Last round of left click checks added following r769 and r770.

git-svn-id: http://svn.openlayers.org/branches/openlayers/1.0@771 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/PanZoom.js

@@ -111,6 +111,7 @@ OpenLayers.Control.PanZoom.prototype =
      * @param {event} evt
      */
     buttonDown: function (evt) {
+        if (!Event.isLeftClick(evt)) return;
 
         var slide = this.map.getResolution() * this.slideFactor;
         var center = this.map.getCenter();

lib/OpenLayers/Control/PanZoomBar.js

@@ -127,6 +127,7 @@ OpenLayers.Control.PanZoomBar.prototype =
      *           and sets the zoom level appropriately.
      */
     divClick: function (evt) {
+        if (!Event.isLeftClick(evt)) return;
         var y = evt.xy.y;
         var top = Position.page(evt.object)[1];
         var levels = Math.floor((y - top)/this.zoomStopHeight);
@@ -139,6 +140,7 @@ OpenLayers.Control.PanZoomBar.prototype =
      * event listener for clicks on the slider
      */
     zoomBarDown:function(evt) {
+        if (!Event.isLeftClick(evt)) return;
         this.map.events.register("mousemove", this, this.passEventToSlider);
         this.map.events.register("mouseup", this, this.passEventToSlider);
         this.mouseDragStart = evt.xy.copyOf();
@@ -173,6 +175,7 @@ OpenLayers.Control.PanZoomBar.prototype =
      * and switch to it.
      */
     zoomBarUp:function(evt) {
+        if (!Event.isLeftClick(evt)) return;
         if (this.zoomStart) {
             this.div.style.cursor="default";
             this.map.events.remove("mousemove");