Move ol/control/scalelinecontrol.js to ol/control/scaleline.js
This commit is contained in:
Tim Schaub
284
src/ol/control/scaleline.js
Normal file
284
src/ol/control/scaleline.js
Normal file
@@ -0,0 +1,284 @@
|
||||
goog.provide('ol.control.ScaleLine');
|
||||
goog.provide('ol.control.ScaleLineUnits');
|
||||
|
||||
goog.require('ol.events');
|
||||
goog.require('ol');
|
||||
goog.require('ol.Object');
|
||||
goog.require('ol.control.Control');
|
||||
goog.require('ol.css');
|
||||
goog.require('ol.proj.METERS_PER_UNIT');
|
||||
goog.require('ol.proj.Units');
|
||||
|
||||
|
||||
/**
|
||||
* @enum {string}
|
||||
*/
|
||||
ol.control.ScaleLineProperty = {
|
||||
UNITS: 'units'
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Units for the scale line. Supported values are `'degrees'`, `'imperial'`,
|
||||
* `'nautical'`, `'metric'`, `'us'`.
|
||||
* @enum {string}
|
||||
*/
|
||||
ol.control.ScaleLineUnits = {
|
||||
DEGREES: 'degrees',
|
||||
IMPERIAL: 'imperial',
|
||||
NAUTICAL: 'nautical',
|
||||
METRIC: 'metric',
|
||||
US: 'us'
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @classdesc
|
||||
* A control displaying rough y-axis distances, calculated for the center of the
|
||||
* viewport. For conformal projections (e.g. EPSG:3857, the default view
|
||||
* projection in OpenLayers), the scale is valid for all directions.
|
||||
* No scale line will be shown when the y-axis distance of a pixel at the
|
||||
* viewport center cannot be calculated in the view projection.
|
||||
* By default the scale line will show in the bottom left portion of the map,
|
||||
* but this can be changed by using the css selector `.ol-scale-line`.
|
||||
*
|
||||
* @constructor
|
||||
* @extends {ol.control.Control}
|
||||
* @param {olx.control.ScaleLineOptions=} opt_options Scale line options.
|
||||
* @api stable
|
||||
*/
|
||||
ol.control.ScaleLine = function(opt_options) {
|
||||
|
||||
var options = opt_options ? opt_options : {};
|
||||
|
||||
var className = options.className !== undefined ? options.className : 'ol-scale-line';
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Element}
|
||||
*/
|
||||
this.innerElement_ = document.createElement('DIV');
|
||||
this.innerElement_.className = className + '-inner';
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {Element}
|
||||
*/
|
||||
this.element_ = document.createElement('DIV');
|
||||
this.element_.className = className + ' ' + ol.css.CLASS_UNSELECTABLE;
|
||||
this.element_.appendChild(this.innerElement_);
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {?olx.ViewState}
|
||||
*/
|
||||
this.viewState_ = null;
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {number}
|
||||
*/
|
||||
this.minWidth_ = options.minWidth !== undefined ? options.minWidth : 64;
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {boolean}
|
||||
*/
|
||||
this.renderedVisible_ = false;
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {number|undefined}
|
||||
*/
|
||||
this.renderedWidth_ = undefined;
|
||||
|
||||
/**
|
||||
* @private
|
||||
* @type {string}
|
||||
*/
|
||||
this.renderedHTML_ = '';
|
||||
|
||||
var render = options.render ? options.render : ol.control.ScaleLine.render;
|
||||
|
||||
ol.control.Control.call(this, {
|
||||
element: this.element_,
|
||||
render: render,
|
||||
target: options.target
|
||||
});
|
||||
|
||||
ol.events.listen(
|
||||
this, ol.Object.getChangeEventType(ol.control.ScaleLineProperty.UNITS),
|
||||
this.handleUnitsChanged_, this);
|
||||
|
||||
this.setUnits(/** @type {ol.control.ScaleLineUnits} */ (options.units) ||
|
||||
ol.control.ScaleLineUnits.METRIC);
|
||||
|
||||
};
|
||||
ol.inherits(ol.control.ScaleLine, ol.control.Control);
|
||||
|
||||
|
||||
/**
|
||||
* @const
|
||||
* @type {Array.<number>}
|
||||
*/
|
||||
ol.control.ScaleLine.LEADING_DIGITS = [1, 2, 5];
|
||||
|
||||
|
||||
/**
|
||||
* Return the units to use in the scale line.
|
||||
* @return {ol.control.ScaleLineUnits|undefined} The units to use in the scale
|
||||
* line.
|
||||
* @observable
|
||||
* @api stable
|
||||
*/
|
||||
ol.control.ScaleLine.prototype.getUnits = function() {
|
||||
return /** @type {ol.control.ScaleLineUnits|undefined} */ (
|
||||
this.get(ol.control.ScaleLineProperty.UNITS));
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Update the scale line element.
|
||||
* @param {ol.MapEvent} mapEvent Map event.
