This is the program I am trying to compile, I got it from a canvas tutorial in the GNOME site:
/* GNOME Piskvorky (gomoku),
A 19x19 board where you have to connect 5 in a row to win
(the board size is arbitrary)
No artificial intelligence, you play both sides
*/
/* the main gnome include */
#include <gnome.h>
/* we define a version ourselves if we're not using automake/autogen */
#define VERSION "0.1"
/* what can be in a spot */
enum {
NOTHING,
CROSS,
CIRCLE
};
/* the board size */
#define BOARD_SIZE 19
/* border around the board itself */
#define BOARD_BORDER 15
/* cell size on the board */
#define CELL_SIZE 22
/* cell padding */
#define CELL_PAD 6
/* the height of the status area on the bottom of the canvas,
it is the bottom border */
#define BOARD_STATUS (CELL_SIZE+5)
/* the thickness of lines */
#define THICKNESS 3
/* the distance of the drop shadow */
#define DROP_SHADOW 2
/* array of the board */
static int board[BOARD_SIZE][BOARD_SIZE];
/* the player that has the current move, if it's NOTHING, nobody can
play until the user hits "New Game" */
static int current_player = CROSS;
/* the number of the current move */
static int move_number = 0;
/* the winner of the last game */
static int last_winner = NOTHING;
/* the main window pointer */
static GnomeApp *app;
/* the canvas */
static GnomeCanvas *canvas;
/* the canvas group of the marks on the board */
static GnomeCanvasGroup *boardgroup = NULL;
/* the text of the status */
static GnomeCanvasItem *status_text;
/* the group of the image for the status */
static GnomeCanvasGroup *status_image;
/* a utility function to draw a line */
static void
draw_a_line(GnomeCanvasGroup *group,
int x1, int y1, int x2, int y2, char *color)
{
GnomeCanvasPoints *points;
/* allocate a new points array */
points = gnome_canvas_points_new (2);
/* fill out the points */
points->coords[0] = x1;
points->coords[1] = y1;
points->coords[2] = x2;
points->coords[3] = y2;
/* draw the line */
gnome_canvas_item_new(group,
gnome_canvas_line_get_type(),
"points", points,
"fill_color", color,
"width_units", (double)THICKNESS,
NULL);
/* free the points array */
gnome_canvas_points_free(points);
}
/* draw a cross onto group */
static void
draw_cross(GnomeCanvasGroup *group)
{
/* draw the drop shadow */
draw_a_line(group,
CELL_PAD + DROP_SHADOW,
CELL_PAD + DROP_SHADOW,
CELL_SIZE - CELL_PAD + DROP_SHADOW,
CELL_SIZE - CELL_PAD + DROP_SHADOW,
"dark gray");
draw_a_line(group,
CELL_PAD + DROP_SHADOW,
CELL_SIZE - CELL_PAD + DROP_SHADOW,
CELL_SIZE - CELL_PAD + DROP_SHADOW,
CELL_PAD + DROP_SHADOW,
"dark gray");
/* draw the cross itself */
draw_a_line(group,
CELL_PAD,
CELL_PAD,
CELL_SIZE - CELL_PAD,
CELL_SIZE - CELL_PAD,
"blue");
draw_a_line(group,
CELL_PAD,
CELL_SIZE - CELL_PAD,
CELL_SIZE - CELL_PAD,
CELL_PAD,
"blue");
}
/* draw a circle onto group*/
static void
draw_circle(GnomeCanvasGroup *group)
{
/* draw the drop shadow */
gnome_canvas_item_new(group,
gnome_canvas_ellipse_get_type(),
"x1",(double)(CELL_PAD + DROP_SHADOW),
"y1",(double)(CELL_PAD + DROP_SHADOW),
"x2",(double)(CELL_SIZE - CELL_PAD + DROP_SHADOW),
"y2",(double)(CELL_SIZE - CELL_PAD + DROP_SHADOW),
"outline_color", "dark gray",
"width_units", (double)THICKNESS,
NULL);
/* draw the circle itself */
gnome_canvas_item_new(group,
gnome_canvas_ellipse_get_type(),
"x1",(double)CELL_PAD,
"y1",(double)CELL_PAD,
"x2",(double)(CELL_SIZE - CELL_PAD),
"y2",(double)(CELL_SIZE - CELL_PAD),
"outline_color", "dark green",
"width_units", (double)THICKNESS,
NULL);
}
/* draw a red line from x1,y1 to x2,y2 on the board */
static void
draw_strike(int x1, int y1, int x2, int y2)
{
/* draw a red line connecting the centers of the two cells */
draw_a_line(boardgroup,
x1*CELL_SIZE + CELL_SIZE/2,
y1*CELL_SIZE + CELL_SIZE/2,
x2*CELL_SIZE + CELL_SIZE/2,
y2*CELL_SIZE + CELL_SIZE/2,
"red");
}
/* make a mark (CROSS or a CIRCLE) on the board */
static void
make_mark_at(int mark, int x, int y)
{
GnomeCanvasItem *group;
/* update our data */
board[x][y] = mark;
/* make a new group for the mark */
group = gnome_canvas_item_new(boardgroup,
gnome_canvas_group_get_type(),
"x",(double)x*CELL_SIZE,
"y",(double)y*CELL_SIZE,
NULL);
if(mark == CROSS)
draw_cross(GNOME_CANVAS_GROUP(group));
else
draw_circle(GNOME_CANVAS_GROUP(group));
}
/* check for 5 in a row on the axis from (x-4*xincr,y-4*yincr) to
(x+4*xincr,y+4*yincr), return TRUE if it's there and FALSE if not.
