<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!--*** This is a generated file. Do not edit. ***-->
<link rel="stylesheet" href="../skin/tigris.css" type="text/css">
<link rel="stylesheet" href="../skin/mysite.css" type="text/css">
<link rel="stylesheet" href="../skin/site.css" type="text/css">
<link media="print" rel="stylesheet" href="../skin/print.css" type="text/css">
<title>Busy Developers' Guide to HSLF drawing layer</title>
</head>
<body bgcolor="white" class="composite">
<!--================= start Banner ==================-->
<div id="banner">
<table width="100%" cellpadding="8" cellspacing="0" summary="banner" border="0">
<tbody>
<tr>
<!--================= start Group Logo ==================-->
<td width="50%" align="left">
<div class="groupLogo">
<a href="http://poi.apache.org"><img border="0" class="logoImage" alt="Apache POI" src="../resources/images/group-logo.jpg"></a>
</div>
</td>
<!--================= end Group Logo ==================-->
<!--================= start Project Logo ==================--><td width="50%" align="right">
<div align="right" class="projectLogo">
<a href="http://poi.apache.org/"><img border="0" class="logoImage" alt="POI" src="../resources/images/project-logo.jpg"></a>
</div>
</td>
<!--================= end Project Logo ==================-->
</tr>
</tbody>
</table>
</div>
<!--================= end Banner ==================-->
<!--================= start Main ==================-->
<table width="100%" cellpadding="0" cellspacing="0" border="0" summary="nav" id="breadcrumbs">
<tbody>
<!--================= start Status ==================-->
<tr class="status">
<td>
<!--================= start BreadCrumb ==================--><a href="http://www.apache.org/">Apache</a> | <a href="http://poi.apache.org/">POI</a><a href=""></a>
<!--================= end BreadCrumb ==================--></td><td id="tabs">
<!--================= start Tabs ==================-->
<div class="tab">
<span class="selectedTab"><a class="base-selected" href="../index.html">Home</a></span> | <script language="Javascript" type="text/javascript">
function printit() {
if (window.print) {
window.print() ;
} else {
var WebBrowser = '<OBJECT ID="WebBrowser1" WIDTH="0" HEIGHT="0" CLASSID="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></OBJECT>';
document.body.insertAdjacentHTML('beforeEnd', WebBrowser);
WebBrowser1.ExecWB(6, 2);//Use a 1 vs. a 2 for a prompting dialog box WebBrowser1.outerHTML = "";
}
}
</script><script language="Javascript" type="text/javascript">
var NS = (navigator.appName == "Netscape");
var VERSION = parseInt(navigator.appVersion);
if (VERSION > 3) {
document.write(' <a title="PRINT this page OUT" href="javascript:printit()">PRINT</a>');
}
</script> | <a title="PDF file of this page" href="how-to-shapes.pdf">PDF</a>
</div>
<!--================= end Tabs ==================-->
</td>
</tr>
</tbody>
</table>
<!--================= end Status ==================-->
<table id="main" width="100%" cellpadding="8" cellspacing="0" summary="" border="0">
<tbody>
<tr valign="top">
<!--================= start Menu ==================-->
<td id="leftcol">
<div id="navcolumn">
<div class="menuBar">
<div class="menu">
<span class="menuLabel">Apache POI</span>
<div class="menuItem">
<a href="../index.html">Top</a>
</div>
</div>
<div class="menu">
<span class="menuLabel">HSLF</span>
<div class="menuItem">
<a href="index.html">Overview</a>
</div>
<div class="menuItem">
<a href="quick-guide.html">Quick Guide</a>
</div>
<div class="menuItem">
<span class="menuSelected">Shapes HowTo</span>
</div>
<div class="menuItem">
<a href="ppt-file-format.html">PPT File Format</a>
</div>
</div>
</div>
</div>
<form target="_blank" action="http://www.google.com/search" method="get">
