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Add 'units' property to ol.control.ScaleLine

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This commit is contained in:
Frederic Junod
2013-06-19 17:00:00 +02:00
parent cbf0402471
commit 9d63217778
3 changed files with 90 additions and 28 deletions
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101
src/ol/control/scalelinecontrol.js
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@@ -1,21 +1,32 @@
goog.provide('ol.control.ScaleLine');
goog.provide('ol.control.ScaleLineProperty');
goog.provide('ol.control.ScaleLineUnits');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.dom');
goog.require('goog.dom.TagName');
goog.require('goog.events');
goog.require('goog.math');
goog.require('goog.style');
goog.require('ol.FrameState');
goog.require('ol.Object');
goog.require('ol.ProjectionUnits');
goog.require('ol.TransformFunction');
goog.require('ol.View2DState');
goog.require('ol.control.Control');
goog.require('ol.css');
goog.require('ol.proj');
goog.require('ol.sphere.NORMAL');
/**
* @enum {string}
*/
ol.control.ScaleLineProperty = {
UNITS: 'units'
};
/**
* @enum {string}
*/
@@ -71,16 +82,15 @@ ol.control.ScaleLine = function(opt_options) {
/**
* @private
* @type {number}
* @type {?ol.View2DState}
*/
this.minWidth_ = goog.isDef(options.minWidth) ? options.minWidth : 64;
this.view2DState_ = null;
/**
* @private
* @type {ol.control.ScaleLineUnits}
* @type {number}
*/
this.units_ = goog.isDef(options.units) ?
options.units : ol.control.ScaleLineUnits.METRIC;
this.minWidth_ = goog.isDef(options.minWidth) ? options.minWidth : 64;
/**
* @private
@@ -112,6 +122,12 @@ ol.control.ScaleLine = function(opt_options) {
target: options.target
});
goog.events.listen(
this, ol.Object.getChangeEventType(ol.control.ScaleLineProperty.UNITS),
this.handleUnitsChanged_, false, this);
this.setUnits(options.units || ol.control.ScaleLineUnits.METRIC);
};
goog.inherits(ol.control.ScaleLine, ol.control.Control);
@@ -123,21 +139,60 @@ goog.inherits(ol.control.ScaleLine, ol.control.Control);
ol.control.ScaleLine.LEADING_DIGITS = [1, 2, 5];
/**
* @return {ol.control.ScaleLineUnits|undefined} units.
*/
ol.control.ScaleLine.prototype.getUnits = function() {
return /** @type {ol.control.ScaleLineUnits|undefined} */ (
this.get(ol.control.ScaleLineProperty.UNITS));
};
goog.exportProperty(
ol.control.ScaleLine.prototype,
'getUnits',
ol.control.ScaleLine.prototype.getUnits);
/**
* @inheritDoc
*/
ol.control.ScaleLine.prototype.handleMapPostrender = function(mapEvent) {
this.updateElement_(mapEvent.frameState);
var frameState = mapEvent.frameState;
if (goog.isNull(frameState)) {
this.view2DState_ = null;
} else {
this.view2DState_ = frameState.view2DState;
}
this.updateElement_();
};
/**
* @param {?ol.FrameState} frameState Frame state.
* @private
*/
ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
ol.control.ScaleLine.prototype.handleUnitsChanged_ = function() {
this.updateElement_();
};
if (goog.isNull(frameState)) {
/**
* @param {ol.control.ScaleLineUnits} units Units.
*/
ol.control.ScaleLine.prototype.setUnits = function(units) {
this.set(ol.control.ScaleLineProperty.UNITS, units);
};
goog.exportProperty(
ol.control.ScaleLine.prototype,
'setUnits',
ol.control.ScaleLine.prototype.setUnits);
/**
* @private
*/
ol.control.ScaleLine.prototype.updateElement_ = function() {
var view2DState = this.view2DState_;
if (goog.isNull(view2DState)) {
if (this.renderedVisible_) {
goog.style.showElement(this.element_, false);
this.renderedVisible_ = false;
@@ -145,7 +200,6 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
return;
}
var view2DState = frameState.view2DState;
var center = view2DState.center;
var projection = view2DState.projection;
var pointResolution =
@@ -153,9 +207,10 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
var projectionUnits = projection.getUnits();
var cosLatitude;
var units = this.getUnits();
if (projectionUnits == ol.ProjectionUnits.DEGREES &&
(this.units_ == ol.control.ScaleLineUnits.METRIC ||
this.units_ == ol.control.ScaleLineUnits.IMPERIAL)) {
(units == ol.control.ScaleLineUnits.METRIC ||
units == ol.control.ScaleLineUnits.IMPERIAL)) {
// Convert pointResolution from degrees to meters
this.toEPSG4326_ = null;
@@ -165,7 +220,7 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
} else if ((projectionUnits == ol.ProjectionUnits.FEET ||
projectionUnits == ol.ProjectionUnits.METERS) &&
this.units_ == ol.control.ScaleLineUnits.DEGREES) {
units == ol.control.ScaleLineUnits.DEGREES) {
// Convert pointResolution from meters or feet to degrees
if (goog.isNull(this.toEPSG4326_)) {
@@ -181,21 +236,19 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
projectionUnits = ol.ProjectionUnits.DEGREES;
} else {
this.toEPSG4326_ = null;
}
goog.asserts.assert(
((this.units_ == ol.control.ScaleLineUnits.METRIC ||
this.units_ == ol.control.ScaleLineUnits.IMPERIAL) &&
((units == ol.control.ScaleLineUnits.METRIC ||
units == ol.control.ScaleLineUnits.IMPERIAL) &&
projectionUnits == ol.ProjectionUnits.METERS) ||
(this.units_ == ol.control.ScaleLineUnits.DEGREES &&
(units == ol.control.ScaleLineUnits.DEGREES &&
projectionUnits == ol.ProjectionUnits.DEGREES));
var nominalCount = this.minWidth_ * pointResolution;
var suffix = '';
if (this.units_ == ol.control.ScaleLineUnits.DEGREES) {
if (units == ol.control.ScaleLineUnits.DEGREES) {
if (nominalCount < 1 / 60) {
suffix = '\u2033'; // seconds
pointResolution *= 3600;
@@ -205,7 +258,7 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
} else {
suffix = '\u00b0'; // degrees
}
} else if (this.units_ == ol.control.ScaleLineUnits.IMPERIAL) {
} else if (units == ol.control.ScaleLineUnits.IMPERIAL) {
if (nominalCount < 0.9144) {
suffix = 'in';
pointResolution /= 0.0254;
@@ -216,10 +269,10 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
suffix = 'mi';
pointResolution /= 1609.344;
}
} else if (this.units_ == ol.control.ScaleLineUnits.NAUTICAL) {
} else if (units == ol.control.ScaleLineUnits.NAUTICAL) {
pointResolution /= 1852;
suffix = 'nm';
} else if (this.units_ == ol.control.ScaleLineUnits.METRIC) {
} else if (units == ol.control.ScaleLineUnits.METRIC) {
if (nominalCount < 1) {
suffix = 'mm';
pointResolution *= 1000;
@@ -229,7 +282,7 @@ ol.control.ScaleLine.prototype.updateElement_ = function(frameState) {
suffix = 'km';
pointResolution /= 1000;
}
} else if (this.units_ == ol.control.ScaleLineUnits.US) {
} else if (units == ol.control.ScaleLineUnits.US) {
if (nominalCount < 0.9144) {
suffix = 'in';
pointResolution *= 39.37;