OK，今天又有空来写点啦，这个例子自己不想拉的太长了，所以这节多写点东西，我尽量把东西都介绍全面，有不懂的可以留言~
有空大家共同讨论。
好进入正题，如今天标题所示，我们先来看画点，线，圆吧！
/// <summary> /// 绘制界面上的点和线 /// </summary> /// <param name="myMap"></param> /// <param name="point"></param> /// <param name="pointline"></param> public voID DrawAnimationCompleted(Map myMap, List<Graphic> point,ESRI.ArcGIS.ClIEnt.Geometry.PointCollection pointline) { Graphicslayer gPointLayer = new Graphicslayer(); Graphicslayer lineLayer = new Graphicslayer(); Simplelinesymbol linesymbol = new Simplelinesymbol(); linesymbol.color = new SolIDcolorBrush(colors.brown); linesymbol.WIDth = 1; linesymbol.Style = Simplelinesymbol.linestyle.solID; // 画线到图层上并绘制到地图上 GisMap.AddLayersToMap(myMap, new Graphicslayer[] { lineLayer }); Gisline.DrawlineOnMap(pointline, lineLayer, linesymbol); GisMap.DrawAllLayers(myMap, new Graphicslayer[] { gPointLayer }, point); GisMap.AddLayersToMap(myMap, new Graphicslayer[] { gPointLayer }); }
好，看一下如何画圆吧。
/// <summary> /// 在地图上绘制圆 /// </summary> /// <param name="myMap">地图</param> /// <param name="container">绘制容器</param> /// <param name="pt">要绘制的点</param> /// <param name="drawCircleLayer"></param> /// <param name="circleKm">直径</param> /// <param name="color">填充色</param> /// <param name="ellipsestroke">边框色</param> public voID DrawEllipse(Map myMap, Canvas container, MapPoint pt,ref ElementLayer drawCircleLayer, double circleKm,color color,color ellipsestroke) { if (!drawCircleLayer.Children.Contains(container)) { drawCircleLayer.Children.Add(container); container.Opacity = 0.5; container.SetValue(ElementLayer.EnvelopeProperty, new Envelope(myMap.Extent.XMax, myMap.Extent.YMax, myMap.Extent.XMin, myMap.Extent.YMin)); } Point ptFirst = myMap.MapToScreen(new MapPoint(Convert.Todouble(pt.X), Convert.Todouble(pt.Y))); Point pt7 = myMap.MapToScreen(new MapPoint((Convert.Todouble(pt.X) + circleKm * kmToEN), Convert.Todouble(pt.Y))); Ellipse ellipse7 = new Ellipse(); ellipse7.WIDth = (pt7.X - ptFirst.X) * 2; ellipse7.Height = ellipse7.WIDth; ellipse7.strokeThickness = 1; ellipse7.stroke = new SolIDcolorBrush(ellipsestroke); ellipse7.Fill = new SolIDcolorBrush(color); Canvas.Setleft(ellipse7, ptFirst.X - ellipse7.WIDth / 2); Canvas.Settop(ellipse7, ptFirst.Y - ellipse7.WIDth / 2); ellipse7.Opacity = 0.5; container.Children.Add(ellipse7); container.IsHitTestVisible = false; container.SetValue(Canvas.ZIndexProperty, -10); }
这是一个画圆的方法，需要地图类，点，Canvas容器,Gis 的地图层ElementLayer和color
我前台是这样调用的
{ GisMap.DeleteLayersToMap(myMap, "WindCircleLayer"); } ElementLayer circleLayer = new ElementLayer(); circleLayer.ID = "WindCircleLayer"; Canvas circleCanvas = new Canvas(); Graphic tipGraphic = sender as Graphic; if (Convert.Todouble(tipGraphic.Attributes["WindCircle7"]) != 0) { color color = new color(); color.A = 255; color.R = 153; color.G = 105; color.B = 192; DrawEllipse(myMap, circleCanvas, new MapPoint(Convert.Todouble(tipGraphic.Attributes["Longitude"]), Convert.Todouble(tipGraphic.Attributes["Latitude"])), ref circleLayer, Convert.Todouble(300), color, colors.Blue); } if (Convert.Todouble(tipGraphic.Attributes["WindCircle10"]) != 0) { color color = new color(); color.A = 255; color.R = 111; color.G = 91; color.B = 171; this.DrawEllipse(myMap, Convert.Todouble(tipGraphic.Attributes["WindCircle10"]), colors.Blue); } GisMap.AddLayersToMap(myMap, new ElementLayer[] { circleLayer }); }
