Software: Apache. PHP/5.5.15 uname -a: Windows NT SVR-DMZ 6.1 build 7600 (Windows Server 2008 R2 Enterprise Edition) i586 SYSTEM Safe-mode: OFF (not secure) C:\dmz\phpMyAdmin\js\openlayers\src\openlayers\lib\OpenLayers\Handler\ drwxrwxrwx | |
| Viewing file: Select action/file-type: /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the Clear BSD license.
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
*/
/**
* Class: OpenLayers.Handler.Feature
* Handler to respond to mouse events related to a drawn feature. Callbacks
* with the following keys will be notified of the following events
* associated with features: click, clickout, over, out, and dblclick.
*
* This handler stops event propagation for mousedown and mouseup if those
* browser events target features that can be selected.
*/
OpenLayers.Handler.Feature = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: EVENTMAP
* {Object} A object mapping the browser events to objects with callback
* keys for in and out.
*/
EVENTMAP: {
'click': {'in': 'click', 'out': 'clickout'},
'mousemove': {'in': 'over', 'out': 'out'},
'dblclick': {'in': 'dblclick', 'out': null},
'mousedown': {'in': null, 'out': null},
'mouseup': {'in': null, 'out': null}
},
/**
* Property: feature
* {<OpenLayers.Feature.Vector>} The last feature that was hovered.
*/
feature: null,
/**
* Property: lastFeature
* {<OpenLayers.Feature.Vector>} The last feature that was handled.
*/
lastFeature: null,
/**
* Property: down
* {<OpenLayers.Pixel>} The location of the last mousedown.
*/
down: null,
/**
* Property: up
* {<OpenLayers.Pixel>} The location of the last mouseup.
*/
up: null,
/**
* Property: clickTolerance
* {Number} The number of pixels the mouse can move between mousedown
* and mouseup for the event to still be considered a click.
* Dragging the map should not trigger the click and clickout callbacks
* unless the map is moved by less than this tolerance. Defaults to 4.
*/
clickTolerance: 4,
/**
* Property: geometryTypes
* To restrict dragging to a limited set of geometry types, send a list
* of strings corresponding to the geometry class names.
*
* @type Array(String)
*/
geometryTypes: null,
/**
* Property: stopClick
* {Boolean} If stopClick is set to true, handled clicks do not
* propagate to other click listeners. Otherwise, handled clicks
* do propagate. Unhandled clicks always propagate, whatever the
* value of stopClick. Defaults to true.
*/
stopClick: true,
/**
* Property: stopDown
* {Boolean} If stopDown is set to true, handled mousedowns do not
* propagate to other mousedown listeners. Otherwise, handled
* mousedowns do propagate. Unhandled mousedowns always propagate,
* whatever the value of stopDown. Defaults to true.
*/
stopDown: true,
/**
* Property: stopUp
* {Boolean} If stopUp is set to true, handled mouseups do not
* propagate to other mouseup listeners. Otherwise, handled mouseups
* do propagate. Unhandled mouseups always propagate, whatever the
* value of stopUp. Defaults to false.
*/
stopUp: false,
/**
* Constructor: OpenLayers.Handler.Feature
*
* Parameters:
* control - {<OpenLayers.Control>}
* layer - {<OpenLayers.Layer.Vector>}
* callbacks - {Object} An object with a 'over' property whos value is
* a function to be called when the mouse is over a feature. The
* callback should expect to recieve a single argument, the feature.
* options - {Object}
*/
initialize: function(control, layer, callbacks, options) {
OpenLayers.Handler.prototype.initialize.apply(this, [control, callbacks, options]);
this.layer = layer;
},
/**
* Method: mousedown
* Handle mouse down. Stop propagation if a feature is targeted by this
* event (stops map dragging during feature selection).
*
* Parameters:
* evt - {Event}
*/
mousedown: function(evt) {
this.down = evt.xy;
return this.handle(evt) ? !this.stopDown : true;
},
/**
* Method: mouseup
* Handle mouse up. Stop propagation if a feature is targeted by this
* event.
*
* Parameters:
* evt - {Event}
*/
mouseup: function(evt) {
this.up = evt.xy;
return this.handle(evt) ? !this.stopUp : true;
},
/**
* Method: click
* Handle click. Call the "click" callback if click on a feature,
* or the "clickout" callback if click outside any feature.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean}
*/
click: function(evt) {
return this.handle(evt) ? !this.stopClick : true;
},
/**
* Method: mousemove
* Handle mouse moves. Call the "over" callback if moving in to a feature,
* or the "out" callback if moving out of a feature.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean}
*/
mousemove: function(evt) {
if (!this.callbacks['over'] && !this.callbacks['out']) {
return true;
}
this.handle(evt);
return true;
},
/**
* Method: dblclick
* Handle dblclick. Call the "dblclick" callback if dblclick on a feature.