it will also draw the red strike line */
static gboolean
check_five_axis(int x, int y, int xincr, int yincr)
{
int i,j,n; /* iteration variables */
int count = 0; /* length of a line */
int x1,y1; /* the start of the line */
/* where do we start. we set these to -5 times the increment,
as we will immediately increment these when we enter
the loop */
i = x-5*xincr;
j = y-5*yincr;
x1 = y1 = -1;
/* loop through the points */
for(n=0;n<9;n++) {
/* increment the loop vars */
i += xincr;
j += yincr;
/* if outside of range go again */
if(i<0 || i>=BOARD_SIZE ||
j<0 || j>=BOARD_SIZE)
continue;
/* if this is the first legal point */
if(x1==-1) {
x1 = i;
y1 = j;
}
/* check this point */
if(board[x1][y1]==board[i][j]) {
count ++;
/* we've found it */
if(count==5) {
/* draw a line through the line of 5 */
draw_strike(x1,y1,i,j);
return TRUE;
}
} else {
count = 1;
x1 = i;
y1 = j;
}
}
return FALSE;
}
/* check for 5 in a row around the point x,y, return TRUE
if it's there and FALSE if not. */
static gboolean
check_five(int x, int y)
{
int ret = FALSE;
/* check all four axis */
if(check_five_axis(x,y,0,1))
ret = TRUE;
if(check_five_axis(x,y,1,0))
ret = TRUE;
if(check_five_axis(x,y,1,1))
ret = TRUE;
if(check_five_axis(x,y,1,-1))
ret = TRUE;
return ret;
}
static void
set_status(void)
{
GnomeCanvasItem *item;
double tw;
char *text;
if(current_player==NOTHING)
text = g_strdup_printf("Game OVER after %d moves! Winner:",
move_number);
else
text = g_strdup_printf("Moves played: %d Current player:",
move_number);
/* set the text */
gnome_canvas_item_set(status_text,
"text",text,
NULL);
g_free(text);
/* get the width of the text */
gtk_object_get(GTK_OBJECT(status_text),
"text_width",&tw,
NULL);
/* if there is an image, destroy it */
if(status_image)
gtk_object_destroy(GTK_OBJECT(status_image));
/* make new group for the status image */
item = gnome_canvas_item_new(gnome_canvas_root(canvas),
gnome_canvas_group_get_type(),
"x",(double)(BOARD_BORDER + tw + CELL_PAD),
"y",(double)(BOARD_SIZE*CELL_SIZE +
BOARD_BORDER +
(BOARD_STATUS -
CELL_SIZE)/2),
NULL);
status_image = GNOME_CANVAS_GROUP(item);
/* draw the proper mark */
if(current_player == CROSS)
draw_cross(status_image);
else if(current_player == CIRCLE)
draw_circle(status_image);
else {
/* the current player is NOTHING so we draw whatever
is the last winner */
if(last_winner == CROSS)
draw_cross(status_image);
else
draw_circle(status_image);
}
}
/* clear the board and set current player to CROSS */
static void
new_game(void)
{
int i,j;
GnomeCanvasItem *item;
current_player = CROSS;
move_number = 0;
for(i=0;i<BOARD_SIZE;i++)
for(j=0;j<BOARD_SIZE;j++)
board[i][j] = NOTHING;
/* clear the board */
if(boardgroup)
gtk_object_destroy(GTK_OBJECT(boardgroup));
/* make a new group for the items */
item = gnome_canvas_item_new(gnome_canvas_root(canvas),
gnome_canvas_group_get_type(),
"x",(double)BOARD_BORDER,
"y",(double)BOARD_BORDER,
NULL);
boardgroup = GNOME_CANVAS_GROUP(item);
/* set the status */
set_status();
}
/* draw the background of the playing board */
static void
draw_background(void)
{
int i;
/* white background */
gnome_canvas_item_new(gnome_canvas_root(canvas),
