How to KIll a widget?

linux2k · **Joined:** Sun Apr 29, 2007 7:07 pm **Posts:** 3

Hey all,

Code extract:

Code:

 140 int pin_io()
  141 {
  142 GtkWidget *window;
  143 GtkWidget *mb;
  144 GtkWidget *frame;
  145 GtkWidget *vbox1;
  146 GtkWidget *hbox;
  147 GtkWidget *button;
  148 
  149 //button labels
  150 const gchar *l1,*l2,*l3,*l4,*l5,*l6,*l7,*l8,*l9;
  151 
  152 //button labels when in write mode
  153 if (rw==1)
  154 {
  155   l1="P2"; l2="P3"; l3="P4"; l4="P5"; l5="P6"; l6="P7"; l7="P8";
  156   l8="P9"; l9="N/A";
  157 
  158 }
  159 
  160 //button labels when in read mode
  161 if (rw==0)
  162 {
  163   l1="P15"; l2="P13"; l3="P12"; l4="P10"; l5="P11"; l6="P1"; l7="P14";
  164   l8="P16"; l9 = "P17";
  165 }
  166 
  167 //create pin i/o window
  168 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  169 
  170 g_signal_connect (G_OBJECT (window), "destroy",   G_CALLBACK (delete_event), NULL);
  171 
  172 //set boarder width
  173 gtk_container_set_border_width (GTK_CONTAINER (window), 12);
  174 
  175 //window title
  176 gtk_window_set_title (GTK_WINDOW (window), "Pin I/O");
  177 
  178 mb = gtk_hbox_new(FALSE, 10);
  179 gtk_container_add (GTK_CONTAINER (window), mb);
  180 
  181 
  182 vbox1 = gtk_vbox_new(FALSE, 10);
  183 gtk_box_pack_start (GTK_BOX (mb), vbox1, FALSE, FALSE, 0);
  184 
  185 
  186 //box for our labels and text
  187 hbox = gtk_hbox_new(FALSE, 0);
  188 gtk_box_pack_start (GTK_BOX (vbox1), hbox, FALSE, FALSE, 0);
  189 
  190 
  191 //Making the Pin I/O "Updates" label
  192   frame = gtk_frame_new ("Updates");
  193   label2 = gtk_label_new ("Displays current status pin status\n");
  194   gtk_container_add (GTK_CONTAINER (frame), label2);
  195   gtk_box_pack_start (GTK_BOX (vbox1), frame, FALSE, FALSE, 15);
  196 
  197 gtk_widget_show (frame);
  198 gtk_widget_show (label2);
  199 gtk_widget_show (hbox);
  200 
  201 
  202 /* the box to put the switches in            */
  203 hbox = gtk_hbox_new(FALSE, 5);
  204 /* add hbox to window                                           */
  205 gtk_box_pack_start (GTK_BOX (vbox1), hbox, FALSE, FALSE, 0);
  206 
  207 
  208 
  209  button = gtk_toggle_button_new_with_label (l1);
  210  g_signal_connect (G_OBJECT (button), "clicked",
  211                      G_CALLBACK (pin_2), NULL);
  212  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  213 
  214 
  215 
  216  button = gtk_toggle_button_new_with_label (l2);
  217  g_signal_connect (G_OBJECT (button), "clicked",
  218                      G_CALLBACK (pin_3), NULL);
  219  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  220 
  221 
  222 
  223  button = gtk_toggle_button_new_with_label (l3);
  224  g_signal_connect (G_OBJECT (button), "clicked",
  225                      G_CALLBACK (pin_4), NULL);
  226  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  227 
  228 
  229 
  230  button = gtk_toggle_button_new_with_label (l4);
  231  g_signal_connect (G_OBJECT (button), "clicked",
  232                      G_CALLBACK (pin_5), NULL);
  233  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  234 
  235 
  236 
  237  button = gtk_toggle_button_new_with_label (l5);
  238  g_signal_connect (G_OBJECT (button), "clicked",
  239                      G_CALLBACK (pin_6), NULL);
  240  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  241 
  242 
  243 
  244  button = gtk_toggle_button_new_with_label (l6);
  245  g_signal_connect (G_OBJECT (button), "clicked",
  246                      G_CALLBACK (pin_7), NULL);
  247  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  248 
  249 
  250 
  251  button = gtk_toggle_button_new_with_label (l7);
  252  g_signal_connect (G_OBJECT (button), "clicked",
  253                      G_CALLBACK (pin_8), NULL);
  254  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  255 
  256 
  257 
  258  button = gtk_toggle_button_new_with_label (l8);
  259  g_signal_connect (G_OBJECT (button), "clicked",
  260                      G_CALLBACK (pin_9), NULL);
  261  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  262 
  263  button = gtk_toggle_button_new_with_label (l9);
  264  g_signal_connect (G_OBJECT (button), "clicked",
  265                      G_CALLBACK (pin_10), NULL);
  266  gtk_box_pack_start (GTK_BOX(hbox), button,FALSE, FALSE, 3);
  267 
  268 
  269 
  [b]270  button = gtk_toggle_button_new_with_label ("Close");
  271  g_signal_connect (G_OBJECT (button), "clicked",
  272  G_CALLBACK (delete_event),  G_OBJECT (window));[/b]
  273 
  274 
  275 
  276 gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
  277 gtk_widget_show (button);
  278 
  279 
  280 gtk_widget_show_all(window);
  281 
  282 return 0;
  283 }

Towards the end of the function there is button with the label "Close". It currently points to a function that will kill the entire gtk program. However, this function (pin_io)) makes a popup window when called. When the "close" button is called, how do I make it only destroy the pin_io window and not the main gtk program?

I take we have to use gtk_widget_destroy() is some way here?

Thanks.

Micah Carrick · **Posted:** Sun Oct 14, 2007 7:47 pm

Is this pin I/O window something that will be opened and closed periodically throughout the application's lifetime? If so, rather than creating and destroying the window each time, you may want to simply create it once, and from then on simply hide and show the widget.

linux2k · **Joined:** Sun Apr 29, 2007 7:07 pm **Posts:** 3

Destroying the widget would do just fine. Would it be something like this?

button = gtk_toggle_button_new_with_label ("Close");
g_signal_connect (G_OBJECT (button), "clicked",
gtk_widget_destroy, window);

edit: I compiled with the above change. But when I hit the close button, the button destroys itself and the pin i/o window is still there.

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