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gimp/plug-ins/maze/maze.c
Elliot Lee 32cefec8f7 Initial revision
1997-11-24 22:05:25 +00:00

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/* maze.c, version 0.4.2, 17 October 1997
* This is a plug-in for the GIMP.
* It draws mazes... walls and passages are 1 pixel wide.
*
* Implemented as a GIMP 0.99 Plugin by
* Kevin Turner <kevint@poboxes.com>
* http://www.poboxes.com/kevint/gimp/maze.html
*
* mazegen code from rec.games.programmer's maze-faq:
* * maz.c - generate a maze
* *
* * algorithm posted to rec.games.programmer by jallen@ic.sunysb.edu
* * program cleaned and reorganized by mzraly@ldbvax.dnet.lotus.com
* *
* * don't make people pay for this, or I'll jump up and down and
* * yell and scream and embarass you in front of your friends...
*
* Code generously borrowed from assorted GIMP plugins
* and used as a template to get me started on this one. :)
*
* Revision history:
* 0.4.2 - Applied Adrian Likins' patch to fix non-interactive stuff.
* - -ansi and -pedantic-errors clean. Woo-hoo?
* 0.4.1 - get_colors() now works properly for grayscale images.
* I'd still like it to do indexed too, but I don't know
* if that's worth breaking a sweat over.
* - We're -Wall clean now. Woohoo!
* 0.4.0 - Code for the painting of the maze has been almost completely rebuilt.
* Hopefully it's a more sane and speedier approach.
* Utilizes a new function, drawbox, which colors a solid rectangle.
* (Good excercise, in any case.)
* - Order of paramaters changed, defaults are used if not given.
* - Discovery made that that was an utterly useless thing to do.
* 0.3.0 - Maze is centered with dead space around outside
* - Width slider works... And does stuff!
* - Allows partial mazes to be generated with "broken" multiple
* and offset values.
* 0.1.99 - Has dialog box with seed, multiple, and offset.
* 0.1.0 - First release. It works! :)
*
* TO DO:
* Add an option to kill the outer border.
*
* Fix that stray line down there between maze wall and dead space border...
*
* Make get_colors() work with indexed. * HELP! *
*
* Tileable mazes are fun :)
*
* If we add many more paramaters, we'll need a preview box.
*
* Also someday:
* Maybe make it work with irregularly shaped selections?
* Add different generation algorythms.
*
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <time.h> /* For random seeding */
#include <stdio.h>
#include <stdlib.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#define ENTRY_WIDTH 75
#define MAZE_TITLE "Maze 0.4.2"
/* entscale stuff begin */
#define ENTSCALE_INT_SCALE_WIDTH 125
#define ENTSCALE_INT_ENTRY_WIDTH 40
/* entscale stuff end */
typedef struct {
gint width;
gint seed;
gint multiple;
gint offset;
} MazeValues;
typedef struct {
gint run;
} MazeInterface;
/* entscale stuff begin */
typedef void (*EntscaleIntCallbackFunc) (gint value, gpointer data);
typedef struct {
GtkObject *adjustment;
GtkWidget *entry;
gint constraint;
EntscaleIntCallbackFunc callback;
gpointer call_data;
} EntscaleIntData;
/* entscale stuff end */
static void query (void);
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals);
static void maze (GDrawable * drawable);
static gint mazegen(gint pos,
gchar *maz,
gint x,
gint y,
gint rnd);
static void get_colors (GDrawable * drawable,
guint8 *fg,
guint8 *bg);
static void drawbox (GPixelRgn *dest_rgn,
guint x,
guint y,
guint w,
guint h,
guint8 clr[4]);
static gint maze_dialog (void);
static void maze_close_callback (GtkWidget *widget, gpointer data);
static void maze_ok_callback (GtkWidget *widget, gpointer data);
static void maze_entry_callback (GtkWidget *widget, gpointer data);
/* entscale stuff begin */
void entscale_int_new ( GtkWidget *table, gint x, gint y,
gchar *caption, gint *intvar,
gint min, gint max, gint constraint,
EntscaleIntCallbackFunc callback,
gpointer data );
static void entscale_int_destroy_callback (GtkWidget *widget,
