251 lines
6.5 KiB
JavaScript
251 lines
6.5 KiB
JavaScript
// FIXME should listen on appropriate pane, once it is defined
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// FIXME works for View2D only
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goog.provide('ol.control.MousePosition');
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goog.require('goog.array');
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goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('goog.events');
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goog.require('goog.events.EventType');
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goog.require('goog.style');
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goog.require('ol.CoordinateFormatType');
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goog.require('ol.Object');
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goog.require('ol.Pixel');
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goog.require('ol.Projection');
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goog.require('ol.TransformFunction');
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goog.require('ol.control.Control');
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goog.require('ol.proj');
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/**
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* @enum {string}
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*/
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ol.control.MousePositionProperty = {
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PROJECTION: 'projection',
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COORDINATE_FORMAT: 'coordinateFormat'
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};
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/**
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* Create a new control to show the position of the mouse in the map's
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* projection (or any other supplied projection). By default the control is
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* shown in the top right corner of the map but this can be changed by using
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* a css selector .ol-mouse-position.
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*
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* @constructor
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* @extends {ol.control.Control}
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* @param {ol.control.MousePositionOptions=} opt_options Mouse position options.
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*/
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ol.control.MousePosition = function(opt_options) {
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var options = goog.isDef(opt_options) ? opt_options : {};
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var className = goog.isDef(options.className) ?
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options.className : 'ol-mouse-position';
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var element = goog.dom.createDom(goog.dom.TagName.DIV, {
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'class': className
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});
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goog.base(this, {
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element: element,
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target: options.target
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});
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goog.events.listen(this,
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ol.Object.getChangeEventType(ol.control.MousePositionProperty.PROJECTION),
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this.handleProjectionChanged_, false, this);
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if (goog.isDef(options.coordinateFormat)) {
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this.setCoordinateFormat(options.coordinateFormat);
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}
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if (goog.isDef(options.projection)) {
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this.setProjection(ol.proj.get(options.projection));
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}
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/**
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* @private
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* @type {string}
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*/
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this.undefinedHTML_ = goog.isDef(options.undefinedHTML) ?
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options.undefinedHTML : '';
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/**
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* @private
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* @type {string}
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*/
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this.renderedHTML_ = element.innerHTML;
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/**
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* @private
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* @type {ol.Projection}
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*/
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this.mapProjection_ = null;
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/**
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* @private
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* @type {?ol.TransformFunction}
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*/
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this.transform_ = null;
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/**
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* @private
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* @type {ol.Pixel}
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*/
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this.lastMouseMovePixel_ = null;
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};
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goog.inherits(ol.control.MousePosition, ol.control.Control);
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/**
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* @inheritDoc
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*/
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ol.control.MousePosition.prototype.handleMapPostrender = function(mapEvent) {
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var frameState = mapEvent.frameState;
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if (goog.isNull(frameState)) {
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this.mapProjection_ = null;
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} else {
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if (this.mapProjection_ != frameState.view2DState.projection) {
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this.mapProjection_ = frameState.view2DState.projection;
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this.transform_ = null;
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}
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}
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this.updateHTML_(this.lastMouseMovePixel_);
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};
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/**
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* @private
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*/
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ol.control.MousePosition.prototype.handleProjectionChanged_ = function() {
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this.transform_ = null;
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};
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/**
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* @return {ol.CoordinateFormatType|undefined} projection.
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*/
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ol.control.MousePosition.prototype.getCoordinateFormat = function() {
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return /** @type {ol.CoordinateFormatType|undefined} */ (
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this.get(ol.control.MousePositionProperty.COORDINATE_FORMAT));
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};
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goog.exportProperty(
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ol.control.MousePosition.prototype,
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'getCoordinateFormat',
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ol.control.MousePosition.prototype.getCoordinateFormat);
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/**
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* @return {ol.Projection|undefined} projection.
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*/
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ol.control.MousePosition.prototype.getProjection = function() {
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return /** @type {ol.Projection|undefined} */ (
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this.get(ol.control.MousePositionProperty.PROJECTION));
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};
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goog.exportProperty(
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ol.control.MousePosition.prototype,
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'getProjection',
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ol.control.MousePosition.prototype.getProjection);
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @protected
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*/
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ol.control.MousePosition.prototype.handleMouseMove = function(browserEvent) {
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var map = this.getMap();
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var eventPosition = goog.style.getRelativePosition(
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browserEvent, map.getViewport());
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this.lastMouseMovePixel_ = [eventPosition.x, eventPosition.y];
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this.updateHTML_(this.lastMouseMovePixel_);
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};
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/**
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* @param {goog.events.BrowserEvent} browserEvent Browser event.
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* @protected
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*/
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ol.control.MousePosition.prototype.handleMouseOut = function(browserEvent) {
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this.updateHTML_(null);
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this.lastMouseMovePixel_ = null;
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};
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/**
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* @inheritDoc
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*/
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ol.control.MousePosition.prototype.setMap = function(map) {
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goog.base(this, 'setMap', map);
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if (!goog.isNull(map)) {
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var viewport = map.getViewport();
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this.listenerKeys.push(
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goog.events.listen(viewport, goog.events.EventType.MOUSEMOVE,
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this.handleMouseMove, false, this),
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goog.events.listen(viewport, goog.events.EventType.MOUSEOUT,
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this.handleMouseOut, false, this)
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);
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}
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};
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/**
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* @param {ol.CoordinateFormatType} format Coordinate format.
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*/
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ol.control.MousePosition.prototype.setCoordinateFormat = function(format) {
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this.set(ol.control.MousePositionProperty.COORDINATE_FORMAT, format);
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};
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goog.exportProperty(
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ol.control.MousePosition.prototype,
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'setCoordinateFormat',
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ol.control.MousePosition.prototype.setCoordinateFormat);
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/**
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* @param {ol.Projection} projection Projection.
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*/
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ol.control.MousePosition.prototype.setProjection = function(projection) {
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this.set(ol.control.MousePositionProperty.PROJECTION, projection);
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};
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goog.exportProperty(
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ol.control.MousePosition.prototype,
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'setProjection',
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ol.control.MousePosition.prototype.setProjection);
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/**
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* @param {?ol.Pixel} pixel Pixel.
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* @private
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*/
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ol.control.MousePosition.prototype.updateHTML_ = function(pixel) {
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var html = this.undefinedHTML_;
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if (!goog.isNull(pixel) && !goog.isNull(this.mapProjection_)) {
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if (goog.isNull(this.transform_)) {
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var projection = this.getProjection();
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if (goog.isDef(projection)) {
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this.transform_ = ol.proj.getTransformFromProjections(
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this.mapProjection_, projection);
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} else {
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this.transform_ = ol.proj.identityTransform;
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}
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}
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var map = this.getMap();
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var coordinate = map.getCoordinateFromPixel(pixel);
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if (!goog.isNull(coordinate)) {
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this.transform_(coordinate, coordinate);
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var coordinateFormat = this.getCoordinateFormat();
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if (goog.isDef(coordinateFormat)) {
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html = coordinateFormat(coordinate);
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} else {
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html = coordinate.toString();
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}
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}
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}
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if (!goog.isDef(this.renderedHTML_) || html != this.renderedHTML_) {
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this.element.innerHTML = html;
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this.renderedHTML_ = html;
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}
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};
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