Custom NSPopupButtonCell in NSTableView - objective-c

Question

I am trying to create a custom popup menu in a tableview. As I understand it I can should be able to do so by calling the [NSPopupButtonCell setView:myView] method passing in the custom view (which is just a NSView with an NSOutlineView in it).
So I have created a NSPopupButtonCell subclass and during initialisation I call setView and pass in the custom outline view..
EDIT
In IB I have set the table columns cell to a Popup Button Cell and set
the class to my custom LookupPopupButtonCell.
I still don't get my custom view displaying but my custom classes
initialisation methods appear to be getting called.
I have since replaced this approach with using a NSTableViewDelegate method dataCellForTableColumn. Now the popup shows my custom tableView.
Still no joy in getting the NSOutlineViewDelegate methods called though.
EDIT
OK I have managed to get things working using a NSPopupButton on a view. delegate works find and table view displays things fine. Seems that using NSPopupButtonCell the delegate methods never get called.
#implementation LookupPopupButtonCell
- (id)init
{
LOG(#"init called");
self = [super init];
if (self) {
[self initialise];
}
return self;
}
- (void)initialise
{
LOG(#"initialise called");
[self setFont:[NSFont fontWithName:#"System Regular" size:11]];
[self setBordered:NO];
[self setBezeled:NO];
// Set the Task Lookup Popup Menu
NSMenu *newLookupMenu = [[NSMenu allocWithZone:[NSMenu menuZone]] initWithTitle:#"Custom"];
NSMenuItem *newItem = [[NSMenuItem allocWithZone:[NSMenu menuZone]] initWithTitle:#"Lookup" action:nil keyEquivalent:#""];
[newItem setEnabled:YES];
TaskLookupViewController *viewController = [[TaskLookupViewController alloc] initWithNibName:#"TaskLookupViewController" bundle:nil];
[newItem setView:[viewController view]];
[newLookupMenu addItem:newItem];
[newItem release];
[self setMenu:newLookupMenu];
}
#end
#implementation TaskLookupViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
[self initialise];
}
return self;
}
- (void)awakeFromNib{
LOG(#"awakeFromNib called...");
[self viewDidLoad];
}
- (void)viewDidLoad {
FLOG(#"viewDidLoad called for %#", self);
/*
FLOG(#" _outlineView is %#", _outlineView);
FLOG(#" _outlineView is %#", [_outlineView identifier]);
FLOG(#" _outlineView delegate is %#", [_outlineView delegate]);
FLOG(#" _outlineView dataSource is %#", [_outlineView dataSource]);
*/
[_outlineView setDataSource:self];
[_outlineView setDelegate:self];
[_outlineView reloadData];
[_outlineView selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO];
[_outlineView setNeedsDisplay];
[_outlineView selectRowIndexes:[NSIndexSet indexSetWithIndex:2] byExtendingSelection:NO];
/*
FLOG(#" _outlineView delegate is %#", [_outlineView delegate]);
FLOG(#" _outlineView dataSource is %#", [_outlineView dataSource]);
*/
//NSTableColumn *tableColumn = [[_outlineView tableColumns] objectAtIndex:0];
//LOG(#" setting bindings");
//[tableColumn bind: #"value" toObject: _treeController withKeyPath: #"arrangedObjects.displayName" options: nil];
}
- (void)initialise {
LOG(#"initialise called");
_topLevelItems = [[NSArray arrayWithObjects:#"Project", #"Tasks and Deliverables", #"Finance", nil] retain];
_childrenDictionary = [NSMutableDictionary new];
[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Scope", nil] forKey:#"Project"];
//[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Issues", #"Risks", nil] forKey:#"Quality"];
[_childrenDictionary setObject:[NSArray arrayWithObjects:#"WBS", #"Functions", nil] forKey:#"Tasks and Deliverables"];
[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Expenses", #"Ongoing Costs", #"Timesheets", nil] forKey:#"Finance"];
//[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Applications", #"Interfaces", nil] forKey:#"IT Systems"];
