repo_zf1/documentation/manual/en/module_specs/Zend_Pdf-InteractiveFeatures.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Reviewed: no -->
<sect1 id="zend.pdf.interactive-features">
    <title>Interactive Features</title>
    <sect2 id="zend.pdf.pages.interactive-features.destinations">
        <title>Destinations</title>
        
        <para>
            A destination defines a particular view of a document, consisting of the following 
            items:
            <itemizedlist>
                <listitem>
                    <para>The page of the document to be displayed.</para>
                </listitem>
                
                <listitem>
                    <para>The location of the document window on that page.</para>
                </listitem>
                
                <listitem>
                    <para>The magnification (zoom) factor to use when displaying the page.</para>
                </listitem>
            </itemizedlist>
            Destinations may be associated with outline items (<xref 
            linkend="zend.pdf.pages.interactive-features.outlines" />), annotations
            (<xref linkend="zend.pdf.pages.interactive-features.annotations" />), or actions 
            (<xref linkend="zend.pdf.pages.interactive-features.actions" />). In each case, 
            the destination specifies the view of the document to be presented when the outline 
            item or annotation is opened or the action is performed. In addition, the optional 
            document open action can be specified. 
        </para>

        <sect3 id="zend.pdf.pages.interactive-features.destinations.types">
            <title>Supported Destination Types</title>
            
            <para>
                The following types are supported by Zend_Pdf component.
            </para>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.zoom">
            <title>Zend_Pdf_Destination_Zoom</title>
                <para>
                    Display the specified page, with the coordinates (left, top) positioned at 
                    the upper-left corner of the window and the contents of the page magnified 
                    by the factor zoom.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_Zoom::create($page, $left = null, $top = null, $zoom = null)</methodname>
                    method.
                </para>
                
                <para>
                    Where
                    <itemizedlist>
                        <listitem>
                            <para>
                                <varname>$page</varname> is a destination page 
                                (a <classname>Zend_Pdf_Page</classname> object or a page number).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$left</varname> is a left edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$top</varname> is a top edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$zoom</varname> is a zoom factor (float).
                            </para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                   <code>null</code>, specified for <varname>$left</varname>, 
                   <varname>$top</varname> or <varname>$zoom</varname> parameter means 
                   "current viewer application value".
                </para>
                
                <para>
                    <classname>Zend_Pdf_Destination_Zoom</classname> class also provides 
                    the following methods:
                    <itemizedlist>
                        <listitem>
                            <para><methodname>float getLeftEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setLeftEdge(float $left)</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>float getTopEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setTopEdge(float $top)</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>float getZoomFactor()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>float getZoomFactor()</methodname>;</para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                    <methodname>setZoomFactor(float $zoom)</methodname>;
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit">
            <title>Zend_Pdf_Destination_Fit</title>
                <para>
                    Display the specified page, with the coordinates (left, top) positioned at 
                    the upper-left corner of the window and the contents of the page magnified 
                    by the factor zoom.
                    Display the specified page, with its contents magnified just enough to fit 
                    the entire page within the window both horizontally and vertically. If 
                    the required horizontal and vertical magnification factors are different, use 
                    the smaller of the two, centering the page within the window in the other 
                    dimension.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_Fit::create($page)</methodname>
                    method.
                </para>
                
                <para>
                    Where <varname>$page</varname> is a destination page 
                    (a <classname>Zend_Pdf_Page</classname> object or a page number).
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit-horizontally">
            <title>Zend_Pdf_Destination_FitHorizontally</title>
                <para>
                    Display the specified page, with the vertical coordinate top positioned at 
                    the top edge of the window and the contents of the page magnified just enough 
                    to fit the entire width of the page within the window.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_FitHorizontally::create($page, $top)</methodname>
                    method.
                </para>
                
                <para>
                    Where
                    <itemizedlist>
                        <listitem>
                            <para>
                                <varname>$page</varname> is a destination page 
                                (a <classname>Zend_Pdf_Page</classname> object or a page number).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$top</varname> is a top edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                    <classname>Zend_Pdf_Destination_FitHorizontally</classname> class also 
                    provides the following methods:
                    <itemizedlist>
                        <listitem>
                            <para><methodname>float getTopEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setTopEdge(float $top)</methodname>;</para>
                        </listitem>
                    </itemizedlist>
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit-vertically">
            <title>Zend_Pdf_Destination_FitVertically</title>
                <para>
                    Display the specified page, with the horizontal coordinate left positioned 
                    at the left edge of the window and the contents of the page magnified just 
                    enough to fit the entire height of the page within the window.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_FitVertically::create($page, $left)</methodname>
                    method.
                </para>
                
