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         import net.systemeD.halcyon.WayUI;
   7
   8     public class DragWayNode extends ControllerState {
   9         private var draggingNode:Node;
  10                 private var draggingIndex:int;
  11         private var isDraggingStarted:Boolean = false;
  12                 private var isNew:Boolean = false;
  13
  14         private var downX:Number;
  15         private var downY:Number;
  16                 private var originalLat:Number;
  17                 private var originalLon:Number;
  18                 private var dragstate:uint=NOT_MOVED;
  19                 private const NOT_DRAGGING:uint=0;
  20                 private const NOT_MOVED:uint=1;
  21                 private const DRAGGING:uint=2;
  22
  23                 private var parentWay:Way;
  24                 private var initEvent:MouseEvent;
  25
  26         public function DragWayNode(way:Way, index:int, event:MouseEvent, newNode:Boolean) {
  27                         parentWay=way;
  28                         draggingIndex=index;
  29             downX = event.localX;
  30             downY = event.localY;
  31                         isNew = newNode;
  32                         initEvent=event;
  33                         // the rest of the init will be done during enterState, because we need the controller to be initialised
  34         }
  35
  36         private function addNode(selectedWay:Way,event:MouseEvent):int {
  37                         // find which other ways are under the mouse
  38                         var ways:Array=[]; var w:Way;
  39                         for each (var wayui:WayUI in controller.map.paint.wayuis) {
  40                                 w=wayui.hitTest(event.stageX, event.stageY);
  41                                 if (w && w!=selectedWay) { ways.push(w); }
  42                         }
  43
  44             var lat:Number = controller.map.coord2lat(event.localY);
  45             var lon:Number = controller.map.coord2lon(event.localX);
  46             var undo:CompositeUndoableAction = new CompositeUndoableAction("Insert node");
  47             var node:Node = controller.connection.createNode({}, lat, lon, undo.push);
  48             var index:int = selectedWay.insertNodeAtClosestPosition(node, true, undo.push);
  49                         for each (w in ways) { w.insertNodeAtClosestPosition(node, true, undo.push); }
  50             MainUndoStack.getGlobalStack().addAction(undo);
  51                         return index;
  52         }
  53
  54
  55        override public function processMouseEvent(event:MouseEvent, entity:Entity):ControllerState {
  56
  57             if (event.type==MouseEvent.MOUSE_UP) {
  58                                 if (dragstate==DRAGGING) {
  59                                         // mouse-up while dragging, so end drag
  60                         return new SelectedWayNode(parentWay,draggingIndex);
  61                                 } else if (event.shiftKey && !isNew) {
  62                                         // start new way
  63                                         var way:Way = controller.connection.createWay({}, [entity],
  64                                             MainUndoStack.getGlobalStack().addAction);
  65                                         return new DrawWay(way, true, false);
  66                                 } else if (event.shiftKey && isNew) {
  67                         return new SelectedWayNode(parentWay,draggingIndex);
  68                                 } else {
  69                                         // select node
  70                                         dragstate=NOT_DRAGGING;
  71                         return SelectedWayNode.selectOrEdit(parentWay, draggingIndex);
  72                                 }
  73
  74                         } else if ( event.type == MouseEvent.MOUSE_MOVE) {
  75                                 // dragging
  76                                 if (dragstate==NOT_DRAGGING) {
  77                                         return this;
  78                                 } else if (dragstate==NOT_MOVED && Math.abs(downX - event.localX) < 3 && Math.abs(downY - event.localY) < 3) {
  79                                         return this;
  80                                 }
  81                                 dragstate=DRAGGING;
  82                 return dragTo(event);
  83
  84                         } else {
  85                                 // event not handled
  86                 return this;
  87                         }
  88         }
  89
  90                 override public function processKeyboardEvent(event:KeyboardEvent):ControllerState {
  91                         if (event.keyCode==27) {
  92                                 draggingNode.setLatLon( originalLat, originalLon, MainUndoStack.getGlobalStack().addAction );
  93                 return new SelectedWayNode(parentWay,draggingIndex);
  94                         }
  95                         return this;
  96                 }
  97
  98         private function dragTo(event:MouseEvent):ControllerState {
  99                         draggingNode.setLatLon( controller.map.coord2lat(event.localY),
 100                                     controller.map.coord2lon(event.localX),
 101                                     MainUndoStack.getGlobalStack().addAction );
 102             return this;
 103         }
 104
 105                 public function forceDragStart():void {
 106                         dragstate=NOT_MOVED;
 107                 }
 108
 109                 override public function get selectedWay():Way {
 110                         return parentWay;
 111                 }
 112
 113         override public function enterState():void {
 114                         if (isNew && draggingIndex==-1) { draggingIndex=addNode(parentWay,initEvent); }
 115             draggingNode = parentWay.getNode(draggingIndex);
 116                         originalLat = draggingNode.lat;
 117                         originalLon = draggingNode.lon;
 118
 119                         controller.map.setHighlightOnNodes(parentWay, { selectedway: true } );
 120                         controller.map.setHighlight(draggingNode, { selected: true } );
 121                         Globals.vars.root.addDebug("**** -> "+this);
 122         }
 123         override public function exitState(newState:ControllerState):void {
 124                         controller.map.setHighlightOnNodes(parentWay, { selectedway: false } );
 125                         controller.map.setHighlight(draggingNode, { selected: false } );
 126                         Globals.vars.root.addDebug("**** <- "+this);
 127         }
 128         override public function toString():String {
 129             return "DragWayNode";
 130         }
 131     }
 132 }