**Inheritance:**
java.lang.Object
```
public class PageLayoutCallbackArgs
```

An argument passed into [IPageLayoutCallback.notify(com.aspose.words.PageLayoutCallbackArgs)](../../com.aspose.words/ipagelayoutcallback/\#notify-com.aspose.words.PageLayoutCallbackArgs)

To learn more, visit the [ Converting to Fixed-page Format ][Converting to Fixed-page Format] documentation article.

 **Examples:** 

Shows how to track layout changes with a layout callback.

```

 public void pageLayoutCallback() throws Exception {
     Document doc = new Document();
     doc.getBuiltInDocumentProperties().setTitle("My Document");

     DocumentBuilder builder = new DocumentBuilder(doc);
     builder.writeln("Hello world!");

     doc.getLayoutOptions().setCallback(new RenderPageLayoutCallback());
     doc.updatePageLayout();

     doc.save(getArtifactsDir() + "Layout.PageLayoutCallback.pdf");
 }

 /// 
 /// Notifies us when we save the document to a fixed page format
 /// and renders a page that we perform a page reflow on to an image in the local file system.
 /// 
 private static class RenderPageLayoutCallback implements IPageLayoutCallback {
     public void notify(PageLayoutCallbackArgs a) throws Exception {
         switch (a.getEvent()) {
             case PageLayoutEvent.PART_REFLOW_FINISHED:
                 notifyPartFinished(a);
                 break;
             case PageLayoutEvent.CONVERSION_FINISHED:
                 notifyConversionFinished(a);
                 break;
         }
     }

     private void notifyPartFinished(PageLayoutCallbackArgs a) throws Exception {
         System.out.println(MessageFormat.format("Part at page {0} reflow.", a.getPageIndex() + 1));
         renderPage(a, a.getPageIndex());
     }

     private void notifyConversionFinished(PageLayoutCallbackArgs a) {
         System.out.println(MessageFormat.format("Document \"{0}\" converted to page format.", a.getDocument().getBuiltInDocumentProperties().getTitle()));
     }

     private void renderPage(PageLayoutCallbackArgs a, int pageIndex) throws Exception {
         ImageSaveOptions saveOptions = new ImageSaveOptions(SaveFormat.PNG);
         {
             saveOptions.setPageSet(new PageSet(pageIndex));
         }

         try (FileOutputStream stream = new FileOutputStream(getArtifactsDir() + MessageFormat.format("PageLayoutCallback.page-{0} {1}.png", pageIndex + 1, ++mNum))) {
             a.getDocument().save(stream, saveOptions);
         }
     }

     private int mNum;
 }
 
```


[Converting to Fixed-page Format]: https://docs.aspose.com/words/java/converting-to-fixed-page-format/
## Methods

| Method | Description |
| --- | --- |
| [getDocument()](#getDocument) | Gets document. |
| [getEvent()](#getEvent) | Gets event. |
| [getPageIndex()](#getPageIndex) | Gets 0-based index of the page in the document this event relates to. |
### getDocument() {#getDocument}
```
public Document getDocument()
```


Gets document.

 **Examples:** 

Shows how to track layout changes with a layout callback.

```

 public void pageLayoutCallback() throws Exception {
     Document doc = new Document();
     doc.getBuiltInDocumentProperties().setTitle("My Document");

     DocumentBuilder builder = new DocumentBuilder(doc);
     builder.writeln("Hello world!");

     doc.getLayoutOptions().setCallback(new RenderPageLayoutCallback());
     doc.updatePageLayout();

     doc.save(getArtifactsDir() + "Layout.PageLayoutCallback.pdf");
 }

 /// 
 /// Notifies us when we save the document to a fixed page format
 /// and renders a page that we perform a page reflow on to an image in the local file system.
 /// 
 private static class RenderPageLayoutCallback implements IPageLayoutCallback {
     public void notify(PageLayoutCallbackArgs a) throws Exception {
         switch (a.getEvent()) {
             case PageLayoutEvent.PART_REFLOW_FINISHED:
                 notifyPartFinished(a);
                 break;
             case PageLayoutEvent.CONVERSION_FINISHED:
                 notifyConversionFinished(a);
                 break;
         }
     }

     private void notifyPartFinished(PageLayoutCallbackArgs a) throws Exception {
         System.out.println(MessageFormat.format("Part at page {0} reflow.", a.getPageIndex() + 1));
         renderPage(a, a.getPageIndex());
     }

     private void notifyConversionFinished(PageLayoutCallbackArgs a) {
         System.out.println(MessageFormat.format("Document \"{0}\" converted to page format.", a.getDocument().getBuiltInDocumentProperties().getTitle()));
     }

     private void renderPage(PageLayoutCallbackArgs a, int pageIndex) throws Exception {
         ImageSaveOptions saveOptions = new ImageSaveOptions(SaveFormat.PNG);
         {
             saveOptions.setPageSet(new PageSet(pageIndex));
         }

         try (FileOutputStream stream = new FileOutputStream(getArtifactsDir() + MessageFormat.format("PageLayoutCallback.page-{0} {1}.png", pageIndex + 1, ++mNum))) {
             a.getDocument().save(stream, saveOptions);
         }
     }

     private int mNum;
 }
 
```

**Returns:**
[Document](../../com.aspose.words/document/) - Document.
### getEvent() {#getEvent}
```
public int getEvent()
```


Gets event.

