Add generic 'button' control. r=tschaub. (Closes #872)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@5870 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/Button.js

@@ -0,0 +1,42 @@
+/* Copyright (c) 2006-2007 MetaCarta, Inc., published under a modified BSD license.
+ * See http://svn.openlayers.org/trunk/openlayers/repository-license.txt 
+ * for the full text of the license. */
+
+/**
+ * @requires OpenLayers/Control.js
+ */
+
+/**
+ * Class: OpenLayers.Control.Button 
+ * A very simple button controlfor use with <OpenLayers.Control.Panel>.
+ * When clicked, the function trigger() is executed.
+ * 
+ * Inherits from:
+ *  - <OpenLayers.Control>
+ *
+ * Use:
+ * (code)
+ * var button = new OpenLayers.Control.Button({
+ *     displayClass: "MyButton", trigger: myFunction
+ * });
+ * panel.addControls([button]);
+ * (end)
+ * 
+ * Will create a button with CSS class MyButtonItemInactive, that
+ *     will call the function MyFunction() when clicked.
+ */
+OpenLayers.Control.Button = OpenLayers.Class(OpenLayers.Control, {
+    /**
+     * Property: type
+     * {Integer} OpenLayers.Control.TYPE_BUTTON.
+     */
+    type: OpenLayers.Control.TYPE_BUTTON,
+    
+    /*
+     * Method: trigger
+     * Called by a control panel when the button is clicked.
+     */
+    trigger: function() {},
+
+    CLASS_NAME: "OpenLayers.Control.Button"
+});