gpointer data);
static void entscale_int_scale_update (GtkAdjustment *adjustment,
gpointer data);
static void entscale_int_entry_update (GtkWidget *widget,
gpointer data);
/* entscale stuff end */
/* message box stuff begin */
GtkWidget * message_box (char *, GtkCallback, gpointer);
/* message box stuff end */
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static MazeValues mvals =
{
1, /* Passage width */
0, /* seed */
57, /* multiple * These two had "Experiment with this?" comments */
1 /* offset * in the maz.c source, so, lets expiriment. :) */
};
static MazeInterface mint =
{
FALSE /* run */
};
MAIN ()
static void
query ()
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image (unused)" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
/* If we did have parameters, these be them: */
{ PARAM_INT32, "mazep_size", "Size of the passages" },
{ PARAM_INT32, "maze_rseed", "Random Seed"},
{ PARAM_INT32, "maze_multiple", "Multiple (use 57)" },
{ PARAM_INT32, "maze_offset", "Offset (use 1)" }
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure ("plug_in_maze",
"Generates a maze.",
"Generates a maze using the depth-first search method.",
"Kevin Turner <kevint@poboxes.com>",
"Kevin Turner",
"1997",
"<Image>/Filters/Render/Maze",
"RGB*, GRAY*, INDEXED*",
PROC_PLUG_IN,
nargs, nreturn_vals,
args, return_vals);
}
static void
run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals)
{
static GParam values[1];
GDrawable *drawable;
GRunModeType run_mode;
GStatusType status = STATUS_SUCCESS;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
drawable = gimp_drawable_get (param[2].data.d_drawable);
#ifdef MAZE_DEBUG
fprintf(stderr, "%d", param[2].data.d_drawable);
#endif
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("plug_in_maze", &mvals);
/* Acquire info with a dialog */
if (! maze_dialog ()) {
gimp_drawable_detach (drawable);
return;
}
break;
case RUN_NONINTERACTIVE:
/* WARNING: Stupidity Follows */
if (nparams != 7)
{
status = STATUS_CALLING_ERROR;
}
if (status == STATUS_SUCCESS)
{
mvals.width = (gint) param[3].data.d_int32;
mvals.seed = (gint) param[4].data.d_int32;
mvals.multiple = (gint) param[5].data.d_int32;
mvals.offset = (gint) param[6].data.d_int32;
}
break;
/* #define MAZE_DEBUG */
#ifdef MAZE_DEBUG
fprintf(stderr,"nparams: %d width: %d seed: %d multiple: %d offset: %d\n",
nparams, mvals.width, mvals.seed, mvals.multiple, mvals.offset);
#endif
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_maze", &mvals);
mvals.seed=time(NULL); /* ** USES NEW SEED when reruning with "last" */
/* values. Maybe not the Right Thing, but I find it handy. */
break;
default:
break;
}
/* color, gray, or indexed... hmm, miss anything? ;) */
if (gimp_drawable_color (drawable->id) || gimp_drawable_gray (drawable->id) || gimp_drawable_indexed (drawable->id)) {
gimp_progress_init ("Drawing Maze...");
maze (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (run_mode == RUN_INTERACTIVE /*|| run_mode == RUN_WITH_LAST_VALS*/)
gimp_set_data ("plug_in_maze", &mvals, sizeof (MazeValues));
} else {
status = STATUS_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static void
maze( GDrawable * drawable)
{
GPixelRgn dest_rgn;
gint mw, mh;
gint deadx, deady;
gint progress, max_progress;
gint x1, y1, x2, y2, x, y;
gint dx, dy, xx, yy;
gint foo, bar, baz;
guint8 fg[4],bg[4];
gpointer pr;
gchar *maz;
gint i;
/* Gets the input area... */
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
/* Initialize pixel region (?) */
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
progress = 0;
max_progress = (x2 - x1) * (y2 - y1);
/* Get the foreground and background colors */
get_colors(drawable,fg,bg);
/* Maze Stuff Happens Here */
mw = (x2-x1) / mvals.width;
mh = (y2-y1) / mvals.width;
mw -= !(mw & 1); /* mazegen doesn't work with even-sized mazes. */
mh -= !(mh & 1); /* Note I don't warn the user about this... */
deadx = ((x2-x1) - mw * mvals.width)/2;
