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/* Copyright 1989 GROUPE BULL -- See license conditions in file COPYRIGHT
* Copyright 1989 Massachusetts Institute of Technology
*/
/***********************\
* *
* WOOL_OBJECT: Label *
* BODY *
* *
\***********************/
#include "EXTERN.h"
#include <stdio.h>
#include "wool.h"
#include "wl_string.h"
#include "wl_atom.h"
#include "wl_number.h"
#include "gwm.h"
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include "INTERN.h"
#include "wl_label.h"
WOOL_OBJECT
wool_label_make(argc, argv)
int argc;
WOOL_Number argv[];
{
WOOL_Label object;
if (argc == 0 || argc > 2)
return wool_error(BAD_NUMBER_OF_ARGS, argc);
must_be_string(argv[0], 0);
object = (WOOL_Label) Malloc(sizeof(struct _WOOL_Label));
zrt_put(object);
object -> type = WLLabel;
object -> color = Context -> pixel.Fore;
increase_reference(object -> label = (WOOL_String) argv[0]);
if (argc == 2) {
must_be_number(argv[1], 1);
object -> font = argv[1] -> number;
} else
object -> font = DefaultFont;
return (WOOL_OBJECT) object;
}
/*
* WLLabel_print:
* a label prints as [fontnum]"string"
*/
WOOL_OBJECT
WLLabel_print(obj)
WOOL_Label obj;
{
wool_printf("{LABEL %ld,", obj -> font);
wool_printf(" %s}", obj -> label);
return (WOOL_OBJECT) obj;
}
/*
* WLLabel_free:
* The structure is just freed, and string released.
*/
WOOL_OBJECT
WLLabel_free(obj)
WOOL_Label obj;
{
decrease_reference(obj -> label);
Free(obj);
return NULL;
}
/*
* handles its label as an C string.
*/
char *
WLLabel_get_C_value(obj)
WOOL_Label obj;
{
return (char *) obj->label->string;
}
/*
* returns the dimensions of the strings in the font + margins
* x,y is the start of the string (baseline) in the box.
*/
WOOL_OBJECT
WLLabel_get_dimensions(label, box)
WOOL_Label label;
Box box; /* RETURN the dimensions */
{
int up, down, dir;
XCharStruct extent;
XQueryTextExtents(dpy, label -> font,
label -> label -> string, strlen(label -> label -> string),
&dir, &up, &down, &extent);
label -> x = DefaultLabelHorizontalMargin - extent.lbearing;
label -> y = DefaultLabelVerticalMargin + up;
box -> x = box -> y = 0;
box -> width = Max(1, extent.width + 2 * DefaultLabelHorizontalMargin);
box -> height = Max(1, up + down + 2 * DefaultLabelVerticalMargin);
return NULL;
}
/*
* drawing a string: we don't need to refresh the background since
* the font occupies all the space
*/
WOOL_OBJECT
WLLabel_draw(label, wob)
WOOL_Label label;
Wob wob;
{
XSetFont(dpy, Context->gc.Work, label -> font);
XSetForeground(dpy, Context->gc.Work, label -> color);
XClearWindow(dpy, wob -> hook);
XDrawString(dpy, wob -> hook, Context->gc.Work,
label -> x, label -> y, label -> label -> string,
strlen(label -> label -> string));
return NULL;
}
WOOL_OBJECT
WLLabel_open(label, wob)
WOOL_Label label;
Wob wob;
{
XSetWindowBackground(dpy, wob -> hook, wob ->box.background);
XClearWindow(dpy, wob -> hook);
return (WOOL_OBJECT) ExposureMask;
}
/* since this module has the "know-how" (and the good includes), we define
* this method for strings here
*/
WOOL_OBJECT
WLString_get_dimensions(string, box)
WOOL_String string;
Box box; /* RETURN the dimensions */
{
int up, down, dir, wdt;
XCharStruct extent;
if (!strlen(string -> string)) {
XQueryTextExtents(dpy, DefaultFont,
" ", 1,
&dir, &up, &down, &extent);
wdt = 0;
} else {
XQueryTextExtents(dpy, DefaultFont,
string -> string, strlen(string -> string),
&dir, &up, &down, &extent);
wdt = extent.width;
}
box -> x = box -> y = 0;
box -> width = Max(1, wdt + 2 * DefaultLabelHorizontalMargin);
box -> height = Max(1, up + down + 2 * DefaultLabelVerticalMargin);
return NULL;
}
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