GTK+ Forums

paragasu · Familiar Face Joined: 31 Jul 2008 Posts: 44

how replace a gtk notebook instead of appending a new page?

thank you

dreblen · Posted: Mon Oct 06, 2008 2:32 am Post subject:

I can't seem to find a replace_page function either, but you could probably do something like this:

Code: (C)
1 2 3	gint old_page_num = gtk_notebook_page_num(nb, old_page); gtk_notebook_remove_page(nb, old_page_num); gtk_notebook_insert_page(nb, new_page, label, old_page_num);

Here are the info links:
http://library.gnome.org/devel/gtk/stable/GtkNotebook.html#gtk-notebook-page-num
http://library.gnome.org/devel/gtk/stable/GtkNotebook.html#gtk-notebook-remove-page
http://library.gnome.org/devel/gtk/stable/GtkNotebook.html#gtk-notebook-insert-page

paragasu · Familiar Face Joined: 31 Jul 2008 Posts: 44

well.. thank you.. but still need one more question to ask :D
how to make sure no duplicate page in the notebook.

i have this function, which create a notebook page every time the
user click on a list of selection (treeview). but the problem come when
user click on selection more than one time.

As a result there is exist a more than one page that contain same information. How to find out, the page with that information is already
exists so i do not need to insert anymore page. Or how do i know if the page exist so i can replace it?

thank you

dreblen · Posted: Mon Oct 06, 2008 3:05 am Post subject:

Maybe I'm missing something, but isn't that pretty much the same question?
As an alternative, could you re-create the entire GtkNotebook every time the button is pressed?

paragasu · Familiar Face Joined: 31 Jul 2008 Posts: 44

actually, not recreate the entire gtk notebook? my mistake..
it just create a new page and append to the existing notebook every time i double click the tree view row.

ramesh · GTK+ Guru Joined: 16 Nov 2006 Posts: 270 Location: INDIA

tadeboro · Posted: Mon Oct 06, 2008 8:45 am Post subject:

Hi.

Below is some code which does approximately the same thing as your (I'm using buttons instead of treeview). If you have any questions regarding it, just ask.

Code: (C)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106

#include <gtk/gtk.h>

typedef struct _MyWid MyWid;
struct _MyWid
{
GtkWidget *notebook;
gint *content;
int max_size;
};

void
rem_page( GtkWidget *button,
MyWid *widgets )
{
gint cur_page;

cur_page = gtk_notebook_get_current_page( GTK_NOTEBOOK( widgets->notebook ) );
gtk_notebook_remove_page( GTK_NOTEBOOK( widgets->notebook ), cur_page );

*(widgets->content + cur_page) = -1;
}

void
cb_clicked( GtkWidget *button,
MyWid *widgets )
{
const gchar *string;
gint id;
register int i;
GtkWidget *del_button;
GtkWidget *label;

id = GPOINTER_TO_INT( g_object_get_data( G_OBJECT( button ), "id" ) );
for( i = 0; i < widgets->max_size; i++ )
{
if( *(widgets->content + i) == id )
return;
}

string = gtk_button_get_label( GTK_BUTTON( button ) );
label = gtk_label_new( string );

del_button = gtk_button_new_with_label( "Remove this page" );
g_signal_connect( G_OBJECT( del_button ), "clicked",
G_CALLBACK( rem_page ), widgets );

gtk_notebook_append_page( GTK_NOTEBOOK( widgets->notebook ),
del_button, label );
gtk_widget_show_all( widgets->notebook );

*(widgets->content + id) = id;
}

int
main( int argc,
char **argv )
{
GtkWidget *window;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *button;
GtkWidget *notebook;
register int i;
MyWid widgets;

char *labels[] = { "button 1", "button 2", "button 3", "button 4", "button 5" };

gtk_init( &argc, &argv );

window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
gtk_window_set_default_size( GTK_WINDOW( window ), 500, -1 );
g_signal_connect( G_OBJECT( window ), "delete-event",
G_CALLBACK( gtk_main_quit ), NULL );

hbox = gtk_hbox_new( FALSE, 5 );
gtk_container_add( GTK_CONTAINER( window ), hbox );

vbox = gtk_vbox_new( FALSE, 5 );
gtk_box_pack_start( GTK_BOX( hbox ), vbox, FALSE, TRUE, 0 );

for( i = 0; i < 5; i++ )
{
button = gtk_button_new_with_label( labels[i] );
gtk_box_pack_start( GTK_BOX( vbox ), button, FALSE, TRUE, 0 );
g_object_set_data( G_OBJECT( button ), "id", GINT_TO_POINTER( i ) );
g_signal_connect( G_OBJECT( button ), "clicked",
G_CALLBACK( cb_clicked ), &widgets );
}

widgets.content = g_malloc( sizeof( gint ) * i );
widgets.max_size = i;

for( i = 0; i < 5; i++ )
widgets.content[i] = -1;

notebook = gtk_notebook_new();
gtk_box_pack_start( GTK_BOX( hbox ), notebook, TRUE, TRUE, 0 );

widgets.notebook = notebook;

gtk_widget_show_all( window );

gtk_main();

return( 0 );
}

paragasu · Familiar Face Joined: 31 Jul 2008 Posts: 44

Code: (C)
1 2 3	*(widgets->content + cur_page) = -1;

what does the code do?

