Triton160/Common/DataAnalysisControl/Charting/Command/AddDataSeriesCommand.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Input;
using Aitex.UI.Charting.ViewModel;
using System.Windows;
using Aitex.UI.Charting.Model;
using Abt.Controls.SciChart;

using System.Windows.Media;
using Abt.Controls.SciChart.Model.DataSeries;
using Aitex.UI.Charting.View;
using DataAnalysisControl.Core;

namespace Aitex.UI.Charting.Command
{
    public class AddDataSeriesCommand : ICommand
    {
        public AddDataSeriesCommand(string dataSourceName, string dataSeriesName, string displayName, Color lineColor, float factor, float offset, int lineWidth)
        {
            _dataSourceName = dataSourceName;
            _dataSeriesName = dataSeriesName;
            _displayName = displayName;
            _lineColor = lineColor;
            _factor = factor;
            _offset = offset;
            if (lineWidth < 1) lineWidth = 1;
            _lineWidth = lineWidth;
        }

        string _dataSourceName;
        string _dataSeriesName;
        string _displayName;
        Color _lineColor;
        float _factor;
        float _offset;
        int _lineWidth;

        public bool CanExecute(object parameter)
        {
            return true;
        }

#pragma warning disable 0067
        public event EventHandler CanExecuteChanged;
#pragma warning restore 0067
        private void AsyncShowWarningMessageBox(string message, string title)
        {
            Application.Current.Dispatcher.BeginInvoke(new Action(() => MessageBox.Show(message, title, MessageBoxButton.OK, MessageBoxImage.Warning)));
        }

        public void Execute(object parameter)
        {
            string reason = string.Empty;
            try
            {
                var commonViewModel = (CommonViewModel)parameter;
                //判断新加入数据是否合理
                if (!commonViewModel.DataSources.Keys.Contains(_dataSourceName))
                {
                    reason = string.Format("数据源{0}不存在", _dataSourceName);
                    AsyncShowWarningMessageBox(reason, "警告");
                    return;
                }
                if (!(commonViewModel.DataSources[_dataSourceName].Datas.Keys.Contains(_dataSeriesName)))
                {
                    reason = string.Format("在数据源{0}中，\n不存在数据变量{1}", _dataSourceName, _dataSeriesName);
                    AsyncShowWarningMessageBox(reason, "警告");
                    return;
                }
                foreach (MyLineSeries item in commonViewModel.RenderableSeries)
                {
                    if (item.DataSourceName == commonViewModel.DataSources[_dataSourceName].Title && item.SeriesName == _dataSeriesName)
                    {
                        reason = string.Format("变量{0}已添加", item.SeriesDisplayName);
                        AsyncShowWarningMessageBox(reason, "警告");
                        return;
                    }
                }
                if (commonViewModel.RenderableSeries.Count == 0)//修复第一次加载界面无法实时更新"RenderableSeries"问题
                {
                    commonViewModel.RenderableSeries/*xaml binging object*/.Add(new MyLineSeries("firstLoad", null));
                    foreach (MyLineSeries line in commonViewModel.RenderableSeries)
                    {
                        if (line.SeriesName.Equals("firstLoad"))
                        {
                            commonViewModel.RenderableSeries.Remove(line);
                            break;
                        }
                    }
                }
                //创建DataSeries对象
                var newLineSeries = new MyLineSeries(_dataSeriesName, commonViewModel.DataSources[_dataSourceName]);

                //如果已指定显示名称，则使用指定的显示名称
                //if (!string.IsNullOrEmpty(_displayName)) newLineSeries.DisplayName = _displayName;
                //如果已指定颜色，则使用指定的颜色
                if (_lineColor != Colors.White) newLineSeries.SeriesColor = _lineColor;
                //如果已指定缩放因子，则使用指定的缩放因子
                newLineSeries.Factor = _factor;
                //指定offset
                newLineSeries.Offset = _offset;
                //如果已指定线宽，则使用指定的线宽
                newLineSeries.LineThickness = _lineWidth;

                //更新RenderableSeries
                commonViewModel.RenderableSeries/*xaml binging object*/.Add(newLineSeries);

                //通知Property修改
                commonViewModel.InvokePropertyChanged("RenderableSeries");
            }
            catch (Exception ex)
            {
                reason = ex.Message;
                CONTEXT.WriteLog(ex, string.Format("添加数据源{0}数据{1}发生失败", _dataSourceName, _dataSeriesName));
                AsyncShowWarningMessageBox(reason, "警告");
            }
        }
    }
}