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GtkCombobox with glade3

 
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Fri Aug 08, 2008 9:21 am    Post subject: GtkCombobox with glade3 Reply with quote
Hello, for my computer science training (I'm French sorry for my English), I need to create an simple interface to use a professional scanner (Approximately interface like Gnome-Scan). For that my partner an I use Glade3 for the interface and Sane api for the scanner.
But I have some problems so some questions :
Let see the interface I create with glade,



So I have 7 Comboboxes on the left, first question :

When I click on "Numériser" I want have in a structure, all the choice (option for scan) there is in Combobox to send to my scan function.

Other question:

How can I send parameters to a function called by glade (I put the name of the function in SIGNAL but I don't know where put the parameters) ?

Last question:

How can I put a default choice (I want put the first one) in my Comboboxes when my interface appear ?

Thanks a lot.

Edit: I'm programming in C.

Last edited by Dewey on Fri Aug 08, 2008 1:56 pm; edited 1 time in total
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tadeboro
Never Seen the Sunlight


Joined: 23 Jul 2008
Posts: 374
Location: Slovenia
PostPosted: Fri Aug 08, 2008 10:11 am    Post subject: Re: GtkCombobox with glade3 Reply with quote
Hello

Dewey wrote:
When I click on "Numériser" I want have in a structure with all the choice (option for scan) there is in Combobox to send to my scan function.

Usually, when I need to track the selection of the combo boxes, I create structure inside main function and then update it from combo callback. When I need all the options, selected inside combos, I simply take my structure and I'm done.

Example:
Code: (C)
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/* structure definition */
typedef struct
{
    char *combo1;
    char *combo2;
    char *combo3;
} SOptions;


int
main( int    argc,
      char **argv )
{
    GtkWidget *combo;
    SOptions   options;
   
    /* create widgets here */
   
    g_signal_connect( G_OBJECT( combo ), 'changed',
                      G_CALLBACK( cb_changed ),
                      (gpointer)options.combo1 );
   
    /* do other suff here */
    return( 0);
}

void
cb_changed ( GtkComboBox *combo,
             gpointer     option )
{
    GtkTreeIter iter;
    GtkTreeModel *model;
   
    /* free any previous options */
    if( option ) {
        gfree( option );
    }
   
    /* call this if your combo box is created with model */
    gtk_combo_box_get_model( combo, model );
    gtk_combo_box_get_active_iter( combo, &iter );
    gtk_tree_model_get( model, &iter, 0, &option, -1 );
   
    /* call this if your combo box is created with text */
    option = gtk_combo_box_get_active_text( combo );
}


Dewey wrote:
How can I send parameters to a function called by glade (I put the name of the function in SIGNAL but I don't know where put the parameters) ?

Since I don't use Glade, I won't be much of a help here. Sorry.

Dewey wrote:
How can I put a default choice (I want put the first one) in my Comboboxes when my interface appear ?

I would simply call gtk_combo_box_set_active() function. And if you have connected combo box callback before this call, your options struct will also get updated.

Hope it helps you a bit.

Tadej
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Mon Aug 11, 2008 7:12 am    Post subject: Reply with quote
Thank you for the answer !
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Tue Aug 12, 2008 12:20 pm    Post subject: Reply with quote
New question :
I put an image in a gtkwindow and I want to rotate it with 2 buttons (right and left rotate).
Is it possible ?
If yes, which way ?
thanks
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Micah Carrick
Never Seen the Sunlight


Joined: 21 Sep 2005
Posts: 514
Location: Portland, OR USA
PostPosted: Tue Aug 12, 2008 4:18 pm    Post subject: Reply with quote
Check out gdk_pixbuf_rotate_simple() function.
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Wed Aug 13, 2008 9:24 am    Post subject: Reply with quote
Micah Carrick wrote:
Check out gdk_pixbuf_rotate_simple() function.

I found that this morning before see your message, thank you Micah.
It works good, but now my problem is to replace the old image bye the new (the rotate image).
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Wed Aug 13, 2008 12:57 pm    Post subject: Reply with quote
Before rotate:



After 90° rotate:



Is it normal ?
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Tue Aug 19, 2008 1:15 pm    Post subject: Reply with quote
up
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dreblen
Never Seen the Sunlight


Joined: 14 Jun 2007
Posts: 638
Location: Falun, WI USA
PostPosted: Tue Aug 19, 2008 5:02 pm    Post subject: Reply with quote
it looks normal to me. what do you think isn't normal?
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Dewey
Familiar Face


Joined: 08 Aug 2008
Posts: 8
PostPosted: Thu Aug 21, 2008 8:13 am    Post subject: Reply with quote
dreblen wrote:
it looks normal to me. what do you think isn't normal?

