Hi Pedro
Traditionally colour 0 has always been the background colour, so
plscol0 passing in colour 0 is the same as plscolbg. You should use
plcol(1) or upwards for rendering. In some ways it is up to you how
you do that. You can either set up you pallet at the beginning using
plscol0 or plscsol0a then use plcol0(1), plcol0(2) etc, or you can
just always use plscol0(1), but use repeated calls to plscol0 or
plscol0a to keep changing colour 1.
Do you happen to call plenv() after setting colour 0 to black again? I
have a feeling that plenv() may clear the page again. But I'm not
sure. If you are still haing problems using colours 1 and above for
drawing then let us know and I'll have a further look.
I don't think I can or should remove the plinit call in
wxPLstream::Create because I think that has been there a long time and
would break other users' existing code. However I could overload the
Create function so that it accepts some extra initialisation variables
such as background colour.
Phil
On 6 October 2016 at 16:41, Pedro Vicente
<pedro.vice...@space-research.org> wrote:
> Phil
>
>
> I believe there is stiil an issue with this solution
>
> my sample worked because I had
>
> plcol0(8);
>
> that does the plot in brown color
>
> if I try to plot in black color (on white bacground now) by doing
>
> plcol0(0);
>
> then I have no plot, since color 0 is now white
>
> is there a way with this solution to define color 0 as black for the plot?
>
> I tried to call
>
> plscol0(0, 0, 0, 0);
>
> as
>
> wxPLplotstream* pls = plotwindow->GetStream();
> pls->adv(0);
> pls->scolbg(255, 255, 255);
> pls->clear();
> plscol0(0, 0, 0, 0);
>
> but like this I have the default red on black again
>
>
> for now, the way I was able to have the black on white background was to
> replicate all the code
> of
> wxPLplotwindow
> wxPLplotwindow
>
> into new classes , giving them another name, commenting the init() call on
> them and then
> doing this code (note that the classes are renamed to wx_PLplotwindow and
> wx_PLplotstream)
>
>
>
>
> bool wxAppPlot::OnInit()
> {
> wx_PLplotwindow<wxFrame> *frame = new wx_PLplotwindow<wxFrame>();
> frame->Create(NULL, wxID_ANY, wxT("wxPLplot"),
> wxDefaultPosition,
> wxSize(900, 700));
> frame->Show();
>
> //set background color (0) to white RGB(255,255,255)
> //must be called before plinit()
> plscolbg(255, 255, 255);
>
> wx_PLplotstream* pls = frame->GetStream();
> pls->init();
>
> //change color (0) to black RGB(0, 0, 0)
> //must be called after plinit()
> plscol0(0, 0, 0, 0);
>
> Plot(frame);
> return true;
> }
>
> /////////////////////////////////////////////////////////////////////////////////////////////////////
> //Plot
> /////////////////////////////////////////////////////////////////////////////////////////////////////
>
> template< class WXWINDOW >
> void Plot(wx_PLplotwindow<WXWINDOW> *plotwindow)
> {
> wx_PLplotstream* pls = plotwindow->GetStream();
>
> //render
> const int NSIZE = 101;
> PLFLT x[NSIZE], y[NSIZE];
> PLFLT xmin = 0, xmax = 100, ymin = 0, ymax = 10;
>
> for (int i = 0; i < NSIZE; i++)
> {
> x[i] = i;
> y[i] = 5;
> }
>
> plschr(0, 1.0);
> plcol0(0);
> plenv(xmin, xmax, ymin, ymax, 0, 0);
> pllab("x", "y", "Label");
> plpoin(NSIZE, x, y, 46);
>
> plotwindow->RenewPlot();
> }
>
>
>
>
> ----- Original Message ----- From: "Pedro Vicente"
> <pedro.vice...@space-research.org>
> To: "Phil Rosenberg" <p.d.rosenb...@gmail.com>
> Cc: <plplot-gene...@lists.sourceforge.net>;
> <plplot-devel@lists.sourceforge.net>
> Sent: Thursday, October 06, 2016 10:44 AM
>
> Subject: Re: [Plplot-devel] [Plplot-general] wxWidgets driver -- change
> thedefault blackbackground
>
>
>> Hi Phil, Alan
>>
>> This solution worked for me, thanks
>>
>>
>>> The easiest way to do this at the moment is something like
>>>
>>> wxPLplotstream* pls = plotwindow->GetStream();
>>> pls->adv( 0 );
>>> pls->scolbg(255, 255, 255);
>>> pls->clear();
>>> //rest of your plotting code
>>
>>
>>
>>
>>> I'm very open to better ways
>>> to do this if you have suggestions.