这里的sender是一个Gis元素 Graphic,根据我的WebService 取到的实体后我把这个点加上了Attributes，一系列属性，所以在上面的代码可以看到tipGraphic.Attributes["WindCircle10"],
下面的代码就是在我从WebService取到实体后做添加点的代码:
/// <summary> /// 添加台风点代码 /// 添加鼠标移入、移出事件 /// </summary> /// <param name="model"></param> /// <param name="i"></param> private voID AddPointToGraphic(typhoonModel model, int i, List<Graphic> pointParam) { SimpleMarkerSymbol symbol = new SimpleMarkerSymbol(); color color = new color(); color.A = 255; if (Convert.Todouble(model.WS) <= 17.1) { color.R = 0; color.G = 254; color.B = 223; symbol.color = new SolIDcolorBrush(color); } else if (Convert.Todouble(model.WS) > 17.1 && Convert.Todouble(model.WS) <= 24.4) { color.R = 254; color.G = 243; color.B = 0; symbol.color = new SolIDcolorBrush(color); } else if (Convert.Todouble(model.WS) > 24.4 && Convert.Todouble(model.WS) <= 32.6) { color.R = 254; color.G = 144; color.B = 44; symbol.color = new SolIDcolorBrush(color); } else if (Convert.Todouble(model.WS) > 32.6 && Convert.Todouble(model.WS) <= 41.4) { color.R = 254; color.G = 4; color.B = 4; symbol.color = new SolIDcolorBrush(color); } else if (Convert.Todouble(model.WS) > 41.4 && Convert.Todouble(model.WS) <= 50.9) { color.R = 254; color.G = 58; color.B = 163; symbol.color = new SolIDcolorBrush(color); } else if (Convert.Todouble(model.WS) > 50.9) { color.R = 174; color.G = 0; color.B = 217; symbol.color = new SolIDcolorBrush(color); } symbol.Size = 10; if (i == 0) { symbol.Style = SimpleMarkerSymbol.SimpleMarkerStyle.Square; } else { symbol.Style = SimpleMarkerSymbol.SimpleMarkerStyle.Circle; } pointParam.Add(new Graphic() { Geometry = new MapPoint(model.Longitude, model.Latitude), Symbol = symbol }); pointParam[i].Attributes.Add("typhoonID", model.typhoonID); pointParam[i].Attributes.Add("typhoonNo", model.typhoonNo); pointParam[i].Attributes.Add("typhoonname", model.typhoonname); pointParam[i].Attributes.Add("WindCircle7", model.WindCircle7); pointParam[i].Attributes.Add("WindCircle10", model.WindCircle10); pointParam[i].Attributes.Add("WS", model.WS); pointParam[i].Attributes.Add("Pressure", model.Pressure); pointParam[i].Attributes.Add("IssueTime", model.IssueTime); pointParam[i].Attributes.Add("Future", model.Future); pointParam[i].Attributes.Add("Latitude", model.Latitude); pointParam[i].Attributes.Add("Longitude", model.Longitude); }
信息提示功能如图:
我们先看下Xmal中的代码:
<Canvas x:name="typhoonPointInfoCanvas" Visibility="Visible" Height="188" HorizontalAlignment="left" margin="0,-272,0" VerticalAlignment="top" WIDth="360"> <Path Stretch="Fill" stroke="Black" Height="168.5" WIDth="328.5" UseLayoutRounding="False" Canvas.left="0.5" Canvas.top="-0.5" Data="M113,25 C113,11.745166 123.74516,1.0000004 137,1.0000004 L304,1.0000004 C317.25482,1.0000004 328,11.745166 328,25 L328,144 C328,157.25484 317.25482,168 304,168 L137,168 C123.74516,168 113,157.25484 113,144 z M112.5,24.499998 L0.5,0.5 L112.5,72.499992 z" Fill="{StaticResource CommonGradIEnt2}"/> <StackPanel