nplot-devel — NPlot development list

[Nplot-devel] [ nplot-Bugs-2042794 ] Barplot failed to redraw during scrolling

[SourceForge.net <no...@so...>]

Bugs item #2042794, was opened at 2008-08-08 11:36
Message generated for change (Settings changed) made by anmar
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=2042794&group_id=161868

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Category: None
Group: None
>Status: Closed
>Resolution: Invalid
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Barplot failed to redraw during scrolling

Initial Comment:
The barplot is placed along with other line plots in a scrollable tab panel. When the user scrolls up and down of the panel, the barplot gives a big red cross while the line plots redraw ok.

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2008-08-08 11:52

Message:
Logged In: NO 

Sorry that's my fault. Please delete it. Thanks.

----------------------------------------------------------------------

You can respond by visiting: 
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[Nplot-devel] [ nplot-Bugs-2042794 ] Barplot failed to redraw during scrolling

[SourceForge.net <no...@so...>]

Bugs item #2042794, was opened at 2008-08-08 09:36
Message generated for change (Comment added) made by nobody
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=2042794&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Barplot failed to redraw during scrolling

Initial Comment:
The barplot is placed along with other line plots in a scrollable tab panel. When the user scrolls up and down of the panel, the barplot gives a big red cross while the line plots redraw ok.

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2008-08-08 09:52

Message:
Logged In: NO 

Sorry that's my fault. Please delete it. Thanks.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=2042794&group_id=161868

[Nplot-devel] [ nplot-Bugs-2042794 ] Barplot failed to redraw during scrolling

[SourceForge.net <no...@so...>]

Bugs item #2042794, was opened at 2008-08-08 09:36
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=2042794&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Barplot failed to redraw during scrolling

Initial Comment:
The barplot is placed along with other line plots in a scrollable tab panel. When the user scrolls up and down of the panel, the barplot gives a big red cross while the line plots redraw ok.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=2042794&group_id=161868

[Nplot-devel] StartTradingTime and EndTradingTime problem

[<jk...@po...>]

Hi,

I have a intraday stock data. The quotations are between 09:30 and 16:30 so i have gap on the chart (from 16:30 to 9:30 next day). I saw StartTradinTime and EndTradingTime properties (btw great idea) but i must do something wrong because when i set that properties the chart is empty :(

TradingDateTimeAxis TimeAxis = new TradingDateTimeAxis(plotsurface.XAxis1);
TimeAxis.StartTradingTime = new TimeSpan(09, 30, 00);
TimeAxis.EndTradingTime = new TimeSpan(16, 30, 00);
plotsurface.XAxis1 = TimeAxis;

In that case chart is empty, but after i comment TimeAxis.StartTradingTime and TimeAxis.EndTradingTime chart is plot but with gap...

Thank you for help and best regards
Jack

Re: [Nplot-devel] NPlot & SilverLight

[Ben G. <jes...@je...>]

I thought about trying this, but never did. I'm not that familiar with
silverlight yet, so I don't know if/how it would work. You may need to write
another PlotSurface class to use it in silverlight.


On Sun, Jul 20, 2008 at 2:57 PM, Abdelrahman <ah...@gm...> wrote:

> Hi all,
>
> I just want to ask, anybody tried nplot with SilverLight? Can I use it
> inside SilverLight?
>
> regards,
> abdelrahman
>
> -------------------------------------------------------------------------
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> Grand prize is a trip for two to an Open Source event anywhere in the world
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[Nplot-devel] NPlot & SilverLight

[Abdelrahman <ah...@gm...>]

Hi all,

I just want to ask, anybody tried nplot with SilverLight? Can I use it 
inside SilverLight?

regards,
abdelrahman

[Nplot-devel] Capture event when data point is clicked

[MT <mt...@ya...>]

Hello everyone, 

I have been struggling for a while now to implement the feature where I can capture the event when a data point has been clicked.  I would like to display specific info about the data point that is clicked.  In the archives, I have read that someone has tried to implement this.  If anyone has any source code that I can use or at least any tips for me to implement this I would greatly appreciate it.

