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add another example

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2001-12-12  Havoc Pennington  <hp@pobox.com>

	* gtk/text_widget.sgml: add another example
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Havoc Pennington 2001-12-12 06:40:08 +00:00 committed by Havoc Pennington
parent 389bc8ebad
commit 793bbc7a7f
2 changed files with 69 additions and 1 deletions
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4
docs/reference/ChangeLog
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@ -1,3 +1,7 @@
2001-12-12 Havoc Pennington <hp@pobox.com>
* gtk/text_widget.sgml: add another example
2001-12-09 Matthias Clasen <matthiasc@poet.de>
* gtk/tmpl/gtkmain.sgml: Markup fixes.

66
docs/reference/gtk/text_widget.sgml
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@ -127,7 +127,7 @@ might look like this:
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
gtk_text_buffer_set_text (buffer, "Hello, this is some text");
gtk_text_buffer_set_text (buffer, "Hello, this is some text", -1);
/* Now you might put the view in a container and display it on the
* screen; when the user edits the text, signals on the buffer
@ -143,4 +143,68 @@ gtk_text_view_set_buffer().
</refsect1>
<refsect1>
<title>Example of Changing Text Attributes</title>
<para>
There are two ways to affect text attributes in
<link linkend="GtkTextView">GtkTextView</link>.
You can change the default attributes for a given
<link linkend="GtkTextView">GtkTextView</link>, 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
<link linkend="GtkWidget">GtkWidget</link>
functions such as
<link linkend="gtk_widget_modify_font">gtk_widget_modify_font()</link>
or
<link linkend="gtk_widget_modify_fg">gtk_widget_modify_fg()</link>.
For other attributes there are dedicated methods on
<link linkend="GtkTextView">GtkTextView</link> such as
<link linkend="gtk_text_view_set_tabs">gtk_text_view_set_tabs()</link>.
<programlisting>
GtkWidget *view;
GtkTextBuffer *buffer;
PangoFontDescription *font_desc;
GdkColor color;
GtkTextTag *tag;
view = gtk_text_view_new ();
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
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_color_parse ("green", &color);
gtk_widget_modify_fg (view, GTK_STATE_NORMAL, &color);
/* Change left margin throughout the widget */
gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view), 30);
/* Use a tag to change the color for just one part of the widget */
tag = gtk_text_buffer_create_tag (buffer, "blue_foreground",
"foreground", "blue", NULL);
gtk_text_buffer_get_iter_at_offset (buffer, &start, 7);
gtk_text_buffer_get_iter_at_offset (buffer, &end, 12);
gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
</programlisting>
</para>
<para>
The <application>gtk-demo</application> application that comes with
GTK+ contains more example code for <link
linkend="GtkTextView">GtkTextView</link>.
</para>
</refsect1>
</refentry>