selection clear event

kity @ df7b361a

-Subproject commit 7c0498012df602619a38e6b88785a486cd92396d
+Subproject commit df7b361ae5098710eca0fec1080dce4bc822bf24

src/adapter/hand.js

@@ -66,6 +66,12 @@ KM.registerUI( 'hand zoom-in zoom-out',
                     e.stopPropagation();
                 }
             } );
+            me.on('keyup', function(e) {
+                if(e.keyCode == keymap.Space && me.getSelectedNodes().length == 0) {
+                    $btn.click();
+                    e.preventDefault();
+                }
+            });
             kity.extendClass( kity.Paper, kity.Draggable );
             break;
         case 'zoom-in':

src/core/minder.select.js

@@ -26,6 +26,7 @@ kity.extendClass( Minder, function () {
                 unhighlightNode( me, n );
             } );
             this._selectedNodes = [];
+            return this.fire( 'selectionclear' );
         },
         removeSelectedNodes: function ( nodes ) {
             var me = this;