Thanks


      

[Nplot-devel] [ nplot-Bugs-1630597 ] Overflow error when zooming to much

[SourceForge.net <no...@so...>]

Bugs item #1630597, was opened at 2007-01-08 13:42
Message generated for change (Comment added) made by nobody
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=1630597&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: General
Group: 0.9.9.2
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Jamie McQuay (jamcquay)
Summary: Overflow error when zooming to much

Initial Comment:
When you zoom in too much, you end up with a Overflow exception.
Just open a graph with zoom enabled. Drag a box from left to right, and the height as small as posible - repeat until error.

Stack-trace:
   at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
   at System.Drawing.Graphics.FillPolygon(Brush brush, PointF[] points, FillMode fillMode)
   at System.Drawing.Graphics.FillPolygon(Brush brush, PointF[] points)
   at NPlot.FilledRegion.Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
   at NPlot.PlotSurface2D.Draw(Graphics g, Rectangle bounds)
   at NPlot.Windows.PlotSurface2D.Draw(Graphics g, Rectangle bounds)
   at NPlot.Windows.PlotSurface2D.DoPaint(PaintEventArgs pe, Int32 width, Int32 height)
   at NPlot.Windows.PlotSurface2D.OnPaint(PaintEventArgs pe)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
 

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2008-07-17 13:17

Message:
Logged In: NO 

Handle the PlotSurface2D.PreRefresh event and check the worldmin /
worldmax / worldlength properties of x- and y-axes.

----------------------------------------------------------------------

Comment By: Satya Puvvada (satyasmiles2000)
Date: 2008-02-26 06:47

Message:
Logged In: YES 
user_id=2012175
Originator: NO

This is happening in LinePlot too. When I zoomin to the lowest level, this
is happening. I guess problem could be with Transform.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=1630597&group_id=161868

Re: [Nplot-devel] mouseover text on plot

[Ben G. <jes...@je...>]

Take a look at PhysicalAxis.WorldToPhysical. This will tranlate a world
(data) coordinate to the corresponding physical (screen) coordinate.

You can access the PhysicalAxis objects that were used for the most recent
Draw operation via PlotSurface2D.PhysicalXAxis1Cache (along with the other 3
axises).

To get a list of the data points themselves, I believe you can use
CandleDataAdapter.





On Tue, Jul 1, 2008 at 4:41 PM, MT <mt...@ya...> wrote:

> I am trying to create my own "hit test" but I cant figure out how figure
> out what the coordinates are of each individual data point in the series.
>  Any ideas where that info is stored?
>
> majid
>
> ----- Original Message ----
> From: Ben Gruver <jes...@je...>
> To: npl...@li...
> Sent: Tuesday, July 1, 2008 3:30:42 PM
> Subject: Re: [Nplot-devel] mouseover text on plot
>
> Ah, ok. I see your difficulty. I don't recall seeing any built-in way to
> determine if the cursor is over a data point. (Although that doesn't mean
> it's not there :)).
>
> Assuming it's not, you'll probably have to do your own "hit test" to
> determine this. There are various functions which allow you to translate
> between world and physical coordinates, which you may find helpful.
>
> I'm kinda surprised it doesn't have support for that.. I may just not have
> run across that functionality yet :)
>
>
> On Tue, Jul 1, 2008 at 3:00 PM, MT <mt...@ya...> wrote:
>
> > Thanks Ben for replying.  I did see that function in
> Windows.PlotSurface2D.
> >  However, how would I know if I am mousing over a chart series or not?
>  In
> > other words the mouse over will be different if I am hovering over a
> > candlestick vs if I am in empty space in the chart (i.e. not hovering
> over a
> > series)
> >
> > Any ideas?
> >
> >
> >
> > ----- Original Message ----
> > From: Ben Gruver <jes...@je...>
> > To: npl...@li...
> > Sent: Tuesday, July 1, 2008 2:33:04 PM
> > Subject: Re: [Nplot-devel] mouseover text on plot
> >
> > I think you'll need to modify the nplot source to do this, but it
> shouldn't
> > be difficult. Take a look at Windows.PlotSurface2D.DoMouseMove.
> >
> >
> >
> > On Tue, Jul 1, 2008 at 1:47 PM, MT <mt...@ya...> wrote:
> >
> > >
> > > Is there a way to change the mouseover text when hovering over a series
> > > element.  For example, if the mouse is over a candlestick, I would like
> > to
> > > display the high, low, open, close, volume, date value, etc..  It seems
> > that
> > > i can only display world coordinates.
> > >
> > > Thanks
> > >
> > > mt
> > >
> > >
> > >
> > >
> > >
> -------------------------------------------------------------------------
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> >
> >
> >
> >
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Re: [Nplot-devel] mouseover text on plot