tadeboro · Posted: Mon Oct 06, 2008 5:08 pm Post subject: Re: question

paragasu · Familiar Face Joined: 31 Jul 2008 Posts: 44

tadeboro · Posted: Tue Oct 07, 2008 7:05 am Post subject:

Hi,

below is the simplest code I'm able to write and still achieves what is desired. I also added some comments, so it is easier to understand (or at least that was my intention;).

And the code:

Code: (C)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125

#include <gtk/gtk.h>

typedef struct _MyWid MyWid;
struct _MyWid
{
GtkWidget *notebook;
gboolean *content;
int max_size;
};

void
rem_page( GtkWidget *button,
MyWid *widgets )
{
gint cur_page;

/* delete current page */
cur_page = gtk_notebook_get_current_page( GTK_NOTEBOOK( widgets->notebook ) );
gtk_notebook_remove_page( GTK_NOTEBOOK( widgets->notebook ), cur_page );

/* set contents indicator to FALSE, so the corresponding button
* can again create this page.
*/
widgets->content[cur_page] = FALSE;
}

void
cb_clicked( GtkWidget *button,
MyWid *widgets )
{
const gchar *string;
gint id;
register int i;
GtkWidget *del_button;
GtkWidget *label;

/* retrieve ID number from button, calling the function */
id = GPOINTER_TO_INT( g_object_get_data( G_OBJECT( button ), "id" ) );

/* if this button has already created a page, simply return (do
* not add another page).
*/
if( widgets->content[id] == TRUE )
return;

/* Get label from button and create notebook page */
string = gtk_button_get_label( GTK_BUTTON( button ) );
label = gtk_label_new( string );

del_button = gtk_button_new_with_label( "Remove this page" );
g_signal_connect( G_OBJECT( del_button ), "clicked",
G_CALLBACK( rem_page ), widgets );

gtk_notebook_append_page( GTK_NOTEBOOK( widgets->notebook ),
del_button, label );
gtk_widget_show_all( widgets->notebook );

/* Set the content flag to TRUE (this button has already added
* it's page).
*/
widgets->content[id] = TRUE;
}

int
main( int argc,
char **argv )
{
GtkWidget *window;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *button;
GtkWidget *notebook;
register int i;
MyWid widgets;

/* labels for my buttons and notebook pages */
char *labels[] = { "button 1", "button 2", "button 3", "button 4", "button 5" };

/* init gtk and create GUI elements */
gtk_init( &argc, &argv );

window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
gtk_window_set_default_size( GTK_WINDOW( window ), 500, -1 );
g_signal_connect( G_OBJECT( window ), "delete-event",
G_CALLBACK( gtk_main_quit ), NULL );

hbox = gtk_hbox_new( FALSE, 5 );
gtk_container_add( GTK_CONTAINER( window ), hbox );

vbox = gtk_vbox_new( FALSE, 5 );
gtk_box_pack_start( GTK_BOX( hbox ), vbox, FALSE, TRUE, 0 );

for( i = 0; i < 5; i++ )
{
button = gtk_button_new_with_label( labels[i] );
gtk_box_pack_start( GTK_BOX( vbox ), button, FALSE, TRUE, 0 );

/* Assign ID number to each button, so we can distinguish them.
* This ID also tells us, where in content array to look for
* a indicator flag. First button gets ID = 0, second ID = 1 ...
*/
g_object_set_data( G_OBJECT( button ), "id", GINT_TO_POINTER( i ) );
g_signal_connect( G_OBJECT( button ), "clicked",
G_CALLBACK( cb_clicked ), &widgets );
}

/* allocate space for my tracking array */
widgets.content = g_malloc( sizeof( gboolean ) * i );
widgets.max_size = i;

/* set initial values in array to FALSE (no pages are show) */
for( i = 0; i < 5; i++ )
widgets.content[i] = FALSE;

notebook = gtk_notebook_new();
gtk_box_pack_start( GTK_BOX( hbox ), notebook, TRUE, TRUE, 0 );

widgets.notebook = notebook;

gtk_widget_show_all( window );

gtk_main();

return( 0 );
}

If you have any qusetions, just ask.