192 lines
4.6 KiB
JavaScript
192 lines
4.6 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.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.MapEvent');
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goog.require('ol.MapEventType');
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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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/**
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* @constructor
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* @extends {ol.control.Control}
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* @param {ol.control.MousePositionOptions} mousePositionOptions Mouse position
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* options.
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*/
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ol.control.MousePosition = function(mousePositionOptions) {
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var element = goog.dom.createDom(goog.dom.TagName.DIV, {
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'class': 'ol-mouse-position'
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});
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goog.base(this, {
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element: element,
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map: mousePositionOptions.map,
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target: mousePositionOptions.target
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});
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/**
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* @private
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* @type {ol.Projection|undefined}
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*/
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this.projection_ = mousePositionOptions.projection;
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/**
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* @private
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* @type {ol.CoordinateFormatType|undefined}
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*/
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this.coordinateFormat_ = mousePositionOptions.coordinateFormat;
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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(mousePositionOptions.undefinedHTML) ?
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mousePositionOptions.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_ = ol.Projection.identityTransform;
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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.renderedProjection_ = 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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* @private
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* @type {Array.<?number>}
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*/
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this.listenerKeys_ = 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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* @param {ol.MapEvent} mapEvent Map event.
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* @protected
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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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this.mapProjection_ = frameState.view2DState.projection;
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}
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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.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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var pixel = new ol.Pixel(eventPosition.x, eventPosition.y);
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this.updateHTML_(pixel);
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this.lastMouseMovePixel_ = pixel;
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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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if (!goog.isNull(this.listenerKeys_)) {
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goog.array.forEach(this.listenerKeys_, goog.events.unlistenByKey);
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this.listenerKeys_ = null;
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}
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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_ = [
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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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goog.events.listen(map, ol.MapEventType.POSTRENDER,
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this.handleMapPostrender, false, this)
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];
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}
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};
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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)) {
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if (this.renderedProjection_ != this.mapProjection_) {
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if (goog.isDef(this.projection_)) {
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this.transform_ = ol.Projection.getTransform(
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this.mapProjection_, this.projection_);
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} else {
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this.transform_ = ol.Projection.identityTransform;
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}
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this.renderedProjection_ = this.mapProjection_;
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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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coordinate = this.transform_(coordinate);
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if (goog.isDef(this.coordinateFormat_)) {
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html = this.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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