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- /*
- ** xgc
- **
- ** text.c
- **
- ** How to make a text widget that returns a string when the cursor
- ** leaves its window.
- */
-
- #include <stdio.h>
- #include <X11/Intrinsic.h>
- #include <X11/StringDefs.h>
- #include <X11/Xaw/Form.h>
- #include <X11/Xaw/Label.h>
- #include <X11/Xaw/AsciiText.h>
- #include "xgc.h"
-
- static void WriteText();
- extern void interpret();
-
- extern XStuff X;
- extern XtAppContext appcontext;
-
- /* the strings which are displayed on the screen, edited, and sent
- to interpret() */
- static char textstrings[NUMTEXTWIDGETS][80];
-
- static char oldtextstrings[NUMTEXTWIDGETS][80];
-
- static char *defaultstrings[NUMTEXTWIDGETS] = {"0","6x10","0","1"};
-
- /* The labels displayed next to them */
- static char *labels[NUMTEXTWIDGETS] = {"Line Width","Font","Foreground",
- "Background"};
-
- /* the first half of what gets sent to interpret() */
- static char *names[NUMTEXTWIDGETS] = {"linewidth ","font ","foreground ",
- "background "};
-
- /* create_text_choice(w,type,length,width)
- ** ---------------------------------------
- ** Inside w (a form), creates an editable text widget of width width. The
- ** user can enter a string of up to length characters. type is one of
- ** the constants defined in xgc.h; it decides things like the label,
- ** what string will be displayed and edited, etc. When the pointer leaves
- ** the widget, the widget does the appropriate thing with the text
- ** inside it; the user doesn't have to press an "enter" button or anything.
- ** Returns the text widget which the user will edit.
- */
-
- Widget
- create_text_choice(w,type,length,width)
- Widget w;
- int type;
- int length, width;
- {
- char translationtable[600]; /* for adding the new action (calling
- WriteText() when the pointer leaves) */
-
- static XtActionsRec actionTable[] = { /* likewise */
- {"WriteText", WriteText},
- {"Nothing", NULL}
- };
-
- static Arg labelargs[] = {
- {XtNborderWidth, (XtArgVal) 0},
- {XtNjustify, (XtArgVal) XtJustifyRight}
- };
-
- static Arg textargs[] = {
- {XtNeditType, (XtArgVal) XawtextEdit},
- {XtNstring, (XtArgVal) NULL},
- {XtNlength, (XtArgVal) NULL},
- {XtNwidth, (XtArgVal) NULL},
- {XtNhorizDistance, (XtArgVal) 10},
- {XtNfromHoriz, (XtArgVal) NULL},
- {XtNinsertPosition, (XtArgVal) NULL},
- {XtNuseStringInPlace, (XtArgVal) True}
- };
-
- static Widget text; /* the text widget */
- static Widget label; /* the label widget */
-
- /* Disable keys which would cause the cursor to go off the single
- ** line that we want to display. If the pointer leaves the window,
- ** update the GC accordingly. The integer passed to WriteText is
- ** so it knows what type of widget was just updated. */
-
- sprintf(translationtable,
- "<Leave>: WriteText(%d)\n\
- Ctrl<Key>J: Nothing()\n\
- Ctrl<Key>M: Nothing()\n\
- <Key>Linefeed: Nothing()\n\
- <Key>Return: Nothing()\n\
- Ctrl<Key>O: Nothing()\n\
- Meta<Key>I: Nothing()\n\
- Ctrl<Key>N: Nothing()\n\
- Ctrl<Key>P: Nothing()\n\
- Ctrl<Key>Z: Nothing()\n\
- Meta<Key>Z: Nothing()\n\
- Ctrl<Key>V: Nothing()\n\
- Meta<Key>V: Nothing()",type);
-
- /* label uses type to find out what its title is */
- label = XtCreateManagedWidget(labels[type],labelWidgetClass,w,
- labelargs,XtNumber(labelargs));
-
- /* text uses type to find out what its string is */
- switch (type) {
- case TForeground:
- sprintf(textstrings[type],"%d",(int) X.gcv.foreground);
- sprintf(oldtextstrings[type],"%d",(int) X.gcv.foreground);
- break;
- case TBackground:
- sprintf(textstrings[type],"%d",(int) X.gcv.background);
- sprintf(oldtextstrings[type],"%d",(int) X.gcv.background);
- break;
- default:
- strcpy(textstrings[type],defaultstrings[type]);
- strcpy(oldtextstrings[type],defaultstrings[type]);
- }
- textargs[1].value = (XtArgVal) textstrings[type];
- textargs[2].value = (XtArgVal) length;
- textargs[3].value = (XtArgVal) width;
- textargs[5].value = (XtArgVal) label;
- textargs[6].value = (XtArgVal) strlen(textstrings[type]);
-
- text = XtCreateManagedWidget("text", asciiTextWidgetClass,w,
- textargs,XtNumber(textargs));
-
- /* Register the actions and translations */
-
- XtAppAddActions(appcontext,actionTable,XtNumber(actionTable));
- XtOverrideTranslations(text,XtParseTranslationTable(translationtable));
-
- return(text);
- }
-
- /* WriteText(w,event,params,num_params)
- ** ------------------------------------
- ** Makes an appropriate string and sends it off to interpret().
- ** It's an ActionProc, thus the funny arguments.
- */
-
- /*ARGSUSED*/
- static void
- WriteText(w,event,params,num_params)
- Widget w;
- XEvent *event;
- String *params; /* the type is in here */
- int *num_params;
- {
- char mbuf[80];
- int type; /* which string # to send */
-
- type = atoi(params[0]);
- if (strcmp(textstrings[type],oldtextstrings[type])) {
- strcpy(oldtextstrings[type],textstrings[type]);
- sprintf(mbuf,names[type]); /* the right first half */
- strcat(mbuf,textstrings[type]); /* the right second half */
- strcat(mbuf,"\n"); /* the right newline */
- interpret(mbuf); /* send it off */
- }
- }
-
- /* change_text(w,type,newtext)
- ** ------------------------
- ** Changes the text in the text widget w of type type to newtext.
- */
-
- void
- change_text(w,newtext)
- Widget w;
- String newtext;
- {
- XawTextBlock text; /* the new text */
- XawTextPosition first, last; /* boundaries of the old text */
- String oldtext; /* the old text */
-
- static Arg textargs[] = {
- {XtNstring, NULL}
- };
-
- /* Initialize the XawTextBlock. */
-
- if (!newtext)
- newtext = "";
- text.firstPos = 0;
- text.length = strlen(newtext);
- text.ptr = newtext;
- text.format = FMT8BIT;
-
- /* Find the old text, so we can get its length, so we know how
- ** much of it to update. */
-
- textargs[0].value = (XtArgVal) &oldtext;
- XtGetValues(w,textargs,XtNumber(textargs));
- first = XawTextTopPosition(w);
- if (!oldtext)
- oldtext = "";
- last = (XawTextPosition) strlen(oldtext)+1;
-
- /* Replace it with the new text. */
-
- XawTextReplace(w, first, last, &text);
- }
-
-