基于ArcGIS Flex API实现动态标绘（1.2）

动态标绘API 1.2，相较前一版本号（点击进入），该版本号新增对基本标绘符号的支持，包含：

单点、多点、折线、手绘线、多边形、手绘多边形、矩形，并提供对应的编辑功能。

例如以下图所看到的，对多点的编辑。

下图。用单点表示坦克，多点表示战斗机群。

实例代码例如以下：

private var plotDrawTool:PlotDrawTool;
private var plotEditTool:PlotEditTool;

private var outline:SimpleLineSymbol = new SimpleLineSymbol("solid", 0xff0000, 1, 1);
private var markerOutline:SimpleLineSymbol = new SimpleLineSymbol("dash", 0x000000, 1, 2);
private var tank:PictureMarkerSymbol = new PictureMarkerSymbol("assets/tank.png");
private var plane:PictureMarkerSymbol = new PictureMarkerSymbol("assets/plane.png");
private var markerSymbol:SimpleMarkerSymbol = new SimpleMarkerSymbol("circle", 25, 0xff0000, 1, 0, 0, 0, markerOutline);
private var multiMarkerSymbol:SimpleMarkerSymbol = new SimpleMarkerSymbol("circle", 25, 0x00ff00, 1, 0, 0, 0, markerOutline);
private var lineSymbol:SimpleLineSymbol = new SimpleLineSymbol("dash", 0x0000ff, 1, 2);
private var fillSymbol:SimpleFillSymbol = new SimpleFillSymbol("solid", 0x00ff00, 0.5, outline);

private static const STATE_MOVE_SCALE_ROTATE:int = 0;
private static const STATE_EDIT_CONTROL_POINTS:int = 1;

private var editState:int = 0;
private var activePlot:Graphic;

private function init():void{
	// 实例化绘制工具
	this.plotDrawTool = new PlotDrawTool(map);
	// 监听 DRAW_END事件，绘制结束后可获得plot
	this.plotDrawTool.addEventListener(PlotDrawEvent.DRAW_END, drawEndHandler);
	// 实例化编辑工具
	this.plotEditTool = new PlotEditTool(map);
}

private function drawEndHandler(event:PlotDrawEvent):void{
	// 对plot设置渲染符号
	var geometry:Geometry = event.plotGraphic.geometry;
	if(geometry is Polygon)
		event.plotGraphic.symbol = fillSymbol;
	else if(geometry is Polyline)
		event.plotGraphic.symbol = lineSymbol;
	else if(geometry is MapPoint)
		event.plotGraphic.symbol = tank;
	else if(geometry is Multipoint)
		event.plotGraphic.symbol = plane;
	// 显示
	this.graphicsLayer.add(event.plotGraphic);
	// 设置鼠标单击事件响应
	event.plotGraphic.addEventListener(MouseEvent.CLICK, graphicClickHandler);
}

private function graphicClickHandler(event:MouseEvent):void{
	var graphic:Graphic = event.currentTarget as Graphic;
	if(graphic == this.activePlot){
		if(this.editState == STATE_MOVE_SCALE_ROTATE){
			// 开启 移动+编辑控制点 状态
			this.plotEditTool.activate(PlotEditTool.MOVE|PlotEditTool.EDIT_CONTROL_POINTS, graphic);
			this.editState = STATE_EDIT_CONTROL_POINTS;
		}
		else{
			// 开启 移动+旋转缩放 状态
			this.plotEditTool.activate(PlotEditTool.MOVE|PlotEditTool.SCALE_ROTATE, graphic);
			this.editState = STATE_MOVE_SCALE_ROTATE;
		}
	}
	else{
		this.activePlot = graphic;
		this.plotEditTool.activate(PlotEditTool.MOVE|PlotEditTool.EDIT_CONTROL_POINTS, graphic);
		this.editState = STATE_EDIT_CONTROL_POINTS;
	}
}

演示样例代码下载地址 点击下载

欢迎大家使用、反馈意见。

QQ：21587252  email：gispace@yeah.net

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