Draw Text in PDF context (with a given angle)

[Omid]

Hi all,

I trying now some days to position an given text into a pdf contect by a given position and angle. But my positioning seems not to be correct.

Here is the way I do it:

- (IBAction)createPDF:(id)sender {
   ...
   CGPoint curTxtPos = [self.view.window convertPoint:lblMessage.frame.origin toWindow:nil];
   ...

   [PDFController CreatePDFFileWithPageSize: CGRectMake(0, 0, 480, 320) 
					Image: imgSelectedImage.image.CGImage
					ImagePosition: curImgPos
				        Border: (imgBorderImage.hidden)?nil:imgBorderImage.image.CGImage
					TextToDisplay: [lblMessage.text cStringUsingEncoding:NSMacOSRomanStringEncoding] 
					TextPosition: CGRectMake(curTxtPos.x, curTxtPos.y, lblMessage.frame.size.width, lblMessage.frame.size.height)
					TextAngle: txtAngle	
					TextFont: [lblMessage font]
					Icons: iconsDict
					Path: filenamepdf];

the CreatePDFFileWithPageSize looks like this:

+(void) CreatePDFFileWithPageSize: (CGRect) pageRect 
					Image: (CGImageRef) image 
					ImagePosition: (CGRect) imgPos
					Border: (CGImageRef) border
					TextToDisplay: (const char *) text 
					TextPosition:(CGRect) txtPos 
					TextAngle:(CGFloat) currentAngle 
					TextFont:(UIFont *) txtFont
					Icons:(NSMutableDictionary *) iconsDict
					Path: (const char *)filename;
{
	// This code block sets up our PDF Context so that we can draw to it
	CGContextRef pdfContext;
	CFStringRef path;
	CFURLRef url;
	CFMutableDictionaryRef myDictionary = NULL;
	// Create a CFString from the filename we provide to this method when we call it
	path = CFStringCreateWithCString (NULL, filename,
									  kCFStringEncodingUTF8);
	// Create a CFURL using the CFString we just defined
	url = CFURLCreateWithFileSystemPath (NULL, path,
										 kCFURLPOSIXPathStyle, 0);
	CFRelease (path);
	// This dictionary contains extra options mostly for 'signing' the PDF
	myDictionary = CFDictionaryCreateMutable(NULL, 0,
											 &kCFTypeDictionaryKeyCallBacks,
											 &kCFTypeDictionaryValueCallBacks);
	CFDictionarySetValue(myDictionary, kCGPDFContextTitle, CFSTR("..."));
	CFDictionarySetValue(myDictionary, kCGPDFContextCreator, CFSTR("..."));
	CFDictionarySetValue(myDictionary, kCGPDFContextKeywords, CFSTR("..."));
	// Create our PDF Context with the CFURL, the CGRect we provide, and the above defined dictionary
	pdfContext = CGPDFContextCreateWithURL (url, &pageRect, myDictionary);
	// Cleanup our mess
	CFRelease(myDictionary);
	CFRelease(url);
	// Done creating our PDF Context, now it's time to draw to it
	
	// Starts our first page
	CGContextBeginPage (pdfContext, &pageRect);
	
	//!!!: draw image
	float newY = pageRect.size.height - (imgPos.origin.y + imgPos.size.height);
	
	CGContextDrawImage (pdfContext, CGRectMake(imgPos.origin.x, newY, imgPos.size.width, imgPos.size.height),image);

   ...

   //!!!: draw rendered Text
	newY = pageRect.size.height - (txtPos.origin.y /*+ txtPos.size.height*0.75*/);
	UIGraphicsPushContext(pdfContext);
	
	CGContextTranslateCTM(pdfContext,txtPos.origin.x, newY);
	CGContextScaleCTM(pdfContext, 1.0, -1.0);
	
	CGAffineTransform textTransform = CGAffineTransformMakeRotation(/*M_PI*2 - */currentAngle);
	CGContextConcatCTM(pdfContext, textTransform);
	
	
	NSString *string =[NSString stringWithCString:text];
	//[string drawInRect:CGRectMake(0, 0, txtPos.size.width, txtPos.size.height) withFont:[UIFont fontWithName:@"Helvetica" size:48]];
	[string drawInRect:CGRectMake(0, 0, txtPos.size.width, txtPos.size.height) withFont:txtFont];
	
	UIGraphicsPopContext();
	
	// We are done drawing to this page, let's end it
	// We could add as many pages as we wanted using CGContextBeginPage/CGContextEndPage
	CGContextEndPage (pdfContext);
	
	// We are done with our context now, so we release it
	CGContextRelease (pdfContext);	
}

I really don't know where my failure is.

Thanks for your help,

Omid