macOS Can Somebody Refer Me to Simple Source-Code for Printing?

[kaydell.leavitt]

Hi, I need to have a simple example of source-code that implements printing on Mac OS X.

Can somebody give me a link to such sample code?

Thank you.

 

[kainjow]

If you have an NSView that you want to print, use

[view print:nil];

 

[kaydell.leavitt]

Thanks, this displays a print job dialog and prints a blank page, but my drawRect method doesn't get called.

Here is my code:

//
//  PrintTestAppDelegate.m
//  PrintTest
//
//  Created by kaydell on 4/27/10.
//  Copyright 2010 LevSolve.com. All rights reserved.
//

#import "PrintTestAppDelegate.h"

@implementation PrintTestAppDelegate

@synthesize window;
@synthesize printTestView;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
	printTestView = [[PrintTestView alloc] init];
}

- (IBAction) print: (id) sender {
	NSLog(@"print:");
	[printTestView print:nil]; // <<<<<<< this gets called <<<<<<
}

@end

//
//  PrintTestView.m
//  PrintTest
//
//  Created by kaydell on 4/27/10.
//  Copyright 2010 LevSolve.com. All rights reserved.
//

#import "PrintTestView.h"


@implementation PrintTestView

- (void)drawString:(NSString *)string centeredInRect:(NSRect)r withAttributes:(NSDictionary *)theAttribute
{
	NSPoint stringOrigin;
	NSSize stringSize;
	stringSize = [string sizeWithAttributes:theAttribute];
	stringOrigin.x = r.origin.x + (r.size.width - stringSize.width)/2;
	stringOrigin.y = r.origin.y  + (r.size.height - stringSize.height)/2;
	[string drawAtPoint:stringOrigin withAttributes:theAttribute];
}

- (void) drawRect: (NSRect) dirtyRect { // <<<<<<< this doesn't get called
	NSRect bounds = [self bounds];
	[self drawString:@"Print test" centeredInRect:bounds withAttributes:nil];	
}

@end

-- Kaydell

 

[kainjow]

printTestView = [[PrintTestView alloc] init];

You never give your view a frame, so it's size is 0x0, which results in nothing printed. Try giving it a size, like so:

NSRect frame = NSMakeRect(0.0, 0.0, 100.0, 100.0);
printTestView = [[PrintTestView alloc] initWithFrame:frame];

 

[kaydell.leavitt]

Thanks!!!

Thank you for your help!

 

[kaydell.leavitt]

This Works, but...

The following code works, I mean that it prints the image, but I need to get the image from the current directory and I don't know how. (I tried just using the file name for the path name, but that didn't work for some reason.)

#import "PrintTestView.h"


@implementation PrintTestView

- (void) print:(id)sender {
	NSString *path = [@"~/Logo.png" stringByStandardizingPath];
	NSString *string = [NSString stringWithFormat:@"%@%@", @"file://localhost", path];
	NSURL *url = [[NSURL alloc] initWithString:string];
	NSData *data = [NSData dataWithContentsOfURL:url];
	NSImage *image = [[NSImage alloc] initWithData:data];
	[self setImage:image];
	[super print:sender];
}

@end

 

[chown33]

	NSString *path = [@"~/Logo.png" stringByStandardizingPath];

That won't work, because stringByStandardizingPath doesn't expand tildes. You need to use stringByExpandingTildeInPath.

Of course, ~ doesn't represent the working directory, so maybe that's not what you want. There are a number of path-related NSString methods. I recommend you look at them all, so you are familiar with what is there.

 

[kainjow]

The following code works, I mean that it prints the image, but I need to get the image from the current directory and I don't know how. (I tried just using the file name for the path name, but that didn't work for some reason.)

The way you're building a URL is wrong. You should use the fileURLWithPath: method instead.

Second, no need to load the data directly. NSImage has several methods for loading directly from a file or URL. Check out the documentation.

Third, like chown33 mentioned, you're not properly loading a file via the current working directory. Look at NSFileManager for working with it.

That won't work, because stringByStandardizingPath doesn't expand tildes. You need to use stringByExpandingTildeInPath.

Actually it does

This method can make the following changes in the provided string:

Expand an initial tilde expression using stringByExpandingTildeInPath.