<table summary="search" border="0" cellspacing="0" cellpadding="0">
<tr>
<td><img height="1" width="1" alt="" src="../skin/images/spacer.gif" class="spacer"></td><td nowrap="nowrap">
Search Apache POI<br>
<input value="poi.apache.org" name="sitesearch" type="hidden"><input size="10" name="q" id="query" type="text"><img height="1" width="5" alt="" src="../skin/images/spacer.gif" class="spacer"><input name="Search" value="GO" type="submit"></td><td><img height="1" width="1" alt="" src="../skin/images/spacer.gif" class="spacer"></td>
</tr>
<tr>
<td colspan="3"><img height="7" width="1" alt="" src="../skin/images/spacer.gif" class="spacer"></td>
</tr>
<tr>
<td class="bottom-left-thick"></td><td bgcolor="#a5b6c6"><img height="1" width="1" alt="" src="../skin/images/spacer.gif" class="spacer"></td><td class="bottom-right-thick"></td>
</tr>
</table>
</form>
</td>
<!--================= end Menu ==================-->
<!--================= start Content ==================--><td>
<div id="bodycol">
<div class="app">
<div align="center">
<h1>Busy Developers' Guide to HSLF drawing layer</h1>
</div>
<div class="h3">
<a name="Busy+Developers%27+Guide+to+HSLF+drawing+layer"></a>
<div class="h3">
<h3>Busy Developers' Guide to HSLF drawing layer</h3>
</div>
<a name="Index+of+Features"></a>
<div class="h4">
<h4>Index of Features</h4>
</div>
<ul>
<li>
<a href="#NewPresentation">How to create a new presentation and add new slides to it</a>
</li>
<li>
<a href="#PageSize">How to retrieve or change slide size</a>
</li>
<li>
<a href="#GetShapes">How to get shapes contained in a particular slide</a>
</li>
<li>
<a href="#Shapes">Drawing a shape on a slide</a>
</li>
<li>
<a href="#Pictures">How to work with pictures</a>
</li>
<li>
<a href="#SlideTitle">How to set slide title</a>
</li>
<li>
<a href="#Fill">How to work with slide/shape background</a>
</li>
<li>
<a href="#Bullets">How to create bulleted lists</a>
</li>
<li>
<a href="#Hyperlinks">Hyperlinks</a>
</li>
<li>
<a href="#Tables">Tables</a>
</li>
<li>
<a href="#RemoveShape">How to remove shapes</a>
</li>
<li>
<a href="#OLE">How to retrieve embedded OLE objects</a>
</li>
<li>
<a href="#Sound">How to retrieve embedded sounds</a>
</li>
<li>
<a href="#Freeform">How to create shapes of arbitrary geometry</a>
</li>
<li>
<a href="#Graphics2D">Shapes and Graphics2D</a>
</li>
<li>
<a href="#Render">How to convert slides into images</a>
</li>
<li>
<a href="#HeadersFooters">Headers / Footers</a>
</li>
</ul>
<a name="Features"></a>
<div class="h4">
<h4>Features</h4>
</div>
<a name="NewPresentation"></a>
<a name="New+Presentation"></a>
<div class="h2">
<h2>New Presentation</h2>
</div>
<pre class="code">
//create a new empty slide show
SlideShow ppt = new SlideShow();
//add first slide
Slide s1 = ppt.createSlide();
//add second slide
Slide s2 = ppt.createSlide();
//save changes in a file
FileOutputStream out = new FileOutputStream("slideshow.ppt");
ppt.write(out);
out.close();
</pre>
<a name="PageSize"></a>
<a name="How+to+retrieve+or+change+slide+size"></a>
<div class="h2">
<h2>How to retrieve or change slide size</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow(new HSLFSlideShow("slideshow.ppt"));
//retrieve page size. Coordinates are expressed in points (72 dpi)
java.awt.Dimension pgsize = ppt.getPageSize();
int pgx = pgsize.width; //slide width
int pgy = pgsize.height; //slide height
//set new page size
ppt.setPageSize(new java.awt.Dimension(1024, 768));
//save changes
FileOutputStream out = new FileOutputStream("slideshow.ppt");
ppt.write(out);
out.close();
</pre>
<a name="GetShapes"></a>
<a name="How+to+get+shapes+contained+in+a+particular+slide"></a>
<div class="h2">
<h2>How to get shapes contained in a particular slide</h2>
</div>
<p>
The following code demonstrates how to iterate over shapes for each slide.
