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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>PDFView - /PDFView/PDFImageView.m</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Cocoa/index.html">Cocoa</a> > <a href="../../samplecode/Cocoa/idxGraphicsImaging-date.html">Graphics & Imaging</a> > <A HREF="javascript:location.replace('index.html');">PDFView</A> >
</td>
</tr>
<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
</div>
<!-- END BREADCRUMB -->
<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">PDFView</div></h1></td>
</tr>
</table>
<!-- END TITLE GRAPHIC AND INTRO -->
<!-- START WIDE COLUMN -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td id="scdetails">
<h2>/PDFView/PDFImageView.m</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/PDFView/Controller.h</option>
<option value="listing2.html">/PDFView/Controller.m</option>
<option value="listing3.html">/PDFView/DraggableScrollView.h</option>
<option value="listing4.html">/PDFView/DraggableScrollView.m</option>
<option value="listing5.html">/PDFView/main.m</option>
<option value="listing6.html">/PDFView/PDFImageView.h</option>
<option value="listing7.html">/PDFView/PDFImageView.m</option></select>
</p>
</form>
<p><strong><a href="PDFView.zip">Download Sample</a></strong> (“PDFView.zip”, 166.1K)<BR>
<strong><a href="PDFView.dmg">Download Sample</a></strong> (“PDFView.dmg”, 221.7K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
-->
</td>
</tr>
<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">// PDFImageView.m
// Copyright (c) 2003, Apple Computer, Inc. All rights reserved.
// See legal notice below.
#import "PDFImageView.h"
#import "DraggableScrollView.h"
@implementation PDFImageView
#pragma mark PRIVATE INSTANCE METHODS
// pdfRep -- Return the image-representation used for PDFs. This
// representation can tell us things like the PDF's page count.
- (NSPDFImageRep *) pdfRep
{
// Assume our sole representation is the PDF representation.
return [[[self image] representations] lastObject];
}
#pragma mark PUBLIC INSTANCE METHODS
// loadFromPath: -- Load the PDF at the specified path into the view.
// This automatically resizes the view to fit all pages of the document.
- (void) loadFromPath: (NSString *) path
{
NSPDFImageRep *pdfRep;
NSImage *pdfImage;
NSRect frame;
// Load the file into an image-representation,
// then create an image and add the representation to it.
pdfRep = [NSPDFImageRep imageRepWithContentsOfFile: path];
pdfImage = [[[NSImage alloc] init] autorelease];
[pdfImage addRepresentation: pdfRep];
// Figure our frame by getting the bounds, which is really the size
// of one page, and multiplying the height by the page count.
frame = [pdfRep bounds];
frame.size.height *= [pdfRep pageCount];
// Install the image (remember, we're an NSImageView subclass)
[self setImage: pdfImage];
// Set our frame to match the PDF's full height (all pages)
// (don't involve our override of -setFrame:, or things won't work right)
[super setFrame: frame];
// Always scroll to show the top of the image
if ([self isFlipped])
[self scrollPoint: NSMakePoint (0, 0)];
else
[self scrollPoint: NSMakePoint (0, frame.size.height)];
}
#pragma mark PUBLIC INSTANCE METHODS -- NSView OVERRIDES
// drawRect: -- Display all pages of the PDF document.
- (void) drawRect: (NSRect) rect
{
NSPDFImageRep *rep;
int pageCount, pageNumber;
NSRect onePageBounds;
// Apparently, a PDF doesn't always draw its margins, so make them white
// by drawing our entire background as white.
[[NSColor whiteColor] set];
NSRectFill (rect);
// Get the information from the PDF image representation:
// how many pages, and how large is each one?
rep = [self pdfRep];
pageCount = [rep pageCount];
// Iterate through all pages
for (pageNumber = 0; pageNumber < pageCount; pageNumber++)
{
// Use the printing code (which uses one-based numbering) to find where
// this page appears.
onePageBounds = [self rectForPage: (1+pageNumber)];
// Draw this page only if some of its bounds overlap the drawing area
if (! NSIntersectsRect (rect, onePageBounds))
continue;
// Draw by setting the image representation to the correct page,
// then having the image representation draw.
