【GMap】GMap.Net开发之自定义Marker使用方法-Net-Marker

欢迎您访问我爱IT技术网，今天小编为你分享的编程技术是：【GMap.Net开发之自定义Marker使用方法】，下面是详细的讲解！

GMap.Net开发之自定义Marker使用方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using GMap.NET;
using GMap.NET.WindowsForms;
using GMap.NET.MapProviders;
using GMap.NET.WindowsForms.Markers;

namespace GMapWinFormDemo
{
    public partial class MainForm : Form
    {
        private GMapOverlay objects=new GMapOverlay("objects"); //放置marker的图层
        private GMapMarkerImage currentMarker;
        private bool isLeftButtonDown=false;

        private Timer blinkTimer=new Timer();

        public MainForm()
        {
            InitializeComponent();

            try
            {
                System.Net.IPHostEntry e=System.Net.Dns.GetHostEntry("www.google.com.hk");
            }
            catch
            {
                mapControl.Manager.Mode=AccessMode.CacheOnly;
                MessageBox.Show("No internet connection avaible, going to CacheOnly mode.", "GMap.NET Demo", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }

            mapControl.CacheLocation=Environment.CurrentDirectory + "\\GMapCache\\"; //缓存位置
            mapControl.MapProvider=GMapProviders.GoogleChinaMap; //google china 地图
            mapControl.MinZoom=2;  //最小比例
            mapControl.MaxZoom=17; //最大比例
            mapControl.Zoom=5;     //当前比例
            mapControl.ShowCenter=false; //不显示中心十字点
            mapControl.DragButton=System.Windows.Forms.MouseButtons.Left; //左键拖拽地图
            mapControl.Position=new PointLatLng(32.064,118.704); //地图中心位置：南京

            mapControl.OnMapZoomChanged +=new MapZoomChanged(mapControl_OnMapZoomChanged);
            mapControl.MouseClick +=new MouseEventHandler(mapControl_MouseClick);
            mapControl.MouseDown +=new MouseEventHandler(mapControl_MouseDown);
            mapControl.MouseUp +=new MouseEventHandler(mapControl_MouseUp);
            mapControl.MouseMove +=new MouseEventHandler(mapControl_MouseMove);

            mapControl.OnMarkerClick +=new MarkerClick(mapControl_OnMarkerClick);
            mapControl.OnMarkerEnter +=new MarkerEnter(mapControl_OnMarkerEnter);
            mapControl.OnMarkerLeave +=new MarkerLeave(mapControl_OnMarkerLeave);

            mapControl.Overlays.Add(objects);
        }

        void mapControl_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button==System.Windows.Forms.MouseButtons.Left && isLeftButtonDown)
            {
                if (currentMarker !=null)
                {
                    PointLatLng point=mapControl.FromLocalToLatLng(e.X, e.Y);
                    currentMarker.Position=point;
                    currentMarker.ToolTipText=string.Format("{0},{1}", point.Lat, point.Lng);
                }
            }
        }

        void mapControl_MouseUp(object sender, MouseEventArgs e)
        {
            if (e.Button==System.Windows.Forms.MouseButtons.Left)
            {
                isLeftButtonDown=false;
            }
        }

        void mapControl_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button==System.Windows.Forms.MouseButtons.Left)
            {
                isLeftButtonDown=true;
            }
        }

        void mapControl_OnMarkerLeave(GMapMarker item)
        {
            if (item is GMapMarkerImage)
            {
                currentMarker=null;
                GMapMarkerImage m=item as GMapMarkerImage;
                m.Pen.Dispose();
                m.Pen=null;
            }
        }

        void mapControl_OnMarkerEnter(GMapMarker item)
        {
            if (item is GMapMarkerImage)
            {
                currentMarker=item as GMapMarkerImage;
                currentMarker.Pen=new Pen(Brushes.Red, 2);
            }
        }

        void mapControl_OnMarkerClick(GMapMarker item, MouseEventArgs e)
        {
        }

        void mapControl_MouseClick(object sender, MouseEventArgs e)
        {
            if(e.Button==System.Windows.Forms.MouseButtons.Right)
            {
                //objects.Markers.Clear();
                PointLatLng point=mapControl.FromLocalToLatLng(e.X,e.Y);
                //GMapMarker marker=new GMarkerGoogle(point, GMarkerGoogleType.green);
                Bitmap bitmap=Bitmap.FromFile("F:\\Projects\\GMapDemo\\GMapDemo\\Image\\A.png") as Bitmap;
                //GMapMarker marker=new GMarkerGoogle(point, bitmap);
                GMapMarker marker=new GMapMarkerImage(point, bitmap);
                marker.ToolTipMode=MarkerTooltipMode.OnMouseOver;
                marker.ToolTipText=string.Format("{0},{1}", point.Lat, point.Lng);
                objects.Markers.Add(marker);
            }
        }

        void mapControl_OnMapZoomChanged()
        {
        }

        private void buttonBeginBlink_Click(object sender, EventArgs e)
        {
            blinkTimer.Interval=1000;
            blinkTimer.Tick +=new EventHandler(blinkTimer_Tick);
            blinkTimer.Start();
        }

        void blinkTimer_Tick(object sender, EventArgs e)
        {
            foreach (GMapMarker m in objects.Markers)
            {
                if (m is GMapMarkerImage)
                {
                    GMapMarkerImage marker=m as GMapMarkerImage;
                    if (marker.OutPen==null)
                        marker.OutPen=new Pen(Brushes.Red, 2);
                    else
                    {
                        marker.OutPen.Dispose();
                        marker.OutPen=null;
                    }
                }
            }
            mapControl.Refresh();
        }

        private void buttonStopBlink_Click(object sender, EventArgs e)
        {
            blinkTimer.Stop();
            foreach (GMapMarker m in objects.Markers)
            {
                if (m is GMapMarkerImage)
                {
                    GMapMarkerImage marker=m as GMapMarkerImage;
                    marker.OutPen.Dispose();
                    marker.OutPen=null;
                }
            }
            mapControl.Refresh();
        }
    }
}

关于GMap.Net开发之自定义Marker使用方法的用户互动如下：

　　相关问题：

　　答： >>详细

　　相关问题：

　　答： >>详细

　　相关问题：

　　答： >>详细