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Created Unassigned: GrayScale and Negative Modes Issue [16115]

March 4, 2015, 10:05 am
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Hello;

i was trying to enable GrayScale and Negative Modes with a RadioButton, so that in each CheckedChanged Event i can switch between these modes, the issue is that, if we make calls like :

```
Private Sub KRB_EffectGrayScale_CheckedChanged(sender As Object, e As EventArgs) Handles KRB_EffectGrayScale.CheckedChanged

mapControl.GrayScaleMode = True
mapControl.NegativeMode = False

End Sub
```
the GrayScaleMode is some kind of ovverided in the second call to NegativeMode even if set to False, i guess this come from the code that implements these capabilities.

The Solution was to first Disable second mode and then Enable the wanted one like this :
```
mapControl.NegativeMode = False
mapControl.GrayScaleMode = True
```

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New Post: GMap.NET could be creating a Window Handle error? (C#.NET, Windows Forms)

March 9, 2015, 6:42 am
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I have an application with an embedded GMapControl with a bunch of timers. The map is created only once, and there are a bunch of routes and overlays drawn only once in the form constructor.
The only repetitive action happening related to the GMapControl is the hiding and displaying of the routes (they have already been drawn once at load).

Once the application runs continuously for about 8 minutes, 10000 window handlers are created and the application crashes. A win32.exe error is thrown saying "Error creating window handles". Is there perhaps a Dispose() method that needs to be explicitly called for certain controls in GMap.NET? Is there another possibility?
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New Post: HEAT MAP

March 9, 2015, 8:39 am
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It would appear there is a HEAT MAP control based on the GMAP control in CodeProject. It is called GHEAT.Net and you can find it here:
http://www.codeproject.com/Articles/88956/GHeat-NET

The problem is that I am not sure how current this GHEAT is as it looks like the last compile for the DLL was in 2010.

Radioman, is this something you can remedy for us? This would enhance the GMAP capabilities incredibly.
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New Post: HEAT MAP

March 10, 2015, 5:08 am
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I managed to modify the C# source code by adding the modifications to the PointLatLng.cs class.
Then I recompiled the code and produced a DLL I can work with.

Thank you for the Source Code - this has been a great help.
Please ask and I would be happy to share.

The next step now is to use the DLL to create a proper Heat Map. I will let you know how it goes.
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New Post: HEAT MAP

March 10, 2015, 5:16 am
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Hi !!

long time since IworkwithGHeatandGreatMaps ago.I hadproblems withHeatMap (it wasvery slow)so I decided tomigrateto web.Anyway, I'llsee in myrepository ifI havea project that hadmadegheat.You should onlyconsider it was very slowu_u.(alternative u can usemarkers with opacity, which overlap and causea similar effect,and is veryfast, butdifferent)

2015-03-10 9:08 GMT-03:00 Lenvdb64 <[email removed]>:

From: Lenvdb64

I managed to modify the C# source code by adding the modifications to the PointLatLng.cs class.
Then I recompiled the code and produced a DLL I can work with.

Thank you for the Source Code - this has been a great help.
Please ask and I would be happy to share.

The next step now is to use the DLL to create a proper Heat Map. I will let you know how it goes.

Read the full discussion online.

To add a post to this discussion, reply to this email ([email removed])

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New Post: Bing Maps and authentication method

March 10, 2015, 5:17 am
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I am moving away from the GOOGLE Map provider (due to Licensing issues with Google - which is to be expected) to the BING Map Provider instead.

So far all is well. ( I am in the UK). I am doing a simple test - Enter a start postcode into a textbox, and a End postcode into another, and submitting the postcodes to calculate the route and plot it on a Map, and then use the output to show the distance and time in the Output textbox.

With the Google Map Provider the NAME property gives me the Given Distance in Miles + Time taken.

rMapRoute = GMap.NET.MapProviders.GoogleMapProvider.Instance.GetRoute(ptStart, ptEnd, False, False, 15)
g_Route = New GMapRoute(rMapRoute.Points, "RouteData")
Me.txtInfo.Text = rMapRoute.Name ' Gives Miles + Time taken

However in the BING MapProvider the NAME property lists all the points. The Distance Property lists the Distance in Km which is OK because I can convert this to Miles, but no Time taken is provided.

