Widgets 整理

1.滑动条

http://www.newnaw.com/pub/sl/031.html

<--!grid中的内容-->

<Grid x:Name="slidergrid" HorizontalAlignment="Left" VerticalAlignment="Center" Background="Azure" Margin="20">
        <StackPanel Orientation="Vertical">
            <Button x:Name="btnzoomin" Content="+" Click="btnzoomin_Click" />
            <Slider x:Name="sliderLOD" Orientation="Vertical"  Height="200" SmallChange="1" LargeChange="1"  Minimum="0" Cursor="Hand" ValueChanged="slider1_ValueChanged" />
            <Button x:Name="btnzoomout" Content="-" Click="btnzoomout_Click" />
        </StackPanel>
    </Grid>

cs文件后台代码

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;

    }
}