|
||||
* @this {ol.control.ScaleLine}
|
||||
* @api
|
||||
*/
|
||||
ol.control.ScaleLine.render = function(mapEvent) {
|
||||
var frameState = mapEvent.frameState;
|
||||
if (!frameState) {
|
||||
this.viewState_ = null;
|
||||
} else {
|
||||
this.viewState_ = frameState.viewState;
|
||||
}
|
||||
this.updateElement_();
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
ol.control.ScaleLine.prototype.handleUnitsChanged_ = function() {
|
||||
this.updateElement_();
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Set the units to use in the scale line.
|
||||
* @param {ol.control.ScaleLineUnits} units The units to use in the scale line.
|
||||
* @observable
|
||||
* @api stable
|
||||
*/
|
||||
ol.control.ScaleLine.prototype.setUnits = function(units) {
|
||||
this.set(ol.control.ScaleLineProperty.UNITS, units);
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
ol.control.ScaleLine.prototype.updateElement_ = function() {
|
||||
var viewState = this.viewState_;
|
||||
|
||||
if (!viewState) {
|
||||
if (this.renderedVisible_) {
|
||||
this.element_.style.display = 'none';
|
||||
this.renderedVisible_ = false;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
var center = viewState.center;
|
||||
var projection = viewState.projection;
|
||||
var metersPerUnit = projection.getMetersPerUnit();
|
||||
var pointResolution =
|
||||
projection.getPointResolution(viewState.resolution, center) *
|
||||
metersPerUnit;
|
||||
|
||||
var nominalCount = this.minWidth_ * pointResolution;
|
||||
var suffix = '';
|
||||
var units = this.getUnits();
|
||||
if (units == ol.control.ScaleLineUnits.DEGREES) {
|
||||
var metersPerDegree = ol.proj.METERS_PER_UNIT[ol.proj.Units.DEGREES];
|
||||
pointResolution /= metersPerDegree;
|
||||
if (nominalCount < metersPerDegree / 60) {
|
||||
suffix = '\u2033'; // seconds
|
||||
pointResolution *= 3600;
|
||||
} else if (nominalCount < metersPerDegree) {
|
||||
suffix = '\u2032'; // minutes
|
||||
pointResolution *= 60;
|
||||
} else {
|
||||
suffix = '\u00b0'; // degrees
|
||||
}
|
||||
} else if (units == ol.control.ScaleLineUnits.IMPERIAL) {
|
||||
if (nominalCount < 0.9144) {
|
||||
suffix = 'in';
|
||||
pointResolution /= 0.0254;
|
||||
} else if (nominalCount < 1609.344) {
|
||||
suffix = 'ft';
|
||||
pointResolution /= 0.3048;
|
||||
} else {
|
||||
suffix = 'mi';
|
||||
pointResolution /= 1609.344;
|
||||
}
|
||||
} else if (units == ol.control.ScaleLineUnits.NAUTICAL) {
|
||||
pointResolution /= 1852;
|
||||
suffix = 'nm';
|
||||
} else if (units == ol.control.ScaleLineUnits.METRIC) {
|
||||
if (nominalCount < 1) {
|
||||
suffix = 'mm';
|
||||
pointResolution *= 1000;
|
||||
} else if (nominalCount < 1000) {
|
||||
suffix = 'm';
|
||||
} else {
|
||||
suffix = 'km';
|
||||
pointResolution /= 1000;
|
||||
}
|
||||
} else if (units == ol.control.ScaleLineUnits.US) {
|
||||
if (nominalCount < 0.9144) {
|
||||
suffix = 'in';
|
||||
pointResolution *= 39.37;
|
||||
} else if (nominalCount < 1609.344) {
|
||||
suffix = 'ft';
|
||||
pointResolution /= 0.30480061;
|
||||
} else {
|
||||
suffix = 'mi';
|
||||
pointResolution /= 1609.3472;
|
||||
}
|
||||
} else {
|
||||
ol.assert(false, 33); // Invalid units
|
||||
}
|
||||
|
||||
var i = 3 * Math.floor(
|
||||
Math.log(this.minWidth_ * pointResolution) / Math.log(10));
|
||||
var count, width;
|
||||
while (true) {
|
||||
count = ol.control.ScaleLine.LEADING_DIGITS[((i % 3) + 3) % 3] *
|
||||
Math.pow(10, Math.floor(i / 3));
|
||||
width = Math.round(count / pointResolution);
|
||||
if (isNaN(width)) {
|
||||
this.element_.style.display = 'none';
|
||||
this.renderedVisible_ = false;
|
||||
return;
|
||||
} else if (width >= this.minWidth_) {
|
||||
break;
|
||||
}
|
||||
++i;
|
||||
}
|
||||
|
||||
var html = count + ' ' + suffix;
|
||||
if (this.renderedHTML_ != html) {
|
||||
this.innerElement_.innerHTML = html;
|
||||
this.renderedHTML_ = html;
|
||||
}
|
||||
|
||||
if (this.renderedWidth_ != width) {
|
||||
this.innerElement_.style.width = width + 'px';
|
||||
this.renderedWidth_ = width;
|
||||
}
|
||||
|
||||
if (!this.renderedVisible_) {
|
||||
this.element_.style.display = '';
|
||||
this.renderedVisible_ = true;
|
||||
}
|
||||
|
||||
};
|
||||
Reference in New Issue
Block a user