 **Examples:** 

Shows how to track layout changes with a layout callback.

```

 public void pageLayoutCallback() throws Exception {
     Document doc = new Document();
     doc.getBuiltInDocumentProperties().setTitle("My Document");

     DocumentBuilder builder = new DocumentBuilder(doc);
     builder.writeln("Hello world!");

     doc.getLayoutOptions().setCallback(new RenderPageLayoutCallback());
     doc.updatePageLayout();

     doc.save(getArtifactsDir() + "Layout.PageLayoutCallback.pdf");
 }

 /// 
 /// Notifies us when we save the document to a fixed page format
 /// and renders a page that we perform a page reflow on to an image in the local file system.
 /// 
 private static class RenderPageLayoutCallback implements IPageLayoutCallback {
     public void notify(PageLayoutCallbackArgs a) throws Exception {
         switch (a.getEvent()) {
             case PageLayoutEvent.PART_REFLOW_FINISHED:
                 notifyPartFinished(a);
                 break;
             case PageLayoutEvent.CONVERSION_FINISHED:
                 notifyConversionFinished(a);
                 break;
         }
     }

     private void notifyPartFinished(PageLayoutCallbackArgs a) throws Exception {
         System.out.println(MessageFormat.format("Part at page {0} reflow.", a.getPageIndex() + 1));
         renderPage(a, a.getPageIndex());
     }

     private void notifyConversionFinished(PageLayoutCallbackArgs a) {
         System.out.println(MessageFormat.format("Document \"{0}\" converted to page format.", a.getDocument().getBuiltInDocumentProperties().getTitle()));
     }

     private void renderPage(PageLayoutCallbackArgs a, int pageIndex) throws Exception {
         ImageSaveOptions saveOptions = new ImageSaveOptions(SaveFormat.PNG);
         {
             saveOptions.setPageSet(new PageSet(pageIndex));
         }

         try (FileOutputStream stream = new FileOutputStream(getArtifactsDir() + MessageFormat.format("PageLayoutCallback.page-{0} {1}.png", pageIndex + 1, ++mNum))) {
             a.getDocument().save(stream, saveOptions);
         }
     }

     private int mNum;
 }
 
```

**Returns:**
int - Event. The returned value is one of [PageLayoutEvent](../../com.aspose.words/pagelayoutevent/) constants.
### getPageIndex() {#getPageIndex}
```
public int getPageIndex()
```


Gets 0-based index of the page in the document this event relates to. Returns negative value if there is no associated page, or if page was removed during reflow.

 **Examples:** 

Shows how to track layout changes with a layout callback.

```

 public void pageLayoutCallback() throws Exception {
     Document doc = new Document();
     doc.getBuiltInDocumentProperties().setTitle("My Document");

     DocumentBuilder builder = new DocumentBuilder(doc);
     builder.writeln("Hello world!");

     doc.getLayoutOptions().setCallback(new RenderPageLayoutCallback());
     doc.updatePageLayout();

     doc.save(getArtifactsDir() + "Layout.PageLayoutCallback.pdf");
 }

 /// 
 /// Notifies us when we save the document to a fixed page format
 /// and renders a page that we perform a page reflow on to an image in the local file system.
 /// 
 private static class RenderPageLayoutCallback implements IPageLayoutCallback {
     public void notify(PageLayoutCallbackArgs a) throws Exception {
         switch (a.getEvent()) {
             case PageLayoutEvent.PART_REFLOW_FINISHED:
                 notifyPartFinished(a);
                 break;
             case PageLayoutEvent.CONVERSION_FINISHED:
                 notifyConversionFinished(a);
                 break;
         }
     }

     private void notifyPartFinished(PageLayoutCallbackArgs a) throws Exception {
         System.out.println(MessageFormat.format("Part at page {0} reflow.", a.getPageIndex() + 1));
         renderPage(a, a.getPageIndex());
     }

     private void notifyConversionFinished(PageLayoutCallbackArgs a) {
         System.out.println(MessageFormat.format("Document \"{0}\" converted to page format.", a.getDocument().getBuiltInDocumentProperties().getTitle()));
     }

     private void renderPage(PageLayoutCallbackArgs a, int pageIndex) throws Exception {
         ImageSaveOptions saveOptions = new ImageSaveOptions(SaveFormat.PNG);
         {
             saveOptions.setPageSet(new PageSet(pageIndex));
         }

         try (FileOutputStream stream = new FileOutputStream(getArtifactsDir() + MessageFormat.format("PageLayoutCallback.page-{0} {1}.png", pageIndex + 1, ++mNum))) {
             a.getDocument().save(stream, saveOptions);
         }
     }

     private int mNum;
 }
 
```

**Returns:**
int - 0-based index of the page in the document this event relates to.