run.c

This is the function that handles our graph object for display. It is a typical callback as previously explained. Note we begin as usual by doing appropriate casts and grabbing important information from the application_data structure via the use of T.

#include "simulation.h"

void run(Widget w,XtPointer client_data,XtPointer call_data)
{
  XmPushButtonCallbackStruct *P = (XmPushButtonCallbackStruct *)call_data;
  application_data *T = (application_data *)client_data;
  
  Display *display = T->display;
  Drawable drawable = T->drawable;
  Pixmap pixmap1 = T->pixmap;
  Pixmap pixmap2 = T->pixmap2;
  GC gc = T->gc;
  
  Pixel graph_colors[4];
  for(int i=0;i<4;++i)
    graph_colors[i] = T->pParts[i]->pixel;

Next, we construct the graph object:

  if(T->T==NULL){
    printf("Building the XGraph object.\n");
    T->T = new Graph(T->radius,T->center,        //node circle
                     T->separation,
                     T->foreground,              //fg
                     T->background,              //bg
                     graph_colors,               //graph colors
                     T->display,                 //graphics
                     T->drawable,
                     T->pixmap,
                     T->pixmap2,
                     T->gc);
    }

Now we decide how many nodes and edges and construct a random graph of that size, save it to a file and then read it in.

  printf("Graph Object Constructed\n");
  cout << "Checking Random Graph Generation" << endl;
  T->T->GenerateRandomGraph("RandomGraph");         
  cout << "Checking file read method" << endl;   
  T->T->ReadInputFile("RandomGraph");

Then we initialize all the pixmaps and draw the graph object.

                        
  //initialize pixmaps and compute image
  T->T->erase(T->pixmap);
  T->T->draw(T->pixmap);
  T->T->erase(T->pixmap2);
  T->T->draw(T->pixmap2);
  image(w,T);
}