long
plot_canvas::on_cmd_paint(FXObject *, FXSelector, void *ptr)
{
FXEvent* ev = (FXEvent*) ptr;
draw_plot(dirty() ? NULL : ev);
return 1;
}
long
plot_canvas::on_update(FXObject *, FXSelector, void *)
{
if (m_dirty_flag)
{
draw_plot(NULL);
return 1;
}
return 0;
}
UiApi::Status UserInterface::execute_line(const string& str)
{
UiApi::Status status = UiApi::kStatusOk;
try {
cmd_executor_->raw_execute_line(str);
}
catch (SyntaxError &e) {
warn(string("Syntax error: ") + e.what());
status = UiApi::kStatusSyntaxError;
}
// ExecuteError and xylib::FormatError and xylib::RunTimeError
// are derived from std::runtime_error
catch (runtime_error &e) {
warn(string("Error: ") + e.what());
status = UiApi::kStatusExecuteError;
}
if (dirty_plot_ && ctx_->get_settings()->autoplot)
draw_plot(UiApi::kRepaint);
return status;
}
void draw_tangent(void *obj, void *data)
{
function_t *func = (function_t *)obj;
bundled_info_t *bit = (bundled_info_t *)data;
window_info_t *winfo = bit->winfo;
int loc = bit->x;
SDL_Surface *screen = bit->screen;
plot_info_t info = bit->info;
if(loc == winfo->width - 1 || loc == 0)
return;
if(!func->show_tan)
return;
function_t tangent = emptyFunction();
tangent.plot_col = func->plot_col;
double vals[winfo->width];
double slope_right = (func->vals[loc + 1] - func->vals[loc]);
double slope_left = (func->vals[loc] - func->vals[loc - 1]);
double slope = (slope_right + slope_left) / 2;
tangent.vals = vals;
tangent.vals[loc] = func->vals[loc];
int i;
for(i = loc; i < winfo->width - 1; i++)
tangent.vals[i + 1] = tangent.vals[i] + slope;
for(i = loc; i > 0; i--)
tangent.vals[i - 1] = tangent.vals[i] - slope;
draw_plot((voidptr)&tangent, data);
}
/*
* Main program.
*/
int main()
{
int appid,rlist;
int xwork_id,text_id,box_id,data_id;
int dataspec;
int i;
char text[6];
float xdra[] = {0.0, 0.1, 0.5, 0.9, 1.0, 0.9, 0.5, 0.1, 0.0};
float ydra[] = {0.5, 0.9, 1.0, 0.9, 0.5, 0.1, 0.0, 0.1, 0.5};
float xpos,ypos;
/*
* Define a simple color map (index 0 defines the background color).
*/
float cmap[4][3] = { { 1.0, 1.0, 1.0 },
{ 0.0, 0.0, 1.0 },
{ 0.0, 1.0, 0.0 },
{ 1.0, 0.0, 0.0 } };
ng_size_t dims[] = {4,3};
/*
* Set the display. Default is to display output to an X workstation.
*/
char const *wks_type = "x11";
/*
* Initialize the high level utility library and create application.
*/
NhlInitialize();
rlist = NhlRLCreate(NhlSETRL);
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNappUsrDir,"./");
NhlCreate(&appid,"basic06",NhlappClass,NhlDEFAULT_APP,rlist);
if (!strcmp(wks_type,"ncgm") || !strcmp(wks_type,"NCGM")) {
/*
* Create a meta file workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkMetaName,"./basic06c.ncgm");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,dims);
NhlCreate(&xwork_id,"simple",NhlncgmWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"x11") || !strcmp(wks_type,"X11")) {
/*
* Create an X workstation.