>>
>>
>> The only suggestion I have is the one I sent on my previous mail, that
>> was *not* to have
>>
>> wxPLplotstream::Create
>>
>> call
>>
>> init()
>>
>> and let the user do that on his application.
>>
>>
>> By looking at the samples, I believe they all call plinit() at start,
>>
>>
>>
>> my complete test code is now
>>
>>
>> #include "wx/wxprec.h"
>> #include "wx/wx.h"
>> #include "wxPLplotwindow.h"
>>
>> template< class WXWINDOW >
>> void Plot(wxPLplotwindow<WXWINDOW> *plotwindow);
>>
>>
>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>> //wxAppPlot
>>
>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>>
>> class wxAppPlot : public wxApp
>> {
>> public:
>> virtual bool OnInit();
>> };
>>
>> IMPLEMENT_APP(wxAppPlot)
>>
>> bool wxAppPlot::OnInit()
>> {
>> wxPLplotwindow<wxFrame> *frame = new wxPLplotwindow<wxFrame>();
>> frame->Create(NULL, wxID_ANY, wxT("wxPLplot"),
>> wxDefaultPosition,
>> wxSize(900, 700));
>> frame->Show();
>> Plot(frame);
>> return true;
>> }
>>
>>
>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>> //Plot
>>
>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>>
>> template< class WXWINDOW >
>> void Plot(wxPLplotwindow<WXWINDOW> *plotwindow)
>> {
>> wxPLplotstream* pls = plotwindow->GetStream();
>> pls->adv(0);
>> pls->scolbg(255, 255, 255);
>> pls->clear();
>>
>> //render
>>
>> const int NSIZE = 101;
>> PLFLT x[NSIZE], y[NSIZE];
>> PLFLT xmin = 0, xmax = 100, ymin = 0, ymax = 10;
>>
>> for (int i = 0; i < NSIZE; i++)
>> {
>> x[i] = i;
>> y[i] = 5;
>> }
>>
>> plschr(0, 1.0);
>> plcol0(8);
>> plenv(xmin, xmax, ymin, ymax, 0, 0);
>> pllab("x", "y", "Label");
>> plpoin(NSIZE, x, y, 46);
>>
>> plotwindow->RenewPlot();
>> }
>>
>>
>> -Pedro
>>
>> ----- Original Message ----- From: "Phil Rosenberg"
>> <p.d.rosenb...@gmail.com>
>> To: "Pedro Vicente" <pedro.vice...@space-research.org>
>> Cc: <plplot-gene...@lists.sourceforge.net>;
>> <plplot-devel@lists.sourceforge.net>
>> Sent: Thursday, October 06, 2016 5:55 AM
>> Subject: Re: [Plplot-devel] [Plplot-general] wxWidgets driver -- change
>> the
>> default blackbackground
>>
>>
>>> Hi Pedro
>>> The easiest way to do this at the moment is something like
>>>
>>> wxPLplotstream* pls = plotwindow->GetStream();
>>> pls->adv( 0 );
>>> pls->scolbg(255, 255, 255);
>>> pls->clear();
>>> //rest of your plotting code
>>>
>>> If you have multiple subpages then you will need to do this on each
>>> page. Also if your subpages don't cover all the windows then you can
>>> call the SetBackgroundColour method of wxPLplotwindow and this will
>>> clear the whole window to the given colour initially.
