MapWindow 4 - Plugins : MapWindow Discussion Forum
Does anyone know how I can select a shape in a polygon shape file or change the color of 1 polygon in a shapefile? I am trying to change the color of a polygon when I hover over it with the mouse. I have the piece of code working where I determine that I am hovering over a sha
Select shapes or change shape outline color?
Posted by: moliver2000 ()
Date: April 13, 2010 08:45AM

Does anyone know how I can select a shape in a polygon shape file or change the color of 1 polygon in a shapefile?

I am trying to change the color of a polygon when I hover over it with the mouse.
I have the piece of code working where I determine that I am hovering over a shape, I just need to change it's color to show that.

Thanks in advance.

Re: Select shapes or change shape outline color?
Posted by: pmeems ()
Date: April 14, 2010 02:13AM

You need ShapeFillColor

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Re: Select shapes or change shape outline color?
Posted by: Winston ()
Date: April 29, 2011 02:43AM

Please moliver2000,

I have problems on how can I determine that I am hovering over a shape.
Can you show me the code of this part??

Thank you very much!!

Re: Select shapes or change shape outline color?
Posted by: jcw ()
Date: April 29, 2011 05:40PM

Moliver2000,

I am in the same position as Winston. Can you post your code for hovering over a shape?

Thanks.

Re: Select shapes or change shape outline color?
Posted by: danofweaver ()
Date: June 26, 2011 03:08PM

Winston and JCW,

This works for me... 


Dim ProjectedLocation As New Drawing.Point
g_MapWin.View.PixelToProj(ScreenX, ScreenY, ProjectedLocation.X, ProjectedLocation.Y)

Dim testShapefile As New MapWinGIS.Shapefile
testShapefile = oMW.Layers(g_MapWin.Layers.CurrentLayer).GetObject()

Dim CurrentFeatureID As Integer
CurrentFeatureID = testShapefile.PointInShapefile(ProjectedLocation.X, ProjectedLocation.Y)

Which places the feature ID in CurrentFeatureID.

BUT COLOR QUESTION In New Version...

In the plugin I'm developing before upgrade to MW 4.8 (fantastic- congratulations all involved) I could successfully change colors of shapes. Now I get no error but no color change. Please advise.
Sample code below with or without refresh... 

 Private Sub ToolStripButton2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton2.Click

        For x = 0 To oMW.Layers(oMW.Layers.CurrentLayer).Shapes.NumShapes - 1
            oMW.Layers(0).Shapes(x).ShapeFillColor = Color.Blue
            oMW.Layers(oMW.Layers.CurrentLayer).Shapes(x).ShapeLineColor = Color.Red
        Next

        oMW.Refresh()

    End Sub

Re: Select shapes or change shape outline color?
Posted by: pmeems ()
Date: June 27, 2011 01:15AM

Here's a similar post about coloring shapes in the new version of MW:
[www.mapwindow.org]

You need to use categories now.

Hope it helps,

Paul

--
Don't forget to read the new documentation: www.mapwindow.org/documentation/mapwingis4.8
Join us Google+: MapWindow GIS Google+ Community
Join the MapWindow Group on LinkedIn! LinkedIn - MapWindow Group

Download the latest beta installer at:
tinyurl.com/mwMonthly 32-Bit
tinyurl.com/mwMonthlyx64 64-Bit
Follow me on Twitter MapWindow_nl to read when a new installer is published.

---
Paul Meems
The Netherlands
[www.bontepaarden.nl]
Release manager, configuration manager and
forum moderator of MapWindow GIS

Owner of MapWindow.nl - Support for
Dutch speaking users: www.mapwindow.nl

*******
Everything I say or write is my personal opinion and
not the opinion of the company I work for.
*******
View my profile on LinkedIn

Re: Select shapes or change shape outline color?
Posted by: danofweaver ()
Date: June 27, 2011 02:23AM

Thanks Paul. I guess this new approach will be covered in documentation. I still don't understand how to change the color of a specific shape to a specific color under the new version. I'll add my query to the thread you've pointed me to (http://www.mapwindow.org/phorum/read.php?3,22779). Thanks for your help. Dan

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