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/* X11choice - choice items for X11 dialogs */
/* XLISP-STAT 2.1 Copyright (c) 1990, by Luke Tierney */
/* Additions to Xlisp 2.1, Copyright (c) 1989 by David Michael Betz */
/* You may give out copies of this software; for conditions see the */
/* file COPYING included with this distribution. */
/***********************************************************************/
/** **/
/** General Includes and Definitions **/
/** **/
/***********************************************************************/
#include "dialogs.h"
extern Display *StX11Display();
extern Point DialogStringSize();
extern LVAL StX11ItemObject();
extern char *checkstring();
extern LVAL s_window_id;
typedef struct {
unsigned long fore, back;
} ColorPair;
/* layout defines */
# define CHOICE_PAD 20
# define CHOICE_MARK_HEIGHT 16
# define CHOICE_LEAD 5
/***********************************************************************/
/** **/
/** Global Variables **/
/** **/
/***********************************************************************/
/* configuration parameters - should be set using the defaults database */
extern XFontStruct *DialogFont;
extern unsigned long DialogBorderColor;
extern ColorPair DialogC;
extern unsigned int dialog_border_width;
extern int min_choice_height;
extern GC DialogGC, DialogRGC;
extern XContext ObjectContext;
extern Pixmap ChoiceOffPM, ChoiceOnPM;
/***********************************************************************/
/** **/
/** Choice Items **/
/** **/
/***********************************************************************/
static VOID draw_choice(dpy, win, item)
Display *dpy;
Window win;
LVAL item;
{
LVAL text, val;
char *text_item;
int x, y, len, ascent, descent, value, i, step;
Pixmap mark;
ascent = DialogFont->max_bounds.ascent;
descent = DialogFont->max_bounds.descent;
text = slot_value(item, s_text);
val = slot_value(item, s_value);
value = (fixp(val)) ? getfixnum(val) : 0;
x = CHOICE_PAD;
step = descent + max(CHOICE_MARK_HEIGHT, ascent) + CHOICE_LEAD;
for (i = 0, y = max(ascent, CHOICE_MARK_HEIGHT);
consp(text);
i++, y += step, text = cdr(text)) {
mark = (value == i) ? ChoiceOnPM : ChoiceOffPM;
text_item = checkstring(car(text));
XCopyPlane(dpy, mark, win, DialogGC,
0, 0, CHOICE_MARK_HEIGHT, CHOICE_MARK_HEIGHT,
0, y - CHOICE_MARK_HEIGHT, 1);
len = strlen(text_item);
XDrawString(dpy, win, DialogGC, x, y, text_item, len);
}
}
static LVAL choice_handler(report, modal)
XEvent report;
int modal;
{
Display *dpy = StX11Display();
Window win;
LVAL item, result = NIL;
int i, item_height, ascent, descent;
ascent = DialogFont->max_bounds.ascent;
descent = DialogFont->max_bounds.descent;
win = report.xany.window;
item = StX11ItemObject(dpy, win);
if (item != NIL) {
switch (report.type) {
case Expose:
draw_choice(dpy, win, item);
break;
case ButtonPress:
item_height = descent + max(CHOICE_MARK_HEIGHT, ascent) + CHOICE_LEAD;
i = report.xbutton.y / item_height;
DialogChoiceItemValue(item, TRUE, i);
if (! modal) send_message(item, sk_do_action);
break;
case ButtonRelease:
break;
default:
break;
}
}
return(result);
}
VOID InstallChoiceItem(win, item)
Window win;
LVAL item;
{
Display *dpy = StX11Display();
Point loc, size;
Window choice;
loc = ListToPoint(slot_value(item, s_location));
size = ListToPoint(slot_value(item, s_size));
choice = XCreateSimpleWindow(dpy, win, loc.h, loc.v, size.h, size.v,
0, DialogBorderColor, DialogC.back);
XSelectInput(dpy, choice,
ExposureMask | ButtonPressMask | ButtonReleaseMask);
set_slot_value(item, s_window_id, cvfixnum((FIXTYPE) choice));
if (! fixp(slot_value(item, s_value)))
set_slot_value(item, s_value, cvfixnum((FIXTYPE) 0));
install_dialog_item_handler(dpy, choice, choice_handler, item);
if (XSaveContext(dpy, choice, ObjectContext, (caddr_t) item) != 0)
xlfail("could not install object in window");
}
VOID DeleteChoiceItem(win, item)
Window win;
LVAL item;
{
Display *dpy = StX11Display();
Window choice;
choice = (Window) getfixnum(slot_value(item, s_window_id));
delete_dialog_item_handler(dpy, choice);
if (XDeleteContext(dpy, choice, ObjectContext) != 0)
xlfail("could not delete object context");
set_slot_value(item, s_window_id, NIL);
}
VOID DialogChoiceGetDefaultSize(item, width, height)
LVAL item;
int *width, *height;
{
Point i_sz, s_sz;
LVAL text = slot_value(item, s_text);
for (i_sz.h = 0, i_sz.v = 0; consp(text); text = cdr(text)) {
s_sz = DialogStringSize(getstring(car(text)));
if (i_sz.v != 0) i_sz.v += CHOICE_LEAD; /* only add lead between lines */
i_sz.v += max(s_sz.v, min_choice_height);
i_sz.h = max(i_sz.h, s_sz.h);
}
if (width != NULL) *width = i_sz.h + CHOICE_PAD;
if (height != NULL) *height = i_sz.v;
}
LVAL DialogChoiceItemValue(item, set, value)
LVAL item;
int set, value;
{
Display *dpy = StX11Display();
LVAL win_id, text;
int n;
if (set) {
text = slot_value(item, s_text);
n = (consp(text)) ? llength(text) : 0;
value = max(0, min(value, n - 1));
set_slot_value(item, s_value, cvfixnum((FIXTYPE) value));
win_id = slot_value(item, s_window_id);
if (fixp(win_id)) draw_choice(dpy, (Window) getfixnum(win_id), item);
}
return(slot_value(item, s_value));
}
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