Hi phil,
Thanks you to waste time on my problem.
I have try something like this
void FenetreCourbe::OnLeftDown(wxMouseEvent& event)
{
PLGraphicsIn g;
wxPLplotstream* pls = GetStream();
// pls->adv(0); uncomment this line does not change result
g.dX = event.GetX();
g.dY = event.GetY();
g.subwindow=0;
plTranslateCursor(&g);
}
g.wx, g.wy are always 0 I have used this
http://plplot.sourcearchive.com/documentation/5.9.9-1/plpage_8c_aee8b46bbe61887f2fd8dec90a7338e0d.html#aee8b46bbe61887f2fd8dec90a7338e0d.
I do not understand why I must give g.dX, g.dy and not g.pX and g.pY
All others fields of PLGraphics structure are unitialized
Le 20/12/2015 13:07, Phil Rosenberg a écrit :
> Hi Laurent
> (Alan, please see my email below - I accidentally replied to Laurent
> instead of replying to all yesterday)
>
> I've just had a look and you can use plTranslateCursor to get the
> coordinates. This function is listed as part of the API on p181 of the
> documentation, but it doesn't seem to be documented anywhere.
>
> This function isn't exposed in the C++ interface, so therefore isn't
> exposed by the wxWidgets interface. Hence I am not sure how you can
> access it unless you are using the C interface.
>
> Alan - I have just written some code to expose plTranslateCursor in
> the C++ interface and have added some code to the wxWidgets binding to
> capture mouse events and pass them back to the user easily.
>
> Are you happy for me to commit these changes?
>
> On 19 December 2015 at 21:46, Phil Rosenberg <p.d.rosenb...@gmail.com> wrote:
>> Hi Laurent
>>
>> It looks to me like you are writing a wxWidgets application yourself.
>> Is this correct? Unfortunately plGetCursor only works when you do not
>> provide your own wxDC to Plplot, in this case plplot uses wxPlViewer -
>> a separate wxWidgets executable which captures the mouse clicks and
>> reports them back to the library. It is wxPlViewer that is used when
>> you run the examples from the command line.
>>
>> If you are passing a wxDC into Plplot, plGetCursor doesn't work and
>> emits a warning, but you probably don't see the warning as it is sent
>> to stdout. In this case you must handle mouse events yourself and
>> plGetCursor will not work. You need something like
>>
>> void wxPlFrame::OnMouse( wxMouseEvent &event )
>>
>> {
>>
>> if(!event.ButtonDown())
>> return;
>> //get the mouse position
>> wxPoint cursorPosition = event.GetPosition();
>>
>> //some code to convert to plot coordinate
>> }
>>
>> Bind this function using the wxWidgets Bind() function or and event
>> table. Unfortunately the last bit, converting to plot coordinates you
>> may have to do yourself. I do not think there is a built in function
>> to do it - Alan, please correct me if this is wrong. However, if in
>> your wxWindow you remember the parameters passed into plwind then you
>> should be able to calculate the plot coordinates from the pixel values
>> returned from GetPosition().
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