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);
    }

Example of Using the Data-Typing Database

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