NDBGJK5.0/Kingo.Plugins/Kingo.Plugin.MapView/Commands/ControlMapScaleListCommandClass.cs

using DevExpress.XtraBars;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using KGIS.Framework.Menus;
using KGIS.Framework.Utils;
using System;
using System.Runtime.InteropServices;

namespace Kingo.Plugin.MapView.Commands
{
    public class ControlMapScaleListCommandClass : BaseCommand, ICombox
    {
        private IHookHelper m_hookHelper;
        private EngineEditorClass editor = new EngineEditorClass();
        private BarEditItem _baritem = null;
        private ControlsEditingEditTool editTool = null;
        private double scaleValue = 0;
        public object BarEditItem
        {
            get
            {
                return _baritem;
            }
        }

        public bool IsShowCaption
        {
            get
            {
                return true;
            }
        }
        public override string Caption
        {
            get
            {
                return "比例尺";
            }
        }
        public override bool Enabled
        {
            get
            {
                return true;
            }
        }

        public override void OnClick()
        {

        }

        DevExpress.XtraEditors.Repository.RepositoryItemComboBox comboxEdit = new DevExpress.XtraEditors.Repository.RepositoryItemComboBox();
        public override void OnCreate(object hook)
        {
            try
            {
                if (m_hookHelper == null)
                {
                    m_hookHelper = new HookHelper();
                    m_hookHelper.Hook = hook;
                }
                if (m_hookHelper.Hook is IMapControl2)
                {
                    ((ESRI.ArcGIS.Controls.IMapControlEvents2_Event)m_hookHelper.Hook).OnExtentUpdated += ControlsMapScaleZoomToolCommand_OnExtentUpdated;
                }
                CreateCombox();

            }
            catch (Exception ex)
            {
                LogAPI.Debug("初始化 比例尺 命令时异常，异常信息如下：");
                LogAPI.Debug(ex);
                LogAPI.Debug("初始化 比例尺 命令时异常信息结束");
            }
        }
        private void ControlsMapScaleZoomToolCommand_OnExtentUpdated(object displayTransformation, bool sizeChanged, object newEnvelope)
        {
            if (this.m_hookHelper.ActiveView.FocusMap.SpatialReference == null)
                return;
            try
            {
                #region 防止获取Map的MapScale异常
                int hWnd = GetDesktopWindow().ToInt32();
                IActiveView pAv = m_hookHelper.ActiveView;
                pAv.Activate(hWnd);
                #endregion
                SetComboxText(this.m_hookHelper.ActiveView.FocusMap.MapScale);
            }
            catch (Exception ex)
            {
                LogAPI.Debug(" 执行 ControlsMapScaleZoomToolCommand_OnExtentUpdated 时候失败，异常原因: " + ex + " ; ");
            }
        }
        private void SetComboxText(double scale)
        {
            this._baritem.EditValue = ConvertNumberToMapScale(scale);
        }

        private void CreateCombox()
        {
            comboxEdit.SelectedIndexChanged += ComboxEdit_SelectedIndexChanged;
            comboxEdit.Leave += comboxEdit_Leave;
            comboxEdit.Items.Add("1:250");
            comboxEdit.Items.Add("1:500");
            comboxEdit.Items.Add("1:1000");
            comboxEdit.Items.Add("1:5000");
            comboxEdit.Items.Add("1:10000");
            comboxEdit.Items.Add("1:24000");
            comboxEdit.Items.Add("1:100000");
            comboxEdit.Items.Add("1:250000");
            comboxEdit.Items.Add("1:500000");
            comboxEdit.Items.Add("1:750000");
            comboxEdit.Items.Add("1:1500000");
        }
        private void comboxEdit_Leave(object sender, EventArgs e)
        {
            if ((sender as DevExpress.XtraEditors.ComboBoxEdit) != null && (sender as DevExpress.XtraEditors.ComboBoxEdit).EditValue != null)
            {
                SetMapScale((sender as DevExpress.XtraEditors.ComboBoxEdit).EditValue.ToString());
            }
        }

        private void SetMapScale(string scale)
        {
            if (string.IsNullOrWhiteSpace(scale))
            {
                return;
            }
            double scaled = 0;
            if (ConvertMapScaleToNumber(scale, out scaled))
            {
                if (scaleValue == scaled)
                {
                    return;
                }
                scaleValue = scaled;
                this.m_hookHelper.ActiveView.FocusMap.MapScale = scaled;
                this.m_hookHelper.ActiveView.Refresh();
            }
        }

        private bool ConvertMapScaleToNumber(string strInput, out double dblResult)
        {
            //1.移除逗号
            string strText = strInput.Replace(",", "");
            //2.移除1:
            if (strText.StartsWith("1:"))
            {
                strText = strText.Remove(0, 2);
            }
            double dblTemp;
            //3.判断是否数字
            if (double.TryParse(strText, out dblTemp))
            {
                if (dblTemp < 0)
                {
                    dblResult = double.NaN;
                    return false;
                }

                //在0和1之间不再四舍五入,但要保留3位精度
                if ((dblTemp < 10) && (dblTemp > 0))
                {
                    dblTemp = 1000 * dblTemp;
                    dblTemp = (double)Math.Round(dblTemp);
                    dblResult = dblTemp / 1000;
                }
                else
                {
                    dblResult = (double)Math.Round(dblTemp);
                }
                return true;
            }
            else
            {
                dblResult = double.NaN;
                return false;
            }
        }

        private string ConvertNumberToMapScale(double num)
        {
            if (num < 0) { return "1:0"; }
            double dblResult;
            //如果在0和10之间不再四舍五入,但要保留3位精度
            if ((num < 10) && (num > 0))
            {
                double dblTemp = 1000 * num;
                dblTemp = (double)Math.Round(dblTemp);
                dblResult = dblTemp / 1000;
            }
            else
            {
                dblResult = (double)Math.Round(num);
            }
            //小数点前每隔三位插入","
            string strResult = dblResult.ToString();
            int pointIndex = strResult.IndexOf(".");
            if (pointIndex < 0) { pointIndex = strResult.Length; }
            if (pointIndex > 3)
            {
                for (int i = pointIndex; i > 3; i = i - 3)
                {
                    strResult = strResult.Insert(i - 3, ",");
                }
            }

            return "1:" + strResult;
        }
        private void ComboxEdit_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                if (this._baritem.EditValue != null)
                {
                    SetMapScale(this._baritem.EditValue.ToString());
                }
            }
            catch (Exception ex)
            {
                //LogAPI.Debug("图层切换时工具切换失败：" + ex.Message);

                LogAPI.Debug("比例尺 切换失败，异常信息如下：");
                LogAPI.Debug(ex);
                LogAPI.Debug("比例尺 切换失败异常信息结束");
            }
        }

        public void SetBarEditItem(object barItem)
        {
            if (barItem is BarEditItem)
            {
                _baritem = barItem as BarEditItem;
                comboxEdit.AutoHeight = true;
                comboxEdit.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.DisableTextEditor;
                comboxEdit.DropDownRows = 20;
                comboxEdit.SelectedIndexChanged += ComboxEdit_SelectedIndexChanged;
                _baritem.EditWidth = 120;
                _baritem.Edit = comboxEdit;
            }
        }

        [DllImport("user32.dll", EntryPoint = "GetDesktopWindow")]
        protected static extern IntPtr GetDesktopWindow();
    }

}