gnome_canvas_rect_get_type(),
"x1",(double)BOARD_BORDER,
"y1",(double)BOARD_BORDER,
"x2",(double)(BOARD_BORDER +
BOARD_SIZE*CELL_SIZE),
"y2",(double)(BOARD_BORDER +
BOARD_SIZE*CELL_SIZE),
"fill_color", "white",
NULL);
/* draw horizontal lines */
for(i=0;i<=BOARD_SIZE;i++) {
draw_a_line(gnome_canvas_root(canvas),
BOARD_BORDER,
BOARD_BORDER + i*CELL_SIZE,
BOARD_BORDER + BOARD_SIZE*CELL_SIZE,
BOARD_BORDER + i*CELL_SIZE,
"black");
}
/* draw vertical lines */
for(i=0;i<=BOARD_SIZE;i++) {
draw_a_line(gnome_canvas_root(canvas),
BOARD_BORDER + i*CELL_SIZE,
BOARD_BORDER,
BOARD_BORDER + i*CELL_SIZE,
BOARD_BORDER + BOARD_SIZE*CELL_SIZE,
"black");
}
/* draw the status text */
status_text = gnome_canvas_item_new(gnome_canvas_root(canvas),
gnome_canvas_text_get_type(),
"x",(double)BOARD_BORDER,
"y",(double)(BOARD_SIZE*CELL_SIZE +
BOARD_BORDER +
BOARD_STATUS/2),
"anchor",GTK_ANCHOR_WEST,
"font","fixed",
"fill_color", "black",
"text","",
NULL);
status_image = NULL;
}
static gboolean
play_location(int player, int x, int y)
{
/* if something is here already or no player is current*/
if(board[x][y]!=NOTHING)
return FALSE;
/* mark the board */
make_mark_at(player,x,y);
move_number++;
/* check for a line of five */
if(check_five(x,y)) {
if(player == CROSS)
gnome_app_message(app,"Player with crosses wins!");
else
gnome_app_message(app,"Player with circles wins!");
/* set the last winner */
last_winner = player;
/* don't allow further playing */
current_player = NOTHING;
}
/* set the status */
set_status();
return TRUE;
}
/* switch to the next player, if we had some AI, this is where it would go */
static void
swap_players(void)
{
/* swap players if we are still playing */
if(current_player == CROSS)
current_player = CIRCLE;
else if(current_player == CIRCLE)
current_player = CROSS;
/* set the status */
set_status();
}
static int
canvas_event(GnomeCanvas *c, GdkEvent *event, gpointer data)
{
int x,y;
/* we ignore all events except for BUTTON_PRESS */
if(event->type != GDK_BUTTON_PRESS)
return FALSE;
/* check if it's outside our range */
if(event->button.x < BOARD_BORDER ||
event->button.x > BOARD_BORDER + CELL_SIZE*BOARD_SIZE ||
event->button.y < BOARD_BORDER ||
event->button.y > BOARD_BORDER + CELL_SIZE*BOARD_SIZE)
return FALSE;
/* if no player is current then just skip this event */
if(current_player == NOTHING)
return FALSE;
x = (event->button.x - BOARD_BORDER) / CELL_SIZE;
y = (event->button.y - BOARD_BORDER) / CELL_SIZE;
/* play the location, if not successful, just return */
if(!play_location(current_player,x,y))
return FALSE;
swap_players();
/* return true as we have handled it */
return TRUE;
}
static void
about_cb(GtkWidget *widget, gpointer data)
{
static GtkWidget* dialog = NULL;
/* a list of authors */
const char *authors[] = {
"George Lebl <jirka@5z.com>",
NULL
};
/* if the dialog is already created, just show and raise it
(just in case it is obscured or minimized) */
if(dialog) {
gdk_window_show(dialog->window);
gdk_window_raise(dialog->window);
return;
}
/* create the dialog */
dialog = gnome_about_new("Gnome Piskvorky", VERSION,
"(c) 1999 George Lebl",
authors,
"The game of piskvorky which some\n"
