c# - WPF coordinate System update -


i created coordinate system on canvas element. draw every got value red point , connect old one.

see here: enter image description here

i'm getting every second 10 values.

1 value = 1 pixel

the red line represent values, i'm getting constant value testing.

my goal update drawing when reaches end of coordinate system. want push drawing left , draw next points.

my goal is:

  • i dont want lose points in graph because later want zoom in , out
  • i dont want slow down system less possible ...

this code not sure how can update graph in ending part....

        static double xold = 32;         static double yold = 580;         static double t = 32;         system.windows.shapes.path path;         static geometrygroup linegroupdrw1 = new geometrygroup();         ....     public void drawpoly(double value)     {              //increase point position             t++;               //generate 2 point connection             point pone = new point(xold, yold);             point ptwo = new point(t, value);              //connect old point new             geometrygroup linegroup = new geometrygroup();             linegeometry connectorgeometry = new linegeometry();             connectorgeometry.startpoint = pone;             connectorgeometry.endpoint = ptwo;             linegroup.children.add(connectorgeometry);             path = new system.windows.shapes.path();             path.data = linegroup;             path.strokethickness = 1;             path.stroke = path.fill = brushes.red;               //fill static linegroup new point             linegroupdrw1.children.add(connectorgeometry);              if (coordinatesystem.width > t)             {                 // draw graph                 coordinatesystem.children.add(path);             }             else              {                 //to : update drawing                 updatedrawingend();             }              //refresh values             xold = t;             yold = value;          }            ....            public void updatedrawingend()          {             path = new system.windows.shapes.path();             path.data = linegroupdrw1;             path.strokethickness = 1;             path.stroke = path.fill = brushes.yellow;              coordinatesystem.children.add(path);             t = 145;         }

just put ui inside scrollviewer. forget trying "move" lines around.

<window x:class="miscsamples.signalgraph"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         title="signalgraph" height="300" width="300">     <scrollviewer verticalscrollbarvisibility="auto"                   horizontalscrollbarvisibility="auto">         <grid x:name="coordinatesystem">          </grid>     </scrollviewer> </window>

code behind (taken code , improved little bit)

 public partial class signalgraph : window     {         private system.threading.timer timer;         private random random = new random();          public signalgraph()         {             initializecomponent();              timer = new system.threading.timer(x => drawrandomline(), null, 0, 100);         }          private void drawrandomline()         {             dispatcher.begininvoke((action) (() => drawpoly(random.next(0,100))), null);         }          static double xold = 32;         static double yold = 580;         static double t = 32;         path path;         static geometrygroup linegroupdrw1 = new geometrygroup();          public void drawpoly(double value)         {             //increase point position             t = t+5;               //generate 2 point connection             var pone = new point(xold, yold);             var ptwo = new point(t, value);              //connect old point new             var linegroup = new geometrygroup();              var connectorgeometry = new linegeometry {startpoint = pone, endpoint = ptwo};              linegroup.children.add(connectorgeometry);             path = new path                        {                            data = linegroup,                             strokethickness = 1,                            stroke = brushes.red,                            fill = brushes.red                        };              //fill static linegroup new point             linegroupdrw1.children.add(connectorgeometry);              //if (coordinatesystem.actualwidth > t)             //{                 // draw graph                 coordinatesystem.children.add(path);             //}             //else              //{             //    //to : update drawing             //    updatedrawingend();             //}              //refresh values             xold = t;             yold = value;          }     }

result:

enter image description here


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