net/systemeD/potlatch2/controller/DragPOINode.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 DragPOINode extends ControllerState {
   8         private var isDraggingStarted:Boolean = false;
   9                 private var isNew:Boolean = false;
  10
  11         private var downX:Number;
  12         private var downY:Number;
  13                 private var dragstate:uint=NOT_MOVED;
  14                 private const NOT_DRAGGING:uint=0;
  15                 private const NOT_MOVED:uint=1;
  16                 private const DRAGGING:uint=2;
  17
  18         public function DragPOINode(node:Node, event:MouseEvent, newNode:Boolean) {
  19             selection = [node];
  20             downX = event.localX;
  21             downY = event.localY;
  22                         isNew = newNode;
  23         }
  24
  25        override public function processMouseEvent(event:MouseEvent, entity:Entity):ControllerState {
  26
  27             if (event.type==MouseEvent.MOUSE_UP) {
  28                 return new SelectedPOINode(firstSelected as Node);
  29
  30                         } else if ( event.type == MouseEvent.MOUSE_MOVE) {
  31                                 // dragging
  32                                 if (dragstate==NOT_DRAGGING) {
  33                                         return this;
  34                                 } else if (dragstate==NOT_MOVED && Math.abs(downX - event.localX) < 3 && Math.abs(downY - event.localY) < 3) {
  35                                         return this;
  36                                 }
  37                                 dragstate=DRAGGING;
  38                 return dragTo(event);
  39
  40                         } else {
  41                                 // event not handled
  42                 return this;
  43                         }
  44         }
  45
  46         private function dragTo(event:MouseEvent):ControllerState {
  47             (firstSelected as Node).lat = controller.map.coord2lat(event.localY);
  48             (firstSelected as Node).lon = controller.map.coord2lon(event.localX);
  49             return this;
  50         }
  51
  52                 public function forceDragStart():void {
  53                         dragstate=NOT_MOVED;
  54                 }
  55
  56         override public function enterState():void {
  57             controller.map.setHighlight(firstSelected, { selected: true } );
  58                         Globals.vars.root.addDebug("**** -> "+this);
  59         }
  60         override public function exitState(newState:ControllerState):void {
  61             controller.map.setHighlight(firstSelected, { selected: false } );
  62                         Globals.vars.root.addDebug("**** <- "+this);
  63         }
  64         override public function toString():String {
  65             return "DragPOINode";
  66         }
  67     }
  68 }