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new "immediate" option to enable live measuring while moving the mouse. p=patzi,me r=me (closes #2935)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@10917 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
ahocevar
2010-11-24 10:44:01 +00:00
parent 30eabe26ad
commit e970151067
3 changed files with 194 additions and 6 deletions
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49
lib/OpenLayers/Control/Measure.js
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@@ -33,7 +33,8 @@ OpenLayers.Control.Measure = OpenLayers.Class(OpenLayers.Control, {
* will receive an event with measure, units, order, and geometry
* properties.
* measurepartial - Triggered when a new point is added to the
* measurement sketch. Listeners receive an event with measure,
* measurement sketch or if the <immediate> property is true and the
* measurement sketch is modified. Listeners receive an event with measure,
* units, order, and geometry.
*/
EVENT_TYPES: ['measure', 'measurepartial'],
@@ -103,6 +104,14 @@ OpenLayers.Control.Measure = OpenLayers.Class(OpenLayers.Control, {
*/
persist: false,
/**
* APIProperty: immediate
* {Boolean} Activates the immediate measurement so that the "measurepartial"
* event is also fired once the measurement sketch is modified.
* Default is false.
*/
immediate : false,
/**
* Constructor: OpenLayers.Control.Measure
*
@@ -117,10 +126,12 @@ OpenLayers.Control.Measure = OpenLayers.Class(OpenLayers.Control, {
OpenLayers.Control.prototype.EVENT_TYPES
);
OpenLayers.Control.prototype.initialize.apply(this, [options]);
this.callbacks = OpenLayers.Util.extend(
{done: this.measureComplete, point: this.measurePartial},
this.callbacks
);
var callbacks = {done: this.measureComplete,
point: this.measurePartial};
if (this.immediate){
callbacks.modify = this.measureImmediate;
}
this.callbacks = OpenLayers.Util.extend(callbacks, this.callbacks);
// let the handler options override, so old code that passes 'persist'
// directly to the handler does not need an update
@@ -147,6 +158,20 @@ OpenLayers.Control.Measure = OpenLayers.Class(OpenLayers.Control, {
this.cancelDelay();
this.handler.cancel();
},
/**
* APIMethod: setImmediate
* Set <persist> is true, the temporary
* sketch will be erased.
*/
setImmediate: function(immediate) {
this.immediate = immediate;
if (this.immediate){
this.callbacks.modify = this.measureImmediate;
} else {
delete this.callbacks.modify;
}
},
/**
* Method: updateHandler
@@ -205,6 +230,20 @@ OpenLayers.Control.Measure = OpenLayers.Class(OpenLayers.Control, {
}
},
/**
* Method: measureImmediate
* Called each time the measurement sketch is modified.
*
* Parameters: point - {<OpenLayers.Geometry.Point>} The point at the
* mouseposition. feature - {<OpenLayers.Feature.Vector>} The sketch feature.
*/
measureImmediate : function(point, feature) {
if (this.delayedTrigger === null &&
!this.handler.freehandMode(this.handler.evt)) {
this.measure(feature.geometry, "measurepartial");
}
},
/**
* Method: cancelDelay
* Cancels the delay measurement that measurePartial began.