GTK v1.2 Tutorial(英文)
来源：Linux-cn.com
作者：Webmaster
时间：2007-05-05
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In fact not all of the above widgets are needed here, but to make things clearer I put them all together.
/* that's easy... when one of the buttons is toggled, we just
* check which one is active and set the style of the toolbar
* accordingly
* ATTENTION: our toolbar is passed as data to callback ! */
void radio_event (GtkWidget *widget, gpointer data)
{
if (GTK_TOGGLE_BUTTON (text_button)->active)
gtk_toolbar_set_style(GTK_TOOLBAR ( data ), GTK_TOOLBAR_TEXT);
else if (GTK_TOGGLE_BUTTON (icon_button)->active)
gtk_toolbar_set_style(GTK_TOOLBAR ( data ), GTK_TOOLBAR_ICONS);
else if (GTK_TOGGLE_BUTTON (both_button)->active)
gtk_toolbar_set_style(GTK_TOOLBAR ( data ), GTK_TOOLBAR_BOTH);
}
/* even easier, just check given toggle button and enable/disable
* tooltips */
void toggle_event (GtkWidget *widget, gpointer data)
{
gtk_toolbar_set_tooltips (GTK_TOOLBAR ( data ),
GTK_TOGGLE_BUTTON (widget)->active );
}
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The above are just two callback functions that will be called when one of the buttons on a toolbar is pressed. You should already be familiar with things like this if you've already used toggle buttons (and radio buttons).
int main (int argc, char *argv[])
{
/* Here is our main window (a dialog) and a handle for the handlebox */
GtkWidget* dialog;
GtkWidget* handlebox;
/* Ok, we need a toolbar, an icon with a mask (one for all of
the buttons) and an icon widget to put this icon in (but
we'll create a separate widget for each button) */
GtkWidget * toolbar;
GdkPixmap * icon;
GdkBitmap * mask;
GtkWidget * iconw;
/* this is called in all GTK application. */
gtk_init (&argc, &argv);
/* create a new window with a given title, and nice size */
dialog = gtk_dialog_new ();
gtk_window_set_title ( GTK_WINDOW ( dialog ) , "GTKToolbar Tutorial");
gtk_widget_set_usize( GTK_WIDGET ( dialog ) , 600 , 300 );
GTK_WINDOW ( dialog ) ->allow_shrink = TRUE;
/* typically we quit if someone tries to close us */
gtk_signal_connect ( GTK_OBJECT ( dialog ), "delete_event",
GTK_SIGNAL_FUNC ( delete_event ), NULL);
/* we need to realize the window because we use pixmaps for
* items on the toolbar in the context of it */
gtk_widget_realize ( dialog );
/* to make it nice we'll put the toolbar into the handle box,
* so that it can be detached from the main window */
handlebox = gtk_handle_box_new ();
gtk_box_pack_start ( GTK_BOX ( GTK_DIALOG(dialog)->vbox ),
handlebox, FALSE, FALSE, 5 );
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The above should be similar to any other GTK application. Just initialization of GTK, creating the window, etc. There is only one thing that probably needs some explanation: a handle box. A handle box is just another box that can be used to pack widgets in to. The difference between it and typical boxes is that it can be detached from a parent window (or, in fact, the handle box remains in the parent, but it is reduced to a very small rectangle, while all of its contents are reparented to a new freely floating window). It is usually nice to have a detachable toolbar, so these two widgets occur together quite often.
/* toolbar will be horizontal, with both icons and text, and
* with 5pxl spaces between items and finally,
* we'll also put it into our handlebox */
toolbar = gtk_toolbar_new ( GTK_ORIENTATION_HORIZONTAL,GTK_TOOLBAR_BOTH );
gtk_container_set_border_width ( GTK_CONTAINER ( toolbar ) , 5 );
gtk_toolbar_set_space_size ( GTK_TOOLBAR ( toolbar ), 5 );
gtk_container_add ( GTK_CONTAINER ( handlebox ) , toolbar );
/* now we create icon with mask: we'll reuse it to create
* icon widgets for toolbar items */
icon = gdk_pixmap_create_from_xpm_d ( dialog->window, &mask,
&dialog->style->white, gtk_xpm );
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Well, what we do above is just a straightforward initialization of the toolbar widget and creation of a GDK pixmap with its mask. If you want to know something more about using pixmaps, refer to GDK documentation or to the Pixmaps section earlier in this tutorial.
/* our first item is <close> button */
iconw = gtk_pixmap_new ( icon, mask ); /* icon widget */
close_button =
gtk_toolbar_append_item ( GTK_TOOLBAR (toolbar), /* our toolbar */
"Close", /* button label */
"Closes this app", /* this button's tooltip */
"Private", /* tooltip private info */
iconw, /* icon widget */
GTK_SIGNAL_FUNC (delete_event), /* a signal */
NULL );
gtk_toolbar_append_space (GTK_TOOLBAR(toolbar)); /* space after item */
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In the above code you see the simplest case: adding a button to toolbar. Just before appending a new item, we have to construct a pixmap widget to serve as an icon for this item; this step will have to be repeated for each new item. Just after the item we also add a space, so the following items will not touch each other. As you see gtk_toolbar_append_item returns a pointer to our newly created button widget, so that we can work with it in the normal way.
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