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add another example
2001-12-12 Havoc Pennington <hp@pobox.com> * gtk/text_widget.sgml: add another example
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@ -1,3 +1,7 @@
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2001-12-12 Havoc Pennington <hp@pobox.com>
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* gtk/text_widget.sgml: add another example
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2001-12-09 Matthias Clasen <matthiasc@poet.de>
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2001-12-09 Matthias Clasen <matthiasc@poet.de>
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* gtk/tmpl/gtkmain.sgml: Markup fixes.
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* gtk/tmpl/gtkmain.sgml: Markup fixes.
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@ -127,7 +127,7 @@ might look like this:
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
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gtk_text_buffer_set_text (buffer, "Hello, this is some text");
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gtk_text_buffer_set_text (buffer, "Hello, this is some text", -1);
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/* Now you might put the view in a container and display it on the
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/* Now you might put the view in a container and display it on the
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* screen; when the user edits the text, signals on the buffer
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* screen; when the user edits the text, signals on the buffer
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@ -143,4 +143,68 @@ gtk_text_view_set_buffer().
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</refsect1>
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</refsect1>
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<refsect1>
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<title>Example of Changing Text Attributes</title>
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<para>
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There are two ways to affect text attributes in
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<link linkend="GtkTextView">GtkTextView</link>.
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You can change the default attributes for a given
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<link linkend="GtkTextView">GtkTextView</link>, and you can
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apply tags that change the attributes for a region of text.
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For text features that come from the theme — such as
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font and foreground color &mdash use standard
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<link linkend="GtkWidget">GtkWidget</link>
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functions such as
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<link linkend="gtk_widget_modify_font">gtk_widget_modify_font()</link>
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or
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<link linkend="gtk_widget_modify_fg">gtk_widget_modify_fg()</link>.
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For other attributes there are dedicated methods on
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<link linkend="GtkTextView">GtkTextView</link> such as
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<link linkend="gtk_text_view_set_tabs">gtk_text_view_set_tabs()</link>.
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<programlisting>
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GtkWidget *view;
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GtkTextBuffer *buffer;
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PangoFontDescription *font_desc;
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GdkColor color;
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GtkTextTag *tag;
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view = gtk_text_view_new ();
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
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gtk_text_buffer_set_text (buffer, "Hello, this is some text", -1);
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/* Change default font throughout the widget */
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font_desc = pango_font_description_from_string ("Serif 15");
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gtk_widget_modify_font (view, font_desc);
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pango_font_description_free (font_desc);
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/* Change default color throughout the widget */
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gdk_color_parse ("green", &color);
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gtk_widget_modify_fg (view, GTK_STATE_NORMAL, &color);
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/* Change left margin throughout the widget */
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gtk_text_view_set_left_margin (GTK_TEXT_VIEW (view), 30);
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/* Use a tag to change the color for just one part of the widget */
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tag = gtk_text_buffer_create_tag (buffer, "blue_foreground",
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"foreground", "blue", NULL);
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gtk_text_buffer_get_iter_at_offset (buffer, &start, 7);
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gtk_text_buffer_get_iter_at_offset (buffer, &end, 12);
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gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
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</programlisting>
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</para>
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<para>
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The <application>gtk-demo</application> application that comes with
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GTK+ contains more example code for <link
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linkend="GtkTextView">GtkTextView</link>.
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</para>
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</refsect1>
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</refentry>
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</refentry>
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