</p>
<pre class="code">
SlideShow ppt = new SlideShow(new HSLFSlideShow("slideshow.ppt"));
//get slides
Slide[] slide = ppt.getSlides();
for (int i = 0; i < slide.length; i++){
Shape[] sh = slide[i].getShapes();
for (int j = 0; j < sh.length; j++){
//name of the shape
String name = sh[j].getShapeName();
//shapes's anchor which defines the position of this shape in the slide
java.awt.Rectangle anchor = sh[j].getAnchor();
if (sh[j] instanceof Line){
Line line = (Line)sh[j];
//work with Line
} else if (sh[j] instanceof AutoShape){
AutoShape shape = (AutoShape)sh[j];
//work with AutoShape
} else if (sh[j] instanceof TextBox){
TextBox shape = (TextBox)sh[j];
//work with TextBox
} else if (sh[j] instanceof Picture){
Picture shape = (Picture)sh[j];
//work with Picture
}
}
}
</pre>
<a name="Shapes"></a>
<a name="Drawing+a+shape+on+a+slide"></a>
<div class="h2">
<h2>Drawing a shape on a slide</h2>
</div>
<div class="frame warning">
<div class="label">Warning</div>
<div class="content">
To work with graphic objects HSLF uses Java2D classes
that may throw exceptions if graphical environment is not available. In case if graphical environment
is not available, you must tell Java that you are running in headless mode and
set the following system property: <span class="codefrag"> java.awt.headless=true </span>
(either via <span class="codefrag">-Djava.awt.headless=true</span> startup parameter or via <span class="codefrag">System.setProperty("java.awt.headless", "true")</span>).
</div>
</div>
<p>
When you add a shape, you usually specify the dimensions of the shape and the position
of the upper left corner of the bounding box for the shape relative to the upper left
corner of the slide. Distances in the drawing layer are measured in points (72 points = 1 inch).
</p>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
//Line shape
Line line = new Line();
line.setAnchor(new java.awt.Rectangle(50, 50, 100, 20));
line.setLineColor(new Color(0, 128, 0));
line.setLineStyle(Line.LINE_DOUBLE);
slide.addShape(line);
//TextBox
TextBox txt = new TextBox();
txt.setText("Hello, World!");
txt.setAnchor(new java.awt.Rectangle(300, 100, 300, 50));
//use RichTextRun to work with the text format
RichTextRun rt = txt.getTextRun().getRichTextRuns()[0];
rt.setFontSize(32);
rt.setFontName("Arial");
rt.setBold(true);
rt.setItalic(true);
rt.setUnderlined(true);
rt.setFontColor(Color.red);
rt.setAlignment(TextBox.AlignRight);
slide.addShape(txt);
//Autoshape
//32-point star
AutoShape sh1 = new AutoShape(ShapeTypes.Star32);
sh1.setAnchor(new java.awt.Rectangle(50, 50, 100, 200));
sh1.setFillColor(Color.red);
slide.addShape(sh1);
//Trapezoid
AutoShape sh2 = new AutoShape(ShapeTypes.Trapezoid);
sh2.setAnchor(new java.awt.Rectangle(150, 150, 100, 200));
sh2.setFillColor(Color.blue);
slide.addShape(sh2);
FileOutputStream out = new FileOutputStream("slideshow.ppt");
ppt.write(out);
out.close();
</pre>
<a name="Pictures"></a>
<a name="How+to+work+with+pictures"></a>
<div class="h2">
<h2>How to work with pictures</h2>
</div>
<p>
Currently, HSLF API supports the following types of pictures:
