130 lines
5 KiB
JavaScript
130 lines
5 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
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* text of the license. */
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// @require: OpenLayers/Control.js
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OpenLayers.Control.MouseDefaults = Class.create();
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OpenLayers.Control.MouseDefaults.prototype =
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Object.extend( new OpenLayers.Control(), {
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performedDrag: false,
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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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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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},
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defaultClick: function (evt) {
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if (!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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* @param {Event} evt
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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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},
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/**
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* @param {Event} evt
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*/
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defaultMouseDown: function (evt) {
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if (!Event.isLeftClick(evt)) return;
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this.mouseDragStart = evt.xy.copyOf();
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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.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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Event.stop(evt);
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},
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/**
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* @param {Event} evt
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*/
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defaultMouseMove: function (evt) {
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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 = deltaX+"px";
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this.zoomBox.style.height = 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.copyOf();
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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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* @param {Event} evt
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*/
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defaultMouseUp: function (evt) {
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if (!Event.isLeftClick(evt)) return;
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if (this.zoomBox) {
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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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var zoom = this.map.getZoomForExtent(bounds);
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this.map.setCenter(new OpenLayers.LonLat(
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(start.lon + end.lon) / 2,
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(start.lat + end.lat) / 2
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), zoom);
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this.map.viewPortDiv.removeChild(document.getElementById("zoomBox"));
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this.zoomBox = null;
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} else {
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this.map.setCenter(this.map.center);
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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 = "default";
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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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this.defaultMouseUp(evt);
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}
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}
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});
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