[MT <mt...@ya...>]

I am trying to create my own "hit test" but I cant figure out how figure out what the coordinates are of each individual data point in the series.  Any ideas where that info is stored?

majid

----- Original Message ----
From: Ben Gruver <jes...@je...>
To: npl...@li...
Sent: Tuesday, July 1, 2008 3:30:42 PM
Subject: Re: [Nplot-devel] mouseover text on plot

Ah, ok. I see your difficulty. I don't recall seeing any built-in way to
determine if the cursor is over a data point. (Although that doesn't mean
it's not there :)).

Assuming it's not, you'll probably have to do your own "hit test" to
determine this. There are various functions which allow you to translate
between world and physical coordinates, which you may find helpful.

I'm kinda surprised it doesn't have support for that.. I may just not have
run across that functionality yet :)


On Tue, Jul 1, 2008 at 3:00 PM, MT <mt...@ya...> wrote:

> Thanks Ben for replying.  I did see that function in Windows.PlotSurface2D.
>  However, how would I know if I am mousing over a chart series or not?  In
> other words the mouse over will be different if I am hovering over a
> candlestick vs if I am in empty space in the chart (i.e. not hovering over a
> series)
>
> Any ideas?
>
>
>
> ----- Original Message ----
> From: Ben Gruver <jes...@je...>
> To: npl...@li...
> Sent: Tuesday, July 1, 2008 2:33:04 PM
> Subject: Re: [Nplot-devel] mouseover text on plot
>
> I think you'll need to modify the nplot source to do this, but it shouldn't
> be difficult. Take a look at Windows.PlotSurface2D.DoMouseMove.
>
>
>
> On Tue, Jul 1, 2008 at 1:47 PM, MT <mt...@ya...> wrote:
>
> >
> > Is there a way to change the mouseover text when hovering over a series
> > element.  For example, if the mouse is over a candlestick, I would like
> to
> > display the high, low, open, close, volume, date value, etc..  It seems
> that
> > i can only display world coordinates.
> >
> > Thanks
> >
> > mt
> >
> >
> >
> >
> > -------------------------------------------------------------------------
> > Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> > Studies have shown that voting for your favorite open source project,
> > along with a healthy diet, reduces your potential for chronic lameness
> > and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> > _______________________________________________
> > Nplot-devel mailing list
> > Npl...@li...
> > https://lists.sourceforge.net/lists/listinfo/nplot-devel
> >
> -------------------------------------------------------------------------
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> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
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> Npl...@li...
> https://lists.sourceforge.net/lists/listinfo/nplot-devel
>
>
>
>
> -------------------------------------------------------------------------
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Re: [Nplot-devel] mouseover text on plot

[Ben G. <jes...@je...>]

Ah, ok. I see your difficulty. I don't recall seeing any built-in way to
determine if the cursor is over a data point. (Although that doesn't mean
it's not there :)).

Assuming it's not, you'll probably have to do your own "hit test" to
determine this. There are various functions which allow you to translate
between world and physical coordinates, which you may find helpful.

I'm kinda surprised it doesn't have support for that.. I may just not have
run across that functionality yet :)


On Tue, Jul 1, 2008 at 3:00 PM, MT <mt...@ya...> wrote:

> Thanks Ben for replying.  I did see that function in Windows.PlotSurface2D.
>  However, how would I know if I am mousing over a chart series or not?  In
> other words the mouse over will be different if I am hovering over a
> candlestick vs if I am in empty space in the chart (i.e. not hovering over a
> series)
>
> Any ideas?
>
>
>
> ----- Original Message ----
> From: Ben Gruver <jes...@je...>
> To: npl...@li...
> Sent: Tuesday, July 1, 2008 2:33:04 PM
> Subject: Re: [Nplot-devel] mouseover text on plot
>
> I think you'll need to modify the nplot source to do this, but it shouldn't
> be difficult. Take a look at Windows.PlotSurface2D.DoMouseMove.
>
>
>
> On Tue, Jul 1, 2008 at 1:47 PM, MT <mt...@ya...> wrote:
>
> >
> > Is there a way to change the mouseover text when hovering over a series
> > element.  For example, if the mouse is over a candlestick, I would like
> to
> > display the high, low, open, close, volume, date value, etc..  It seems
> that
> > i can only display world coordinates.
> >
> > Thanks
> >
> > mt
> >
> >
> >
> >
> > -------------------------------------------------------------------------
> > Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> > Studies have shown that voting for your favorite open source project,
> > along with a healthy diet, reduces your potential for chronic lameness
> > and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> > _______________________________________________
> > Nplot-devel mailing list
> > Npl...@li...
> > https://lists.sourceforge.net/lists/listinfo/nplot-devel
> >
> -------------------------------------------------------------------------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
> Nplot-devel mailing list
> Npl...@li...
> https://lists.sourceforge.net/lists/listinfo/nplot-devel
>
>
>
>
> -------------------------------------------------------------------------
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> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
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> https://lists.sourceforge.net/lists/listinfo/nplot-devel
>

