/* +-------------------------------------------------------------------+ */
/* | Copyright 1993, David Koblas (koblas@netcom.com)                  | */
/* |                                                                   | */
/* | Permission to use, copy, modify, and to distribute this software  | */
/* | and its documentation for any purpose is hereby granted without   | */
/* | fee, provided that the above copyright notice appear in all       | */
/* | copies and that both that copyright notice and this permission    | */
/* | notice appear in supporting documentation.  There is no           | */
/* | representations about the suitability of this software for        | */
/* | any purpose.  this software is provided "as is" without express   | */
/* | or implied warranty.                                              | */
/* |                                                                   | */
/* +-------------------------------------------------------------------+ */

#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
#include <X11/Xaw/Form.h>
#include <X11/Xaw/Command.h>
#include "misc.h"
#include "palette.h"

typedef struct {
	XtCallbackProc	okProc;
	XtPointer	closure;
	Widget		wIn;

	Widget		shell, pick;
	Palette		*map;
	Boolean		allowWrite;
	XColor		origColor;
} LocalInfo;

static void commonCB(LocalInfo *info, XColor *col)
{
	Widget		cw = info->wIn;
	XtCallbackProc	proc = info->okProc;
	XtPointer	closure = info->closure;

	XtDestroyWidget(info->shell);
	XtFree((XtPointer)info);

	proc(cw, closure, (XtPointer)col);
}

static void changeBgCancel(Widget w, LocalInfo *info, XtPointer junk2)
{
	if (info->allowWrite) 
		PaletteSetPixel(info->map, ColorPickerGetPixel(info->pick), 
					&info->origColor);
	commonCB(info, NULL);
}
static void changeBgOk(Widget w, LocalInfo *info, XtPointer junk2)
{
	XColor		xcol;

	xcol = *ColorPickerGetXColor(info->pick);

	commonCB(info, &xcol);
}

void ColorEditor(Widget w, Pixel pixel, Palette *map, Boolean allowWrite,
			XtCallbackProc okProc, XtPointer closure)
{
	extern Widget	ColorPickerPalette(Widget, Palette *, Pixel *);
	Position	x, y;
	Widget		shell, form, ok, cancel, pick;
	Pixel		pix, bg;
	LocalInfo	*info = XtNew(LocalInfo);

	info->okProc     = okProc;
	info->closure    = closure;
	info->wIn        = w;
	info->allowWrite = allowWrite;

	XtVaGetValues(GetShell(w), XtNx, &x, XtNy, &y, NULL);

	shell = XtVaCreatePopupShell("colorEditDialog", transientShellWidgetClass, GetShell(w),
				XtNx, x + 24,
				XtNy, y + 24,
				XtNcolormap, map->cmap,
				NULL);
	PaletteAddUser(map, shell);

	form  = XtVaCreateManagedWidget("form", formWidgetClass, shell, 
			NULL);

	if (allowWrite) {
		pix = pixel;
	} else {
		pix = PaletteGetUnused(map);
	}
	pick = ColorPickerPalette(form, map, &pix);
	info->origColor = *PaletteLookup(map, pixel);
	ColorPickerSetXColor(pick, &info->origColor);

	ok = XtVaCreateManagedWidget("ok", 
				commandWidgetClass, form,
				XtNfromVert, pick,
				XtNtop, XtChainBottom,
				XtNbottom, XtChainBottom,
				XtNleft, XtChainLeft,
				XtNright, XtChainLeft,
				NULL);

	cancel = XtVaCreateManagedWidget("cancel", 
				commandWidgetClass, form,
				XtNfromVert, pick,
				XtNfromHoriz, ok,
				XtNtop, XtChainBottom,
				XtNbottom, XtChainBottom,
				XtNleft, XtChainLeft,
				XtNright, XtChainLeft,
				NULL);
	XtAddCallback(cancel, XtNcallback, (XtCallbackProc)changeBgCancel, (XtPointer)info);
	XtAddCallback(ok, XtNcallback, (XtCallbackProc)changeBgOk, (XtPointer)info);
        AddDestroyCallback(shell, (void (*)(Widget, void *, XEvent *))changeBgCancel, (XtPointer)info);

	info->shell = shell;
	info->pick  = pick;
	info->map   = map;

	XtPopup(shell, XtGrabNone);
}