail / 3;
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}
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if (delta) {
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// add the mouse position to the event because mozilla has a bug
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// with clientX and clientY (see https://bugzilla.mozilla.org/show_bug.cgi?id=352179)
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// getLonLatFromViewPortPx(e) returns wrong values
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e.xy = this.mousePosition;
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if (delta < 0) {
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this.defaultWheelDown(e);
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} else {
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this.defaultWheelUp(e);
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}
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}
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//only wheel the map, not the window
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OpenLayers.Event.stop(e);
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}
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},
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CLASS_NAME: "OpenLayers.Control.MouseDefaults"
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});
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