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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
* @requires OpenLayers/Feature/Vector.js
*/
/**
* Class: OpenLayers.Control.DrawFeature
* The DrawFeature control draws point, line or polygon features on a vector
* layer when active.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.DrawFeature = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: layer
* {<OpenLayers.Layer.Vector>}
*/
layer: null,
/**
* Property: callbacks
* {Object} The functions that are sent to the handler for callback
*/
callbacks: null,
/**
* APIProperty: events
* {<OpenLayers.Events>} Events instance for listeners and triggering
* control specific events.
*
* Register a listener for a particular event with the following syntax:
* (code)
* control.events.register(type, obj, listener);
* (end)
*
* Supported event types (in addition to those from <OpenLayers.Control.events>):
* featureadded - Triggered when a feature is added
*/
/**
* APIProperty: multi
* {Boolean} Cast features to multi-part geometries before passing to the
* layer. Default is false.
*/
multi: false,
/**
* APIProperty: featureAdded
* {Function} Called after each feature is added
*/
featureAdded: function() {},
/**
* APIProperty: handlerOptions
* {Object} Used to set non-default properties on the control's handler
*/
/**
* Constructor: OpenLayers.Control.DrawFeature
*
* Parameters:
* layer - {<OpenLayers.Layer.Vector>}
* handler - {<OpenLayers.Handler>}
* options - {Object}
*/
initialize: function(layer, handler, options) {
OpenLayers.Control.prototype.initialize.apply(this, [options]);
this.callbacks = OpenLayers.Util.extend(
{
done: this.drawFeature,
modify: function(vertex, feature) {
this.layer.events.triggerEvent(
"sketchmodified", {vertex: vertex, feature: feature}
);
},
create: function(vertex, feature) {
this.layer.events.triggerEvent(
"sketchstarted", {vertex: vertex, feature: feature}
);
}
},
this.callbacks
);
this.layer = layer;
this.handlerOptions = this.handlerOptions || {};
this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
this.handlerOptions.layerOptions, {
renderers: layer.renderers, rendererOptions: layer.rendererOptions
}
);
if (!("multi" in this.handlerOptions)) {
this.handlerOptions.multi = this.multi;
}
var sketchStyle = this.layer.styleMap && this.layer.styleMap.styles.temporary;
if(sketchStyle) {
this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
this.handlerOptions.layerOptions,
{styleMap: new OpenLayers.StyleMap({"default": sketchStyle})}
);
}
this.handler = new handler(this, this.callbacks, this.handlerOptions);
},
/**
* Method: drawFeature
*/
drawFeature: function(geometry) {
var feature = new OpenLayers.Feature.Vector(geometry);
var proceed = this.layer.events.triggerEvent(
"sketchcomplete", {feature: feature}
);
if(proceed !== false) {
feature.state = OpenLayers.State.INSERT;
this.layer.addFeatures([feature]);
this.featureAdded(feature);
this.events.triggerEvent("featureadded",{feature : feature});
}
},
/**
* APIMethod: insertXY
* Insert a point in the current sketch given x & y coordinates.
*
* Parameters:
* x - {Number} The x-coordinate of the point.
* y - {Number} The y-coordinate of the point.
*/
insertXY: function(x, y) {
if (this.handler && this.handler.line) {
this.handler.insertXY(x, y);
}
},
/**
* APIMethod: insertDeltaXY
* Insert a point given offsets from the previously inserted point.
*
* Parameters:
* dx - {Number} The x-coordinate offset of the point.
* dy - {Number} The y-coordinate offset of the point.
*/
insertDeltaXY: function(dx, dy) {
if (this.handler && this.handler.line) {
this.handler.insertDeltaXY(dx, dy);
}
},
/**
* APIMethod: insertDirectionLength
* Insert a point in the current sketch given a direction and a length.
*
* Parameters:
* direction - {Number} Degrees clockwise from the positive x-axis.
* length - {Number} Distance from the previously drawn point.
*/
insertDirectionLength: function(direction, length) {
if (this.handler && this.handler.line) {
this.handler.insertDirectionLength(direction, length);
}
},
/**
* APIMethod: insertDeflectionLength
* Insert a point in the current sketch given a deflection and a length.
* The deflection should be degrees clockwise from the previously
* digitized segment.
*
* Parameters:
* deflection - {Number} Degrees clockwise from the previous segment.
* length - {Number} Distance from the previously drawn point.
*/
insertDeflectionLength: function(deflection, length) {
if (this.handler && this.handler.line) {
this.handler.insertDeflectionLength(deflection, length);
}
},
/**
* APIMethod: undo
* Remove the most recently added point in the current sketch geometry.
*
* Returns:
* {Boolean} An edit was undone.
*/
undo: function() {
return this.handler.undo && this.handler.undo();
},
/**
* APIMethod: redo
* Reinsert the most recently removed point resulting from an <undo> call.
* The undo stack is deleted whenever a point is added by other means.
*
* Returns:
* {Boolean} An edit was redone.
*/
redo: function() {
return this.handler.redo && this.handler.redo();
},
/**
* APIMethod: finishSketch
* Finishes the sketch without including the currently drawn point.
* This method can be called to terminate drawing programmatically
* instead of waiting for the user to end the sketch.
*/
finishSketch: function() {
this.handler.finishGeometry();
},
/**
* APIMethod: cancel
* Cancel the current sketch. This removes the current sketch and keeps
* the drawing control active.
*/
cancel: function() {
this.handler.cancel();
},
CLASS_NAME: "OpenLayers.Control.DrawFeature"
});
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