Winform mouse ZedGraph focal position is provided to draw the crosshair reticle disappear when the mouse out

Scenes

Winforn ZedGraph set the properties of the graph, the axis attributes Scale Properties:

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100112573

Get latest coordinates of points on the curve and the curve when the mouse passes near the curve, and thus the ordinate represents a cross.

effect

 

 

Note:

Blog home page:
https://blog.csdn.net/badao_liumang_qizhi
public concern number of
programs overbearing ape
acquisition-related programming e-books, tutorials and push for free download.

achieve

Binding mouse motion events

zgc.MouseMove += zgc_MouseMove;

 

Zgc which is ZedGraphControl zgc

 

Private  static  void zgc_MouseMove ( Object SENDER, The MouseEventArgs E) 
        { 
            the using (Graphics GC = Global.zedGraphControl1.CreateGraphics ())
             the using (PEN = Pen new new Pen (Color.green)) 
            { 
                // set the brush width 
                pen.Width = . 1 ; 
                pen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDot; 
                RectangleF RECT = Global.zedGraphControl1.GraphPane.Chart.Rect;
                 // make sure the drawing area 
                IF  (rect.Contains (e.Location))
                {
                    Global.zedGraphControl1.Refresh (); 
                    // draw a vertical line 
                    gc.DrawLine (PEN, eX, rect.top, eX, rect.bottom);
                     // draw a horizontal line 
                    gc.DrawLine (pen, rect.Left, eY, rect .right, eY); 


                } 
            } 
        }

 

Note:

Global.zedGraphControl1 is zedGraphControl target global domain.

After this move will produce crosshair with the mouse, but when they leave pane how to draw a good cross hairs removed.

Bind it to remove the mouse event

zgc.MouseLeave += zgc_MouseLeave;

 

Implementation

 

Private  static  void zgc_MouseLeave ( Object SENDER, EventArgs E) 
        { 
            the using (Graphics GC = Global.zedGraphControl1.CreateGraphics ())
             the using (PEN = Pen new new Pen (Color.green)) 
            { 
                // set the brush width 
                pen.Width = . 1 ; 
                pen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDot; 
                RectangleF RECT = Global.zedGraphControl1.GraphPane.Chart.Rect;
                 // make sure the drawing area,
                Global.zedGraphControl1.Refresh ();
                 // draw a vertical line 
                gc.DrawLine (PEN, 0 , 0 , 0 , 0 );
                 // draw a horizontal line 
                gc.DrawLine (PEN, 0 , 0 , 0 , 0 ); 
            } 
        }

 

Here is the method adopted by way of a line drawn from the origin make it disappear.