Re: [gtk-list] Re: Redrawing an Object?

[Marc <marc upr41 univ-rennes1 fr>]

Frank Sweetser wrote:
> 
> 
> hi... i went off to try this (having had a similar problem), but i can't
> seem to get gtk_pixmap_new even to work.  what documentation i could find
> doesn't even match the header files, and the url to the archives someone
> else posted also doesn't work, so would a kind sould please send me a code
> snippet demonstrating this, or at least explain it a little more?
> 

Two buttons in a vbox, one with a pixmap in it...
When you click this button the pixmap changes (and the button gets
insensitive ... just for the fun) !
Hope it'll help.



/* Change Pixmap in a Button */

#include <gtk/gtk.h>

GtkWidget *window;
GtkWidget *pixmapwid;
GtkWidget *button;
GtkStyle  *style;

static char * pix1_xpm[] = {
"14 14 3 1",
"       c None",
".      c #7F7F7F",
"+      c #0019FF",
"              ",
"         .    ",
"          .   ",
" ...........  ",
" ............ ",
"              ",
"              ",
" ++++++++++++ ",
"  +++++++++++ ",
"   +          ",
"    +         ",
"              ",
"              ",
"              "};

static char * pix2_xpm[] = {
"14 14 3 1",
"       c None",
".      c #B2B2B2",
"+      c #A0A0A0",
"              ",
"         .    ",
"          .   ",
" ...........  ",
" ............ ",
"              ",
"              ",
" ++++++++++++ ",
"  +++++++++++ ",
"   +          ",
"    +         ",
"              ",
"              ",
"              "};

GtkWidget * new_pixmap (char **filename, GdkWindow *window, GdkColor
*transparent);
void ButtonClicked_callback (GtkWidget *widget, gpointer data);


GtkWidget * new_pixmap (char **filename, GdkWindow *window, GdkColor
*transparent)
{
    GtkWidget *wpixmap;
    GdkPixmap *pixmap;
    GdkBitmap *mask;

    pixmap = gdk_pixmap_create_from_xpm_d (window, &mask, transparent,
filename);
    wpixmap = gtk_pixmap_new (pixmap, mask);
    return wpixmap;
}

void ButtonClicked_callback (GtkWidget *widget, gpointer data)
{
  gtk_container_remove (GTK_CONTAINER(button), pixmapwid);
  pixmapwid = new_pixmap ((char **)pix2_xpm, window->window,
                                &style->bg[GTK_STATE_NORMAL]); 
  gtk_widget_show (pixmapwid);
  gtk_container_add (GTK_CONTAINER (button), pixmapwid );
  gtk_widget_set_state (GTK_WIDGET (button), GTK_STATE_INSENSITIVE);   
}  

int main (int argc, char *argv[])
{
  GtkWidget *main_vbox;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Change Pixmap In A
Button");
  gtk_signal_connect (GTK_OBJECT (window), "destroy",
                      GTK_SIGNAL_FUNC (gtk_main_quit), NULL);
  gtk_container_border_width (GTK_CONTAINER (window), 5);
  gtk_widget_set_usize (GTK_WIDGET (window), 250, 60);

  main_vbox = gtk_vbox_new (FALSE, 1);
  gtk_container_add (GTK_CONTAINER (window), main_vbox);
  gtk_widget_realize (window);

  button = gtk_button_new_with_label ("Quit");
  gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
  gtk_widget_show (button);
  gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
                                GTK_SIGNAL_FUNC (gtk_widget_destroy),
                                GTK_OBJECT(window) );

  style = gtk_widget_get_style (window);
  /* Pixmap Widget  */
  pixmapwid = new_pixmap ((char **)pix1_xpm, window->window,
                                &style->bg[GTK_STATE_NORMAL]);
  gtk_widget_show (pixmapwid);
  /* Button  */
  button = gtk_button_new();
  gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
  gtk_container_add (GTK_CONTAINER (button), pixmapwid );
  gtk_widget_show(button);
  gtk_signal_connect (GTK_OBJECT (button), "clicked",
                      GTK_SIGNAL_FUNC (ButtonClicked_callback), NULL);

  gtk_widget_show (main_vbox);
  gtk_widget_show (window);

  gtk_main ();
  
  return 0;

} /* end main */

-- 
Marc
** ERROR **: sigsegv caught