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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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74
lib/OpenLayers/Handler/Polygon.js
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@@ -30,18 +30,20 @@ OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
* Create a Polygon Handler.
*
* Parameters:
* control - {<OpenLayers.Control>}
* callbacks - {Object} An object with a 'done' property whos value is
* a function to be called when the path drawing is
* finished. The callback should expect to recieve a
* single argument, the polygon geometry.
* If the callbacks object contains a 'point'
* property, this function will be sent each point
* as they are added. 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.
* options - {Object}
* control - {<OpenLayers.Control>} The control that owns this handler
* 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 polygon geometry.
* point - Called as each point is added. Receives the new 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) {
OpenLayers.Handler.Path.prototype.initialize.apply(this, arguments);
@@ -50,15 +52,22 @@ OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
/**
* Method: createFeature
* Add temporary geometries
*
* Parameters:
* pixel - {<OpenLayers.Pixel>} The initial pixel location for the new
* feature.
*/
createFeature: function() {
this.polygon = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Polygon());
this.line = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LinearRing());
this.polygon.geometry.addComponent(this.line.geometry);
createFeature: function(pixel) {
var lonlat = this.control.map.getLonLatFromPixel(pixel);
this.point = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point());
new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat)
);
this.line = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LinearRing([this.point.geometry])
);
this.polygon = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Polygon([this.line.geometry])
);
this.layer.addFeatures([this.polygon, this.point], {silent: true});
},
@@ -71,18 +80,6 @@ OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
this.polygon = null;
},
/**
* Method: modifyFeature
* Modify the existing geometry given the new point
*
*/
modifyFeature: function() {
var index = this.line.geometry.components.length - 2;
this.line.geometry.components[index].x = this.point.geometry.x;
this.line.geometry.components[index].y = this.point.geometry.y;
this.line.geometry.components[index].clearBounds();
},
/**
* Method: drawFeature
* Render geometries on the temporary layer.
@@ -92,6 +89,17 @@ OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
this.layer.drawFeature(this.point, this.style);
},
/**
* Method: getSketch
* Return the sketch feature.
*
* Returns:
* {<OpenLayers.Feature.Vector>}
*/
getSketch: function() {
return this.polygon;
},
/**
* Method: getGeometry
* Return the sketch geometry. If <multi> is true, this will return
@@ -121,9 +129,7 @@ OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
// remove the penultimate point
var index = this.line.geometry.components.length - 2;
this.line.geometry.removeComponent(this.line.geometry.components[index]);
if(this.persist) {
this.destroyPoint();
}
this.removePoint();
this.finalize();
}
return false;