What is the general consensus here? Which Provider other than Google provides a response that gives Distance + Time?
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New Post: HEAT MAP

March 10, 2015, 5:23 am
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Thank you - I will look at this and see how the Heatmap feature works and if it is too slow for me.
Unfortunately a Web solution is not on the cards for me as all my users are Desktop PC users. I use a Windows Forms solution.
I am surprised that Radioman never expanded his GMAPS DLL to include Heatmap capabilities. That would have improved this so much! But I am not complaining. My users so far is happy to use points and add markers. And I am thankful for this DLL and the effort he put into it.
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New Post: Routeing in GMaps (windows forms)

March 10, 2015, 9:44 am
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Is there any way to route the way from A to B? Like in GPS. I am thinking about using just a browser in my program, but if I use GMaps, or something like that it would be more professional.
Thank you for any answer.
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New Post: Routeing in GMaps (windows forms)

March 10, 2015, 9:51 am
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New Post: Routeing in GMaps (windows forms)

March 10, 2015, 9:53 am
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New Post: Why GMAP.net slows down after using large number of markers?

March 10, 2015, 10:17 pm
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Hiee Radioman,
I am using GMAP.NET to mark fences. The problem I am facing is that my app slows down as I keep adding more markers, and in my particular case, becomes un-usable after marking ~(5k) points.
Secondly, when I monitor the ram consumption, I notice that the RAM usage increases proportionally with the addition of points up until it reaches ~40mb of usage, after which it increases very slowly. The memory doesn't free up even when I clear all the markers and fences..
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New Post: Wrong Cursor after dragging the Map

March 11, 2015, 6:55 am
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Hello,

first... Really grat work. Thank you.
I found a little bug.
I use the Windowsforms control.
  • draw a polygon
  • drag the map while the mousepointer is over the polygon
  • leave the polygon
    => the pousepointer is wrong.
    Easytofix:
Create a second before-cursor after "Cursor cursorBefore = Cursors.Default;"
Cursor cursorBeforeDrag = Cursors.Default;
in the mouseMove and IsDragging use cursorBeforeDrag instead of cursorBefore.
cursorBeforeDrag = this.Cursor;
in the Mouseup the same...
this.Cursor = cursorBeforeDrag;
cursorBeforeDrag = null;

It would be nice if it would be fixed

Regards,
Christian
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New Post: Calculate position 1 m from current marker based on direction

March 13, 2015, 5:25 am
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Good day,

I am tyrying to develop code to calculte the position 1 m from a existimg marker in a specified direction, and place a new marker at the calculated spot.

Ive been allover the place and Im sure Im missing the obvious, but any direction/assistance wil be appreciated.
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New Post: GMDB Files !?

March 13, 2015, 12:22 pm
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Hello every one;
Can any one please explain me if the gmdb file will be alone all the time or other gmdb files should appear ?

From the demo i saw the " 1 DB in 32 MB" ; there will be multiple files ? each is 32 MB ?
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New Post: GMDB Files !?

March 14, 2015, 5:20 am
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there can be multiply readonly databases(like usa.gmdb, africa.gmdb, paris.gmdb), and one main read/write Data.gmdb
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New Post: GMDB Files !?

March 14, 2015, 7:54 am
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Thank you; i guess the files are created on the fly whenever its needed.
Can we switch from/to specific files at runtime ? africa.gmdb when i'm on africa and so on , or create custom files ourselves this way ?
thank you
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New Post: GMDB Files !?

March 14, 2015, 8:59 am
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all *gmdb files are used, yes you can export/copy/modify and make custom cache
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New Post: Load kml as polygon VB.NET

March 18, 2015, 10:18 am
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Please help , needs load kml file t as polygon but __VB .NET __only

BIG THANKS FOR EVERYONE!
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New Post: HEAT MAP

March 18, 2015, 11:00 am
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I'd be very interested in a Heat Map implementation. I keep thinking I have to do something someday but I never get around to it. How is it going?
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New Post: Non-Overlapping Tooltips

March 18, 2015, 11:04 am
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Was anything ever created to auto position the tool tips / marker labels so that close markers don't have labels that overlap?

Thanks
FW
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