GTK+ Forums

luhuadeng · Familiar Face Joined: 05 May 2008 Posts: 10

I am writing a simple game.... I use event box to container image. people can move image
from one event box to another.... etc: When click a event box A the image in A: aimage is selected Then click event box B .....After the two clicks aimage would move to the event box B;
The problem is : When I move the image somethings it does not work . It appears the event box disappear when I remove the image...

the mainly code is show bellow:

My English is pool ,,,,, And I do not know whether I have describe clearly.

luhuadeng · Familiar Face Joined: 05 May 2008 Posts: 10

Code: (C)

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#include <gtk/gtk.h>

enum _chess
{
R_CHE,/*红*/
R_MA,
R_PAO,
R_JIANG,
R_SHI,
R_XIANG,
R_BIN,
B_CHE,/*黑*/
B_MA,
B_PAO,
B_JIANG,
B_SHI,
B_XIANG,
B_BIN,
EMPTY,
};

static position[10][9]
={
{R_CHE,R_MA,R_XIANG,R_SHI,R_JIANG,R_SHI,R_XIANG,R_MA,R_CHE},
{EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY},
{EMPTY,R_PAO,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,R_PAO,EMPTY},
{R_BIN,EMPTY,R_BIN,EMPTY,R_BIN,EMPTY,R_BIN,EMPTY,R_BIN,},
{EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY},
{EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY},
{B_BIN,EMPTY,B_BIN,EMPTY,B_BIN,EMPTY,B_BIN,EMPTY,B_BIN,},
{EMPTY,B_PAO,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,B_PAO,EMPTY},
{EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY,EMPTY},
{B_CHE,B_MA,B_XIANG,B_SHI,B_JIANG,B_SHI,B_XIANG,B_MA,B_CHE},
};
typedef struct _ij{
int i;
int j;
} IJ;

GtkWidget * eventbox[10][9];
GdkPixbuf *pixbuf[16];
IJ ij[10][9];

GtkWidget *fixed;

GdkPixmap *load_pixmap (GtkWidget *widget,gchar *filename)
{
GdkPixbuf *pixbuf=NULL;
GdkPixmap *pixmap=NULL;
GdkBitmap *window_shape_bitmap;
pixbuf = gdk_pixbuf_new_from_file (filename,NULL);
pixmap = gdk_pixmap_new (widget->window,gdk_pixbuf_get_width(pixbuf),gdk_pixbuf_get_height(pixbuf),-1);

gdk_pixbuf_render_to_drawable (pixbuf,pixmap,
widget->style->fg_gc[GTK_STATE_NORMAL],
0,0,0,0,
gdk_pixbuf_get_width(pixbuf),
gdk_pixbuf_get_height(pixbuf),
GDK_RGB_DITHER_NORMAL,0,0);
g_object_unref (pixbuf);
return pixmap;
}
struct {
int player;/* 0 black 1 red*/
int selected;/* 0 select 1 unselect*/
int select_i;
int select_j;
int dest_i;
int dest_j;
} current_state;
static gboolean button_press_callback (GtkWidget *event_box,
GdkEventButton *event,
gpointer data)
{
IJ *position_ij = (IJ *)data;

g_print ("Event box pressed at coordinates %d,%d,%d\n",
position_ij->i, position_ij->j,position[position_ij->i][position_ij->j]);
int i = position_ij->i;
int j = position_ij->j;
if(current_state.selected == 0)//unselect any chess
{
if(current_state.player == 0)//black play
{
if(position[i][j] >= R_CHE && position[i][j] <= R_BIN)
return TRUE;
else if(position[i][j] >= B_CHE && position[i][j] <= B_BIN)
{
g_print("selected\n");
current_state.selected = 1;
current_state.select_i = i;
current_state.select_j = j;
return TRUE;
}
else
{
g_print("error\n");
return TRUE;
}
}
else if(current_state.player == 1) //red play
{
if(position[i][j] >= B_CHE && position[i][j] <= B_BIN)
return TRUE;
else if(position[i][j] >= R_CHE && position[i][j] <= R_BIN)
{
g_print("selected\n");
current_state.selected = 1;
current_state.select_i = i;
current_state.select_j = j;
return TRUE;
}
else
{
g_print("error\n");
return TRUE;
}