</p>
<ul>
<li>Windows Metafiles (WMF)</li>
<li>Enhanced Metafiles (EMF)</li>
<li>JPEG Interchange Format</li>
<li>Portable Network Graphics (PNG)</li>
<li>Macintosh PICT</li>
</ul>
<pre class="code">
SlideShow ppt = new SlideShow(new HSLFSlideShow("slideshow.ppt"));
//extract all pictures contained in the presentation
PictureData[] pdata = ppt.getPictureData();
for (int i = 0; i < pdata.length; i++){
PictureData pict = pdata[i];
// picture data
byte[] data = pict.getData();
int type = pict.getType();
String ext;
switch (type){
case Picture.JPEG: ext=".jpg"; break;
case Picture.PNG: ext=".png"; break;
case Picture.WMF: ext=".wmf"; break;
case Picture.EMF: ext=".emf"; break;
case Picture.PICT: ext=".pict"; break;
default: continue;
}
FileOutputStream out = new FileOutputStream("pict_"+i + ext);
out.write(data);
out.close();
}
// add a new picture to this slideshow and insert it in a new slide
int idx = ppt.addPicture(new File("clock.jpg"), Picture.JPEG);
Picture pict = new Picture(idx);
//set image position in the slide
pict.setAnchor(new java.awt.Rectangle(100, 100, 300, 200));
Slide slide = ppt.createSlide();
slide.addShape(pict);
//now retrieve pictures containes in the first slide and save them on disk
slide = ppt.getSlides()[0];
Shape[] sh = slide.getShapes();
for (int i = 0; i < sh.length; i++){
if (sh[i] instanceof Picture){
Picture pict = (Picture)sh[i];
PictureData pictData = pict.getPictureData();
byte[] data = pictData.getData();
int type = pictData.getType();
if (type == Picture.JPEG){
FileOutputStream out = new FileOutputStream("slide0_"+i+".jpg");
out.write(data);
out.close();
} else if (type == Picture.PNG){
FileOutputStream out = new FileOutputStream("slide0_"+i+".png");
out.write(data);
out.close();
}
}
}
FileOutputStream out = new FileOutputStream("slideshow.ppt");
ppt.write(out);
out.close();
</pre>
<a name="SlideTitle"></a>
<a name="How+to+set+slide+title"></a>
<div class="h2">
<h2>How to set slide title</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
TextBox title = slide.addTitle();
title.setText("Hello, World!");
//save changes
FileOutputStream out = new FileOutputStream("slideshow.ppt");
ppt.write(out);
out.close();
</pre>
<p>
Below is the equivalent code in PowerPoint VBA:
</p>
<pre class="code">
Set myDocument = ActivePresentation.Slides(1)
myDocument.Shapes.AddTitle.TextFrame.TextRange.Text = "Hello, World!"
</pre>
<a name="Fill"></a>
<a name="How+to+modify+background+of+a+slide+master"></a>
<div class="h2">
<h2>How to modify background of a slide master</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
SlideMaster master = ppt.getSlidesMasters()[0];
Fill fill = master.getBackground().getFill();
int idx = ppt.addPicture(new File("background.png"), Picture.PNG);
fill.setFillType(Fill.FILL_PICTURE);
fill.setPictureData(idx);
</pre>
<a name="How+to+modify+background+of+a+slide"></a>
<div class="h2">
<h2>How to modify background of a slide</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
//This slide has its own background.
//Without this line it will use master's background.