[rep setCurrentPage: pageNumber];
[rep drawInRect: onePageBounds];
}
}
// mouseDown: -- If we have an enclosing scroll-view which knows how to drag,
// hand the event off to that scroll-view.
- (void) mouseDown:(NSEvent *) theEvent
{
NSScrollView *scrollView;
scrollView = [self enclosingScrollView];
if ([scrollView respondsToSelector: @selector(dragDocumentWithMouseDown:)])
[(DraggableScrollView*)scrollView dragDocumentWithMouseDown: theEvent];
else
[super mouseDown: theEvent];
}
// -setFrameSize: -- Override this method to make sure we keep our aspect ratio.
// This assumes -setFrameSize: is a primitive method (i.e., -setFrame: invokes it)
- (void) setFrameSize: (NSSize) newSize
{
NSSize PDFsize;
float correctHeight;
PDFsize = [[self pdfRep] bounds].size;
correctHeight = [[self pdfRep] pageCount] * (PDFsize.height/PDFsize.width) * newSize.width;
correctHeight = ceil (correctHeight); // not sure we need this
// If the height's almost right, don't fuss with it.
if (abs (correctHeight - newSize.height) > 3.0)
newSize.height = correctHeight;
[super setFrameSize: newSize];
}
#pragma mark PUBLIC INSTANCE METHODS -- NSView OVERRIDES FOR PRINTING
- (BOOL) knowsPageRange: (NSRangePointer) range
{
range->location = 1; // page numbers are one-based
range->length = [[self pdfRep] pageCount];
return YES;
}
- (NSRect) rectForPage: (int) pageNumber // INPUT: ONE-based page number
{
NSPDFImageRep *rep;
int pageCount;
NSRect result;
rep = [self pdfRep];
pageCount = [rep pageCount];
// Start at the first page
result = [rep bounds];
if (! [self isFlipped])
result = NSOffsetRect (result, 0.0, (pageCount-1)*result.size.height);
// Move to the N'th page
if ([self isFlipped])
result = NSOffsetRect (result, 0.0, (pageNumber-1) * result.size.height);
else
result = NSOffsetRect (result, 0.0, - (pageNumber-1) * result.size.height);
return result;
}
@end
/*
IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
consideration of your agreement to the following terms, and your use, installation,
modification or redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject to these
terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in
this original Apple software (the "Apple Software"), to use, reproduce, modify and
redistribute the Apple Software, with or without modifications, in source and/or binary
forms; provided that if you redistribute the Apple Software in its entirety and without
modifications, you must retain this notice and the following text and disclaimers in all
such redistributions of the Apple Software. Neither the name, trademarks, service marks
or logos of Apple Computer, Inc. may be used to endorse or promote products derived from
the Apple Software without specific prior written permission from Apple. Except as expressly
stated in this notice, no other rights or licenses, express or implied, are granted by Apple
herein, including but not limited to any patent rights that may be infringed by your
derivative works or by other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS
USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND
WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR
OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
</pre>
<!--googleoff: index -->
</td>
</tr>
</table>
<!-- END WIDE COLUMN -->
<!-- END MAIN CONTENT -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td><div style="width: 100%; height: 1px; background-color: #919699; margin-top: 5px; margin-bottom: 15px"></div></td>
</tr>
<tr>
<td align="center"><br/>
<table border="0" cellpadding="0" cellspacing="0" class="graybox">
<tr>
<th>Did this document help you?</th>
</tr>
<tr>
<td>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/PDFView/listing7.html%3Fid%3DDTS10000398-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=2&url=/samplecode/PDFView/listing7.html%3Fid%3DDTS10000398-1.0&media=dvd" target=_new>It’s good, but:</a> Report typos, inaccuracies, and so forth.</div>
<div><a href="http://developer.apple.com/feedback/?v=3&url=/samplecode/PDFView/listing7.html%3Fid%3DDTS10000398-1.0&media=dvd" target=_new>It wasn’t helpful</a>: Tell us what would have helped.</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- START BOTTOM APPLE NAVIGATION -->
<!--#include virtual="/includes/footer"-->
<!-- END BOTTOM APPLE NAVIGATION -->
<!-- START CENTER CLOSE -->
</center>
<!-- END CENTER CLOSE -->
</body>
</html>