                <para>
                    Where
                    <itemizedlist>
                        <listitem>
                            <para>
                                <varname>$page</varname> is a destination page 
                                (a <classname>Zend_Pdf_Page</classname> object or a page number).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$left</varname> is a left edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                    <classname>Zend_Pdf_Destination_FitVertically</classname> class also 
                    provides the following methods:
                    <itemizedlist>
                        <listitem>
                            <para><methodname>float getLeftEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setLeftEdge(float $left)</methodname>;</para>
                        </listitem>
                    </itemizedlist>
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit-rectangle">
            <title>Zend_Pdf_Destination_FitRectangle</title>
                <para>
                    Display the specified page, with its contents magnified just enough to fit 
                    the rectangle specified by the coordinates left, bottom, right, and top 
                    entirely within the window both horizontally and vertically. If the required 
                    horizontal and vertical magnification factors are different, use the smaller 
                    of the two, centering the rectangle within the window in the other dimension.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_FitRectangle::create($page, $left, $bottom, $right, $top)</methodname>
                    method.
                </para>
                
                <para>
                    Where
                    <itemizedlist>
                        <listitem>
                            <para>
                                <varname>$page</varname> is a destination page 
                                (a <classname>Zend_Pdf_Page</classname> object or a page number).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$left</varname> is a left edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$bottom</varname> is a bottom edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$right</varname> is a right edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$top</varname> is a top edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                    <classname>Zend_Pdf_Destination_FitRectangle</classname> class also 
                    provides the following methods:
                    <itemizedlist>
                        <listitem>
                            <para><methodname>float getLeftEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setLeftEdge(float $left)</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>float getBottomEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setBottomEdge(float $bottom)</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>float getRightEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setRightEdge(float $right)</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>float getTopEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setTopEdge(float $top)</methodname>;</para>
                        </listitem>
                    </itemizedlist>
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit-bounding-box">
            <title>Zend_Pdf_Destination_FitBoundingBox</title>
                <para>
                    Display the specified page, with its contents magnified just enough to fit 
                    its bounding box entirely within the window both horizontally and vertically. 
                    If the required horizontal and vertical magnification factors are different, 
                    use the smaller of the two, centering the bounding box within the window in 
                    the other dimension.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_FitBoundingBox::create($page, $left, $bottom, $right, $top)</methodname>
                    method.
                </para>
                
                <para>
                    Where <varname>$page</varname> is a destination page 
                    (a <classname>Zend_Pdf_Page</classname> object or a page number).
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit-bounding-box-horizontally">
            <title>Zend_Pdf_Destination_FitBoundingBoxHorizontally</title>
                <para>
                    Display the specified page, with the vertical coordinate top positioned at 
                    the top edge of the window and the contents of the page magnified just enough 
                    to fit the entire width of its bounding box within the window.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_FitBoundingBoxHorizontally::create($page, $top)</methodname>
                    method.
                </para>
                
                <para>
                    Where
                    <itemizedlist>
                        <listitem>
                            <para>
                                <varname>$page</varname> is a destination page 
                                (a <classname>Zend_Pdf_Page</classname> object or a page number).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$top</varname> is a top edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                    <classname>Zend_Pdf_Destination_FitBoundingBoxHorizontally</classname> class 
                    also provides the following methods:
                    <itemizedlist>
                        <listitem>
                            <para><methodname>float getTopEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setTopEdge(float $top)</methodname>;</para>
                        </listitem>
                    </itemizedlist>
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.fit-bounding-box-vertically">
            <title>Zend_Pdf_Destination_FitBoundingBoxVertically</title>
                <para>
                    Display the specified page, with the horizontal coordinate left positioned at 
                    the left edge of the window and the contents of the page magnified just 
                    enough to fit the entire height of its bounding box within the window.
                </para>
                
                <para>
                    Destination object may be created using 
                    <methodname>Zend_Pdf_Destination_FitBoundingBoxVertically::create($page, $left)</methodname>
                    method.
                </para>
                
                <para>
                    Where
                    <itemizedlist>
                        <listitem>
                            <para>
                                <varname>$page</varname> is a destination page 
                                (a <classname>Zend_Pdf_Page</classname> object or a page number).
                            </para>
                        </listitem>
                        
                        <listitem>
                            <para>
                                <varname>$left</varname> is a left edge of the displayed page 
                                (float).
                            </para>
                        </listitem>
                    </itemizedlist>
                </para>

                <para>
                    <classname>Zend_Pdf_Destination_FitBoundingBoxVertically</classname> class 
                    also provides the following methods:
                    <itemizedlist>
                        <listitem>
                            <para><methodname>float getLeftEdge()</methodname>;</para>
                        </listitem>
                        
                        <listitem>
                            <para><methodname>setLeftEdge(float $left)</methodname>;</para>
                        </listitem>
                    </itemizedlist>
                </para>
            </sect4>