deady = ((y2-y1) - mh * mvals.width)/2;
maz = g_malloc(mw * mh);
for (i = 0; i < (mw * mh); ++i)
maz[i] = 0;
#ifdef MAZE_DEBUG
printf("x: %d\ty: %d\nmw: %d\tmh: %d\ndx: %d\tdy: %d\nwidth:%d\n",
(x2-x1),(y2-y1),mw,mh,deadx,deady,mvals.width);
#endif
(void) mazegen((mw+1), maz, mw, mh, mvals.seed);
/* (void) mazegen(((x2-x1)+1), maz, (x2-x1), (y2-y1), rnd); */
/* It's done happening. Now go through and color dem pixels... */
for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
x = dest_rgn.x - x1 - deadx;
y = dest_rgn.y - y1 - deady;
/* First boxes by edge of tile must be handled specially
because they may have started on a previous tile,
unbeknownst to us. */
dx = mvals.width - (x % mvals.width);
dy = mvals.width - (y % mvals.width);
foo = x/mvals.width;
bar = mw * (y/mvals.width);
/* Draws the upper-left [split] box */
drawbox(&dest_rgn,0,0,dx,dy,
maz[foo+bar] ? fg : bg);
baz=foo+1;
/* Draw the top row [split] boxes */
for(xx=dx/*1*/; xx < dest_rgn.w; xx+=mvals.width/*+1*/)
{ drawbox(&dest_rgn,xx,0,mvals.width,dy,
maz[bar + baz++] ? fg : bg ); }
baz=bar+mw;
/* Left column */
for(yy=dy/*+1*/; yy < dest_rgn.h; yy+=mvals.width/*+1*/) {
drawbox(&dest_rgn,0,yy,dx,mvals.width,
maz[foo + baz] ? fg : bg );
baz += mw;
}
foo++;
/* Everything else */
for(yy=dy/*+1*/; yy < dest_rgn.h; yy+=mvals.width/*+1*/) {
baz = foo; bar+=mw;
for(xx=dx/*+1*/; xx < dest_rgn.w; xx+=mvals.width/*+1*/)
{
#ifdef MAZE_DEBUG
putchar(maz[bar+baz] ? '#' : '.');
#endif
drawbox(&dest_rgn,xx,yy,mvals.width,mvals.width,
maz[bar + baz++] ? fg : bg ); }
#ifdef MAZE_DEBUG
putchar('\n');
#endif
}
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
/* Note the progess indicator doesn't indicate how much of the maze
has been built... It just indicates how much has been drawn
*after* building... Thing is, that's what takes longer. */
}
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
}
void drawbox( GPixelRgn *dest_rgn,
guint x, guint y, guint w, guint h,
guint8 clr[4])
{
guint xx,yy, foo, bar;
guint8 bp;
/* This looks ugly, but it's just finding the lower number... */
foo = dest_rgn->h * dest_rgn->rowstride
< y * dest_rgn->rowstride + h * dest_rgn->rowstride
? dest_rgn->h * dest_rgn->rowstride
: y * dest_rgn->rowstride + h * dest_rgn->rowstride;
bar = dest_rgn->w * dest_rgn->bpp
< x * dest_rgn->bpp + w * dest_rgn->bpp
? dest_rgn->w * dest_rgn->bpp
: x * dest_rgn->bpp + w * dest_rgn->bpp;
for (yy = dest_rgn->rowstride * y;
yy < foo;
yy += dest_rgn->rowstride ) {
for (xx= x * dest_rgn->bpp;
xx < bar;
xx+= dest_rgn->bpp) {
for (bp=0; bp < dest_rgn->bpp; bp++) {
dest_rgn->data[yy+xx+bp]=clr[bp];
} /* next bp */
} /* next xx */
} /* next yy */
}
/* The Incredible Recursive Maze Generation Routine */
/* Ripped from rec.programmers.games maze-faq */
/* Modified and commented by me, Kevin Turner. */
gint mazegen(pos, maz, x, y, rnd)
gint pos, x, y, rnd;
gchar *maz;
{
gchar d, i;
gint c=0, j=1;
/* Punch a hole here... */
maz[pos] = 1;
/* If there is a wall two rows above us, bit 1 is 1. */
while((d= (pos <= (x * 2) ? 0 : (maz[pos - x - x ] ? 0 : 1))
/* If there is a wall two rows below us, bit 2 is 1. */
| (pos >= x * (y - 2) ? 0 : (maz[pos + x + x] ? 0 : 2))
/* If there is a wall two columns to the right, bit 3 is 1. */
| (pos % x == x - 2 ? 0 : (maz[pos + 2] ? 0 : 4))
/* If there is a wall two colums to the left, bit 4 is 1. */
| ((pos % x == 1 ) ? 0 : (maz[pos-2] ? 0 : 8)))) {
/* Note if all bits are 0, d is false, we don't do this
while loop, we don't call ourselves again, so this branch
is done. */
/* I see what this loop does (more or less), but I don't know
_why_ it does it this way... I also haven't figured out exactly
which values of multiple will work and which won't. */
do {
rnd = (rnd * mvals.multiple + mvals.offset);
i = 3 & (rnd / d);
if (++c > 100) { /* Break and try to salvage something */
i=99; /* if it looks like we're going to be */
break; /* here forever... */
