Re: changing icon of button on toolbar

[Emmanuel Gravel <e_gravel yahoo com>]

There's an easier way to do this. I've created a bit
of code, both in C and C++, that cycles through button
icons when you press on the button. I can't remember
where I got the base code for this but I'm sure it's
in one of the available tutorials on the net. All I
did
was set a callback function that used a static
variable
that I would change each time and check for. Then I'd
just re-create the pixmap each time, no destruction
necessary.

Here's the code:

#include <gtk/gtk.h>

/* Our usual callback function */
void callback( GtkWidget *widget,
               gpointer   data )
{
  static int i=0;

  GtkWidget *pix;
  GdkPixmap *pixmap;
  GdkBitmap *mask;

  pix = GTK_WIDGET(data);

  if (i==0)
    pixmap = gdk_pixmap_create_from_xpm
(widget->window,
                                         &mask,
                                         NULL,
                                         "stop.xpm");
  else if (i==1)
    pixmap = gdk_pixmap_create_from_xpm
(widget->window,
                                         &mask,
                                         NULL,
                                         "start.xpm");
  else
    g_print("Can't get pixmap\n");

  gtk_pixmap_set
(GTK_PIXMAP(widget->button->pixmapwid), pixmap, mask);

  gtk_widget_show(widget->button->pixmapwid);

  if (i==0)
    i=1;
  else
    i=0;
}

int main( int   argc,
          char *argv[] )
{
  /* GtkWidget is the storage type for widgets */
  GtkWidget *window;
  GtkWidget *button;
  GtkWidget *pixmapwid;
  GdkPixmap *pixmap;
  GdkBitmap *mask;
  GtkStyle *style;
  
  gtk_init (&argc, &argv);
  
  /* Create a new window */
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  
  gtk_window_set_title (GTK_WINDOW (window), "Pixmap'd
Buttons!");
  
  /* It's a good idea to do this for all windows. */
  gtk_signal_connect (GTK_OBJECT (window), "destroy",
                      GTK_SIGNAL_FUNC (gtk_exit), NULL);
  
  gtk_signal_connect (GTK_OBJECT (window),
"delete_event",
                      GTK_SIGNAL_FUNC (gtk_exit), NULL);
  
  /* Sets the border width of the window. */
  gtk_container_set_border_width (GTK_CONTAINER
(window), 10);
  gtk_widget_realize(window);
  
  /* Create a new button */
  button = gtk_button_new ();
  
  /* Get the style of the button to get the
   * background color. */
  style = gtk_widget_get_style(window);
  
  /* Now on to the xpm stuff */
  pixmap = gdk_pixmap_create_from_xpm (window->window,
&mask,
                                       &style->bg[GTK_STATE_NORMAL],
                                       "start.xpm");
  pixmapwid = gtk_pixmap_new (pixmap, mask);
  
  /* Connect the "clicked" signal of the button to our
callback */
  gtk_signal_connect (GTK_OBJECT (button), "clicked",
                      GTK_SIGNAL_FUNC (callback), (gpointer)
pixmapwid);
  
  gtk_widget_show(pixmapwid);

  /* Pack and show all our widgets */
  gtk_container_add (GTK_CONTAINER (button),
pixmapwid);
  
  gtk_widget_show(button);
  
  gtk_container_add (GTK_CONTAINER (window), button);
  
  gtk_widget_show (window);
  
  /* Rest in gtk_main and wait for the fun to begin!
*/
  gtk_main ();
  
  return(0);
}

Hope this helps!

Manu



--- Ben Dougherty <benjamind miles33 co uk> wrote:
> Carn't you hide or destroy the pixmap widget and
> show/create the other
> one? I believe an icon is just a GtkWidget which has
> been created from
> a GdkPixmap and then added to the button.
> As a GtkButton is a container so you could add a
> hbox container into
> the button then pack as many gtkpixmaps as you want
> into the box then
> show/hide the pixmap you want.
>
> Ben.
> "Dennis L. Goyette Sr." wrote:
> > The way I was able to do it was to remove
> (gtk_widget_destroy()) the
> > button, then toolbar, and then rebuild both.  It
> works but seems like so
> > much work when all I want to do is change the icon
> associated with the
> > button...... any better ways???
> >
> > Dennis L. Goyette Sr. wrote:
> >
> > > How do I change the icon associated with a
> button in a toolbar??  I
> > > want to change the icon based on another button
> that is
> > > clicked/pressed after a popup window containing
> a toolbar with button
> > > icons comes up.  The button that is clicked on
> in the popup
> > > window/toolbar is the one that is to replace
> another button icon....
> > > Dennis
> > >
> > >
> > > _______________________________________________
> > > gtk-app-devel-list mailing list
> > > gtk-app-devel-list gnome org
http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
> > >
> >
> > _______________________________________________
> > gtk-app-devel-list mailing list
> > gtk-app-devel-list gnome org
http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list


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