Re: [Nplot-devel] mouseover text on plot

[MT <mt...@ya...>]

Thanks Ben for replying.  I did see that function in Windows.PlotSurface2D.  However, how would I know if I am mousing over a chart series or not?  In other words the mouse over will be different if I am hovering over a candlestick vs if I am in empty space in the chart (i.e. not hovering over a series)

Any ideas?



----- Original Message ----
From: Ben Gruver <jes...@je...>
To: npl...@li...
Sent: Tuesday, July 1, 2008 2:33:04 PM
Subject: Re: [Nplot-devel] mouseover text on plot

I think you'll need to modify the nplot source to do this, but it shouldn't
be difficult. Take a look at Windows.PlotSurface2D.DoMouseMove.



On Tue, Jul 1, 2008 at 1:47 PM, MT <mt...@ya...> wrote:

>
> Is there a way to change the mouseover text when hovering over a series
> element.  For example, if the mouse is over a candlestick, I would like to
> display the high, low, open, close, volume, date value, etc..  It seems that
> i can only display world coordinates.
>
> Thanks
>
> mt
>
>
>
>
> -------------------------------------------------------------------------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
> Nplot-devel mailing list
> Npl...@li...
> https://lists.sourceforge.net/lists/listinfo/nplot-devel
>
-------------------------------------------------------------------------
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Studies have shown that voting for your favorite open source project,
along with a healthy diet, reduces your potential for chronic lameness
and boredom. Vote Now at http://www.sourceforge.net/community/cca08
_______________________________________________
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Npl...@li...
https://lists.sourceforge.net/lists/listinfo/nplot-devel



      

Re: [Nplot-devel] mouseover text on plot

[Ben G. <jes...@je...>]

I think you'll need to modify the nplot source to do this, but it shouldn't
be difficult. Take a look at Windows.PlotSurface2D.DoMouseMove.



On Tue, Jul 1, 2008 at 1:47 PM, MT <mt...@ya...> wrote:

>
> Is there a way to change the mouseover text when hovering over a series
> element.  For example, if the mouse is over a candlestick, I would like to
> display the high, low, open, close, volume, date value, etc..  It seems that
> i can only display world coordinates.
>
> Thanks
>
> mt
>
>
>
>
> -------------------------------------------------------------------------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
> Nplot-devel mailing list
> Npl...@li...
> https://lists.sourceforge.net/lists/listinfo/nplot-devel
>

Re: [Nplot-devel] nplot cryptographic error

[MT <mt...@ya...>]

Thank you.  That fixed my problem.

majid



----- Original Message ----
From: Ben Gruver <jes...@je...>
To: npl...@li...
Sent: Tuesday, July 1, 2008 12:42:12 PM
Subject: Re: [Nplot-devel] nplot cryptographic error

The easiest way to resolve this is to open the AssemblyInfo.cs file, and
delete the AssemblyKeyFile value.

