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gwenview/doc/external_tools.docbook

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<chapter id="external_tools">
<title>External tools</title>
<para>You can easily extend &kappname; by defining external tools. These tools
are accessible from the contextual popup menu which appears when
right-clicking on a thumbnail or in the image view. Look in the
<menuchoice><guimenu>External Tools</guimenu></menuchoice> entry.</para>
<para>&kappname; comes with a few predefined external tools, but it's very
easy to add more through the <guilabel>Configure External Tools</guilabel> dialog. You can open
it from <menuchoice><guimenu>Settings</guimenu><guimenuitem>Configure
External Tools...</guimenuitem></menuchoice>.
</para>
<para>Here is how it looks:
<screenshot>
<screeninfo>External tools dialog</screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="external_tools_dialog.png" format="PNG" />
</imageobject>
</mediaobject>
</screenshot>
</para>
<para>In this example, I defined an external tool which will call Exiftran to
regenerate the EXIF tags for JPEG images. Here is a more detailed description
of its definition:</para>
<itemizedlist>
<listitem>
<para>The <guilabel>Name:</guilabel> field contains the description of your
tool, has it will appear in the menu.
</para>
</listitem>
<listitem>
<para>The <guilabel>Command:</guilabel> field contains the command which
will be run when this tool is invoked.
Click on the little question mark on the right of the field to get a list
of the keywords you can use in this field. These keywords will get
expanded to the image files.
</para>
</listitem>
<listitem>
<para>
The button on the right lets you associate an icon with your tool.
</para>
</listitem>
<listitem>
<para>
The <guilabel>File Associations</guilabel> group indicates what type of
files this tool can work with. Your tool will only appear in the
<menuchoice><guimenu>External Tools</guimenu></menuchoice> menu if the
selected files are of the correct type. In my example, this tool is only
valid with JPEG images, so I choose <guilabel>Custom:</guilabel>, then
<guilabel>image/jpeg</guilabel> and <guilabel>image/pjpeg</guilabel>.
</para>
</listitem>
</itemizedlist>
<tip>
<para>You can find other external tool examples from
<ulink url="http://gwenview.sourceforge.net/tools">&kappname; web site</ulink>.
</para>
</tip>
</chapter>