I was looking at the 1.2 tutorial and their first example was hello_world.
I looked at gtk/examples/notebook.pp and tried to come up with hello_world from the C example.
I actually saved it in the lazarus-hello_world directory under the same name, so I could use the makefile.
I ran ito some trouble. About line 52, button = , produced an illegal character error.
Can anyone help?
Tom
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program testtt;
uses
glib,gdk,gtk;
procedure hello(widget : pGtkWidget ; data: pgpointer ); cdecl;
begin
writeln('Hello World');
end;
function delete_event (widget : pGtkWidget ; event: pGdkEvent; data:
pgpointer ): integer; cdecl;
begin
writeln('Delete Event Occurred\n');
delete_event := ord(true);
end;
procedure destroy(widget : pGtkWidget ; data: pgpointer ); cdecl;
begin
gtk_main_quit();
end;
var
window, button : pGtkWidget;//GtkWidget is the storage type for
widgets
begin
// 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);
// When the window is given the "delete_event" signal (this is given
// by the window manager, usually by the 'close' option, or on the
// titlebar), we ask it to call the delete_event () function
// as defined above. The data passed to the callback
// function is NULL and is ignored in the callback function.
gtk_signal_connect (pGTKOBJECT (window), 'delete_event',
GTK_SIGNAL_FUNC (@delete_event), NIL);
// Here we connect the "destroy" event to a signal handler.
// This event occurs when we call gtk_widget_destroy() on the window,
// or if we return 'FALSE' in the "delete_event" callback.
gtk_signal_connect (pGTKOBJECT (window), 'destroy',
GTK_SIGNAL_FUNC (@destroy), NULL);
// Sets the border width of the window.
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
// Creates a new button with the label "Hello World".
//button = gtk_button_new_with_label ('Hello_World');
// When the button receives the "clicked" signal, it will call the
// function hello() passing it NULL as its argument. The hello()
// function is defined above. */
// gtk_signal_connect (pGTKOBJECT (button), 'clicked',
// GTK_SIGNAL_FUNC (@hello), NULL);
// This will cause the window to be destroyed by calling
// gtk_widget_destroy(window) when "clicked". Again, the destroy
// signal could come from here, or the window manager
//gtk_signal_connect_object (pGTKOBJECT (button), 'clicked',
// GTK_SIGNAL_FUNC (gtk_widget_destroy),
// GGGTK_OBJECT(window));
// This packs the button into the window (a gtk container).
//gtk_container_add (GTK_CONTAINER (window), button);
// The final step is to display this newly created widget.
gtk_widget_show (button);
// and the window
gtk_widget_show (window);
// All GTK applications must have a gtk_main(). Control ends here
// and waits for an event to occur (like a key press or
// mouse event).
gtk_main ();
end.