<!-- ##### SECTION Title ##### -->
Key Values

<!-- ##### SECTION Short_Description ##### -->
functions for manipulating keyboard codes.

<!-- ##### SECTION Long_Description ##### -->
<para>
Key values are the codes which are sent whenever a key is pressed or released.
They appear in the <structfield>keyval</structfield> field of the
#GdkEventKey structure, which is passed to signal handlers for the
"key-press-event" and "key-release-event" signals.
The complete list of key values can be found in the &lt;gdk/gdkkeysyms.h&gt;
header file.
</para>
<para>
Key values can be converted into a string representation using
gdk_keyval_name(). The reverse function, converting a string to a key value,
is provided by gdk_keyval_from_name().
</para>
<para>
The case of key values can be determined using gdk_keyval_is_upper() and
gdk_keyval_is_lower(). Key values can be converted to upper or lower case
using gdk_keyval_to_upper() and gdk_keyval_to_lower().
</para>

<!-- ##### SECTION See_Also ##### -->
<para>

</para>

<!-- ##### FUNCTION gdk_keyval_name ##### -->
<para>
Converts a key value into a symbolic name.
The names are the same as those in the &lt;gdk/gdkkeysyms.h&gt; header file
but without the leading "GDK_".
</para>

@keyval: a key value.
@Returns: a string containing the name of the key, or NULL if @keyval is not
a valid key. The string should not be modified.


<!-- ##### FUNCTION gdk_keyval_from_name ##### -->
<para>
Converts a key name to a key value.
</para>

@keyval_name: a key name.
@Returns: the corresponding key value, or %GDK_VoidSymbol if the key name is
not a valid key.


<!-- ##### FUNCTION gdk_keyval_is_upper ##### -->
<para>
Returns TRUE if the given key value is in upper case.
</para>

@keyval: a key value.
@Returns: TRUE if @keyval is in upper case, or if @keyval is not subject to
case conversion.


<!-- ##### FUNCTION gdk_keyval_is_lower ##### -->
<para>
Returns TRUE if the given key value is in lower case.
</para>

@keyval: a key value.
@Returns: TRUE if @keyval is in lower case, or if @keyval is not subject to
case conversion.


<!-- ##### FUNCTION gdk_keyval_to_upper ##### -->
<para>
Converts a key value to upper case, if applicable.
</para>

@keyval: a key value.
@Returns: the upper case form of @keyval, or @keyval itself if it is already
in upper case or it is not subject to case conversion.


<!-- ##### FUNCTION gdk_keyval_to_lower ##### -->
<para>
Converts a key value to lower case, if applicable.
</para>

@keyval: a key value.
@Returns: the lower case form of @keyval, or @keyval itself if it is already
in lower case or it is not subject to case conversion.