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean}
*/
dblclick: function(evt) {
return !this.handle(evt);
},
/**
* Method: geometryTypeMatches
* Return true if the geometry type of the passed feature matches
* one of the geometry types in the geometryTypes array.
*
* Parameters:
* feature - {<OpenLayers.Vector.Feature>}
*
* Returns:
* {Boolean}
*/
geometryTypeMatches: function(feature) {
return this.geometryTypes == null ||
OpenLayers.Util.indexOf(this.geometryTypes,
feature.geometry.CLASS_NAME) > -1;
},
/**
* Method: handle
*
* Parameters:
* evt - {Event}
*
* Returns:
* {Boolean} The event occurred over a relevant feature.
*/
handle: function(evt) {
if(this.feature && !this.feature.layer) {
// feature has been destroyed
this.feature = null;
}
var type = evt.type;
var handled = false;
var previouslyIn = !!(this.feature); // previously in a feature
var click = (type == "click" || type == "dblclick");
this.feature = this.layer.getFeatureFromEvent(evt);
if(this.feature && !this.feature.layer) {
// feature has been destroyed
this.feature = null;
}
if(this.lastFeature && !this.lastFeature.layer) {
// last feature has been destroyed
this.lastFeature = null;
}
if(this.feature) {
var inNew = (this.feature != this.lastFeature);
if(this.geometryTypeMatches(this.feature)) {
// in to a feature
if(previouslyIn && inNew) {
// out of last feature and in to another
if(this.lastFeature) {
this.triggerCallback(type, 'out', [this.lastFeature]);
}
this.triggerCallback(type, 'in', [this.feature]);
} else if(!previouslyIn || click) {
// in feature for the first time
this.triggerCallback(type, 'in', [this.feature]);
}
this.lastFeature = this.feature;
handled = true;
} else {
// not in to a feature
if(this.lastFeature && (previouslyIn && inNew || click)) {
// out of last feature for the first time
this.triggerCallback(type, 'out', [this.lastFeature]);
}
// next time the mouse goes in a feature whose geometry type
// doesn't match we don't want to call the 'out' callback
// again, so let's set this.feature to null so that
// previouslyIn will evaluate to false the next time
// we enter handle. Yes, a bit hackish...
this.feature = null;
}
} else {
if(this.lastFeature && (previouslyIn || click)) {
this.triggerCallback(type, 'out', [this.lastFeature]);
}
}
return handled;
},
/**
* Method: triggerCallback
* Call the callback keyed in the event map with the supplied arguments.
* For click and clickout, the <clickTolerance> is checked first.
*
* Parameters:
* type - {String}
*/
triggerCallback: function(type, mode, args) {
var key = this.EVENTMAP[type][mode];
if(key) {
if(type == 'click' && this.up && this.down) {
// for click/clickout, only trigger callback if tolerance is met
var dpx = Math.sqrt(
Math.pow(this.up.x - this.down.x, 2) +
Math.pow(this.up.y - this.down.y, 2)
);
if(dpx <= this.clickTolerance) {
this.callback(key, args);
}
} else {
this.callback(key, args);
}
}
},
/**
* Method: activate
* Turn on the handler. Returns false if the handler was already active.
*
* Returns:
* {Boolean}
*/
activate: function() {
var activated = false;
if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
this.moveLayerToTop();
this.map.events.on({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
activated = true;
}
return activated;
},
/**
* Method: deactivate
* Turn off the handler. Returns false if the handler was already active.
*
* Returns:
* {Boolean}
*/
deactivate: function() {
var deactivated = false;
if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
this.moveLayerBack();
this.feature = null;
this.lastFeature = null;
this.down = null;
this.up = null;
this.map.events.un({
"removelayer": this.handleMapEvents,
"changelayer": this.handleMapEvents,
scope: this
});
deactivated = true;
}
return deactivated;
},
/**
* Method handleMapEvents
*
* Parameters:
* evt - {Object}
*/
handleMapEvents: function(evt) {
if (!evt.property || evt.property == "order") {
this.moveLayerToTop();
}
},
/**
* Method: moveLayerToTop
* Moves the layer for this handler to the top, so mouse events can reach
* it.
*/
moveLayerToTop: function() {
var index = Math.max(this.map.Z_INDEX_BASE['Feature'] - 1,
this.layer.getZIndex()) + 1;
this.layer.setZIndex(index);
},
/**
* Method: moveLayerBack
* Moves the layer back to the position determined by the map's layers
* array.
*/
moveLayerBack: function() {
var index = this.layer.getZIndex() - 1;
if (index >= this.map.Z_INDEX_BASE['Feature']) {
this.layer.setZIndex(index);
} else {
this.map.setLayerZIndex(this.layer,
this.map.getLayerIndex(this.layer));
}
},
CLASS_NAME: "OpenLayers.Handler.Feature"
});
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