mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-27 14:10:30 +00:00
386b63b85d
In 99.9% of all cases, these are just NULL, NULL. So just do away with these arguments, people can use the setters for the rare cases where they want the scrolled window to use a different adjustment.
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/* Theming/CSS Basics
|
|
*
|
|
* Gtk themes are written using CSS. Every widget is build of multiple items
|
|
* that you can style very similarly to a regular website.
|
|
*
|
|
*/
|
|
|
|
#include <gtk/gtk.h>
|
|
|
|
static void
|
|
show_parsing_error (GtkCssProvider *provider,
|
|
GtkCssSection *section,
|
|
const GError *error,
|
|
GtkTextBuffer *buffer)
|
|
{
|
|
const GtkCssLocation *start_location, *end_location;
|
|
GtkTextIter start, end;
|
|
const char *tag_name;
|
|
|
|
start_location = gtk_css_section_get_start_location (section);
|
|
gtk_text_buffer_get_iter_at_line_index (buffer,
|
|
&start,
|
|
start_location->lines,
|
|
start_location->line_bytes);
|
|
end_location = gtk_css_section_get_end_location (section);
|
|
gtk_text_buffer_get_iter_at_line_index (buffer,
|
|
&end,
|
|
end_location->lines,
|
|
end_location->line_bytes);
|
|
|
|
if (error->domain == GTK_CSS_PARSER_WARNING)
|
|
tag_name = "warning";
|
|
else
|
|
tag_name = "error";
|
|
|
|
gtk_text_buffer_apply_tag_by_name (buffer, tag_name, &start, &end);
|
|
}
|
|
|
|
static void
|
|
css_text_changed (GtkTextBuffer *buffer,
|
|
GtkCssProvider *provider)
|
|
{
|
|
GtkTextIter start, end;
|
|
char *text;
|
|
|
|
gtk_text_buffer_get_start_iter (buffer, &start);
|
|
gtk_text_buffer_get_end_iter (buffer, &end);
|
|
gtk_text_buffer_remove_all_tags (buffer, &start, &end);
|
|
|
|
text = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
|
|
gtk_css_provider_load_from_data (provider, text, -1);
|
|
g_free (text);
|
|
}
|
|
|
|
static void
|
|
apply_css (GtkWidget *widget, GtkStyleProvider *provider)
|
|
{
|
|
GtkWidget *child;
|
|
|
|
gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
|
|
for (child = gtk_widget_get_first_child (widget);
|
|
child != NULL;
|
|
child = gtk_widget_get_next_sibling (child))
|
|
apply_css (child, provider);
|
|
}
|
|
|
|
GtkWidget *
|
|
do_css_basics (GtkWidget *do_widget)
|
|
{
|
|
static GtkWidget *window = NULL;
|
|
|
|
if (!window)
|
|
{
|
|
GtkWidget *container, *child;
|
|
GtkStyleProvider *provider;
|
|
GtkTextBuffer *text;
|
|
GBytes *bytes;
|
|
|
|
window = gtk_window_new ();
|
|
gtk_window_set_title (GTK_WINDOW (window), "CSS Basics");
|
|
gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
|
|
gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
|
|
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
|
|
|
|
text = gtk_text_buffer_new (NULL);
|
|
gtk_text_buffer_create_tag (text,
|
|
"warning",
|
|
"underline", PANGO_UNDERLINE_SINGLE,
|
|
NULL);
|
|
gtk_text_buffer_create_tag (text,
|
|
"error",
|
|
"underline", PANGO_UNDERLINE_ERROR,
|
|
NULL);
|
|
|
|
provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
|
|
|
|
container = gtk_scrolled_window_new ();
|
|
gtk_window_set_child (GTK_WINDOW (window), container);
|
|
child = gtk_text_view_new_with_buffer (text);
|
|
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
|
|
g_signal_connect (text, "changed",
|
|
G_CALLBACK (css_text_changed), provider);
|
|
|
|
bytes = g_resources_lookup_data ("/css_basics/css_basics.css", 0, NULL);
|
|
gtk_text_buffer_set_text (text, g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes));
|
|
g_bytes_unref (bytes);
|
|
|
|
g_signal_connect (provider,
|
|
"parsing-error",
|
|
G_CALLBACK (show_parsing_error),
|
|
gtk_text_view_get_buffer (GTK_TEXT_VIEW (child)));
|
|
|
|
apply_css (window, provider);
|
|
}
|
|
|
|
if (!gtk_widget_get_visible (window))
|
|
gtk_widget_show (window);
|
|
else
|
|
gtk_window_destroy (GTK_WINDOW (window));
|
|
|
|
return window;
|
|
}
|