}

}
else if(current_state.selected == 1)
{
if(current_state.player == 0) //black player
{
if(current_state.select_i == i && current_state.select_j == j) //select the same chess
{
g_print("unselect\n");
current_state.selected = 0;
}
else
{// mv the chess to the dest i,j
g_print("mv to the deat i,j\n");

GtkWidget *image1 = gtk_bin_get_child(GTK_BIN(eventbox[current_state.select_i][current_state.select_j]));
GtkWidget *image2 = gtk_bin_get_child(GTK_BIN(eventbox[i][j]));

g_object_ref(image1);
g_object_ref(image2);

gtk_container_remove(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image1);
gtk_container_remove(GTK_CONTAINER(eventbox[i][j]),image2);

if(position[i][j] >= R_CHE && position[i][j] <= R_BIN)
{
gtk_widget_destroy(image2);
image2 = gtk_image_new_from_pixbuf(pixbuf[14]);
}
else if(position[i][j] >= B_CHE && position[i][j] <= B_BIN)
{
gtk_container_add(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image1);
gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image2);
return TRUE;
}

gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image1);
gtk_container_add(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image2);
position[i][j] = position[current_state.select_i][current_state.select_j];
position[current_state.select_i][current_state.select_j] = EMPTY;
current_state.player = 1;
current_state.selected = 0;

}
}
else if(current_state.player == 1) //red player
{
if(current_state.select_i == i && current_state.select_j == j) //select the same chess
{
g_print("unselected\n");
current_state.selected = 0;
}
else
{// mv the chess to the dest i,j
g_print("mv to the deat i,j\n");

GtkWidget *image1 = gtk_bin_get_child(GTK_BIN(eventbox[current_state.select_i][current_state.select_j]));
GtkWidget *image2 = gtk_bin_get_child(GTK_BIN(eventbox[i][j]));

g_object_ref(image1);
g_object_ref(image2);

gtk_container_remove(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image1);
gtk_container_remove(GTK_CONTAINER(eventbox[i][j]),image2);

if(position[i][j] >= B_CHE && position[i][j] <= B_BIN)
{
gtk_widget_destroy(image2);
image2 = gtk_image_new_from_pixbuf(pixbuf[14]);

}else if(position[i][j] >= R_CHE && position[i][j] <= R_BIN)
{
gtk_container_add(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image1);
gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image2);
return TRUE;
}
position[i][j] = position[current_state.select_i][current_state.select_j];
position[current_state.select_i][current_state.select_j] = EMPTY;

gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image1);
gtk_container_add(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image2);

current_state.player = 0;
current_state.selected = 0;

}

}
else
{
g_print("error\n");
}

}
else
{
g_print("error\n");
}
// gtk_widget_show_all (window1);
return TRUE;
}
void put_event_box(GtkWidget *fixed)
{
int i;
int j;
for(i =0;i<10;i++)
for(j =0;j<9;j++)
{
GtkWidget *image;
eventbox[i][j] = gtk_event_box_new();
ij[i][j].i = i;
ij[i][j].j = j;
g_signal_connect(G_OBJECT(eventbox[i][j]),"button_press_event",G_CALLBACK(button_press_callback),&ij[i][j]);
gtk_event_box_set_visible_window(GTK_EVENT_BOX(eventbox[i][j]),FALSE);
image = gtk_image_new_from_pixbuf(g_object_ref(pixbuf[position[i][j]]));
gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image);
gtk_fixed_put(GTK_FIXED(fixed),eventbox[i][j],190+43 *j ,50+44 *i);
}

}
int main(int argc, char **argv)
{
GtkWidget *window;
GtkWidget *image;
GtkWidget *vbox;

