2008-07-10 03:27:56 +00:00
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<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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]>
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2007-07-11 04:46:03 +00:00
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<chapter id="gtk-migrating-tooltips">
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<title>Migrating from GtkTooltips to GtkTooltip</title>
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<para>
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GTK+ 2.12 brings a completely new tooltip implementation which
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allows many things that were not possible with the old
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#GtkTooltips interface. The new possibilities are explained
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in more detail in the section about #GtkTooltip.
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</para>
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<para>
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A number of complications of the old API have been removed:
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<itemizedlist>
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<listitem><para>
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Tooltips can not be grouped anymore. The old tooltips
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API allowed this by using multiple #GtkTooltips objects.
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We believe that the timeout behaviour of the new tooltips
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implementation is better and makes it unnecessary to use
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grouping as a way to overcome shortcomings of the
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fast-tooltips mode.
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</para></listitem>
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<listitem><para>
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Timeouts can not be set individually anymore. Instead
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there are settings #GtkSettings:gtk-tooltip-timeout,
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#GtkSettings:gtk-tooltip-browse-timeout and
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#GtkSettings:gtk-tooltip-browse-mode-timeout to influence
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the behaviour of tooltips globally.
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</para></listitem>
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</itemizedlist>
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</para>
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<para>
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Here is an example of setting a tooltip on a widget with the old API:
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<informalexample><programlisting>
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GtkTooltips *tooltips = gtk_tooltips_new ();
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gtk_tooltips_set_tip (tooltips, widget, "Some tips", NULL);
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</programlisting></informalexample>
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</para>
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<para>
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Using the new tooltips API, it is no longer necessary to create
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an object:
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<informalexample><programlisting>
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gtk_widget_set_tooltip_text (widget, "Some tips");
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</programlisting></informalexample>
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</para>
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<para>
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Similarly, setting a tooltip on a #GtkToolItem gets
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simplified from
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<informalexample><programlisting>
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gtk_tool_item_set_tooltip (toolitem, toolbar->tooltips, "tool tip", NULL);
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</programlisting></informalexample>
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to
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<informalexample><programlisting>
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gtk_tool_item_set_tooltip_text (toolitem, text);
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</programlisting></informalexample>
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</para>
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</chapter>
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