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 chrome's cocoa coding calisthenics! exercise 1 
 
 
  #16 (permalink)  
Old 04-04-2008, 11:35 PM
NSLog(@"%@", [self customTitle]);

Group: Regulars
Location: Melbourne
Can someone do this with bindings in an array controller or something in such a way that they can write even less code?
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  #17 (permalink)  
Old 04-04-2008, 11:54 PM
Regular

Group: Regulars
Location: S37°56.2' E145°07.6'
Quote:
Originally Posted by forgie View Post
Can someone do this with bindings in an array controller or something in such a way that they can write even less code?
I like your thinking!

Only two of the seven lines of code needed were actually hand written. The rest was generated by Interface Builder.

One of the two lines simply loaded the Cocoa Ruby bindings.

The remaining line of code is the one that actually does all the work... Appending strings should be a hard task.

Hooray for Ruby!

I wonder how many lines of code would be needed for the Python version. Any Python programmers care to give it a try?
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  #18 (permalink)  
Old 11-04-2008, 11:04 AM
MacTalk Engineering Dept.

Group: Regulars
Location: Sydney, Australia
I suspect that you'll need to write code to

a) Append text to the bottom of the text field and scroll it into view

b) Erase the text in the text entry field

Thats all the code I have. I guess you could make an array controller, and have the output text view changed to a list view, and then adding an entry/scrolling to the bottom would be easy, but selecting text wouldn't work as expected.

My implementation:

ExampleController.h:
Code:
#import <Cocoa/Cocoa.h>

@interface ExampleController : NSObject {
	IBOutlet NSTextView		*textOutput;
	IBOutlet NSTextField	*textInput;
}

- (IBAction) button_add:(id)sender;

- (void) appendString:(NSString *)str;

@end
ExampleController.m:
Code:
#import "ExampleController.h"


@implementation ExampleController

- (IBAction) button_add:(id)sender
{
	NSLog(@"event: button_add: %@", sender);
	
	[self appendString:textInput.stringValue];
	[self appendString:@"\n"];
	[textInput setStringValue:@""];
}

- (void) appendString:(NSString *)str;
{
	NSRange endRange;
	
	endRange.location = [[textOutput textStorage] length];
	endRange.length = 0;
	[textOutput replaceCharactersInRange:endRange withString:str];
	endRange.length = [str length];
	[textOutput scrollRangeToVisible:endRange];		
}

@end
Thanks everyone who had a crack at this, I'll post up the next exercise today
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  #19 (permalink)  
Old 11-04-2008, 05:32 PM
Regular

Group: Regulars
Location: S37°56.2' E145°07.6'
My text box was an NSTextField so it didn't have scrolling and whatnot. The complete code for my controller was the following.
Code:
require 'osx/cocoa'

class InsertController < OSX::NSObject
  ib_outlets :textBox, :textField

  ib_action :insert do |sender|
    @textBox.stringValue += @textField.stringValue + "\n"
  end
end
If I did want to use an NSTextView with scrolling the code would have to look like this:
Code:
require 'osx/cocoa'

class InsertController < OSX::NSObject
  ib_outlets :textBox, :textView

  ib_action :insert do |sender|
    @textView.string += @textBox.stringValue + "\n"
    @textView.scrollRangeToVisible( OSX::NSRange.new( @textView.string.length, 0 ) )
  end
end
You'll note in the second version I've renamed the outlets and "swapped" them. I don't think my original version was clear.

So, is anyone more interested in Ruby-Cocoa after seeing this solution?
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  #20 (permalink)  
Old 11-04-2008, 07:30 PM
MacTalk Engineering Dept.

Group: Regulars
Location: Sydney, Australia
To be honest, for scripted Cocoa, I think Nu is a lot more promising than either Python or Ruby, as it's syntax is much closer to Objective-C's, so the library access is almost identical.

Programming Nu
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  #21 (permalink)  
Old 12-04-2008, 07:36 AM
Regular

Group: Regulars
thanks heaps, ill start this afternoon
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