net/systemeD/potlatch2/controller/DragWayNode.as

   1 package net.systemeD.potlatch2.controller {
   2         import flash.events.*;
   3     import net.systemeD.potlatch2.EditController;
   4     import net.systemeD.halcyon.connection.*;
   5         import net.systemeD.halcyon.Globals;
   6
   7     public class DragWayNode extends ControllerState {
   8         private var selectedWay:Way;
   9         private var draggingNode:Node;
  10         private var isDraggingStarted:Boolean = false;
  11                 private var isNew:Boolean = false;
  12
  13         private var downX:Number;
  14         private var downY:Number;
  15                 private var dragstate:uint=NOT_MOVED;
  16                 private const NOT_DRAGGING:uint=0;
  17                 private const NOT_MOVED:uint=1;
  18                 private const DRAGGING:uint=2;
  19
  20         public function DragWayNode(way:Way, node:Node, event:MouseEvent, newNode:Boolean) {
  21             selectedWay = way;
  22             draggingNode = node;
  23             downX = event.localX;
  24             downY = event.localY;
  25                         isNew = newNode;
  26         }
  27
  28        override public function processMouseEvent(event:MouseEvent, entity:Entity):ControllerState {
  29
  30             if (event.type==MouseEvent.MOUSE_UP) {
  31                                 if (dragstate==DRAGGING) {
  32                                         // mouse-up while dragging, so end drag
  33                         return new SelectedWayNode(selectedWay,draggingNode);
  34 //                      return endDrag();
  35                                 } else if (event.shiftKey && !isNew) {
  36                                         // start new way
  37                                         var way:Way = controller.connection.createWay({}, [entity],
  38                                             MainUndoStack.getGlobalStack().addAction);
  39                                         return new DrawWay(way, true, false);
  40                                 } else if (event.shiftKey && isNew) {
  41                         return new SelectedWayNode(selectedWay,draggingNode);
  42                                 } else {
  43                                         // select node
  44                                         dragstate=NOT_DRAGGING;
  45                         return SelectedWayNode.selectOrEdit(selectedWay, draggingNode);
  46                                 }
  47
  48                         } else if ( event.type == MouseEvent.MOUSE_MOVE) {
  49                                 // dragging
  50                                 if (dragstate==NOT_DRAGGING) {
  51                                         return this;
  52                                 } else if (dragstate==NOT_MOVED && Math.abs(downX - event.localX) < 3 && Math.abs(downY - event.localY) < 3) {
  53                                         return this;
  54                                 }
  55                                 dragstate=DRAGGING;
  56                 return dragTo(event);
  57
  58                         } else {
  59                                 // event not handled
  60                 return this;
  61                         }
  62         }
  63
  64         private function endDrag():ControllerState {
  65             return previousState;
  66         }
  67
  68         private function dragTo(event:MouseEvent):ControllerState {
  69                         draggingNode.setLatLon( controller.map.coord2lat(event.localY), controller.map.coord2lon(event.localX) );
  70             return this;
  71         }
  72
  73                 public function forceDragStart():void {
  74                         dragstate=NOT_MOVED;
  75                 }
  76
  77         override public function enterState():void {
  78             controller.map.setHighlight(selectedWay, { showNodes: true } );
  79                         Globals.vars.root.addDebug("**** -> "+this);
  80         }
  81         override public function exitState():void {
  82             controller.map.setHighlight(selectedWay, { showNodes: false } );
  83                         Globals.vars.root.addDebug("**** <- "+this);
  84         }
  85         override public function toString():String {
  86             return "DragWayNode";
  87         }
  88     }
  89 }