using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using System.ComponentModel;

namespace customcontrol
{
public partial class mapslider : UserControl
{
private mymap map = new mymap();
public ESRI.ArcGIS.Map Map
{
get
{
return map.Map;
}
set
{
map.Map=value;
if (map.Map != null)
{
Map.ExtentChanged += new EventHandler<ESRI.ArcGIS.ExtentEventArgs>(map_ExtentChanged);
Map.SnapToLevels = true;
((ESRI.ArcGIS.ArcGISTiledMapServiceLayer)Map.Layers[0]).Initialized += new EventHandler<EventArgs>(layer0_initialized);
}

}
}

private void layer0_initialized(object o,EventArgs e)
{
sliderLOD.Maximum = ((ESRI.ArcGIS.ArcGISTiledMapServiceLayer)Map.Layers[0]).TileInfo.Lods.Length - 1;
}

public mapslider()
{
InitializeComponent();
}

private void slider1_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
if (map.Map!=null)
{
Map.ZoomToResolution(((ESRI.ArcGIS.ArcGISTiledMapServiceLayer)Map.Layers[0]).TileInfo.Lods[Convert.ToInt32(e.NewValue)].Resolution);
}
}

private void map_ExtentChanged(object o, ESRI.ArcGIS.ExtentEventArgs e)
{
ESRI.ArcGIS.ArcGISTiledMapServiceLayer layer = Map.Layers[0] as ESRI.ArcGIS.ArcGISTiledMapServiceLayer;
int i;
for (i = 0; i < layer.TileInfo.Lods.Length; i++)
{
if (Map.Resolution == layer.TileInfo.Lods[i].Resolution)
break;
}

sliderLOD.Value = i;
}

private void btnzoomin_Click(object sender, RoutedEventArgs e)
{
sliderLOD.Value += 1;
}

private void btnzoomout_Click(object sender, RoutedEventArgs e)
{
sliderLOD.Value -= 1;
}
}

//执行了这个接口后，当在主页面page.xaml.cs中给Map赋值的时候，就能返到set语句中，以便执行绑定事件的代码
public class mymap:INotifyPropertyChanged
{
private ESRI.ArcGIS.Map map;
public ESRI.ArcGIS.Map Map
{
get{return map;}
set
{
map = value;
if (PropertyChanged!=null)
{
PropertyChanged(this, new PropertyChangedEventArgs("Map"));
}
}
}

public event PropertyChangedEventHandler PropertyChanged;

}
}