Also, you may want to grab the latest source from SVN, I think it's more up
to date than the zip download that's available (not positive)



On Tue, Jul 1, 2008 at 12:04 PM, MT <mt...@ya...> wrote:

> Hello
> I am trying to build nplot code from src however I am seeing a
> cryptographic failure error message.  It seems it is looking for a CSC file
> that doesnt exist.  Does anyone know how I can get this file and how I can
> build the code from src.  I am using vs 2005 and using msbee, if that makes
> a difference.
>
>
>
> -------------------------------------------------------------------------
> Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW!
> Studies have shown that voting for your favorite open source project,
> along with a healthy diet, reduces your potential for chronic lameness
> and boredom. Vote Now at http://www.sourceforge.net/community/cca08
> _______________________________________________
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> https://lists.sourceforge.net/lists/listinfo/nplot-devel
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[Nplot-devel] mouseover text on plot

[MT <mt...@ya...>]

Is there a way to change the mouseover text when hovering over a series element.  For example, if the mouse is over a candlestick, I would like to display the high, low, open, close, volume, date value, etc..  It seems that i can only display world coordinates.

Thanks

mt



      

Re: [Nplot-devel] nplot cryptographic error

[Angel M. <an...@an...>]

MT wrote:
> Hello 
> I am trying to build nplot code from src however I am seeing 
> a cryptographic failure error message.  It seems it is looking 
> for a CSC file that doesnt exist.  Does anyone know how I can 
> get this file and how I can build the code from src.  I am using 
> vs 2005 and using msbee, if that makes a difference.


You have to generate a key file before the first build (in order to get
a strong named .dll). sn.exe tool that comes with .net SDK will do:

sn.exe -k NPlot-key.snk

Then put the resulting .snk file in nplot's folder.

Regards,
-- 
Angel Marin
http://anmar.eu.org/

Re: [Nplot-devel] nplot cryptographic error

[Ben G. <jes...@je...>]

The easiest way to resolve this is to open the AssemblyInfo.cs file, and
delete the AssemblyKeyFile value.

Also, you may want to grab the latest source from SVN, I think it's more up
to date than the zip download that's available (not positive)



On Tue, Jul 1, 2008 at 12:04 PM, MT <mt...@ya...> wrote:

> Hello
> I am trying to build nplot code from src however I am seeing a
> cryptographic failure error message.  It seems it is looking for a CSC file
> that doesnt exist.  Does anyone know how I can get this file and how I can
> build the code from src.  I am using vs 2005 and using msbee, if that makes
> a difference.
>
>
>
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[Nplot-devel] nplot cryptographic error

[MT <mt...@ya...>]

Hello 
I am trying to build nplot code from src however I am seeing a cryptographic failure error message.  It seems it is looking for a CSC file that doesnt exist.  Does anyone know how I can get this file and how I can build the code from src.  I am using vs 2005 and using msbee, if that makes a difference.


      

[Nplot-devel] Nplot refresh performance problem

[Daniel C. B. <pi...@gm...>]

Hi!. My name is Daniel and i´m trying to use NPlot to develop a little app
that receives values from an usb device (the USB-1208LS of Measurement
Computing), and i have a big performance problem with the Refresh´s
PlotSurface method.

Is there a way to plot only the new data between iterations?.

Thanks a lot.

[Nplot-devel] [ nplot-Bugs-2000693 ] Axis Ticks drawn at wrong angle

[SourceForge.net <no...@so...>]

Bugs item #2000693, was opened at 2008-06-23 12:03
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=2000693&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: General
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Hywel Thomas (hywelthomas)
Assigned to: Nobody/Anonymous (nobody)
Summary: Axis Ticks drawn at wrong angle 

Initial Comment:
TicksAngle is defined to be anti-clockwise from the axis direction for a positive angle (as is conventional for 2D coordinates).
However, existing code draws ticks at wrong (ie clockwise) rotation.

Demonstration:  	AxisTestsForm.cs.patch has extra X-axes drawn to show this problem.
Test code in:	NPlot\demo\csharp\src\AxisTestForm.cs

Cause: Because the physical (pixel) origin in System.Drawing.Graphics is at the top left of the screen, rotations  (as in RotateTransform) are clockwise.  This 

has caused some confusion when drawing the Ticks, and the existing code uses both the negative of the TicksAngle and the (A-B) trignometrical formula to 

rotate the tick.

Resolution: The code in Axis.cs has been corrected and comments added to clarify its operation.

In addition, it is conventional to place ticks *outside* the plot area (ie to the left of the positive Y_axis and below the positive X-axis) so that the default 

values for a new Axis should be:-

TicksAngle_ = 3.0f * PI / 2.0f;  // or -PI/2.0f
TickTextNextToAxis = false;

and these changes have been made to the Axis constructor routine.

The axis constructors in PlotSurface2D.cs have the correct TicksAngle defined and do not need changing.

