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added option to the MouseWheel handler to trigger up/down events only

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when wheel is released. r=elemoine (closes #2345)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@9799 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
ahocevar
2009-11-16 10:38:26 +00:00
parent 33e39a205a
commit ebc5d7c021
4 changed files with 125 additions and 22 deletions
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27
lib/OpenLayers/Control/Navigation.js
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@@ -46,7 +46,14 @@ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {
* APIProperty: zoomWheelEnabled
* {Boolean} Whether the mousewheel should zoom the map
*/
zoomWheelEnabled: true,
zoomWheelEnabled: true,
/**
* Property: mouseWheelOptions
* {Object} Options passed to the MouseWheel control (only useful if
* <zoomWheelEnabled> is set to true)
*/
mouseWheelOptions: null,
/**
* APIProperty: handleRightClicks
@@ -159,7 +166,8 @@ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {
this.zoomBox.draw();
this.handlers.wheel = new OpenLayers.Handler.MouseWheel(
this, {"up" : this.wheelUp,
"down": this.wheelDown} );
"down": this.wheelDown},
this.mouseWheelOptions );
},
/**
@@ -192,8 +200,11 @@ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {
* deltaZ - {Integer}
*/
wheelChange: function(evt, deltaZ) {
var currentZoom = this.map.getZoom();
var newZoom = this.map.getZoom() + deltaZ;
if (!this.map.isValidZoomLevel(newZoom)) {
newZoom = Math.max(newZoom, 0);
newZoom = Math.min(newZoom, this.map.getNumZoomLevels());
if (newZoom === currentZoom) {
return;
}
var size = this.map.getSize();
@@ -213,9 +224,10 @@ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {
*
* Parameters:
* evt - {Event}
* delta - {Integer}
*/
wheelUp: function(evt) {
this.wheelChange(evt, 1);
wheelUp: function(evt, delta) {
this.wheelChange(evt, delta || 1);
},
/**
@@ -224,9 +236,10 @@ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {
*
* Parameters:
* evt - {Event}
* delta - {Integer}
*/
wheelDown: function(evt) {
this.wheelChange(evt, -1);
wheelDown: function(evt, delta) {
this.wheelChange(evt, delta || -1);
},
/**