[Fxplot-users] Re: Fxplot-users digest, Vol 1 #2 - 1 msg

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Hi Jean-Do,

Jean-Dominique Barnichon escreveu:

> Rafael,
>
> got the right adress now...
>
> I'm using FOX 1.5.13, not 1.4.x.
> Following your advice, i replaced the old method with their 
> corresponding new version (FOX 1.5 and above) in the following two lines:
>    FXString ext=FXPath::extension(file); // old version for FOX 1.4.x: 
> FXFile::extension(file);
>    if(FXStat::exists(file)){   // old version for FOX 1.4.x: 
> if(FXFile::exists(file)){
> Everything now compiles fine on VC7.0 with FOX1.5.13.

I'll add some #ifdef's for the 1.6 branch, then in the new release you 
could just devine the directive FOX_1_6 and the things will work.

> Moreover, i 've successfully compiled and run the curves.cpp sample 
> file you provide with FXPlot 0.2.0.
> As this is a good example to start with using FXPlot, i should not 
> have much difficulties to use FXPlot in my application.
>
> After having playing a bit with it, i've got few additional questions:
>
> 1) in the method given below:
> long FXPlotBase::onSave(FXObject* obj,FXSelector sel,void* ptr){
>    FXString file("Exporting Plot to File");
>    FXFileDialog dlg(this,file);
>    dlg.setFilename(name + ".png");
> why is the png type set by default?
> It does not work on my system as i did not compile the png lib (i got 
> jpeg anf gif support, not png). As a result, when i want to save an 
> image, it opens a dialog box with the png extension, whereas this 
> extension is not proposed in the corresponding drop-down liston the 
> dialog.

Yes, it is a bug. I fixed that, will be in the next release. Thank you 
for reporting.

>
> 2) the behaviour of the zoom tool is basically to apply a 
> magnification factor around the picked point. Is there another zoom 
> tool based on the direct mouse selection of the rectangular region to 
> be magnified?

Currently there is no support for this feature, but it should be not 
difficult to add. Unfortunatelly I have no time to do it right now. I 
can help if you want to implement it.

>
> 3) once you have zoomed, it may be useful to be able to apply some 
> translation or pan (xy shift) to the graph, instead of going back to 
> the original image and zooming again at another place.
> Is it possible to do that?

Not yet, and I think that this is not so easy to implement in an 
efficient way. I use double buffering to draw the plot, first the plot 
is drawn into a memory image and then into the window.

>
> 4) Is it possible to have some interaction (e.g. mouse selection) of 
> objects that are drawn (such as points and/or lines)?

No, but this is very desirable. Again if you want to contribute on this...

Cheers.

>
> Best regards,
> Jean-Do
>
> fxp...@li... a écrit :
>
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>> Today's Topics:
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>>   1. Re: Problem using FXPlot2D (Rafael de Pelegrini Soares)
>>
>> --__--__--
>>
>> Message: 1
>> Date: Sun, 29 Jan 2006 21:25:30 -0200
>> From: Rafael de Pelegrini Soares <ra...@rp...>
>> To: Jean-Dominique Barnichon <jea...@fr...>, 
>> fxp...@li...
>> Subject: [Fxplot-users] Re: Problem using FXPlot2D
>>
>> Hi Jean,
>>
>> Regargind the mail list, I think you sent the message for the wrong 
>> address, the correct is fxp...@li....
>>
>> About your questions, which version of FOX are you using?
>> Currently only version 1.4.X is supported, appears that in new 
>> versions exists() and extension() have moved from the FXFile. I think 
>> the new version is FX::FXStat::exists() and 
>> FX::FXFileAssoc::extension().
>>
>> Some time ago I have compiled it with VC7 with no problem.
>> Sory for the question, but have you included the FXPlot2D.h header in 
>> your file?
>> Please take a look at the file curves.cpp and check if you could 
>> generate an executable for it.
>>
>> With the best wishes,
>> Rafael.
>>
>> Jean-Dominique Barnichon escreveu:
>>
>>  
>>
>>> I send it again as ther was a problem at the sf mailman
>>>
>>> Hello Rafael,
>>>
>>> Remember me..., we had some email exchange mid-december on the Fox 
>>> list. I was (and i still am) looking for a charting library to do 
>>> basic 2D plots.
>>>
>>> I now came to a point in my project where i do need 2D chart, so now 
>>> it's time for me to get hands on.
>>> So, i 've downloaded file FXPlot-0.2.0.zip from sourceforge, and 
>>> build it as a static library.
>>> I'm developing under VC++7.0 with Visual Studio, so i did not use 
>>> what you recommend on sf web site (i.e. using scons). Instead, i 
>>> added a project to Fox, added the .h and .cpp files contained in the 
>>> zip file, and compiled it as a static library.
>>> Just to mention, the compiler complained at two points in the file 
>>> FXPlotBase.cpp :
>>> Bug 1)
>>> apparently, neither "extension" nor "exists" are method belonging to 
>>> class FXfile, so
>>> at line 48, i replaced
>>>  FXString ext=FXFile::extension(file);
>>> by
>>>  FXString ext="jpg";
>>> and i commented lines 106 to 109 (test on file existence):
>>> /*        if(FXFile::exists(file)){
>>>          
>>> if(MBOX_CLICKED_NO==FXMessageBox::question(this,MBOX_YES_NO,"Overwrite 
>>> File","Overwrite existing file: %s?",file.text()))
>>>              return 1;
>>>      }*/
>>>
>>> Having done that, i obtained the lib file
>>>
>>> Now, i'm trying to use your lib in an example from Fox (obviously 
>>> after setting correct path for lib and include).
>>> So, i try to create a pointer to FXPlot2D with the line :
>>>   FXPlot2D *2DChart;
>>> This line leads to a compiler error syntax error : insufficient 
>>> suffix number
>>> c:\Fox\FxPir3D\MyFile.h(150) : error C2059: syntax error : 
>>> 'incorrect suffix number '
>>> c:\Fox\FxPir3D\MyFile.h(150) : error C2059: syntax error : 'constant'
>>> c:\Fox\FxPir3D\MyFile.h(150) : error C2238: unexpected "jetons" 
>>> before ';'
>>>
>>> Any idea?
>>> Btw, have you already compiled FXPlot under VC7.0?
>>>
>>> Thanks for you help.
>>> Jean-Do
>>>
>>>   
>>
>>
>>
>>
>>
>> --__--__--
>>
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>

-- 
:: MSc(Eng)  Rafael de Pelegrini Soares
:: ra...@rp...  -  www.rps.eng.br