From 690e34968a904e6cae6006e6a7b37a9e368ed1b0 Mon Sep 17 00:00:00 2001 From: "CST 1998 Shawn T. Amundson" Date: Mon, 23 Mar 1998 06:36:09 +0000 Subject: added this directory with stuff from the tutorial, updated to compile and Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson * examples/: added this directory with stuff from the tutorial, updated to compile and work with recent changes --- examples/helloworld2/helloworld2.c | 94 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 examples/helloworld2/helloworld2.c (limited to 'examples/helloworld2/helloworld2.c') diff --git a/examples/helloworld2/helloworld2.c b/examples/helloworld2/helloworld2.c new file mode 100644 index 0000000000..6e1ea54ac4 --- /dev/null +++ b/examples/helloworld2/helloworld2.c @@ -0,0 +1,94 @@ +/* This file extracted from the GTK tutorial. */ + +/* helloworld2.c */ + +#include + +/* Our new improved callback. The data passed to this function is printed + * to stdout. */ +void callback (GtkWidget *widget, gpointer *data) +{ + g_print ("Hello again - %s was pressed\n", (char *) data); +} + +/* another callback */ +void delete_event (GtkWidget *widget, gpointer *data) +{ + gtk_main_quit (); +} + +int main (int argc, char *argv[]) +{ + /* GtkWidget is the storage type for widgets */ + GtkWidget *window; + GtkWidget *button; + GtkWidget *box1; + + /* this is called in all GTK applications. arguments are parsed from + * the command line and are returned to the application. */ + gtk_init (&argc, &argv); + + /* create a new window */ + window = gtk_window_new (GTK_WINDOW_TOPLEVEL); + + /* this is a new call, this just sets the title of our + * new window to "Hello Buttons!" */ + gtk_window_set_title (GTK_WINDOW (window), "Hello Buttons!"); + + /* Here we just set a handler for delete_event that immediately + * exits GTK. */ + gtk_signal_connect (GTK_OBJECT (window), "delete_event", + GTK_SIGNAL_FUNC (delete_event), NULL); + + + /* sets the border width of the window. */ + gtk_container_border_width (GTK_CONTAINER (window), 10); + + /* we create a box to pack widgets into. this is described in detail + * in the "packing" section below. The box is not really visible, it + * is just used as a tool to arrange widgets. */ + box1 = gtk_hbox_new(FALSE, 0); + + /* put the box into the main window. */ + gtk_container_add (GTK_CONTAINER (window), box1); + + /* creates a new button with the label "Button 1". */ + button = gtk_button_new_with_label ("Button 1"); + + /* Now when the button is clicked, we call the "callback" function + * with a pointer to "button 1" as it's argument */ + gtk_signal_connect (GTK_OBJECT (button), "clicked", + GTK_SIGNAL_FUNC (callback), (gpointer) "button 1"); + + /* instead of gtk_container_add, we pack this button into the invisible + * box, which has been packed into the window. */ + gtk_box_pack_start(GTK_BOX(box1), button, TRUE, TRUE, 0); + + /* always remember this step, this tells GTK that our preparation for + * this button is complete, and it can be displayed now. */ + gtk_widget_show(button); + + /* do these same steps again to create a second button */ + button = gtk_button_new_with_label ("Button 2"); + + /* call the same callback function with a different argument, + * passing a pointer to "button 2" instead. */ + gtk_signal_connect (GTK_OBJECT (button), "clicked", + GTK_SIGNAL_FUNC (callback), (gpointer) "button 2"); + + gtk_box_pack_start(GTK_BOX(box1), button, TRUE, TRUE, 0); + + /* The order in which we show the buttons is not really important, but I + * recommend showing the window last, so it all pops up at once. */ + gtk_widget_show(button); + + gtk_widget_show(box1); + + gtk_widget_show (window); + + /* rest in gtk_main and wait for the fun to begin! */ + gtk_main (); + + return 0; +} + -- cgit v1.2.1