OrIEntation="Vertical" Height="168" WIDth="176" Canvas.left="137" Canvas.top="15"> <TextBlock x:name="typhoonnameTextBlock" Height="20" Text="名称:" Foreground="White" textwrapPing="Wrap"/> <TextBlock x:name="typhoonCollectionTimeTextBlock" Height="20" Text="时间:" Foreground="White" textwrapPing="Wrap" d:LayoutOverrIDes="HorizontalAlignment"/> <TextBlock x:name="typhoonpositionTextBlock" Height="20" Text="位置:" Foreground="White" textwrapPing="Wrap" d:LayoutOverrIDes="HorizontalAlignment"/> <TextBlock x:name="typhoonWSTextBlock" Height="20" Text="最大风速:" Foreground="White" textwrapPing="Wrap" d:LayoutOverrIDes="HorizontalAlignment"/> <TextBlock x:name="typhoonPressureTextBlock" Height="20" Text="中心气压:" Foreground="White" textwrapPing="Wrap" d:LayoutOverrIDes="HorizontalAlignment"/> <TextBlock x:name="typhoonCircle7TextBlock" Height="20" Text="7级风圈半径:" Foreground="White" textwrapPing="Wrap" d:LayoutOverrIDes="HorizontalAlignment"/> <TextBlock x:name="typhoonCircle10TextBlock" Height="20" Text="10级风圈半径:" Foreground="White" textwrapPing="Wrap" d:LayoutOverrIDes="HorizontalAlignment"/> </StackPanel> </Canvas>
<linearGradIEntBrush x:Key="CommonGradIEnt" StartPoint="0.5,0" EndPoint="0.5,1"> <GradIEntStop Offset="0" color="#ee76a8d3"/> <GradIEntStop Offset="0.25" color="#ee5b8cb5"/> <GradIEntStop Offset="0.75" color="#ee4b7ba7"/> </linearGradIEntBrush
看下c# 中的代码:
当我们添加那些点也就是 Graphic 的时候有这样一个事件MouseEventHandler
// 添加点和线，先显示点层，动画结束后显示线层 mapDraw.DrawlineAndPoint(ref point, myMap, gLayer, ref pointline, e, length); // 添加点事件 foreach (Graphic item in point) { item.MouseEnter += new MouseEventHandler(MainPage_MouseEnter); item.MouseLeave += new MouseEventHandler(MainPage_Drawline); }
/// <summary> /// 绘制单条台风动画前的信息 /// </summary> /// <param name="point"></param> /// <param name="myMap"></param> /// <param name="gLayer"></param> /// <param name="pointline"></param> /// <param name="e"></param> /// <param name="length"></param> public voID DrawlineAndPoint(ref List<Graphic> point,Map myMap,Graphicslayer gLayer, ref ESRI.ArcGIS.ClIEnt.Geometry.PointCollection pointline, GettyphoonsCompletedEventArgs e, int length) { #region 添加点代码 point = new List<Graphic>(); for (int i = 0; i < length; i++) { AddPointToGraphic(e.Result[i], i, point); } #endregion // 添加线的代码 pointline = new ESRI.ArcGIS.ClIEnt.Geometry.PointCollection(); AddlinetoMap(e.Result.ToList(), length, pointline); // 显示点层 GisMap.DrawAllLayers(myMap, new Graphicslayer[] { gLayer }, new Graphicslayer[] { gLayer }); }
AddPointToGraphic这个方法就是图片上面的那段代码
<SPAN style="Font-SIZE: 14px"> item.MouseEnter += new MouseEventHandler(MainPage_MouseEnter); </SPAN>
item.MouseLeave += new MouseEventHandler(MainPage_Drawline);
这两段代码就是我们添加鼠标移入和移出事件了，我们看下移入事件:
<div class=cnblogs_Highlighter><PRE class=brush:csharp> voID MainPage_MouseEnter(object sender, MouseEventArgs e) { Graphic graphic = sender as Graphic; Cursor = Cursors.Hand; typhoonPointInfoCanvas.Visibility = Visibility.Visible; Point pt = myMap.MapToScreen(new MapPoint(Convert.Todouble(graphic.Attributes["Longitude"]), Convert.Todouble(graphic.Attributes["Latitude"]))); typhoonPointInfoCanvas.SetValue(GrID.marginProperty, new Thickness(pt.X, pt.Y, 0, 0)); typhoonnameTextBlock.Text = "台风：" + graphic.Attributes["typhoonname"].ToString(); typhoonCollectionTimeTextBlock.Text = "时间：" + graphic.Attributes["IssueTime"].ToString(); typhoonpositionTextBlock.Text = "位置：" + graphic.Attributes["Longitude"].ToString() + "°E," + graphic.Attributes["Latitude"].ToString() + "°N"; typhoonWSTextBlock.Text = "最大风速：" + graphic.Attributes["WS"].ToString() + " m/s"; typhoonPressureTextBlock.Text = "中心气压：" + graphic.Attributes["Pressure"].ToString() + " hPa"; typhoonCircle7TextBlock.Text = "7级风圈半径：" + graphic.Attributes["WindCircle7"].ToString() + " km"; typhoonCircle10TextBlock.Text = "10级风圈半径：" + graphic.Attributes["WindCircle10"].ToString() + " km"; circle.DrawEllipse7And10WindCircle(myMap, sender); selectedGarphic = sender as Graphic; }</PRE> </div>
我们看到在显示信息的同时我们又把圆画了上去<SPAN >DrawEllipse7And10WindCircle()这个函数</SPAN>
GisMap是个静态类，以下是他的代码
/// <summary> /// ArcGis 调用类 /// 动态加载、显示隐藏层数据、加载层上的点等 /// 日期：2010-5-10 /// 作者：AngelSoft /// </summary> public static class GisMap { /// <summary> /// 绘制所有的点到地图上 /// </summary> /// <param name="glayer"></param> /// <param name="cacheGraphic"></param> public static voID DrawSymbol(Graphicslayer glayer, List<Graphic> cacheGraphic) { if (glayer != null) { int graphicCount = cacheGraphic.Count; for (int i = 0; i < graphicCount; i++) { glayer.Graphics.Add(cacheGraphic[i]); } // i } }
/// <summary> /// 加载所有图层上的点 /// 动态绘制 /// 图层和点的对应关系要正确 /// 有几个图层就要有几个点集合 /// </summary> /// <param name="map">ArcGis 地图变量</param> /// <param name="layers">GraphicLayer 层数组</param> /// <param name="graphicParam">Graphic 点数组</param> public static voID DrawLayers(Map map, Graphicslayer[] layers, params List<Graphic>[] graphicParam) { // 计算要绘制的层数并一层一层的绘制(调用动态绘制方法) if (layers != null) { int length = layers.Length; for (int i = 0; i < length; i++) { if (layers[i] == null) { layers[i] = new Graphicslayer(); } DynamicDrawSymbol(layers[i], graphicParam[i], map); } } } /// <summary> /// 加载所有图层上的点 /// 画所有点 /// 图层和点的对应关系要正确 /// 有几个图层就要有几个点集合 /// </summary> /// <param name="map">ArcGis 地图变量</param> /// <param name="layers">GraphicLayer 层数组</param> /// <param name="graphicParam">Graphic 点数组</param> public static voID DrawAllLayers(Map map, params List<Graphic>[] graphicParam) { // 计算要绘制的层数并一层一层的绘制(调用动态绘制方法) if (layers != null) { int length = layers.Length; for (int i = 0; i < length; i++) { if (layers[i] == null) { layers[i] = new Graphicslayer(); } DrawAllGraphics(layers[i], graphicParam[i]); } } } /// <summary> /// 隐藏或显示 ArcGis 层 /// </summary> /// <param name="show">隐藏或显示</param> /// <param name="layers">层</param> public static voID LayersVisibility(bool show, params Graphicslayer[] layers) { if (layers != null) { foreach (Graphicslayer item in layers) { item.Visible = show; } } } /// <summary> /// 将图层数组全部从 map 中移除 /// </summary> /// <param name="map">表示一张 ArcGis 地图</param> /// <param name="layers">表示地图层的数组</param> public static voID DeleteLayersToMap(Map map, Graphicslayer[] layers) { // 逐个将数据移除 foreach (Graphicslayer item in layers) { map.Layers.Remove(item); } } /// <summary> /// 根据 ID 号删除某层 /// </summary> /// <param name="map"></param> /// <param name="ID"></param> /// <returns></returns> public static voID