>>>
>>> Hope that helps. If not then let me know. I'm very open to better ways
>>> to do this if you have suggestions.
>>>
>>> Phil
>>>
>>>
>>> On 6 October 2016 at 06:00, Pedro Vicente
>>> <pedro.vice...@space-research.org> wrote:
>>>>
>>>>
>>>> so, there are at least 2 solutions for this :
>>>> 1) the quick is just to modify the PLplot source code , in the call to
>>>>
>>>> void wxPLplotstream::Create
>>>>
>>>> comment the call to
>>>>
>>>> //init();
>>>>
>>>> then in our app code , do the init() call after Create() . as
>>>>
>>>> ~~~
>>>> bool wxAppPlot::OnInit()
>>>> {
>>>> wxPLplotwindow<wxFrame> *frame = new wxPLplotwindow<wxFrame>();
>>>> frame->Create(NULL, wxID_ANY, wxT("wxPLplot"),
>>>> wxDefaultPosition,
>>>> wxSize(900, 700));
>>>> frame->Show();
>>>>
>>>> //set background color (0) to white RGB(255,255,255)
>>>> //must be called before plinit()
>>>> plscolbg(255, 255, 255);
>>>>
>>>> wxPLplotstream* pls = frame->GetStream();
>>>> pls->init();
>>>>
>>>> //change color (0) to black RGB(0, 0, 0)
>>>> //must be called after plinit()
>>>> plscol0(0, 0, 0, 0);
>>>>
>>>> Plot(frame);
>>>> return true;
>>>> }
>>>> ~~~
>>>>
>>>>
>>>> since it seems the only way to modiy the background color is to do the
>>>> above
>>>> sequence
>>>> this is a change that I recommend to be included in the libray, since I
>>>> believe the other drivers require a call to init() too, but not the
>>>> wxWidgets driver.
>>>>
>>>> 2) not modifying the source code. In this case , I think it should be
>>>> possible to derive 2 classes ,
>>>> a) one from wxPLplotwindow
>>>> b) other from wxPLplotwindow
>>>>
>>>> then do everything in those classes as now except the call to init()
>>>>
>>>>
>>>> but if the developers could do option 1) that probably would be the best
>>>> thanks
>>>>
>>>>
>>>> -Pedro
>>>>
>>>>
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: Pedro Vicente
>>>> To: plplot-gene...@lists.sourceforge.net
>>>> Sent: Wednesday, October 05, 2016 6:42 PM
>>>> Subject: [Plplot-general] wxWidgets driver -- change the default
>>>> blackbackground
>>>>
>>>> Hi
>>>>
>>>>
>>>> I am trying to change the default black background color using the
>>>> wxWidgets
>>>> driver
>>>>
>>>> If using the SVG driver this can be done as explained here
>>>>
>>>> https://sourceforge.net/p/plplot/mailman/message/2817799/
>>>>
>>>> the trick being calling
>>>>
>>>> plscolbg()
>>>>
>>>> before
>>>>
>>>> plinit();
>>>>
>>>> like the sample code below marked "SVG Driver" does
>>>>
>>>>
>>>> However for the wxWidegts driver , it seems we do not do a call to
>>>>
>>>> plinit();
>>>>
>>>> but rather this is done inside the C++ stream initialization
>>>>
>>>> From the wxWidgets PLplot sample below
>>>>
>>>> the
>>>>
>>>> plinit();
>>>>
>>>> is made inside
>>>>
>>>>
>>>>
>>>> frame->Create(NULL, wxID_ANY, wxT("wxPLplot"));
>>>>
>>>>
>>>> so I don't find a way to call the plscolbg() function before
>>>>
>>>>
>>>> How can this be accomplished ?
>>>>
>>>>
>>>>
>>>>
>>>> I also tried to modify the default colors of the default palette
>>>>
>>>> cmap0_default.pal
>>>>
>>>> 16
>>>> #000000
>>>>
>>>> so that the first is white
>>>>
>>>> this does work *but* only after the window is redrawn (it first shows
>>>> the
>>>> default red on black);
>>>> this seems like a bug to me
>>>>
>>>>
>>>> Also, what's the call to increase the font size?
