From 334fb4c2edc06f3e7ba9164fa1e6e2b3a9ceb180 Mon Sep 17 00:00:00 2001
From: crschmidt <crschmidt@crschmidt.net>
Date: Sat, 20 May 2006 19:59:50 +0000
Subject: [PATCH] Add start of a KeyboardDefaults class. This works, but
 because Keyboard events apparently always happen on the document level, I
 haven't yet figured out how to have them only happen when you're 'focused' on
 the map, so these are currently off by default. To test them,
 map.addControl(new OpenLayers.Control.KeyboardDefaults()); in your HTML file.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@214 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
---
 lib/OpenLayers.js                          |  1 +
 lib/OpenLayers/Control/KeyboardDefaults.js | 58 ++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 lib/OpenLayers/Control/KeyboardDefaults.js

diff --git a/lib/OpenLayers.js b/lib/OpenLayers.js
index a3a2ce26a9..6d218eb031 100644
--- a/lib/OpenLayers.js
+++ b/lib/OpenLayers.js
@@ -55,6 +55,7 @@ catch(e){
         "OpenLayers/Layer/WFS.js",
         "OpenLayers/Control.js",
         "OpenLayers/Control/MouseDefaults.js",
+        "OpenLayers/Control/KeyboardDefaults.js",
         "OpenLayers/Control/PanZoom.js",
         "OpenLayers/Control/PanZoomBar.js",
         "OpenLayers/Control/LayerSwitcher.js"
diff --git a/lib/OpenLayers/Control/KeyboardDefaults.js b/lib/OpenLayers/Control/KeyboardDefaults.js
new file mode 100644
index 0000000000..c59c32d1ab
--- /dev/null
+++ b/lib/OpenLayers/Control/KeyboardDefaults.js
@@ -0,0 +1,58 @@
+OpenLayers.Control.KeyboardDefaults = Class.create();
+OpenLayers.Control.KeyboardDefaults.prototype = 
+  Object.extend( new OpenLayers.Control(), {
+
+    initialize: function() {
+        OpenLayers.Control.prototype.initialize.apply(this, arguments);
+    },
+    
+    draw: function() {
+        Event.observe(document, 'keypress', this.defaultKeyDown.bind(this.map));
+    },
+    
+    /**
+    * @param {Event} evt
+    */
+    defaultKeyDown: function (evt) {
+        var i = 0;
+        switch(evt.keyCode) {
+            case Event.KEY_LEFT:
+                var resolution = this.getResolution();
+                var center = this.getCenter();
+                this.setCenter(
+                  new OpenLayers.LonLat(center.lon - (resolution * 50), 
+                                        center.lat)
+                                       );
+                Event.stop(evt);
+                break;
+            case Event.KEY_RIGHT: 
+                var resolution = this.getResolution();
+                var center = this.getCenter();
+                this.setCenter(
+                  new OpenLayers.LonLat(center.lon + (resolution * 50),
+                                        center.lat)
+                                       );
+                Event.stop(evt);
+                break;
+            case Event.KEY_UP:
+                var resolution = this.getResolution();
+                var center = this.getCenter();
+                this.setCenter(
+                  new OpenLayers.LonLat(center.lon, 
+                                        center.lat + (resolution * 50))
+                                       );
+                Event.stop(evt);
+                break;
+            case Event.KEY_DOWN:
+                var resolution = this.getResolution();
+                var center = this.getCenter();
+                this.setCenter(
+                  new OpenLayers.LonLat(center.lon, 
+                                        center.lat - (resolution * 50))
+                                       );
+                Event.stop(evt);
+                break;
+        }
+    }
+
+});