DeleteLayersToMap(Map map, string[] ID) { int length = ID.Length; for (int i = 0; i < length; i++) { foreach (Layer item in map.Layers) { if (item.ID == ID[i]) { map.Layers.Remove(item); length--; break; } } } } /// <summary> /// 将图层数组全部从 map 中移除 /// </summary> /// <param name="map">表示一张 ArcGis 地图</param> /// <param name="layers">表示地图层的数组</param> public static voID DeleteLayersToMap(Map map, ElementLayer[] layers) { // 逐个将数据移除 foreach (ElementLayer item in layers) { map.Layers.Remove(item); } } /// <summary> /// 删除地图上的某一层 /// </summary> /// <param name="myMap"></param> /// <param name="ID">ID号</param> public static voID DeleteLayersToMap(Map myMap, string ID) { int layers = myMap.Layers.Count; for (int i = 0; i < layers; i++) { if (myMap.Layers[i].ID == ID) { myMap.Layers.RemoveAt(i); return; } } } public static bool LayerExist(Map myMap, string ID) { int layers = myMap.Layers.Count; for (int i = 0; i < layers; i++) { if (myMap.Layers[i].ID == ID) { return true; } } return false; } /// <summary> /// 将图层数组全部添加到 map 中 /// </summary> /// <param name="map">表示一张 ArcGis 地图</param> /// <param name="layers">表示地图层的数组</param> public static voID AddLayersToMap(Map map, Graphicslayer[] layers) { // 逐个将数据添加到当前地图中 foreach (Graphicslayer item in layers) { if (item != null) { map.Layers.Add(item); } } } /// <summary> /// 将图层数组全部添加到 map 中 /// </summary> /// <param name="map">表示一张 ArcGis 地图</param> /// <param name="layers">表示地图层的数组</param> public static voID AddLayersToMap(Map map, ElementLayer[] layers) { // 逐个将数据添加到当前地图中 foreach (ElementLayer item in layers) { map.Layers.Add(item); } } /// <summary> /// 绘制所有的点到地图上 /// </summary> /// <param name="eLayer"></param> /// <param name="image"></param> public static voID AddImagetoElementLayer(ElementLayer eLayer, List<Image> image) { if (eLayer != null) { foreach (Image item in image) { eLayer.Children.Add(item); } } } /// <summary> /// 隐藏或显示 ArcGis 层 /// </summary> /// <param name="show">隐藏或显示</param> /// <param name="layers">层</param> public static voID LayersVisibility(bool show, params ElementLayer[] layers) { if (layers != null) { foreach (ElementLayer item in layers) { item.Visible = show; } } } /// <summary> /// 动态加载图层 /// 使用 ElementLayer 层 /// </summary> /// <param name="eLayer"></param> /// <param name="cacheGraphic"></param> /// <param name="map"></param> public static voID DynamicDrawElementLayer(ElementLayer eLayer, List<UIElement> cacheElement, Map map) { // 以下四个变量分别表示地图的四个边 // 即最大经纬度和最小经纬度 // xMax最大经度,yMax最大纬度 double xMax = map.Extent.XMax + 2; double xMin = map.Extent.XMin - 2; double yMax = map.Extent.YMax + 2; double yMin = map.Extent.YMin - 2; // 去除不在坐标范围内的点,先检查图层是否为空 if (eLayer != null) { int graphicCount = eLayer.Children.Count; for (int i = 0; i < graphicCount; i++) { UIElement element = eLayer.Children[i]; // 判断经度,纬度 if (!