RE: [Shapedotnet-development] m_map and Canvas to be public

[E. P. <er...@pe...>]

Hi John,
 
ok, good thinking there :D
 
It seems i overlooked the 'adding layer by string',... think i used in
0.8 or 0.9.
 
BTW, could you post a snippet on handling the stretch/warp as you tried,
but where not satisfied with?
 
Me.
 

-----Original Message-----
From: sha...@li...
[mailto:sha...@li...] On Behalf
Of John Coleman
Sent: zondag 18 januari 2004 20:01
To: sha...@li...
Subject: Re: [Shapedotnet-development] m_map and Canvas to be public


Yep, you're right they need to be public.  It makes the control
significantly easier to use and to maintain.

I added the property "MapCanvas" to the control and it returns the
PictureBox that the map is drawn to.
I added the property "MapCollection" to the control and it returns the
Map object of the control.

So your example will look like this now:

private void  DrawAtCenter (double ptX, double ptY)
 {
  // Center & Draw
  mapControl.MapCollection.Center(ptX, ptY);
  mapControl.Draw();
  // Visualize point
  Graphics g;
  g = mapControl.MapCanvas.CreateGraphics();
  g.CompositingMode = CompositingMode.SourceOver;    
  g.SmoothingMode = SmoothingMode.HighQuality;
  g.TranslateTransform(mapControl.Width /2,mapControl.Height/2);
  Point[] curvePoints =
  {
     new Point( 0,  10),
     new Point( 3,  3),
     new Point( 10,  0),
     new Point( 3,  -3),
     new Point( 0,  -10),
     new Point( -3,  -3),
     new Point( -10,  0),
     new Point( -3,  3),
  };
  // Draw polygon 
  g.DrawPolygon(new Pen(Color.Black,1), curvePoints);
  g.FillPolygon(Brushes.Chartreuse, curvePoints, FillMode.Winding);
  g.FillEllipse(Brushes.Red, -2, -2, 4, 4);
  g.Dispose();
 }

How's that?

As for your last request, I added the ability to add a new layer by
passing in a string in beta 1.

Thanks!
John

E. Perik wrote:


Hi John,
 
For certain tasks it needs the m_map and Canvas to be public, see the
examples below. 
Any intents of changing them to a non-protected status? 
 
Also using an aditional add-layer method (see below),...think this would
be interesting to fit in too. For an application one can add some layers
by default when starting up. 
 
HTH,
 
Me. 
 

 // Modified in the control: 
 public System.Windows.Forms.PictureBox Canvas;
 public Map m_map;
 

 // Example to draw upon the canvas
 // --> Needs m_map and Canvas set to public:
 private void  DrawAtCenter (double ptX, double ptY)
 {
  // Center & Draw
  mapControl.m_map.Center(ptX, ptY);
  mapControl.Draw();
  // Visualize point
  Graphics g;
  g = mapControl.Canvas.CreateGraphics();
  g.CompositingMode = CompositingMode.SourceOver;    
  g.SmoothingMode = SmoothingMode.HighQuality;
  g.TranslateTransform(mapControl.Width /2,mapControl.Height/2);
  Point[] curvePoints =
  {
     new Point( 0,  10),
     new Point( 3,  3),
     new Point( 10,  0),
     new Point( 3,  -3),
     new Point( 0,  -10),
     new Point( -3,  -3),
     new Point( -10,  0),
     new Point( -3,  3),
  };
  // Draw polygon 
  g.DrawPolygon(new Pen(Color.Black,1), curvePoints);
  g.FillPolygon(Brushes.Chartreuse, curvePoints, FillMode.Winding);
  g.FillEllipse(Brushes.Red, -2, -2, 4, 4);
  g.Dispose();
 }
 

 // Example for hardcoded zooming
 // --> Needs m_map and Canvas set to public:
 myRect = new GIS.RectangleD();
 myPoint1 = new GIS.PointD();
 myPoint2 = new GIS.PointD();
 myPoint1.X = 3.3;
 myPoint1.Y = 53.7;
 myPoint2.X = 7.5;
 myPoint2.Y = 50.6;
 myRect.UL = myPoint1;
 myRect.LR = myPoint2;
 mapControl.m_map.ZoomArea(myRect);
 mapControl.Draw();
 
 
 
 // GIS.Map.cs --> Add a map without dialog box
 [Description("Read file without dialog"), 
 Browsable( false )]
 public void AddLayerFromString(string path_and_name_of_shapefile)
 {
   this.Cursor = Cursors.AppStarting;
   m_map.Add( path_and_name_of_shapefile );
   this.Cursor = Cursors.Default;                        
   Draw();
 }

 
CalculateExtents is not used in the AddLayerFromString example above,...
this would be something for the user to decide. 
 
 

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