"prefer to call gomoku.",
NULL);
/* set the parent of the dialog to be the main application
window, this will help windowmanagers */
gnome_dialog_set_parent(GNOME_DIALOG(dialog), GTK_WINDOW(app));
/* when the dialog gets destroyed, the function gtk_widget_destroyed
is a utility function from gtk that will NULL the pointer that is
passed as the data of the signal */
gtk_signal_connect(GTK_OBJECT(dialog), "destroy",
GTK_SIGNAL_FUNC(gtk_widget_destroyed),
&dialog);
gtk_widget_show(dialog);
}
/* define the Game menu */
static GnomeUIInfo game_menu[] = {
GNOMEUIINFO_MENU_NEW_GAME_ITEM(new_game, NULL),
GNOMEUIINFO_SEPARATOR,
GNOMEUIINFO_MENU_EXIT_ITEM(gtk_main_quit, NULL),
GNOMEUIINFO_END
};
/* the Help menu */
static GnomeUIInfo help_menu[] = {
GNOMEUIINFO_HELP("gnome-piskvorky"),
GNOMEUIINFO_MENU_ABOUT_ITEM(about_cb, NULL),
GNOMEUIINFO_END
};
/* define the main menubar */
static GnomeUIInfo main_menu[] = {
GNOMEUIINFO_MENU_GAME_TREE(game_menu),
GNOMEUIINFO_MENU_HELP_TREE(help_menu),
GNOMEUIINFO_END
};
/* create the main window */
static GnomeApp *
create_window(void)
{
GtkWidget *app;
GtkWidget *w;
app = gnome_app_new("gnome-piskvorky",
"Gnome Piskvorky");
/* we bind the delete event directly to gtk_main_quit,
since this function takes no arguments, there will be
no conflict in argument lists */
gtk_signal_connect(GTK_OBJECT(app), "delete_event",
GTK_SIGNAL_FUNC(gtk_main_quit),
NULL);
/* add the menus to the main window */
gnome_app_create_menus(GNOME_APP(app), main_menu);
/* setup appbar (bottom of window bar for status, menu hints and
* progress display) */
w = gnome_appbar_new(FALSE, TRUE, GNOME_PREFERENCES_USER);
gnome_app_set_statusbar(GNOME_APP(app), w);
/* make menu hints display on the appbar */
gnome_app_install_menu_hints(GNOME_APP(app), main_menu);
/* create a new canvas */
w = gnome_canvas_new();
canvas = GNOME_CANVAS(w);
/* connect the signal handler we use to capture button presses */
gtk_signal_connect(GTK_OBJECT(w),"event",
GTK_SIGNAL_FUNC(canvas_event),
NULL);
/* set where can the canvas scroll (our usable area) */
gnome_canvas_set_scroll_region(canvas, 0.0, 0.0,
BOARD_SIZE*CELL_SIZE + 2*BOARD_BORDER,
BOARD_SIZE*CELL_SIZE + BOARD_BORDER +
BOARD_STATUS);
/* set the size of the widget */
gtk_widget_set_usize(w,
BOARD_SIZE*CELL_SIZE + 2*BOARD_BORDER,
BOARD_SIZE*CELL_SIZE + BOARD_BORDER +
BOARD_STATUS);
/* set the contents of the app window to the canvas */
gnome_app_set_contents(GNOME_APP(app), w);
return GNOME_APP(app);
}
/* our main function */
int
main(int argc, char *argv[])
{
gnome_init("gnome-piskvorky",VERSION,argc,argv);
app = create_window();
gtk_widget_show_all(GTK_WIDGET(app));
draw_background();
new_game();
gtk_main();
return 0;
}
The include <gnome.h> does not work on my compiler, also the Makefile for this goes like this:
CFLAGS=-g -Wall `gnome-config --cflags gnome gnomeui`
LDFLAGS=`pkg-config --libs gnome gnomeui`
all: gnome-piskvorky
clean:
rm -f *.o core gnome-piskvorky
ensure you have libgnomecanvas-devel too of course. that' won't include gnome.h though, that'd be libgnome-devel, but that would surely be a dep of libgnomecanvas anyway