(((element.GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.XMax < xMax && (element.GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.XMax > xMin) && ((element.GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.YMax < yMax && (element.GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.YMax > yMin))) { // 将点在地图上移除,并放在缓存中 cacheElement.Add(eLayer.Children[i]); eLayer.Children.Remove(eLayer.Children[i]); graphicCount--; // 当从集合中移除元素时应该把 graphicCount 减1 i--; // 元素被移除后相当于当前元素的后一位元素会 -1,应该再循环一次本次循环所以应该 -1 } } // i } // 检查缓存是否为空,并将点绘制到图形上 if (cacheElement != null) { int count = cacheElement.Count; for (int i = 0; i < count; i++) { // 判断经度,纬度 if (((cacheElement[i].GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.XMax < xMax && (cacheElement[i].GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.XMax > xMin) && ((cacheElement[i].GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.YMax < yMax && (cacheElement[i].GetValue(ElementLayer.EnvelopeProperty) as Envelope).Extent.YMax > yMin)) { // 运行到此则该点在目前地图范围内,将该点加入到地图中 eLayer.Children.Add(cacheElement[i]); cacheElement.Remove(cacheElement[i]); count--; // 当从集合中移除元素时应该把 count 减1 i--; // 元素被移除后相当于当前元素的后一位元素会 -1,应该再循环一次本次循环所以应该 -1 continue; } } } } /// <summary> /// 将所有元素画到地图上 /// </summary> /// <param name="eLayer"></param> /// <param name="cacheElement"></param> public static voID DrawAllUIElement(ElementLayer eLayer, List<UIElement> cacheElement) { if (eLayer != null) { foreach (UIElement item in cacheElement) { eLayer.Children.Add(item); } } } /// <summary> /// 动态的绘制图层 /// 当然地图移动到相应的坐标后绘制(保留原来的点,绘制新的数据) /// 实现了无刷新绘制 /// </summary> /// <param name="glayer">表示地图上的层</param> /// <param name="cacheGraphic">存放 Graphics 的缓存</param> /// <param name="map">表示一张 ArcGis 地图</param> private static voID DynamicDrawSymbol(Graphicslayer glayer, List<Graphic> cacheGraphic,先检查图层是否为空 if (glayer != null) { int graphicCount = glayer.Graphics.Count; for (int i = 0; i < graphicCount; i++) { // 判断经度,纬度 if (!((glayer.Graphics[i].Geometry.Extent.XMax < xMax && glayer.Graphics[i].Geometry.Extent.XMax > xMin) && (glayer.Graphics[i].Geometry.Extent.YMax < yMax && glayer.Graphics[i].Geometry.Extent.YMax > yMin))) { // 将点在地图上移除,并放在缓存中 cacheGraphic.Add(glayer.Graphics[i]); glayer.Graphics.Remove(glayer.Graphics[i]); graphicCount--; // 当从集合中移除元素时应该把 graphicCount 减1 i--; // 元素被移除后相当于当前元素的后一位元素会 -1,并将点绘制到图形上 if (cacheGraphic != null) { int count = cacheGraphic.Count; for (int i = 0; i < count; i++) { // 判断经度,纬度 if ((cacheGraphic[i].Geometry.Extent.XMax < xMax && cacheGraphic[i].Geometry.Extent.XMax > xMin) && (cacheGraphic[i].Geometry.Extent.YMax < yMax && cacheGraphic[i].Geometry.Extent.YMax > yMin)) { // 运行到此则该点在目前地图范围内,将该点加入到地图中 glayer.Graphics.Add(cacheGraphic[i]); cacheGraphic.Remove(cacheGraphic[i]); count--; // 当从集合中移除元素时应该把 count 减1 i--; // 元素被移除后相当于当前元素的后一位元素会 -1,应该再循环一次本次循环所以应该 -1 continue; } } } } /// <summary> /// 将所有元素画到地图上 /// </summary> /// <param name="eLayer"></param> /// <param name="cacheElement"></param> private static voID DrawAllGraphics(Graphicslayer eLayer, List<Graphic> cacheGraphic) { if (eLayer != null) { foreach (Graphic item in cacheGraphic) { eLayer.Graphics.Add(item); } } }
今天把 GisMap 这个类都写出来了也为了我写下一篇文章做准备吧！后面会写一篇动态加载数据点的文章！因为当大批量点(2000)左右加载到地图上的时候，
就会非常的卡，基本都动不了，所以我们要动态去加载这些点。
总结以上是内存溢出为你收集整理的ArcGis For Silverlight API,地图显示Gis,绘制点，线，绘制图等(三)--绘制点、线、圆，显示提示信息全部内容，希望文章能够帮你解决ArcGis For Silverlight API,地图显示Gis,绘制点，线，绘制图等(三)--绘制点、线、圆，显示提示信息所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）