Example of Using the Data-Typing Database

This section contains example code of how to use data typing. You can find this example code in /usr/dt/examples/dtdts/datatyping.c. The example code displays the data type, icon name, and supported actions for each file passed to it. You can then use the dtaction client to run a supported action on the file. The usage for datatyping is:

datatyping file1 [file2 ...] 
#include <Xm/Form.h> 
#include <Xm/Text.h> 
#include <Dt/Dts.h> 

#define ApplicationClass "DtDatatyping"  
static Widget text;  
static void DisplayTypeInfo(int, char**);  

int main(int argc, char **argv) 
{
     XtAppContext appContext;
     Widget toplevel, form;
     Arg args[20];
     int n;
     toplevel = XtAppInitialize(&appContext, ApplicationClass,
 	  NULL, 0,
         argc, argv, NULL, NULL, 0);

     if (argc == 1) {
         printf("%s: No files specified.\n", argv[0]);
         exit(1);
     }

     form = XmCreateForm(toplevel, "form", NULL, 0);
     XtManageChild(form);
     n = 0;
     XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
     XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
     XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); n++;
     XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); n++;
     XtSetArg(args[n], XmNeditable, False); n++;
     XtSetArg(args[n], XmNeditMode, XmMULTI_LINE_EDIT); n++;
     XtSetArg(args[n], XmNrows, 25); n++;
     XtSetArg(args[n], XmNcolumns, 90); n++;
     text = XmCreateScrolledText(form, "text", args, n);
     XtManageChild(text);

     XtRealizeWidget(toplevel);
 	  if (DtAppInitialize(appContext, XtDisplay(toplevel), toplevel, argv[0],
                                                 ApplicationClass) == False) {
         printf("%s: Couldn't initialize Dt\n", argv[0]);
         exit(1);
     }

     DtDbLoad();

     DisplayTypeInfo(argc, argv); 

     XtAppMainLoop(appContext); 
}  

static void DisplayTypeInfo(int argc, char **argv) 
{
     char *file;
     char *datatype;
     char *icon;
     char *actions;
     char str[100];
     int i;

     sprintf(str, "%-30s\t%-10s\t%-8s\t%-20s\n",
                 "File",
                 "DataType",
                 "Icon",
                 "Actions");
     XmTextInsert(text, XmTextGetLastPosition(text), str);

     sprintf(str, "%-30s\t%-10s\t%-8s\t%-20s\n",
                 "-------------------",
                 "--------",
                 "----",
                 "-------");
     XmTextInsert(text, XmTextGetLastPosition(text), str);

      for(i=1; i < argc; i++) {
         char *file = argv[i];

         /* find out the Dts data type */
         datatype = DtDtsFileToDataType(file);

         if(datatype) {
             /* find the icon attribute for the data type */
             icon = DtDtsDataTypeToAttributeValue(datatype,
				 		 DtDTS_DA_ICON, file);
         }

  	 /*  Directly find the action attribute for a file */

          actions = DtDtsFileToAttributeValue(file,
 			 DtDTS_DA_ACTION_LIST);
          sprintf(str, "%-30s\t%-10s\t%-8s\t%s\n",
                         file,
                         datatype?datatype:"unknown",
                        icon?icon:"unknown",
                         actions?actions:"unknown");
         XmTextInsert(text, XmTextGetLastPosition(text), str);

         /* Free the space allocated by Dts */

         DtDtsFreeAttributeValue(icon);
         DtDtsFreeAttributeValue(actions);
         DtDtsFreeDataType(datatype);     
}