            <sect4 id="zend.pdf.pages.interactive-features.destinations.types.named">
            <title>Zend_Pdf_Destination_Named</title>
                <para>
                    All destinations listed above are "Explicit Destinations".
                </para>

                <para>
                    In addition to this, PDF document may contain a dictionary of such 
                    destinations which may be used to reference from outside the PDF 
                    (e.g. 'http://www.mycompany.com/document.pdf#chapter3').
                </para>
                
                <para>
                    <classname>Zend_Pdf_Destination_Named</classname> objects allow to refer 
                    destinations from the document named destinations dictionary.
                </para>
                
                <para>
                    Named destination object may be created using 
                    <methodname>Zend_Pdf_Destination_Named::create(string $name)</methodname>
                    method.
                </para>
                
                <para>
                    <classname>Zend_Pdf_Destination_Named</classname> class provides the only one
                    additional method:
                </para>

                <para>
                    <methodname>string getName()</methodname>;
                </para>
            </sect4>
        </sect3>

        <sect3 id="zend.pdf.pages.interactive-features.destinations.processing">
            <title>Document level destination processing</title>
            
            <para>
                <classname>Zend_Pdf</classname> class provides a set of destinations processing 
                methods.
            </para>
            
            <para>
                Each destination object (including named destinations) can be resolved using the 
                <methodname>resolveDestination($destination)</methodname> method. It returns 
                corresponding <classname>Zend_Pdf_Page</classname> object, if destination target 
                is found, or <code>null</code> otherwise.
            </para>
            
            <para>
                <methodname>Zend_Pdf::resolveDestination()</methodname> method also takes 
                an optional boolean parameter <varname>$refreshPageCollectionHashes</varname>,
                which is true by default. It forces <classname>Zend_Pdf</classname> object 
                to refresh internal page collection hashes since document pages list may be
                updated by user using <varname>Zend_Pdf::$pages</varname> property
                (<xref linkend="zend.pdf.pages" />). It may be turned off for performance reasons,
                if it's known that document pages list wasn't changed since last method
                request.
            </para>

            <para>
                Complete list of named destinations can be retrieved using
                <methodname>Zend_Pdf::getNamedDestinations()</methodname> method. It returns 
                an array of <classname>Zend_Pdf_Target</classname> objects, which are actually
                either an explicit destination or a GoTo action 
                (<xref linkend="zend.pdf.pages.interactive-features.actions" />).
            </para>

            <para>
                <methodname>Zend_Pdf::getNamedDestination(string $name)</methodname> method returns 
                specified named destination (an explicit destination or a GoTo action).
            </para>
            
            <para>
                PDF document named destinations dictionary may be updated with
                <methodname>Zend_Pdf::setNamedDestination(string $name, $destination)</methodname> 
                method, where <varname>$destination</varname> is either an explicit destination 
                (any destination except <classname>Zend_Pdf_Destination_Named</classname>) or 
                a GoTo action. 
            </para>
            
            <para>
                If <code>null</code> is specified in place of <varname>$destination</varname>, 
                then specified named destination is removed.
            </para>
            
            <note>
                <para>
                    Unresolvable named destinations are automatically removed from a document 
                    while document saving. 
                </para>
            </note>
        </sect3>

        <example id="zend.pdf.interactive-features.destinations.example-1">
            <title>Destinations usage example</title>
            <programlisting language="php"><![CDATA[
$pdf = new Zend_Pdf();
$page1 = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);
$page2 = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);
$page3 = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);  // Page created, but not included into pages list

$pdf->pages[] = $page1;
$pdf->pages[] = $page2;

$destination1 = Zend_Pdf_Destination_Fit::create($page2);
$destination2 = Zend_Pdf_Destination_Fit::create($page3);


$page = $pdf->resolveDestination($destination1); // Returns $page2 object
$page = $pdf->resolveDestination($destination2); // Returns null, page 3 is not included into document yet

$pdf->setNamedDestination('Page2', $destination1);
$pdf->setNamedDestination('Page3', $destination2);

$destination = $pdf->getNamedDestination('Page3');                     // Returns $destination2
$pdf->resolveDestination(Zend_Pdf_Destination_Named::create('Page2')); // Returns $destination1
$pdf->resolveDestination(Zend_Pdf_Destination_Named::create('Page3')); // Returns null, page 3 is not
                                                                       // included into document yet
]]></programlisting>
        </example>
    </sect2>

    <sect2 id="zend.pdf.pages.interactive-features.actions">
        <title>Actions</title>
        <para>
            Instead of simply jumping to a destination in the document, an annotation or
            outline item can specify an action for the viewer application to perform,
            such as launching an application, playing a sound, or changing an annotation’s
            appearance state.
        </para>
        
        <sect3 id="zend.pdf.pages.interactive-features.actions.types">
            <title>Supported action types</title>
            
