scalebar-problem with csharp-mapscript

[Christian Wilmes]

Hi Tamas,

thanks for your quick response. I tried it out, but there are still the same exeptions.

My new code:
scalebarObj scalebar = myMap.scalebar;
            labelObj labelScalebar = scalebar.label;

            labelScalebar.size = 12;
            labelScalebar.type = MS_FONT_TYPE.MS_BITMAP;
            labelScalebar.color = new colorObj(255, 0, 255, 0);

            
            scalebar.height = pictureBoxScalebar.Height;
            scalebar.width = pictureBoxScalebar.Width;
            scalebar.intervals = 5;
            //scalebar.label = labelScalebar;
            scalebar.position = (int)MS_LABEL_POSITIONS.MS_UL;
            scalebar.style = 0; //0 or 1
            scalebar.status = mapscript.MS_EMBED;
            scalebar.units = (int)MS_UNITS.MS_KILOMETERS;


Best Regards
Christian



-------- Original-Nachricht --------
Datum: Mon, 19 Jun 2006 18:08:09 +0200
Von: Tamas Szekeres <szekerest at GMAIL.COM>
An: MAPSERVER-USERS at LISTS.UMN.EDU
Betreff: Re: [UMN_MAPSERVER-USERS] scalebar-problem with csharp-mapscript

> Christian,
> 
> scalebarObj is added to the map by default and also the labelObj is
> added to the scalebar so you should use these objects in the following
> way:
> 
>              scalebarObj scalebar = myMap.scalebar;
>              scalebar.height = pictureBoxScalebar.Height;
>              scalebar.width = pictureBoxScalebar.Width;
>              scalebar.intervals = 5;
>              scalebar.label = labelScalebar;
>              scalebar.position = (int)MS_LABEL_POSITIONS.MS_UL;
>              scalebar.style = 0; //0 or 1
>              scalebar.status = mapscript.MS_EMBED;
>              scalebar.units = (int)MS_UNITS.MS_KILOMETERS;
>              labelObj labelScalebar = scalebar.label;
>              labelScalebar.size = 12;
>              labelScalebar.type = MS_FONT_TYPE.MS_BITMAP;
>              labelScalebar.color = new colorObj(255, 0, 255, 0);
> 
> This problem is related to the following bug:
> http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1803
> 
> You should also avoid to use the object members mentioned there as
> writeable properties.
> 
> Best Regards,
> 
> Tamas
> 
> 
> 
> 2006/6/19, Christian Wilmes <C.Wilmes at gmx.de>:
> > Hi All,
> >
> > if I try to add a scalebar to my map I get exceptions.The code for the
> scalebar:
> >             labelObj labelScalebar = new labelObj();
> >             labelScalebar.size = 12;
> >             labelScalebar.type = MS_FONT_TYPE.MS_BITMAP;
> >             labelScalebar.color = new colorObj(255, 0, 255, 0);
> >
> >             scalebarObj scalebar = new scalebarObj();
> >             scalebar.height = pictureBoxScalebar.Height;
> >             scalebar.width = pictureBoxScalebar.Width;
> >             scalebar.intervals = 5;
> >             scalebar.label = labelScalebar;
> >             scalebar.position = (int)MS_LABEL_POSITIONS.MS_UL;
> >             scalebar.style = 0; //0 or 1
> >             scalebar.status = mapscript.MS_EMBED;
> >             scalebar.units = (int)MS_UNITS.MS_KILOMETERS;
> >
> >             myMap.scalebar = scalebar;
> >
> >
> >
> >
> >
> >
> > Using myMap.drawScalebar() I get the following exception:
> > System.ApplicationException was unhandled
> >   Message="msGetBitmapFont(): GD library error. Invalid bitmap font.
> Must be one of tiny, small, medium, large or giant."
> >   Source="mapscript_csharp"
> >   StackTrace:
> >        at mapObj.drawScalebar()
> >        at GeoDataPipelineViewer.GDPV.RefreshMap() in C:\src\Visual
> Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line
> 415
> >        at GeoDataPipelineViewer.GDPV.showMap() in C:\src\Visual Studio
> 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 385
> >        at GeoDataPipelineViewer.GDPV..ctor() in C:\src\Visual Studio
> 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 45
> >        at GeoDataPipelineViewer.Program.Main() in C:\src\Visual Studio
> 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\Program.cs:line 19
> >        at System.AppDomain.nExecuteAssembly(Assembly assembly, String[]
> args)
> >        at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
> assemblySecurity, String[] args)
> >        at
> Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
> >        at System.Threading.ThreadHelper.ThreadStart_Context(Object
> state)
> >        at System.Threading.ExecutionContext.Run(ExecutionContext
> executionContext, ContextCallback callback, Object state)
> >        at System.Threading.ThreadHelper.ThreadStart()
> >
> >
> >
> >
> >
> >
> > Using MyMap.draw() I get the following Exception:
> > System.AccessViolationException was unhandled
> >   Message="Attempted to read or write protected memory. This is often an
> indication that other memory is corrupt."
> >   Source="mapscript_csharp"
> >   StackTrace:
> >        at mapscriptPINVOKE.mapObj_draw(HandleRef jarg1)
> >        at mapObj.draw()
> >        at GeoDataPipelineViewer.GDPV.RefreshMap() in C:\src\Visual
> Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line
> 400
> >        at GeoDataPipelineViewer.GDPV.showMap() in C:\src\Visual Studio
> 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 385
> >        at GeoDataPipelineViewer.GDPV..ctor() in C:\src\Visual Studio
> 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 45
> >        at GeoDataPipelineViewer.Program.Main() in C:\src\Visual Studio
> 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\Program.cs:line 19
> >        at System.AppDomain.nExecuteAssembly(Assembly assembly, String[]
> args)
> >        at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
> assemblySecurity, String[] args)
> >        at
> Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
> >        at System.Threading.ThreadHelper.ThreadStart_Context(Object
> state)
> >        at System.Threading.ExecutionContext.Run(ExecutionContext
> executionContext, ContextCallback callback, Object state)
> >        at System.Threading.ThreadHelper.ThreadStart()
> >
> >
> > I think the problem is the label, like it is described in the first
> exception but how could I set the bitmap-font, and where can I find a enum for
> that or some constants like MS_MEDIUM?
> > Or is there just another reason why that doesn't work?
> >
> > Best Regards
> > Christian
> >
> >
> >
> > --
> >
> >
> > Echte DSL-Flatrate dauerhaft für 0,- Euro*!
> > "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl
> >

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