Re: [Shapedotnet-development] m_map and Canvas to be public
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Re: [Shapedotnet-development] m_map and Canvas to be public
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From: John C. <jo...@k5...> - 2004-01-18 19:00:09
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Yep, you're right they need to be public. It makes the control
significantly easier to use and to maintain.<br>
<br>
I added the property "MapCanvas" to the control and it returns the
PictureBox that the map is drawn to.<br>
I added the property "MapCollection" to the control and it returns the
Map object of the control.<br>
<br>
So your example will look like this now:<br>
<br>
<big><tt><font size="2"><big>private void <span
class="139190511-18012004"> DrawAtCenter </span>(double ptX, double
ptY)<br>
{<br>
// Center & Draw<br>
mapControl.<b>MapCollection</b>.Center(ptX, ptY);<br>
mapControl.Draw();<br>
// Visualize point<br>
Graphics g;<br>
g = mapControl.<b>MapCanvas</b>.CreateGraphics();<br>
g.CompositingMode = CompositingMode.SourceOver; <br>
g.SmoothingMode = SmoothingMode.HighQuality;<br>
g.TranslateTransform(mapControl.Width /2,mapControl.Height/2);<br>
Point[] curvePoints =<br>
{<br>
new Point( 0, 10),<br>
new Point( 3, 3),<br>
new Point( 10, 0),<br>
new Point( 3, -3),<br>
new Point( 0, -10),<br>
new Point( -3, -3),<br>
new Point( -10, 0),<br>
new Point( -3, 3),<br>
};<br>
// Draw polygon <br>
g.DrawPolygon(new Pen(Color.Black,1), curvePoints);<br>
g.FillPolygon(Brushes.Chartreuse, curvePoints, FillMode.Winding);<br>
g.FillEllipse(Brushes.Red, -2, -2, 4, 4);<br>
g.Dispose();<br>
}</big></font></tt></big><br>
<br>
How's that?<br>
<br>
As for your last request, I added the ability to add a new layer by
passing in a string in beta 1.<br>
<br>
Thanks!<br>
John<br>
<br>
E. Perik wrote:<br>
<blockquote type="cite" cite="mid000001c3ddb3$cc966a40$0a01a8c0@xp">
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<title>Message</title>
<meta content="MSHTML 6.00.2800.1106" name="GENERATOR">
<div><font face="Arial"><font size="2"><span
class="139190511-18012004">Hi John,</span></font></font></div>
<div><font face="Arial"><font size="2"><span
class="139190511-18012004"> </span></font></font></div>
<div><font><font face="Arial"><font size="2">For certain tasks it
needs the m_map and Canvas to be public, see the examples below. <br>
Any intents of changing them to a non-protected status?<span
class="139190511-18012004"> </span></font></font></font></div>
<div> </div>
<div><font><font face="Arial"><font size="2"><span
class="139190511-18012004">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. </span></font></font></font></div>
<div> </div>
<div><font><font face="Arial"><font size="2"><span
class="139190511-18012004">HTH,</span></font></font></font></div>
<div> </div>
<div><font><font face="Arial"><font size="2"><span
class="139190511-18012004">Me. </span></font></font></font></div>
<div> </div>
<blockquote dir="ltr" style="margin-right: 0px;">
<div><font face="Arial"><font size="2"><span
class="139190511-18012004"> //</span><span class="139190511-18012004">
Modified in the control: </span><br>
public System.Windows.Forms.PictureBox <strong>Canvas</strong>;<br>
public Map <strong>m_map</strong>;</font></font></div>
<div> </div>
<div><br>
<font face="Arial" size="2"> // Example to draw upon the canvas<br>
// --> Needs <strong>m_map</strong> and <strong>Canvas</strong>
set to public:<br>
private void <span class="139190511-18012004"> DrawAtCenter </span>(double
ptX, double ptY)<br>
{<br>
// Center & Draw<br>
mapControl.m_map.Center(ptX, ptY);<br>
mapControl.Draw();<br>
// Visualize point<br>
Graphics g;<br>
g = mapControl.Canvas.CreateGraphics();<br>
g.CompositingMode = CompositingMode.SourceOver; <br>
g.SmoothingMode = SmoothingMode.HighQuality;<br>
g.TranslateTransform(mapControl.Width /2,mapControl.Height/2);<br>
Point[] curvePoints =<br>
{<br>
new Point( 0, 10),<br>
new Point( 3, 3),<br>
new Point( 10, 0),<br>
new Point( 3, -3),<br>
new Point( 0, -10),<br>
new Point( -3, -3),<br>
new Point( -10, 0),<br>
new Point( -3, 3),<br>
};<br>
// Draw polygon <br>
g.DrawPolygon(new Pen(Color.Black,1), curvePoints);<br>
g.FillPolygon(Brushes.Chartreuse, curvePoints, FillMode.Winding);<br>
g.FillEllipse(Brushes.Red, -2, -2, 4, 4);<br>
g.Dispose();<br>
}</font></div>
<div> </div>
<div><br>
<font face="Arial" size="2"> // Example for hardcoded zooming<br>
// --> Needs <strong>m_map</strong> and <strong>Canvas</strong>
set to public:<br>
myRect = new GIS.RectangleD();<br>
myPoint1 = new GIS.PointD();<br>
myPoint2 = new GIS.PointD();<br>
myPoint1.X = 3.3;<br>
myPoint1.Y = 53.7;<br>
myPoint2.X = 7.5;<br>
myPoint2.Y = 50.6;<br>
myRect.UL = myPoint1;<br>
myRect.LR = myPoint2;<br>
mapControl.m_map.ZoomArea(myRect);<br>
mapControl.Draw();</font></div>
<div> </div>
<div> </div>
<div> </div>
<div><font face="Arial" size="2"> // <strong>GIS.Map.cs</strong>
--> Add a map without dialog box<br>
[Description("Read file without dialog"), <br>
Browsable( false )]<br>
public void AddLayerFromString(string path_and_name_of_shapefile)<br>
{<br>
this.Cursor = Cursors.AppStarting;<br>
m_map.Add( path_and_name_of_shapefile );<br>
this.Cursor = Cursors.Default; <br>
Draw();<br>
}</font></div>
</blockquote>
<div> </div>
<div><font face="Arial"><font size="2">CalculateExtents is not used
in the AddLayerFromString example above,... this would be something for
the user to decide.<span class="139190511-18012004"> </span></font></font></div>
<div> </div>
<div> </div>
</blockquote>
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