}
} while ( !(d & ( 1 << i) ) );
/* ...While there's *not* a wall in direction i. */
/* (stop looping when there is) */
switch (i) { /* This is simple enough. */
case 0: /* Go in the direction we just figured . . . */
j= -x;
break;
case 1:
j = x;
break;
case 2:
j=1;
break;
case 3:
j= -1;
break;
case 99:
return 1; /* Hey neat, broken mazes! */
break; /* (Umm... Wow... Yeah, neat.) */
default:
break;
}
/* And punch a hole there. */
maz[pos + j] = 1;
/* Now, start again just past where we punched the hole... */
mazegen(pos + 2 * j, maz, x, y, rnd);
} /* End while(d=...) Loop */
return 0;
}
static void
get_colors (GDrawable *drawable, guint8 *fg, guint8 *bg)
{
GParam *return_vals;
gint nreturn_vals;
switch ( gimp_drawable_type (drawable->id) )
{
case RGBA_IMAGE: /* ASSUMPTION: Assuming the user wants entire */
fg[3] = 255; /* area to be fully opaque. */
bg[3] = 255;
case RGB_IMAGE:
return_vals = gimp_run_procedure ("gimp_palette_get_foreground",
&nreturn_vals,
PARAM_END);
if (return_vals[0].data.d_status == STATUS_SUCCESS)
{
fg[0] = return_vals[1].data.d_color.red;
fg[1] = return_vals[1].data.d_color.green;
fg[2] = return_vals[1].data.d_color.blue;
}
else
{
fg[0] = 255;
fg[1] = 255;
fg[2] = 255;
}
return_vals = gimp_run_procedure ("gimp_palette_get_background",
&nreturn_vals,
PARAM_END);
if (return_vals[0].data.d_status == STATUS_SUCCESS)
{
bg[0] = return_vals[1].data.d_color.red;
bg[1] = return_vals[1].data.d_color.green;
bg[2] = return_vals[1].data.d_color.blue;
}
else
{
bg[0] = 0;
bg[1] = 0;
bg[2] = 0;
}
break;
case GRAYA_IMAGE: /* and again */
fg[1] = 255;
bg[1] = 255;
case GRAY_IMAGE:
return_vals = gimp_run_procedure ("gimp_palette_get_foreground",
&nreturn_vals,
PARAM_END);
if (return_vals[0].data.d_status == STATUS_SUCCESS)
{
fg[0] = 0.30 * return_vals[1].data.d_color.red +
0.59 * return_vals[1].data.d_color.green +
0.11 * return_vals[1].data.d_color.blue;
}
else
{
fg[0] = 255;
}
return_vals = gimp_run_procedure ("gimp_palette_get_background",
&nreturn_vals,
PARAM_END);
if (return_vals[0].data.d_status == STATUS_SUCCESS)
{
bg[0] = 0.30 * return_vals[1].data.d_color.red +
0.59 * return_vals[1].data.d_color.green +
0.11 * return_vals[1].data.d_color.blue;
}
else
{
bg[0] = 0;
}
break;
case INDEXEDA_IMAGE:
case INDEXED_IMAGE: /* FIXME: Should use current fg/bg colors. */
fputs("Maze: Using indexed colors 15 and 0 to draw maze.",stderr);
fg[0] = 15; /* As a plugin, I protest. *I* shouldn't be the */
bg[0] = 0; /* one who has to deal with this colormapcrap. */
break;
default:
break;
}
}
static gint maze_dialog()
{
GtkWidget *dlg;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *button;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *notebook;
gchar **argv;
gint argc;
gchar buffer[32];
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("maze");
gtk_init (&argc, &argv);
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), MAZE_TITLE);
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) maze_close_callback,
NULL);
/* Action area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) maze_ok_callback,
dlg);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT (dlg));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
gtk_widget_show (button);
/* Create notebook */
notebook = gtk_notebook_new ();
gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_TOP);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), notebook, TRUE, TRUE, 0);
gtk_widget_show (notebook);
/* Set up Options page */
frame = gtk_frame_new ("Maze Options");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
/* gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0); */
table = gtk_table_new (2, 2, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
/* Seed input box */
label = gtk_label_new ("Seed");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL, 0, 5, 0 );
gtk_widget_show (label);