slide.setFollowMasterBackground(false);
Fill fill = slide.getBackground().getFill();
int idx = ppt.addPicture(new File("background.png"), Picture.PNG);
fill.setFillType(Fill.FILL_PATTERN);
fill.setPictureData(idx);
</pre>
<a name="How+to+modify+background+of+a+shape"></a>
<div class="h2">
<h2>How to modify background of a shape</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
Shape shape = new AutoShape(ShapeTypes.Rectangle);
shape.setAnchor(new java.awt.Rectangle(100, 100, 200, 200));
Fill fill = shape.getFill();
fill.setFillType(Fill.FILL_SHADE);
fill.setBackgroundColor(Color.red);
fill.setForegroundColor(Color.green);
slide.addShape(shape);
</pre>
<a name="Bullets"></a>
<a name="How+to+create+bulleted+lists"></a>
<div class="h2">
<h2>How to create bulleted lists</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
TextBox shape = new TextBox();
RichTextRun rt = shape.getTextRun().getRichTextRuns()[0];
shape.setText(
"January\r" +
"February\r" +
"March\r" +
"April");
rt.setFontSize(42);
rt.setBullet(true);
rt.setBulletOffset(0); //bullet offset
rt.setTextOffset(50); //text offset (should be greater than bullet offset)
rt.setBulletChar('\u263A'); //bullet character
slide.addShape(shape);
shape.setAnchor(new java.awt.Rectangle(50, 50, 500, 300)); //position of the text box in the slide
slide.addShape(shape);
FileOutputStream out = new FileOutputStream("bullets.ppt");
ppt.write(out);
out.close();
</pre>
<a name="Hyperlinks"></a>
<a name="How+to+read+hyperlinks+from+a+slide+show"></a>
<div class="h2">
<h2>How to read hyperlinks from a slide show</h2>
</div>
<pre class="code">
FileInputStream is = new FileInputStream("slideshow.ppt");
SlideShow ppt = new SlideShow(is);
is.close();
Slide[] slide = ppt.getSlides();
for (int j = 0; j < slide.length; j++) {
//read hyperlinks from the text runs
TextRun[] txt = slide[j].getTextRuns();
for (int k = 0; k < txt.length; k++) {
String text = txt[k].getText();
Hyperlink[] links = txt[k].getHyperlinks();
if(links != null) for (int l = 0; l < links.length; l++) {
Hyperlink link = links[l];
String title = link.getTitle();
String address = link.getAddress();
String substring = text.substring(link.getStartIndex(), link.getEndIndex()-1); //in ppt end index is inclusive
}
}
//in PowerPoint you can assign a hyperlink to a shape without text,
//for example to a Line object. The code below demonstrates how to
//read such hyperlinks
Shape[] sh = slide[j].getShapes();
for (int k = 0; k < sh.length; k++) {
Hyperlink link = sh[k].getHyperlink();
if(link != null) {
String title = link.getTitle();
String address = link.getAddress();
}
}
}
</pre>
<a name="Tables"></a>
<a name="How+to+create+tables"></a>
<div class="h2">
<h2>How to create tables</h2>
</div>
<pre class="code">
//table data
String[][] data = {
{"INPUT FILE", "NUMBER OF RECORDS"},
{"Item File", "11,559"},
{"Vendor File", "300"},
{"Purchase History File", "10,000"},
{"Total # of requisitions", "10,200,038"}
};
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
//create a table of 5 rows and 2 columns
Table table = new Table(5, 2);
for (int i = 0; i < data.length; i++) {
for (int j = 0; j < data[i].length; j++) {
TableCell cell = table.getCell(i, j);
cell.setText(data[i][j]);
RichTextRun rt = cell.getTextRun().getRichTextRuns()[0];
rt.setFontName("Arial");
rt.setFontSize(10);
cell.setVerticalAlignment(TextBox.AnchorMiddle);
cell.setHorizontalAlignment(TextBox.AlignCenter);
}
}
//set table borders
Line border = table.createBorder();
border.setLineColor(Color.black);
border.setLineWidth(1.0);
table.setAllBorders(border);
//set width of the 1st column
table.setColumnWidth(0, 300);
//set width of the 2nd column
table.setColumnWidth(1, 150);
slide.addShape(table);
table.moveTo(100, 100);
FileOutputStream out = new FileOutputStream("hslf-table.ppt");
ppt.write(out);
out.close();
</pre>
<a name="RemoveShape"></a>
<a name="How+to+remove+shapes+from+a+slide"></a>
<div class="h2">
<h2>How to remove shapes from a slide</h2>
</div>
<pre class="code">
Shape[] shape = slide.getShapes();
for (int i = 0; i < shape.length; i++) {
//remove the shape
boolean ok = slide.removeShape(shape[i]);
if(ok){
//the shape was removed. Do something.