>>>> On the wxWidgets driver the font looks tiny
>>>>
>>>> Thanks !
>>>>
>>>>
>>>> Sample code wxWidgets
>>>>
>>>>
>>>>
>>>> bool
>>>>
>>>> wxAppPlot::OnInit()
>>>>
>>>> {
>>>>
>>>> wxPLplotwindow<wxFrame> *frame = new wxPLplotwindow<wxFrame>();
>>>>
>>>> frame->Create(
>>>>
>>>> NULL, wxID_ANY, wxT("wxPLplot"));
>>>>
>>>> frame->Show();
>>>>
>>>> Plot(frame);
>>>>
>>>> return true;
>>>>
>>>> }
>>>>
>>>>
>>>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>>>>
>>>> //Plot
>>>>
>>>>
>>>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>>>>
>>>> template
>>>>
>>>> < class WXWINDOW >
>>>>
>>>> void
>>>>
>>>> Plot(wxPLplotwindow<WXWINDOW> *plotwindow)
>>>>
>>>> {
>>>>
>>>> wxPLplotstream* pls = plotwindow->GetStream();
>>>>
>>>> //render
>>>>
>>>> plotwindow->RenewPlot();
>>>>
>>>> }
>>>>
>>>>
>>>>
>>>>
>>>> Sample code SVG driver
>>>>
>>>> void
>>>>
>>>> atms_dwell_granu_t::plot()
>>>>
>>>> {
>>>>
>>>> //set SVG device and output file name
>>>>
>>>> plsdev("svg");
>>>>
>>>> plsfnam("atms_dwell_granu.svg");
>>>>
>>>> //set background color (0) to white RGB(255,255,255)
>>>>
>>>> //must be called before plinit()
>>>>
>>>> plscolbg(255, 255, 255);
>>>>
>>>> //initialize plplot
>>>>
>>>> plinit();
>>>>
>>>> //change color (0) to black RGB(0, 0, 0)
>>>>
>>>> //must be called after plinit()
>>>>
>>>> plscol0(0, 0, 0, 0);
>>>>
>>>>
>>>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>>>>
>>>> //render
>>>>
>>>>
>>>> /////////////////////////////////////////////////////////////////////////////////////////////////////
>>>>
>>>> PLFLT xmin, xmax, ymin, ymax;
>>>>
>>>> PLFLT *x, *y;
>>>>
>>>> const int NSIZE = iOrbit_all;
>>>>
>>>> xmin = 0;
>>>>
>>>> xmax = NSIZE;
>>>>
>>>> ymin = -1.0;
>>>>
>>>> ymax = 6.0;
>>>>
>>>> x =
>>>>
>>>> new PLFLT[NSIZE];
>>>>
>>>> y =
>>>>
>>>> new PLFLT[NSIZE];
>>>>
>>>> plcol0(0);
>>>>
>>>> plenv(xmin, xmax, ymin, ymax, 0, 0);
>>>>
>>>> pllab("", "Current (Amps)", "Scan Drive Main Motor Current");
>>>>
>>>> //time axis
>>>>
>>>> for (int idx_orb = 0; idx_orb < NSIZE; idx_orb++)
>>>>
>>>> {
>>>>
>>>> x[idx_orb] = idx_orb;
>>>>
>>>> }
>>>>
>>>> //mean
>>>>
>>>> for (int idx_orb = 0; idx_orb < NSIZE; idx_orb++)
>>>>
>>>> {
>>>>
>>>> y[idx_orb] = DWELL_SAMPLE_APID517_Orbit[0][TLM_NUM_ORBIT - 1][idx_orb];
>>>>
>>>> }
>>>>
>>>> plpoin(NSIZE, x, y, 46);
>>>>
>>>> plend();
>>>>
>>>> delete[] x;
>>>>
>>>> delete[] y;
>>>>
>>>> }
>>>>
>>>> ________________________________
>>>>
>>>>
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>>>
>>
>>
>>
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