entry = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), entry, 1, 2, 0, 1, GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_set_usize( entry, ENTRY_WIDTH, 0 );
sprintf( buffer, "%d", mvals.seed );
gtk_entry_set_text (GTK_ENTRY (entry), buffer );
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) maze_entry_callback,
&mvals.seed);
gtk_widget_show (entry);
/* entscale == Entry and Scale pair function found in pixelize.c */
entscale_int_new (table, 0, 1, "Width:", &mvals.width,
1, 64, FALSE,
NULL, NULL);
/* Add Options page to notebook */
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), frame,
gtk_label_new ("Options"));
/* Set up other page */
frame = gtk_frame_new ("Don't change these");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
/* gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0); */
table = gtk_table_new (2, 2, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
/* Multiple input box */
label = gtk_label_new ("Multiple (57)");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL, 0, 5, 0 );
gtk_widget_show (label);
entry = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), entry, 1, 2, 0, 1, GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_set_usize( entry, ENTRY_WIDTH, 0 );
sprintf( buffer, "%d", mvals.multiple );
gtk_entry_set_text (GTK_ENTRY (entry), buffer );
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) maze_entry_callback,
&mvals.multiple);
gtk_widget_show (entry);
/* Offset input box */
label = gtk_label_new ("Offset (1)");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2, GTK_FILL, 0, 5, 0 );
gtk_widget_show (label);
entry = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), entry, 1, 2, 1, 2, GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_set_usize( entry, ENTRY_WIDTH, 0 );
sprintf( buffer, "%d", mvals.offset );
gtk_entry_set_text (GTK_ENTRY (entry), buffer );
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) maze_entry_callback,
&mvals.offset);
gtk_widget_show (entry);
/* Add Advanced page to notebook */
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), frame,
gtk_label_new ("Advanced"));
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return mint.run;
}
/* Maze Interface Functions */
static void
maze_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
maze_ok_callback (GtkWidget *widget,
gpointer data)
{
mint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
maze_entry_callback (GtkWidget *widget,
gpointer data)
{
gint *text_val;
text_val = (gint *) data;
*text_val = atoi (gtk_entry_get_text (GTK_ENTRY (widget)));
}
/* ==================================================================== */
/* As found in pixelize.c */
/*
Entry and Scale pair 1.03
TODO:
- Do the proper thing when the user changes value in entry,
so that callback should not be called when value is actually not changed.
- Update delay
*/
/*
* entscale: create new entscale with label. (int)
* 1 row and 2 cols of table are needed.
* Input:
* x, y: starting row and col in table
* caption: label string
* intvar: pointer to variable
* min, max: the boundary of scale
* constraint: (bool) true iff the value of *intvar should be constraint
* by min and max
* callback: called when the value is actually changed
* call_data: data for callback func
*/
void
entscale_int_new ( GtkWidget *table, gint x, gint y,
gchar *caption, gint *intvar,
gint min, gint max, gint constraint,
EntscaleIntCallbackFunc callback,
gpointer call_data)
{
EntscaleIntData *userdata;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *scale;
GtkObject *adjustment;
gchar buffer[256];
gint constraint_val;
userdata = g_new ( EntscaleIntData, 1 );
label = gtk_label_new (caption);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
/*
If the first arg of gtk_adjustment_new() isn't between min and
max, it is automatically corrected by gtk later with
"value_changed" signal. I don't like this, since I want to leave
*intvar untouched when `constraint' is false.