            <para>
                The following action types are recognized while loading PDF document:
                <itemizedlist>
                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_GoTo</classname> - go to 
                            a destination in the current document.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_GoToR</classname> - go to 
                            a destination in another document.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_GoToE</classname> - go to 
                            a destination in an embedded file.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Launch</classname> - launch 
                            an application or open or print a document.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Thread</classname> - begin reading 
                            an article thread.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_URI</classname> - resolve a URI.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Sound</classname> - play a sound.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Movie</classname> - play a movie.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Hide</classname> - hides or shows 
                            one or more annotations on the screen.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Named</classname> - execute an action 
                            predefined by the viewer application:
                            <itemizedlist>
                                <listitem>
                                    <para>
                                        <emphasis>NextPage</emphasis> - Go to the next page 
                                        of the document.
                                    </para>
                                </listitem>

                                <listitem>
                                    <para>
                                        <emphasis>PrevPage</emphasis> - Go to the previous 
                                        page of the document.
                                    </para>
                                </listitem>

                                <listitem>
                                    <para>
                                        <emphasis>FirstPage</emphasis> - Go to the first page 
                                        of the document.
                                    </para>
                                </listitem>

                                <listitem>
                                    <para>
                                        <emphasis>LastPage</emphasis> - Go to the last page 
                                        of the document.
                                    </para>
                                </listitem>
                            </itemizedlist>
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_SubmitForm</classname> - send data to 
                            a uniform resource locator.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_ResetForm</classname> - set fields 
                            to their default values.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_ImportData</classname> - import field 
                            values from a file.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_JavaScript</classname> - execute 
                            a JavaScript script.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_SetOCGState</classname> - set the state of 
                            one or more optional content groups.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Rendition</classname> - control the 
                            playing of multimedia content (begin, stop, pause, or resume 
                            a playing rendition).
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_Trans</classname> - update the display 
                            of a document, using a transition dictionary.
                        </para>
                    </listitem>

                    <listitem>
                        <para>
                            <classname>Zend_Pdf_Action_GoTo3DView</classname> - set 
                            the current view of a 3D annotation.
                        </para>
                    </listitem>
                </itemizedlist>
            </para>
            
            <para>
                Only <claassname>Zend_Pdf_Action_GoTo</claassname> actions can be created by 
                user now. It can be done using 
                <methodname>Zend_Pdf_Action_GoTo::create($destination)</methodname> method,
                where <varname>$destination</varname> is a 
                <classname>Zend_Pdf_Destination</classname> object or string which can be used 
                to identify named destination.
            </para>
            
            <para>
                It also supports the following methods:
            </para>
        </sect3>

        <sect3 id="zend.pdf.pages.interactive-features.actions.chaining">
            <title>Actions chaining</title>
            
            <para>
                Actions objects can be chained using <varname>Zend_Pdf_Action::$next</varname> 
                public property. 
            </para>
            
            <para>
                It's an array of <classname>Zend_Pdf_Action</classname> objects, which also 
                may have their sub-actions. 
            </para>
            
            <para>
                <classname>Zend_Pdf_Action</classname> class supports RecursiveIterator interface,
                so child actions may be iterated recursively:
                <programlisting language="php"><![CDATA[
$pdf = new Zend_Pdf();
$page1 = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);
$page2 = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);
$page3 = $pdf->newPage(Zend_Pdf_Page::SIZE_A4);  // Page created, but not included into pages list

$pdf->pages[] = $page1;
$pdf->pages[] = $page2;

$action1 = Zend_Pdf_Action_GoTo::create(Zend_Pdf_Destination_Fit::create($page2));
$action2 = Zend_Pdf_Action_GoTo::create(Zend_Pdf_Destination_Fit::create($page3));
$action3 = Zend_Pdf_Action_GoTo::create(Zend_Pdf_Destination_Named::create('Chapter1'));
$action4 = Zend_Pdf_Action_GoTo::create(Zend_Pdf_Destination_Named::create('Chapter5'));

$action2->next[] = $action3;
$action2->next[] = $action4;

$action1->next[] = $action2;

$actionsCount = 1; // Note! Iteration doesn't include top level action and 
                   // walks through children only
$iterator = new RecursiveIteratorIterator($action1, RecursiveIteratorIterator::SELF_FIRST);
foreach ($iterator as $chainedAction) {
    $actionsCount++;
}
printf("Actions in a tree: %d\n", $actionsCount++);
]]></programlisting>
            </para>
        </sect3>
    </sect2>

    <sect2 id="zend.pdf.pages.interactive-features.outlines">
        <title>Document Outline (bookmarks)</title>
        <para>
        </para>
    </sect2>

    <sect2 id="zend.pdf.pages.interactive-features.annotations">
        <title>Annotations</title>
        <para>
        </para>
    </sect2>
</sect1>
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