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docs: Update an example

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Pointed out in https://bugzilla.gnome.org/show_bug.cgi?id=774490
This commit is contained in:
Matthias Clasen 2016-11-17 06:17:11 -05:00
parent dbcbaac982
commit c5f6d61783
1 changed files with 19 additions and 15 deletions
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34
docs/reference/gtk/text_widget.sgml
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@ -148,13 +148,10 @@ displays after the widget is created with gtk_text_view_set_buffer().
<para>
There are two ways to affect text attributes in #GtkTextView.
You can change the default attributes for a given #GtkTextView, and you can
apply tags that change the attributes for a region of text. For text features
that come from the theme &mdash; such as font and foreground color &mdash; use
standard #GtkWidget functions such as gtk_widget_modify_font() or
gtk_widget_override_color(). For other attributes there are dedicated methods on
#GtkTextView such as gtk_text_view_set_tabs().
The way to affect text attributes in #GtkTextView is to
apply tags that change the attributes for a region of text.
For text features that come from the theme &mdash; such as font and
foreground color &mdash; use CSS to override their default values.
<informalexample><programlisting>
GtkWidget *view;
@ -163,6 +160,8 @@ gtk_widget_override_color(). For other attributes there are dedicated methods on
PangoFontDescription *font_desc;
GdkRGBA rgba;
GtkTextTag *tag;
GtkCssProvider *provider;
GtkStyleContext *context;
view = gtk_text_view_new (<!-- -->);
@ -170,14 +169,19 @@ gtk_widget_override_color(). For other attributes there are dedicated methods on
gtk_text_buffer_set_text (buffer, "Hello, this is some text", -1);
/* Change default font throughout the widget */
font_desc = pango_font_description_from_string ("Serif 15");
gtk_widget_modify_font (view, font_desc);
pango_font_description_free (font_desc);
/* Change default color throughout the widget */
gdk_rgba_parse ("green", &amp;rgba);
gtk_widget_override_color (view, GTK_STATE_FLAG_NORMAL, &amp;rgba);
/* Change default font and color throughout the widget */
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider,
"textview {"
" font: 15 serif;"
" color: green;"
"}",
-1,
NULL);
context = gtk_widget_get_style_context (view);
gtk_style_context_add_provider (context,
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
/* Change left margin throughout the widget */
gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view), 30);