The lines below might look oppositely, but this is OK.
*/
userdata->constraint = constraint;
if( constraint )
constraint_val = *intvar;
else
constraint_val = ( *intvar < min ? min : *intvar > max ? max : *intvar );
userdata->adjustment = adjustment =
gtk_adjustment_new ( constraint_val, min, max, 1.0, 1.0, 0.0);
scale = gtk_hscale_new ( GTK_ADJUSTMENT(adjustment) );
gtk_widget_set_usize (scale, ENTSCALE_INT_SCALE_WIDTH, 0);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
userdata->entry = entry = gtk_entry_new ();
gtk_widget_set_usize (entry, ENTSCALE_INT_ENTRY_WIDTH, 0);
sprintf( buffer, "%d", *intvar );
gtk_entry_set_text( GTK_ENTRY (entry), buffer );
userdata->callback = callback;
userdata->call_data = call_data;
/* userdata is done */
gtk_object_set_user_data (GTK_OBJECT(adjustment), userdata);
gtk_object_set_user_data (GTK_OBJECT(entry), userdata);
/* now ready for signals */
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) entscale_int_entry_update,
intvar);
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) entscale_int_scale_update,
intvar);
gtk_signal_connect (GTK_OBJECT (entry), "destroy",
(GtkSignalFunc) entscale_int_destroy_callback,
userdata );
/* start packing */
hbox = gtk_hbox_new (FALSE, 5);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (hbox), entry, FALSE, TRUE, 0);
gtk_table_attach (GTK_TABLE (table), label, x, x+1, y, y+1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_table_attach (GTK_TABLE (table), hbox, x+1, x+2, y, y+1,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
gtk_widget_show (entry);
gtk_widget_show (scale);
gtk_widget_show (hbox);
}
/* when destroyed, userdata is destroyed too */
static void
entscale_int_destroy_callback (GtkWidget *widget,
gpointer data)
{
EntscaleIntData *userdata;
userdata = data;
g_free ( userdata );
}
static void
entscale_int_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
EntscaleIntData *userdata;
GtkEntry *entry;
gchar buffer[256];
gint *intvar = data;
gint new_val;
userdata = gtk_object_get_user_data (GTK_OBJECT (adjustment));
new_val = (gint) adjustment->value;
*intvar = new_val;
entry = GTK_ENTRY( userdata->entry );
sprintf (buffer, "%d", (int) new_val );
/* avoid infinite loop (scale, entry, scale, entry ...) */
gtk_signal_handler_block_by_data ( GTK_OBJECT(entry), data );
gtk_entry_set_text ( entry, buffer);
gtk_signal_handler_unblock_by_data ( GTK_OBJECT(entry), data );
if (userdata->callback)
(*userdata->callback) (*intvar, userdata->call_data);
}
static void
entscale_int_entry_update (GtkWidget *widget,
gpointer data)
{
EntscaleIntData *userdata;
GtkAdjustment *adjustment;
int new_val, constraint_val;
int *intvar = data;
userdata = gtk_object_get_user_data (GTK_OBJECT (widget));
adjustment = GTK_ADJUSTMENT( userdata->adjustment );
new_val = atoi (gtk_entry_get_text (GTK_ENTRY (widget)));
constraint_val = new_val;
if ( constraint_val < adjustment->lower )
constraint_val = adjustment->lower;
if ( constraint_val > adjustment->upper )
constraint_val = adjustment->upper;
if ( userdata->constraint )
*intvar = constraint_val;
else
*intvar = new_val;
adjustment->value = constraint_val;
gtk_signal_handler_block_by_data ( GTK_OBJECT(adjustment), data );
gtk_signal_emit_by_name ( GTK_OBJECT(adjustment), "value_changed");
gtk_signal_handler_unblock_by_data ( GTK_OBJECT(adjustment), data );
if (userdata->callback)
(*userdata->callback) (*intvar, userdata->call_data);
}
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