Thanks Jonathan,
I got a lot further now.
So it is NSTableCellView, not NSTableViewCell as stated in the doc !
I could have searched a long time before finding this out....
I made my own text field class according to this (in NSTableCellView's doc) :
"""
The objectValue is used when setting the value of the view cell by the tableView:objectValueForTableColumn:row: method in the
NSTableViewDataSource. If you use your own custom view cells that are not based on NSTableCellView you should implement this
property in order to be able to receive changes to cell values.
"""
I added an "objectValue" property, with custom setter and getter, and updated
the textfield's string in the setter.
Now I can see all the names :)
I'm on the saddle again for the rest of my journey...
Eric M.
On 11/12/2017 12:46, Jonathan Mitchell wrote:
For NSTableCellView see
https://developer.apple.com/documentation/appkit/nstablecellview
objectValue is a property on NSTableCellView not on NStableView.
The NSTableViewDelegate method
- (NSView *)tableView:(NSTableView *)tableView
viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
provides the required NSTableView instances on demand.
You also need to bind the NSTableView's content object to the
NSArrayController’s arrangedObjects.
The nib makes all this easier though its still fiddly.
I would get it working in a nib first and then work backwards from there.
On 11 Dec 2017, at 10:59, Eric Matecki <eml...@wanadoo.fr> wrote:
Hello,
I'm trying to implement in Objective-C on macOS *programmatically* the "Real World
Example" at the bottom of this page :
https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/CocoaBindings/Concepts/WhatAreBindings.html
I want to do it programmatically instead of using IB to really understand what
happens.
Just creating the "Attacker" NSTableView causes me already a lot of trouble.
My code is at the bottom of this message.
I can't just bind "value" of the attacker tableview to the array controller's
"arrangedObjects.name",
I get a "this class is not key value coding-compliant for the key value"
exception.
So I create a column (I think this is mandatory anyway...).
In my delegates tableView:viewForTableColumn:row: I create a text field
(NSTextView).
(I create a textfield for now, will probably be a NSButton in the final
version).
I now see a table with four rows (the number of entries in my array), each with
a text field I can edit.
But they start empty and don't change my array of combattants.
How do I bind this text field to the right "thing" ?
According to the last paragraph of this page:
https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/TableView/PopulatingViewTablesWithBindings/PopulatingView-TablesWithBindings.html
I have to :
"""
When you make the connection to the table view’s Content binding, the
objectValue property of the NSTableViewCell used as the cell for the table
column is configured such that for each item in the model array, the table
updates the objectValue property to the current row’s Person object.
"""
But NSTableViewCell doesn't seem to exists (a search on Apple's dev doc gives
27 results... all about *UI*TableViewCell)
So I need to bind "value" from the text field to "objectValue.name" from...
something...
Whatever I try I get either an exception for not KV compliance, or it doesn't
seem to do anything.
Please shed some light on this...
Thanks.
CODE:
#include "Cocoa/Cocoa.h"
//===============================================================================================================
cCombattant
@interface cCombattant : NSObject
@property (copy) NSString* weapon1;
@property (copy) NSString* weapon2;
@property (copy) NSString* weapon3;
@property (copy,readwrite) NSString* name;
@property NSString** selectedWeapon;
- (cCombattant*)initWithName: (NSString*) iName;
//DEBUG
- (void)addObserver: (NSObject *)observer
forKeyPath: (NSString *)keyPath
options: (NSKeyValueObservingOptions)options
context: (void *)context;
//DEBUG
- (void)removeObserver: (NSObject *)observer
forKeyPath: (NSString *)keyPath;
@end
@implementation cCombattant
- (cCombattant*)initWithName: (NSString*) iName
{
self = [super init];
[self setWeapon1: @"Dagger"];
[self setWeapon2: @"Sword"];
[self setWeapon3: @"Pike"];
[self setSelectedWeapon: &_weapon1];
[self setName: iName];
return self;
}
//DEBUG
- (void)addObserver: (NSObject *)observer
forKeyPath: (NSString *)keyPath
options: (NSKeyValueObservingOptions)options
context: (void *)context
{
printf( "[%p addObserver: %p forKeyPath: %s options: XXX context: %p]\n",
self, observer, [keyPath UTF8String], /*options,*/ context );
int bkpt=bkpt;
[super addObserver: observer forKeyPath: keyPath options: options
context: context];
}
//DEBUG
- (void)removeObserver: (NSObject *)observer
forKeyPath: (NSString *)keyPath
{
printf( "[%p removeObserver: %p forKeyPath: %s]\n", self, observer, [keyPath
UTF8String] );
int bkpt=bkpt;
[super removeObserver: observer forKeyPath: keyPath];
}
@end
//===============================================================================================================
cDelegate
@interface cDelegate : NSObject < NSTableViewDelegate >
- (cDelegate*)init;
@end
@implementation cDelegate
- (cDelegate*)init
{
self = [super init];
return self;
}
- (NSView *)tableView:(NSTableView *)tableView
viewForTableColumn:(NSTableColumn *)tableColumn
row:(NSInteger)row
{
NSTextView* view = [[NSTextView alloc] init];
[view setRichText: NO];
[view setFieldEditor: YES];
[view bind: @"value" toObject: tableView withKeyPath: @"objectValue.name"
options: 0];
return view;
}
@end
//===============================================================================================================
JustDoIt2()
void
JustDoIt2()
{
@try{
NSArray* combattants =
[[NSArray alloc] initWithObjects:
[[cCombattant alloc] initWithName: @"Atilla"],
[[cCombattant alloc] initWithName: @"Vlad"],
[[cCombattant alloc] initWithName: @"Doris"],
[[cCombattant alloc] initWithName: @"Cthulhu"],
nil
];
printf("combattants = %p\n", combattants);
NSArrayController* controller = [[NSArrayController alloc]
initWithContent: combattants];
[controller setSelectedObjects: combattants]; //TEST: select all, doesn't
seem to change anything...
printf("controller = %p\n", controller);
NSTableView* table = [[NSTableView alloc] initWithFrame: NSMakeRect( 5,
5, 400, 400 )];
[table setBackgroundColor: [NSColor redColor]]; // just to be sure to see
it when empty...
[table setDelegate: [[cDelegate alloc] init]];
NSTableColumn* column = [[NSTableColumn alloc] initWithIdentifier:
@"name"];
[table addTableColumn: column];
printf("Binding table to arrangedObjects\n");
[table bind: @"content" toObject: controller withKeyPath:
@"arrangedObjects" options: 0];
NSWindow* window = [[NSWindow alloc]
initWithContentRect: NSMakeRect( 50, 50, 500, 500 )
styleMask: NSWindowStyleMaskTitled
backing: NSBackingStoreBuffered
defer: NO
];
[[window contentView] addSubview: table];
//TEST
//printf("Changing controller's content\n");
//[controller setContent: combattants2];
[window makeKeyAndOrderFront: 0];
}@catch(NSException*e){
int bkpt=bkpt;
}
}
--
Keep intel OUTSIDE my Mac !
Hiii !!! I can see Intel chips creeping around my G5 !
Eric M.
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--
Keep intel OUTSIDE my Mac !
Hiii !!! I can see Intel chips creeping around my G5 !
Eric M.
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