Only one of the demo routines (Mockup demo) uses specific values for TicksAngle, and the default values will now be correct.  Lines have been removed 

from PlotSurface2DDemo.cs to allow the default values to stand.

Note that in all demos, the Ticks are now drawn outside the plot area (which is the convention)
If the original appearance is preferred, TicksAngle must be set to PI/2.0f specifically.


Files affected:-
NPlot\src\Axis.cs;
NPlot\demo\charp\src\PlotSurface2DDemo.cs
NPlot\demo\csharp\src\AxisTestForm.cs





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[Nplot-devel] [ nplot-Bugs-1901521 ] Y Axis recommendation extended while X Axis is not

[SourceForge.net <no...@so...>]

Bugs item #1901521, was opened at 2008-02-25 10:59
Message generated for change (Comment added) made by jesusfreke
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821568&aid=1901521&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: General
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Matthew McDougal (mmdoogie)
Assigned to: Nobody/Anonymous (nobody)
Summary: Y Axis recommendation extended while X Axis is not

Initial Comment:
I ran into a problem that I wouldn't have even noticed had I not been trying to use a LogAxis as the Y Axis on a plot.

myPlotSurface.YAxis1 = new LogAxis(myLinePlot.SuggestYAxis)

When I then tried to refresh my plot, it would fail saying I can't have negative data on a log axis, but of course I didn't have any negative data.

Looking at the SequenceAdapter code in SVN, which I've trimmed a little just to get the relevant parts:

public Axis SuggestXAxis()
{
   Axis a = this.XAxisSuggester_.Get();

   // The world length should never be returned as 0
   // This would result in an axis with a span of 0 units
   // which can not be properly displayed.
   if (a.WorldLength == 0.0)
   {
      a.IncreaseRange(0.08);
   }
   
   return a;
}

public Axis SuggestYAxis()
{
   Axis a = this.YAxisSuggester_.Get();
   a.IncreaseRange(0.08);

   return a;
}

Basically, what occurs is on the X axis, the range is only increased if the returned axis was zero, but on the Y axis, it is always increased by +/- 8% of the range.  If your span is sufficiently large enough, and your lower limit close enough to zero, the range can get extended negative.

There may be a reason I don't know about, but if there isn't, I would suggest making the Y axis behave in the same manner as the X axis.

--matt

----------------------------------------------------------------------

Comment By: JesusFreke (jesusfreke)
Date: 2008-06-04 20:42

Message:
Logged In: YES 
user_id=2104277
Originator: NO

I ran into this same problem. Here's a quick code sample that generates
the error:

NPlot.Bitmap.PlotSurface2D plot = new NPlot.Bitmap.PlotSurface2D(1000,
1000);

LogAxis verticalAxis = new LogAxis();
plot.YAxis1 = verticalAxis;

System.Collections.ArrayList yvalues = new
System.Collections.ArrayList();
yvalues.Add(1);
yvalues.Add(1000000);

System.Collections.ArrayList xvalues = new
System.Collections.ArrayList();
xvalues.Add(0);
xvalues.Add(1);

LinePlot linePlot = new LinePlot(yvalues, xvalues);
plot.Add(linePlot);


A workaround to this issue is to add the lineplot first, and then the log
axis.


The problem is because the yaxis range is increased by 8%, and then that
new range is passed to the "LUB" method of the log axis, which complains
because the lower bound of the "suggested" axis is negative. I'm not
familiar enough with the code to know what the best way to fix this might
be. I don't think it would be to remove the 8% range increase altogether, I
assume that is done for display reasons, so that the data doesn't go right
up against the top and bottom of the graph.

----------------------------------------------------------------------

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[Nplot-devel] Axis.TicksAngle patch

[Hywel T. <hy...@co...>]

This patch corrects the TicksAngle code in Axis.cs

Files affected:    Axis.cs, PlotSurface2DDemo.cs



TicksAngle is defined to be anti-clockwise from the axis direction for a 
positive angle (as is conventional for 2D coordinates).  However, 
because the physical (pixel) origin in System.Drawing.Graphics is at the 
top left of the screen, rotations  (as in RotateTransform) are 
clockwise.  This has caused some confusion when drawing the Ticks, and 
the code uses both the negative of the TicksAngle and the (A-B) 
trignometrical formula to rotate the tick.