GdkBitmap *bitmap;
GdkPixmap *chessborder_bg;
GdkPixbuf *pixbuf_total;
GdkColormap *colormap;
GdkColor black;
GdkColor white;
GdkGC *gc;
gtk_init(&argc, &argv);
// window = gtk_window_new(GTK_WINDOW_POPUP);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_widget_set_app_paintable(window,TRUE);
gtk_window_set_default_size(GTK_WINDOW(window),800,600);
g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(gtk_main_quit),NULL);
gtk_widget_realize(window);
// vbox = gtk_vbox_new(FALSE,0);
// gtk_container_add(GTK_CONTAINER(window),vbox);

pixbuf_total = gdk_pixbuf_new_from_file("./800/chess.tga",NULL);
image = gtk_image_new_from_file("./800/bg.bmp");

fixed = gtk_fixed_new();
gtk_container_add(GTK_CONTAINER(window),fixed);
gtk_widget_show(fixed);
chessborder_bg = load_pixmap(fixed,"./800/bg.bmp");
gdk_window_set_back_pixmap(fixed->window,chessborder_bg,FALSE);
bitmap = gdk_pixmap_new(NULL,800,600,1);
gc = gdk_gc_new(bitmap);
colormap = gdk_colormap_get_system();
gdk_color_black(colormap,&black);
gdk_color_white(colormap,&white);
gdk_gc_set_foreground(gc,&white);
gdk_gc_set_background(gc,&white);
gdk_draw_rectangle(bitmap,gc,TRUE,0,0,800,600);
gtk_widget_shape_combine_mask(window,bitmap,0,0);

gint srcx=0,srcy=0,width=42,height=41,destx=0,desty=0;
gint i=1;
for( i =0;i< 14;i++)
{
pixbuf[i] = gdk_pixbuf_new_from_file("./800/BlackIcon.tga",NULL);
gdk_pixbuf_copy_area(pixbuf_total,srcx + width *i,srcy,width-1,height,pixbuf[i],destx,desty);
// image = gtk_image_new_from_pixbuf(pixbuf[i]);
//eventbox[i] = gtk_event_box_new();
//gtk_event_box_set_visible_window(GTK_EVENT_BOX(eventbox[i]),FALSE);
//gtk_container_add(GTK_CONTAINER(eventbox[i]),image);

// gtk_box_pack_start(GTK_BOX(vbox),image,FALSE,FALSE,0);
//gtk_fixed_put(GTK_FIXED(fixed),eventbox[i],40*i,40*i);
}
pixbuf[15] = gdk_pixbuf_new_from_file("./800/empty.tga",NULL);
pixbuf[14] = gdk_pixbuf_new_subpixbuf(pixbuf[15],0,0,41,41);

put_event_box(fixed);

gtk_widget_show_all(window);
gtk_main();
return 0;
}

[/url]

luhuadeng · Familiar Face Joined: 05 May 2008 Posts: 10

Code: (Plaintext)

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GtkWidget *image1 = gtk_bin_get_child(GTK_BIN(eventbox[current_state.select_i][current_state.select_j]));
GtkWidget *image2 = gtk_bin_get_child(GTK_BIN(eventbox[i][j]));

g_object_ref(image1);
g_object_ref(image2);

gtk_container_remove(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image1);
gtk_container_remove(GTK_CONTAINER(eventbox[i][j]),image2);

if(position[i][j] >= R_CHE && position[i][j] <= R_BIN)
{
gtk_widget_destroy(image2);
image2 = gtk_image_new_from_pixbuf(pixbuf[14]);
}
else if(position[i][j] >= B_CHE && position[i][j] <= B_BIN)
{
gtk_container_add(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image1);
gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image2);
return TRUE;
}

gtk_container_add(GTK_CONTAINER(eventbox[i][j]),image1);
gtk_container_add(GTK_CONTAINER(eventbox[current_state.select_i][current_state.select_j]),image2);

It is cause by the newly create widget do not have realized.
add

Code: (Plaintext)
1 2 3	gtk_widget_show(image2)

after the

Code: (Plaintext)
1 2 3	image2 = gtk_image_new_from_pixbuf(pixbuf[14]);

can resolve the problem..
the final code look like

Code: (Plaintext)
1 2 3 4 5 6	190 gtk_widget_destroy(image2); 191 GtkWidget *image2 = gtk_image_new_from_pixbuf(pixbuf[14]); 192 gtk_widget_show(GTK_WIDGET(image2));