1.主要代码：
var sprite:Sprite = new Sprite();
var columnSys:ColumnSymbol = new ColumnSymbol();
var fieldArr:Array = new Array("绿标总数","黄标总数");
var colorArr:Array = new Array("0x00ff00","0xffff00");
columnSys.Fields = fieldArr;
columnSys.Colors = colorArr;
columnSys.MaxValue = Number(hftjNum);
var gra:Graphic = new Graphic(mpPoint,columnSys,Obj);
2.引用的类ColumnSymbol（主要有二维的圆柱、方柱和三维的圆柱、方柱）：
public class ColumnSymbol extends Symbol
{
private var _fields:Array;
private var _colors:Array;
private var _color:uint = 0x333333;
private var _maxvalue:Number;
private var _columnWidth:Number = 20;
private var _maxheight:Number = 10;
public function ColumnSymbol()
{
super();
}
public function get Fields():Array
{
return this._fields;
}
public function set Fields(value:Array):void
{
this._fields = value;
}
public function get Colors():Array
{
return this._colors;
}
public function set Colors(value:Array):void
{
this._colors = value;
}
public function get Color():uint
{
return this._color;
}
public function set Color(value:uint):void
{
this._color = value;
}
public function get MaxValue():Number
{
return this._maxvalue;
}
public function set MaxValue(value:Number):void
{
this._maxvalue = value;
}
override public function draw(sprite:Sprite, geometry:Geometry, attributes:Object, map:Map):void
{
if (!geometry) return;
if (!(geometry is MapPoint)) return;
var point:MapPoint = (geometry as MapPoint);
sprite.graphics.clear();
removeAllChildren(sprite);
this.drawColumn(sprite,attributes,map,point);
}
private function drawColumn(sprite:Sprite,attributes:Object, map:Map, point:MapPoint):void
{
var h:Number = this._maxheight;
var w:Number = this._fields.length * _columnWidth;
sprite.x = Math.ceil((toScreenX(map,point.x) - w / 2));
sprite.y = Math.ceil((toScreenY(map,point.y) - w / 2));
sprite.width = w;
sprite.height = h + 30;
var columnHeight:Number = 0;
var columnX:Number = 30;
var columnY:Number = 0;
for (var j:uint = 0; j < _fields.length; j++)
{
var val:Number = attributes[_fields[j].toString()];
columnHeight = val * _maxheight / _maxvalue;
columnY = _maxheight - columnHeight + 5;
var color:uint = this._colors[j];
sprite.graphics.lineStyle(null,0xffffff);
//画平面柱子
sprite.graphics.beginFill(color);
sprite.graphics.drawRect(columnX,columnY,_columnWidth,columnHeight);
sprite.graphics.endFill();
//增加立体效果
drawColumn3D(sprite,columnX,columnY,_columnWidth,columnHeight,color);
columnX += _columnWidth;
var dy2:Number = _columnWidth * Math.cos(Math.PI/6);
var _textField:TextField = new TextField();
_textField.text = val.toString();
_textField.x = columnX - 10;
_textField.y = columnY - dy2;
_textField.width = 15;
_textField.height = 15;
_textField.visible = true;
var _textFormat:TextFormat = new TextFormat();
_textFormat.size = 10;
_textField.setTextFormat(_textFormat);
sprite.addChild(_textField);
}
}
private function drawColumn3D(sprite:Sprite,x:Number,y:Number,w:Number,h:Number, color:uint):void
{
var dw:Number = w * Math.sin(Math.PI/6);
var dx:Number = w * Math.sin(Math.PI/6);
var dy:Number = w * Math.cos(Math.PI/6);
sprite.graphics.beginFill(color);
sprite.graphics.moveTo(x,y);
sprite.graphics.lineTo(x + dx,y-dy);
sprite.graphics.lineTo(x + dx + w,y - dy);
sprite.graphics.lineTo(x + w,y);
sprite.graphics.lineTo(x,y);
sprite.graphics.endFill();
sprite.graphics.beginFill(color);
sprite.graphics.moveTo(x + w,y);
sprite.graphics.lineTo(x + dx + w,y - dy);
sprite.graphics.lineTo(x + dx + w,y + h - dy);
sprite.graphics.lineTo(x + w,y + h);
sprite.graphics.lineTo(x + w,y);
sprite.graphics.endFill();
}
public function drawCylinde(sprite:Sprite,attributes:Object, map:Map, point:MapPoint):void
{
var gap:Number = 0;
var h:Number = this._maxheight;
var w:Number = this._fields.length * (_columnWidth + gap);
sprite.x = Math.ceil((toScreenX(map,point.x) - w / 2));
sprite.y = Math.ceil((toScreenY(map,point.y) - w / 2));
sprite.width = w;
sprite.height = h;
var columnHeight:Number = 0;
var columnX:Number = gap / 2;
var columnY:Number = 0;
for (var j:uint = 0; j < _fields.length; j++)
{
var val:Number = attributes[_fields[j].toString()];
columnHeight = val * _maxheight / _maxvalue;
columnY = _maxheight - columnHeight;
var color:uint = this._colors[j];
sprite.graphics.lineStyle(null,0xffffff,0);
sprite.graphics.beginFill(color);
sprite.graphics.drawRect(columnX,columnY,_columnWidth,columnHeight);
sprite.graphics.endFill();
drawCylindeU(sprite,columnX,columnY,_columnWidth,columnHeight,color);
columnX += _columnWidth + gap;
}
}
private function drawCylindeUp(sprite:Sprite,x:Number,y:Number,w:Number,h:Number, color:uint):void
{
var dw:Number = w * Math.sin(Math.PI/6);
var dx:Number = w * Math.sin(Math.PI/6);
var dy:Number = w * Math.cos(Math.PI/6);
sprite.graphics.beginFill(color);
sprite.graphics.moveTo(x,y);
sprite.graphics.lineTo(x + dx,y-dy);
sprite.graphics.lineTo(x + dx + w,y - dy);
sprite.graphics.lineTo(x + w,y);
sprite.graphics.lineTo(x,y);
sprite.graphics.endFill();
sprite.graphics.beginFill(color);
sprite.graphics.moveTo(x + w,y);
sprite.graphics.lineTo(x + dx + w,y - dy);
sprite.graphics.lineTo(x + dx + w,y + h - dy);
sprite.graphics.lineTo(x + w,y + h);
sprite.graphics.lineTo(x + w,y);
sprite.graphics.endFill();
}
private function drawCylindeU(sprite:Sprite,x:Number,y:Number,w:Number,h:Number, color:uint):void
{
var dy:Number = w * Math.cos(Math.PI/6);
sprite.graphics.lineStyle(0,0xffffff,0.5);
sprite.graphics.beginFill(color);
sprite.graphics.drawEllipse(x,y - (dy / 2),w, dy);
sprite.graphics.drawEllipse(x,y + h - (dy / 2),w, dy);
sprite.graphics.endFill();
}
private function drawCylindeD(sprite:Sprite,x:Number,y:Number,w:Number,h:Number, color:uint):void
{
var dy:Number = w * Math.cos(Math.PI/6);
y = y + h;
sprite.graphics.lineStyle(0,0xffffff,0.5);
sprite.graphics.beginFill(color);
sprite.graphics.drawEllipse(x,y - (dy / 2),w, dy);
sprite.graphics.endFill();
}
}
flex中通过sprite在地图上画柱状图主要代码