c# - OxyPlot Add points after axis drag -

i want add points dynamicall after axis drag, how can figgure out, axis dragged , where? can start point , end point of displayed axes(x)?

using oxyplot; using system; using system.collections.generic; using system.linq; using system.text; using system.windows; using system.windows.controls; using system.windows.data; using system.windows.documents; using system.windows.input; using system.windows.media; using system.windows.media.imaging; using system.windows.navigation; using system.windows.shapes;  namespace wpfapplication15 { /// <summary> /// interaction logic mainwindow.xaml /// </summary> ///  public class dataloading {     public plotmodel plotmodel { get; set; }     oxyplot.axes.linearaxis x;     oxyplot.axes.linearaxis y;     private oxyplot.series.lineseries firstseries;     private oxyplot.series.lineseries secondseries;     public dataloading()     {         plotmodel = new plotmodel();         x = new oxyplot.axes.linearaxis()         {             position = oxyplot.axes.axisposition.bottom,             minimum=-2,             maximum=2         };         y = new oxyplot.axes.linearaxis()         {             position = oxyplot.axes.axisposition.left,             ispanenabled = false         };         firstseries = new oxyplot.series.lineseries();         secondseries = new oxyplot.series.lineseries();         firstload();         secondload();         plotmodel.axes.add(x);         plotmodel.axes.add(y);     }      private void firstload()     {         firstseries.points.add(new datapoint(1, 1));         firstseries.points.add(new datapoint(2, 2));         firstseries.points.add(new datapoint(3, 3));         firstseries.points.add(new datapoint(4, 3));         firstseries.points.add(new datapoint(5, 3));         plotmodel.series.add(firstseries);     }     private void secondload()     {         firstseries.points.add(new datapoint(6, 1));         firstseries.points.add(new datapoint(7, 2));         firstseries.points.add(new datapoint(8, 3));         firstseries.points.add(new datapoint(9, 3));         firstseries.points.add(new datapoint(10, 3));     } } public partial class mainwindow : window {     public mainwindow()     {         initializecomponent();         datacontext= new dataloading();     } } } 

using galasoft.mvvmlight.command; using oxyplot; using system; using system.collections.generic; using system.diagnostics; using system.linq; using system.text; using system.windows; using system.windows.controls; using system.windows.data; using system.windows.documents; using system.windows.input; using system.windows.media; using system.windows.media.imaging; using system.windows.navigation; using system.windows.shapes;  namespace wpfapplication15 { /// <summary> /// interaction logic mainwindow.xaml /// </summary> ///  public class dataloading {     public plotmodel plotmodel { get; set; }     public icommand testcommand { get; set; }     oxyplot.axes.linearaxis x;     oxyplot.axes.linearaxis y;     private oxyplot.series.lineseries firstseries;     private oxyplot.series.lineseries secondseries;     private int =0;     public dataloading()     {         testcommand = new relaycommand(()=>showactualpoints());         plotmodel = new plotmodel();         x = new oxyplot.axes.linearaxis()         {             position = oxyplot.axes.axisposition.bottom,             minimum=1,             maximum=5         };         y = new oxyplot.axes.linearaxis()         {             position = oxyplot.axes.axisposition.left,             ispanenabled = false         };         firstseries = new oxyplot.series.lineseries();         secondseries = new oxyplot.series.lineseries();         firstload();          plotmodel.axes.add(x);         plotmodel.axes.add(y);         oxyplot.wpf.plotview pv = new oxyplot.wpf.plotview();         plotmodel.axes[0].axischanged += (o, e) =>         {             double lastpoint = (from y in firstseries.points select y.x).min();             showactuals(lastpoint);         };     }     public delegate void beginupdate();     public void showactuals(double inputlastpoint)     {          if (inputlastpoint > plotmodel.axes[0].actualminimum)         {             debug.writeline("need load points");             beginupdate bu = new beginupdate(secondload);             iasyncresult result = bu.begininvoke(null,null);         }         else         {             debug.writeline("no need load points");         }     }      private void firstload()     {         firstseries.points.add(new datapoint(1, 1));         firstseries.points.add(new datapoint(2, 2));         firstseries.points.add(new datapoint(3, 3));         firstseries.points.add(new datapoint(4, 3));         firstseries.points.add(new datapoint(5, 3));         plotmodel.series.add(firstseries);     }     private void secondload()     {         random rnd = new random();         firstseries.points.insert(0,new datapoint(--i, rnd.nextdouble()));         system.threading.thread.sleep(1000);         plotmodel.invalidateplot(true);     }     private void showactualpoints()     {         debug.writeline("y:{0}",plotmodel.axes[1].actualmaximum);         debug.writeline("x:{0}", plotmodel.axes[0].actualmaximum);         debug.writeline(plotmodel.series[0].getnearestpoint(new screenpoint(plotmodel.axes[0].actualmaximum, plotmodel.axes[1].actualmaximum), false));     } } public partial class mainwindow : window {     public mainwindow()     {         initializecomponent();         datacontext= new dataloading();     } } }