*/
NhlRLClear(rlist);
NhlRLSetInteger(rlist,NhlNwkPause,True);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,dims);
NhlCreate(&xwork_id,"simple",NhlcairoWindowWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"oldps") || !strcmp(wks_type,"OLDPS")) {
/*
* Create a PS file workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkPSFileName,"./basic06c.ps");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,dims);
NhlCreate(&xwork_id,"simple",NhlpsWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"oldpdf") || !strcmp(wks_type,"OLDPDF")) {
/*
* Create a PS file workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkPDFFileName,"./basic06c.pdf");
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,dims);
NhlCreate(&xwork_id,"simple",NhlpdfWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"pdf") || !strcmp(wks_type,"PDF") ||
!strcmp(wks_type,"ps") || !strcmp(wks_type,"PS")) {
/*
* Create a cairo PS/PDF workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./basic06c");
NhlRLSetString(rlist,NhlNwkFormat,(char*)wks_type);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,dims);
NhlCreate(&xwork_id,"simple",NhlcairoDocumentWorkstationClass,
NhlDEFAULT_APP,rlist);
}
else if (!strcmp(wks_type,"png") || !strcmp(wks_type,"PNG")) {
/*
* Create a cairo PNG workstation.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNwkFileName,"./basic06c");
NhlRLSetString(rlist,NhlNwkFormat,(char*)wks_type);
NhlRLSetMDFloatArray(rlist,NhlNwkColorMap,&cmap[0][0],2,dims);
NhlCreate(&xwork_id,"simple",NhlcairoImageWorkstationClass,
NhlDEFAULT_APP,rlist);
}
/*
* Create data object for an XyPlot
*/
NhlRLClear(rlist);
NhlRLSetFloatArray(rlist,NhlNcaXArray,xdra,NhlNumber(xdra));
NhlRLSetFloatArray(rlist,NhlNcaYArray,ydra,NhlNumber(ydra));
NhlCreate(&data_id,"xyData",NhlcoordArraysClass,NhlDEFAULT_APP,rlist);
/*
* Create a simple XyPlot object with no labels or borders. The
* parent for this object is xwork_id, hence it will be sent to
* the workstation identified by xwork_id when the draw procedure
* is invoked on it.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNtmXBBorderOn,"False");
NhlRLSetString(rlist,NhlNtmXTBorderOn,"False");
NhlRLSetString(rlist,NhlNtmYLBorderOn,"False");
NhlRLSetString(rlist,NhlNtmYRBorderOn,"False");
NhlRLSetString(rlist,NhlNtmXBOn,"False");
NhlRLSetString(rlist,NhlNtmXTOn,"False");
NhlRLSetString(rlist,NhlNtmYLOn,"False");
NhlRLSetString(rlist,NhlNtmYROn,"False");
NhlRLSetFloat(rlist,NhlNvpXF,0.0);
NhlRLSetFloat(rlist,NhlNvpYF,1.0);
NhlRLSetFloat(rlist,NhlNvpWidthF,1.0);
NhlRLSetFloat(rlist,NhlNvpHeightF,1.0);
NhlCreate(&box_id,"Box",NhlxyPlotClass,xwork_id,rlist);
/*
* Create a TextItem object.
*/
NhlRLClear(rlist);
NhlRLSetFloat(rlist,NhlNtxPosXF,0.5);
NhlRLSetFloat(rlist,NhlNtxPosYF,0.5);
NhlRLSetInteger(rlist,NhlNtxFont,26);
NhlCreate(&text_id,"Text",NhltextItemClass,xwork_id,rlist);
/*
* Add the data identified by data_id to the XyPlot.
*/
dataspec = NhlAddData(box_id,"xyCoordData",data_id);
/*
* Draw three labeled boxes at different sizes and in different positions
* and with different colors.
*/
for(i=1;i<=3;++i)
{
xpos = -0.05*i*i + 0.5*i - 0.20;
ypos = 1.0-xpos;
sprintf(text,"%s %d","Box",i);
/*
* Specify a text string and its color.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNtxString,text);
NhlRLSetInteger(rlist,NhlNtxFontColor,4-i);
NhlSetValues(text_id,rlist);
/*
* Set the XyPlot curve color.
*/
NhlRLClear(rlist);
NhlRLSetString(rlist,NhlNxyMonoLineColor,"True");
NhlRLSetInteger(rlist,NhlNxyLineColor,i);
NhlSetValues(dataspec,rlist);
/*
* Draw box and text.
*/
draw_plot(box_id, xpos, ypos, 0.36-0.09*(i-1));
draw_text(text_id, xpos, ypos, 0.08-0.02*(i-1));
}
NhlFrame(xwork_id);
NhlDestroy(xwork_id);
NhlClose();
exit (0);
}