In fact, when I rotate by 90°, the height of the image seems to be modify (more long).
But I find the solution/ the screen resolution -_-
THanks a lot fot this topic, bye
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ramesh
GTK+ Guru


Joined: 16 Nov 2006
Posts: 201
Location: INDIA
PostPosted: Thu Aug 21, 2008 10:22 am    Post subject: Reply with quote
Micah Carrick wrote:
Check out gdk_pixbuf_rotate_simple() function.


can i have an example program for this
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dreblen
Never Seen the Sunlight


Joined: 14 Jun 2007
Posts: 638
Location: Falun, WI USA
PostPosted: Thu Aug 21, 2008 3:47 pm    Post subject: Reply with quote
It's pretty straightforward, and you can find its documentation here:
http://library.gnome.org/devel/gdk-pixbuf/stable/gdk-pixbuf-scaling.html#gdk-pixbuf-rotate-simple
but here's an example:
Code: (C)
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#include <gtk/gtk.h>

static const struct
{
    gchar *name;
    gchar *pattern;
} chooser_filters[] = {
    { "All Files (*)", "*" },
    { "PNG Files (*.png)", "*.png" },
    { "JPEG Files (*.jpg)", "*.jpg" },
    { "BMP Files (*.bmp)", "*.bmp" },
};

void file_set_cb(GtkFileChooserButton *but, GtkImage *im)
{
    gchar *filename;

    filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(but));

    gtk_image_set_from_file(im, filename);
}

void rot_left(GtkWidget *but, GtkImage *im)
{
    GdkPixbuf *pbuf;

    pbuf = gtk_image_get_pixbuf(im);
    if(pbuf == NULL)
        return;

    pbuf = gdk_pixbuf_rotate_simple(pbuf, GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE);

    gtk_image_set_from_pixbuf(im, pbuf);
}

void rot_right(GtkWidget *but, GtkImage *im)
{
    GdkPixbuf *pbuf;

    pbuf = gtk_image_get_pixbuf(im);
    if(pbuf == NULL)
        return;

    pbuf = gdk_pixbuf_rotate_simple(pbuf, GDK_PIXBUF_ROTATE_CLOCKWISE);

    gtk_image_set_from_pixbuf(im, pbuf);
}

int main(int argc, char **argv)
{
    GtkWidget *win;
    GtkWidget *vbox;
    GtkWidget *button;
    GtkWidget *swin;
    GtkWidget *image;
    GtkWidget *hbox;

    GtkFileFilter *fil;
    gint i;

    gtk_init(&argc, &argv);

    win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(G_OBJECT(win), "delete-event", G_CALLBACK(gtk_main_quit), NULL);

    vbox = gtk_vbox_new(FALSE, 5);
    gtk_container_add(GTK_CONTAINER(win), vbox);
    gtk_widget_show(vbox);

    button = gtk_file_chooser_button_new("Select File", GTK_FILE_CHOOSER_ACTION_OPEN);
    gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, FALSE, 0);
    gtk_widget_show(button);
    for(i = 0; i < G_N_ELEMENTS(chooser_filters); i++)
    {
        fil = gtk_file_filter_new();
        gtk_file_filter_set_name(fil, chooser_filters[i].name);
        gtk_file_filter_add_pattern(fil, chooser_filters[i].pattern);
        gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(button), fil);
    }

    swin = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(swin), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_box_pack_start(GTK_BOX(vbox), swin, TRUE, TRUE, 0);
    gtk_widget_show(swin);

    image = gtk_image_new();
    gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(swin), image);
    gtk_widget_show(image);

    /* connect "file-set" of button now that we have image */
    g_signal_connect(G_OBJECT(button), "file-set", G_CALLBACK(file_set_cb), (gpointer)image);

    hbox = gtk_hbox_new(TRUE, 2);
    gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
    gtk_widget_show(hbox);

    button = gtk_button_new_with_label("Rotate Left");
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(rot_left), (gpointer)image);
    gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);
    gtk_widget_show(button);

    button = gtk_button_new_with_label("Rotate Right");
    g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(rot_right), (gpointer)image);
    gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);
    gtk_widget_show(button);

    gtk_widget_show(win);

    gtk_main();

    return 0;
}
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ramesh
GTK+ Guru


Joined: 16 Nov 2006
Posts: 201
Location: INDIA
PostPosted: Fri Aug 22, 2008 3:51 am    Post subject: Reply with quote
thats great.
working fine.
can i add slide transition for the image and
can i give orientation to the window.
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dreblen
Never Seen the Sunlight


Joined: 14 Jun 2007
Posts: 638
Location: Falun, WI USA
PostPosted: Fri Aug 22, 2008 4:06 am    Post subject: Reply with quote
I would politely suggest that you start your own thread if you have more questions,
seeing as how they aren't really relating to the OP anymore.

Anyways, regarding question 1:
you've already started a thread (which I've answered) on this subject
http://gtkforums.com/viewtopic.php?t=1640
question 2:
what do you mean by orientation? do you mean rotate the window?
if so, then I believe that the answer is no because that would be something handled by the window manager
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