}
}
</pre>
<a name="OLE"></a>
<a name="How+to+retrieve+embedded+OLE+objects"></a>
<div class="h2">
<h2>How to retrieve embedded OLE objects</h2>
</div>
<pre class="code">
Shape[] shape = slide.getShapes();
for (int i = 0; i < shape.length; i++) {
if (shape[i] instanceof OLEShape) {
OLEShape ole = (OLEShape) shape[i];
ObjectData data = ole.getObjectData();
String name = ole.getInstanceName();
if ("Worksheet".equals(name)) {
HSSFWorkbook wb = new HSSFWorkbook(data.getData());
} else if ("Document".equals(name)) {
HWPFDocument doc = new HWPFDocument(data.getData());
}
}
}
</pre>
<a name="Sound"></a>
<a name="How+to+retrieve+embedded+sounds"></a>
<div class="h2">
<h2>How to retrieve embedded sounds</h2>
</div>
<pre class="code">
FileInputStream is = new FileInputStream(args[0]);
SlideShow ppt = new SlideShow(is);
is.close();
SoundData[] sound = ppt.getSoundData();
for (int i = 0; i < sound.length; i++) {
//save *WAV sounds on disk
if(sound[i].getSoundType().equals(".WAV")){
FileOutputStream out = new FileOutputStream(sound[i].getSoundName());
out.write(sound[i].getData());
out.close();
}
}
</pre>
<a name="Freeform"></a>
<a name="How+to+create+shapes+of+arbitrary+geometry"></a>
<div class="h2">
<h2>How to create shapes of arbitrary geometry</h2>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
java.awt.geom.GeneralPath path = new java.awt.geom.GeneralPath();
path.moveTo(100, 100);
path.lineTo(200, 100);
path.curveTo(50, 45, 134, 22, 78, 133);
path.curveTo(10, 45, 134, 56, 78, 100);
path.lineTo(100, 200);
path.closePath();
Freeform shape = new Freeform();
shape.setPath(path);
slide.addShape(shape);
</pre>
<a name="Graphics2D"></a>
<a name="How+to+draw+into+a+slide+using+Graphics2D"></a>
<div class="h2">
<h2>How to draw into a slide using Graphics2D</h2>
</div>
<div class="frame warning">
<div class="label">Warning</div>
<div class="content">
Current implementation of the PowerPoint Graphics2D driver is not fully compliant with the java.awt.Graphics2D specification.
Some features like clipping, drawing of images are not yet supported.
</div>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
Slide slide = ppt.createSlide();
//draw a simple bar graph
//bar chart data. The first value is the bar color, the second is the width
Object[] def = new Object[]{
Color.yellow, new Integer(100),
Color.green, new Integer(150),
Color.gray, new Integer(75),
Color.red, new Integer(200),
};
//all objects are drawn into a shape group so we need to create one
ShapeGroup group = new ShapeGroup();
//define position of the drawing in the slide
Rectangle bounds = new java.awt.Rectangle(200, 100, 350, 300);
//if you want to draw in the entire slide area then define the anchor as follows:
//Dimension pgsize = ppt.getPageSize();
//java.awt.Rectangle bounds = new java.awt.Rectangle(0, 0, pgsize.width, pgsize.height);
group.setAnchor(bounds);
slide.addShape(group);
//draw a simple bar chart
Graphics2D graphics = new PPGraphics2D(group);
int x = bounds.x + 50, y = bounds.y + 50;
graphics.setFont(new Font("Arial", Font.BOLD, 10));
for (int i = 0, idx = 1; i < def.length; i+=2, idx++) {
graphics.setColor(Color.black);
int width = ((Integer)def[i+1]).intValue();
graphics.drawString("Q" + idx, x-20, y+20);
graphics.drawString(width + "%", x + width + 10, y + 20);
graphics.setColor((Color)def[i]);
graphics.fill(new Rectangle(x, y, width, 30));
y += 40;
}
graphics.setColor(Color.black);
graphics.setFont(new Font("Arial", Font.BOLD, 14));
graphics.draw(bounds);
graphics.drawString("Performance", x + 70, y + 40);
FileOutputStream out = new FileOutputStream("hslf-graphics2d.ppt");
ppt.write(out);
out.close();
</pre>
<a name="Render"></a>
<a name="Export+PowerPoint+slides+into+java.awt.Graphics2D"></a>
<div class="h2">
<h2>Export PowerPoint slides into java.awt.Graphics2D</h2>
</div>
<p>
HSLF provides a way to export slides into images. You can capture slides into java.awt.Graphics2D object (or any other)
