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Adding support for a modify callback in the sketch handlers. This lets controls know about each sketch modification as a sketch is being drawn. Also a bit of a refactor of the sketch handlers to share sketch geometry parts. r=ahocevar (closes #1903)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@8831 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
2009-02-04 22:45:16 +00:00
parent 112debe5f5
commit f4bae0a011
6 changed files with 352 additions and 103 deletions
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55
lib/OpenLayers/Handler/Point.js
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@@ -11,9 +11,11 @@
/**
* Class: OpenLayers.Handler.Point
* Handler to draw a point on the map. Point is displayed on mouse down,
* moves on mouse move, and is finished on mouse up. The handler triggers
* callbacks for 'done' and 'cancel'. Create a new instance with the
* <OpenLayers.Handler.Point> constructor.
* moves on mouse move, and is finished on mouse up. The handler triggers
* callbacks for 'done', 'cancel', and 'modify'. The modify callback is
* called with each change in the sketc and will receive the latest point
* drawn. Create a new instance with the <OpenLayers.Handler.Point>
* constructor.
*
* Inherits from:
* - <OpenLayers.Handler>
@@ -84,19 +86,23 @@ OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
*
* Parameters:
* control - {<OpenLayers.Control>} The control that owns this handler
* callbacks - {Object} An object with a 'done' property whose value is a
* function to be called when the point drawing is finished.
* The callback should expect to recieve a single argument,
* the point geometry. If the callbacks object contains a
* 'cancel' property, this function will be called when the
* handler is deactivated while drawing. The cancel should
* expect to receive a geometry.
* callbacks - {Object} An object with a properties whose values are
* functions. Various callbacks described below.
* options - {Object} An optional object with properties to be set on the
* handler
*
* Named callbacks:
* done - Called when the point drawing is finished. The callback will
* recieve a single argument, the point geometry.
* modify - Called with each move of a vertex with the vertex (point)
* geometry and the sketch feature.
* cancel - Called when the handler is deactivated while drawing. The
* cancel callback will receive a geometry.
*/
initialize: function(control, callbacks, options) {
// TBD: deal with style
this.style = OpenLayers.Util.extend(OpenLayers.Feature.Vector.style['default'], {});
if(!(options && options.layerOptions && options.layerOptions.styleMap)) {
this.style = OpenLayers.Util.extend(OpenLayers.Feature.Vector.style['default'], {});
}
OpenLayers.Handler.prototype.initialize.apply(this, arguments);
},
@@ -231,6 +237,21 @@ OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
return false;
},
/**
* Method: modifyFeature
* Modify the existing geometry given a pixel location.
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} A pixel location on the map.
*/
modifyFeature: function(pixel) {
var lonlat = this.map.getLonLatFromPixel(pixel);
this.point.geometry.x = lonlat.lon;
this.point.geometry.y = lonlat.lat;
this.callback("modify", [this.point.geometry, this.point]);
this.point.geometry.clearBounds();
},
/**
* Method: drawFeature
* Render features on the temporary layer.
@@ -294,10 +315,7 @@ OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
}
this.lastDown = evt.xy;
this.drawing = true;
var lonlat = this.map.getLonLatFromPixel(evt.xy);
this.point.geometry.x = lonlat.lon;
this.point.geometry.y = lonlat.lat;
this.point.geometry.clearBounds();
this.modifyFeature(evt.xy);
this.drawFeature();
return false;
},
@@ -315,10 +333,7 @@ OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
*/
mousemove: function (evt) {
if(this.drawing) {
var lonlat = this.map.getLonLatFromPixel(evt.xy);
this.point.geometry.x = lonlat.lon;
this.point.geometry.y = lonlat.lat;
this.point.geometry.clearBounds();
this.modifyFeature(evt.xy);
this.drawFeature();
}
return true;