//[_childrenDictionary setObject:[NSArray arrayWithObjects:#"People", #"Setup", nil] forKey:#"Administration"];
}
- (NSArray *)_childrenForItem:(id)item {
LOG(#"_childrenForItem called");
NSArray *children;
if (item == nil) {
children = _topLevelItems;
} else {
children = [_childrenDictionary objectForKey:item];
}
//FLOG(#" children are %#", children);
return children;
}
#end
#implementation TaskLookupViewController (NSOutlineViewDataSource)
- (void)outlineViewSelectionDidChange:(NSNotification *)notification {
LOG(#"outlineViewSelectionDidChange: called");
if ([_outlineView selectedRow] != -1) {
NSObject *item = [_outlineView itemAtRow:[_outlineView selectedRow]];
if ([_outlineView parentForItem:item] != nil) {
// Only change things for non-root items (root items can be selected, but are ignored)
FLOG(#" selected item is %#", item);
}
}
}
- (id)outlineView:(NSOutlineView *)outlineView child:(NSInteger)index ofItem:(id)item {
FLOG(#"outlineView:child:ofItem: called for item %#", item);
return [[self _childrenForItem:item] objectAtIndex:index];
}
- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item {
LOG(#"outlineView:isItemExpandable: called");
if ([outlineView parentForItem:item] == nil) {
return YES;
} else {
return YES;
}
}
- (NSInteger) outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item {
LOG(#"outlineView:numberOfChildrenOfItem: called");
FLOG(#" children count is %d", [[self _childrenForItem:item] count]);
return [[self _childrenForItem:item] count];
}
#end
#implementation TaskLookupViewController (NSOutlineViewDelegate)
- (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item {
LOG(#"outlineView:isGroupItem: called");
return [_topLevelItems containsObject:item];
}
- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item
{
LOG(#"willDisplayCell called");
[cell setTitle:#"Cell Title"];
}
- (NSView *)outlineView:(NSOutlineView *)outlineView viewForTableColumn:(NSTableColumn *)tableColumn item:(id)item {
LOG(#"outlineView:viewForTableColumn called");
// We just return a regular text view.
if ([_topLevelItems containsObject:item]) {
NSTextField *result = [outlineView makeViewWithIdentifier:#"HeaderTextField" owner:self];
// Uppercase the string value, but don't set anything else. NSOutlineView automatically applies attributes as necessary
NSString *value = [item uppercaseString];
[result setStringValue:value];
return result;
} else {
NSTextField *result = [outlineView makeViewWithIdentifier:#"ItemTextField" owner:self];
[result setStringValue:value];
return result;
}
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldExpandItem:(id)item;
{
LOG(#"outlineView:shouldExpandItem: called");
return YES;
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item;
{
LOG(#"outlineView:shouldSelectItem: called");
return YES;
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldCollapseItem:(id)item;
{
LOG(#"outlineView:shouldCollapseItem: called");
return NO;
}
#end
#implementation TaskLookupViewController (NSTableViewDelegate)
- (NSCell *)tableView:(NSTableView *)tableView dataCellForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
LOG(#"tableView:dataCellForTableColumn:row: called");
NSString *identifier = [tableColumn identifier];
if ([identifier isEqualToString:#"task"]) {
//LOG(#" task column setting the cell");
LookupPopupButtonCell *cellView = [[LookupPopupButtonCell alloc] init];
return cellView;
}
NSTextFieldCell *cellView = [tableView makeViewWithIdentifier:#"hoursCell" owner:self];
return cellView;
}
#end

Answer 1

It seems you must use a VIEW based tableView to get the delegate messages. Blah, now to figure out how to bind one of them to Core Data, hopefully its not too hard !
Is there any way to reuse the same menu for each row ? I guess as long as the dataSource is not recreated each time its probably not too bad, still there could be lots of rows in this hierarchy!