The above changes have been made, the formulae have been rearranged, and 
some additional comments added to the code to clarify it (hopefully!)

In addition, it is conventional to place ticks *outside* the plot area 
(ie to the left of the positive Y_axis and below the positive X-axis) so 
that the default values for a new Axis should be:-

TicksAngle_ = 3.0f * PI / 2.0f;  // or -PI/2.0f
TickTextNextToAxis = false;

and these changes have been made to the Axis constructor routine.

The axis constructors in PlotSurface2D.cs have the correct TicksAngle 
defined and do not need changing.


Only one of the demo routines (Mockup demo) uses specific values for 
TicksAngle, and the default values will now be correct.  Lines have been 
removed from PlotSurface2DDemo.cs to allow the default values to stand.

Note that in all demos, the Ticks are now drawn outside the plot area 
(which is the convention), and if the original appearance is preferred, 
TicksAngle must be set to PI/2.0f specifically.

[Nplot-devel] [ nplot-Feature Requests-1967988 ] Lines dissapear when zooming

[SourceForge.net <no...@so...>]

Feature Requests item #1967988, was opened at 2008-05-20 07:23
Message generated for change (Comment added) made by nobody
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821571&aid=1967988&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: General
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Lines dissapear when zooming

Initial Comment:
Hi very nice tool,
found a problem though that I could not solve.
When plotting a line and zooming in the graph the
line will dissapear as soon as  of the points 
defining the line is no longer inside the axes limits.
Understand that it is probably an optimisation not
to draw lines outside the view, but the line should
still be visible if it intersects the window....

/NPlot fan

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2008-05-20 07:56

Message:
Logged In: NO 

Found the problem area myself after all...
Commented out the code

if ((dx1 < leftCutoff || rightCutoff < dx1) &&
    (dx2 < leftCutoff || rightCutoff < dx2))
{
    continue;
}

in "LinePlot.cs" and then no lines will dissapear when zooming in.

----------------------------------------------------------------------

You can respond by visiting: 
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[Nplot-devel] [ nplot-Feature Requests-1967988 ] Lines dissapear when zooming

[SourceForge.net <no...@so...>]

Feature Requests item #1967988, was opened at 2008-05-20 07:23
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821571&aid=1967988&group_id=161868

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: General
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Lines dissapear when zooming

Initial Comment:
Hi very nice tool,
found a problem though that I could not solve.
When plotting a line and zooming in the graph the
line will dissapear as soon as  of the points 
defining the line is no longer inside the axes limits.
Understand that it is probably an optimisation not
to draw lines outside the view, but the line should
still be visible if it intersects the window....

/NPlot fan

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=821571&aid=1967988&group_id=161868

Re: [Nplot-devel] obtaining xy coordinates on mousedown event

[Bartek K <mor...@gm...>]

Bullseye! thanks alot. I'm using NPlot in
my thesis at the university so probably will be bothering you with
questions couple more times.

So long!
Bartek

2008/4/22, DHe...@ao... <DHe...@ao...>:
>
> Bartek,
>
> Looks like the code you are looking for is in the Nplot  library file:
> Windows.PlotSurface2D.cs in the DoMouseMove function.
> Look  for "if ( coordinates_.Active )" - the code you need is after the
> "if".
>
> I  tried this:
> If you create a MouseClick event for your plotsurface instance  and add
> the
> following code:
>
> Point here =  new Point(e.X, e.Y);
> double x =  plotSurface.PhysicalXAxis1Cache.PhysicalToWorld(here,
> true);
> double y =  plotSurface.PhysicalYAxis1Cache.PhysicalToWorld(here,
> true);
>
> The x  & y should be the coordinates you are looking for.
>
>
> Did you get  the source code for Nplot to compile?
> Deb
>
> -----Original  Message-----
> From: Bartek K [mailto:mor...@gm...]
> Sent: Monday,  April 21, 2008 9:45 PM
> To: npl...@li...
> Subject:  [Nplot-devel] obtaining xy coordinates on mousedown  event
>
> Hello!
>
> Cant find solution to my problem..
> When displaying  plot with showcoordinates property set to 'true' i can
> see
> coordinates next  to mouse cursor. The problem is I don't know how to
> assign
> current x/y coord  to a variable. Any ideas would be appreciated!
>
> --
> bartek  kujda
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-- 
bartek kujda