and serialize it into a PNG or JPEG format. Please note, although HSLF attempts to render slides as close to PowerPoint as possible,
the output may look differently from PowerPoint due to the following reasons:
</p>
<ul>
<li>Java2D renders fonts differently vs PowerPoint. There are always some differences in the way the font glyphs are painted</li>
<li>HSLF uses java.awt.font.LineBreakMeasurer to break text into lines. PowerPoint may do it in a different way.</li>
<li>If a font from the presentation is not avaiable, then the JDK default font will be used.</li>
</ul>
<p>
Current Limitations:
</p>
<ul>
<li>Some types of shapes are not yet supported (WordArt, complex auto-shapes)</li>
<li>Only Bitmap images (PNG, JPEG, DIB) can be rendered in Java</li>
</ul>
<pre class="code">
FileInputStream is = new FileInputStream("slideshow.ppt");
SlideShow ppt = new SlideShow(is);
is.close();
Dimension pgsize = ppt.getPageSize();
Slide[] slide = ppt.getSlides();
for (int i = 0; i < slide.length; i++) {
BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = img.createGraphics();
//clear the drawing area
graphics.setPaint(Color.white);
graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
//render
slide[i].draw(graphics);
//save the output
FileOutputStream out = new FileOutputStream("slide-" + (i+1) + ".png");
javax.imageio.ImageIO.write(img, "png", out);
out.close();
}
</pre>
<a name="HeadersFooters"></a>
<a name="How+to+extract+Headers+%2F+Footers+from+an+existing+presentation"></a>
<div class="h4">
<h4>How to extract Headers / Footers from an existing presentation</h4>
</div>
<pre class="code">
FileInputStream is = new FileInputStream("slideshow.ppt");
SlideShow ppt = new SlideShow(is);
is.close();
Slide[] slides = ppt.getSlides();
//presentation-scope headers / footers
HeadersFooters hdd = ppt.getSlideHeadersFooters();
if(hdd.isFooterVisible()) {
String footerText = hdd.getFooterText();
}
//per-slide headers / footers
for (int i=0; i < slides.length; i++){
HeadersFooters hdd2 = slides[i].getHeadersFooters();
if(hdd2.isFooterVisible()) {
String footerText = hdd2.getFooterText();
}
if(hdd2.isUserDateVisible()) {
String customDate = hdd2.getDateTimeText();
}
if(hdd2.isSlideNumberVisible()){
int slideNUm = slides[i].getSlideNumber();
}
}
</pre>
<a name="How+to+set+Headers+%2F+Footers"></a>
<div class="h4">
<h4>How to set Headers / Footers</h4>
</div>
<pre class="code">
SlideShow ppt = new SlideShow();
//presentation-scope headers / footers
HeadersFooters hdd = ppt.getSlideHeadersFooters();
hdd.setSlideNumberVisible(true);
hdd.setFootersText("Created by POI-HSLF");
</pre>
<div id="authors" align="right">by Yegor Kozlov</div>
</div>
</div>
</div>
</td>
<!--================= end Content ==================-->
</tr>
</tbody>
</table>
<!--================= end Main ==================-->
<!--================= start Footer ==================-->
<div id="footer">
<table summary="footer" cellspacing="0" cellpadding="4" width="100%" border="0">
<tbody>
<tr>
<!--================= start Copyright ==================-->
<td colspan="2">
<div align="center">
<div class="copyright">
Copyright © 2002-2011 The Apache Software Foundation. All rights reserved.<br>
Apache POI, POI, Apache, the Apache feather logo, and the Apache
POI project logo are trademarks of The Apache Software Foundation.
</div>
</div>
</td>
<!--================= end Copyright ==================-->
</tr>
<tr>
<td align="left">
<!--================= start Host ==================-->
<!--================= end Host ==================--></td><td align="right">
<!--================= start Credits ==================-->
<div align="right">
<div class="credit"></div>
</div>
<!--================= end Credits ==================-->
</td>
</tr>
</tbody>
</table>
</div>
<!--================= end Footer ==================-->
</body>
</html>
