mirror of
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7953813453
Fri May 29 13:53:57 BST 1998 Tony Gale <gale@gtk.org>
* docs/gtk_tut.sgml:
- new section on Events
- change all delete_event callbacks to include
a GdkEvent parameter
- clean up the formatting
* examples - helloworld.c, helloworld2.c, notebook.c,
packbox.c, pixmap.c, progressbar.c, radiobuttons.c,
rulers.c, table.c, wheelbarrow.c: change all delete_event
callbacks to include a GdkEvent parameter.
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/* This file extracted from the GTK tutorial. */
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/* helloworld2.c */
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#include <gtk/gtk.h>
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/* Our new improved callback. The data passed to this function is printed
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* to stdout. */
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void callback (GtkWidget *widget, gpointer *data)
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{
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g_print ("Hello again - %s was pressed\n", (char *) data);
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}
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/* another callback */
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void delete_event (GtkWidget *widget, GdkEvent *event, gpointer *data)
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{
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gtk_main_quit ();
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}
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int main (int argc, char *argv[])
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{
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/* GtkWidget is the storage type for widgets */
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GtkWidget *window;
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GtkWidget *button;
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GtkWidget *box1;
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/* this is called in all GTK applications. arguments are parsed from
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* the command line and are returned to the application. */
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gtk_init (&argc, &argv);
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/* create a new window */
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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/* this is a new call, this just sets the title of our
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* new window to "Hello Buttons!" */
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gtk_window_set_title (GTK_WINDOW (window), "Hello Buttons!");
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/* Here we just set a handler for delete_event that immediately
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* exits GTK. */
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gtk_signal_connect (GTK_OBJECT (window), "delete_event",
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GTK_SIGNAL_FUNC (delete_event), NULL);
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/* sets the border width of the window. */
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gtk_container_border_width (GTK_CONTAINER (window), 10);
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/* we create a box to pack widgets into. this is described in detail
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* in the "packing" section below. The box is not really visible, it
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* is just used as a tool to arrange widgets. */
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box1 = gtk_hbox_new(FALSE, 0);
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/* put the box into the main window. */
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gtk_container_add (GTK_CONTAINER (window), box1);
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/* creates a new button with the label "Button 1". */
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button = gtk_button_new_with_label ("Button 1");
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/* Now when the button is clicked, we call the "callback" function
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* with a pointer to "button 1" as it's argument */
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gtk_signal_connect (GTK_OBJECT (button), "clicked",
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GTK_SIGNAL_FUNC (callback), (gpointer) "button 1");
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/* instead of gtk_container_add, we pack this button into the invisible
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* box, which has been packed into the window. */
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gtk_box_pack_start(GTK_BOX(box1), button, TRUE, TRUE, 0);
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/* always remember this step, this tells GTK that our preparation for
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* this button is complete, and it can be displayed now. */
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gtk_widget_show(button);
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/* do these same steps again to create a second button */
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button = gtk_button_new_with_label ("Button 2");
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/* call the same callback function with a different argument,
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* passing a pointer to "button 2" instead. */
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gtk_signal_connect (GTK_OBJECT (button), "clicked",
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GTK_SIGNAL_FUNC (callback), (gpointer) "button 2");
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gtk_box_pack_start(GTK_BOX(box1), button, TRUE, TRUE, 0);
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/* The order in which we show the buttons is not really important, but I
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* recommend showing the window last, so it all pops up at once. */
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gtk_widget_show(button);
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gtk_widget_show(box1);
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gtk_widget_show (window);
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/* rest in gtk_main and wait for the fun to begin! */
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gtk_main ();
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return 0;
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}
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