Hi all,
I am just following up on my previous queries about how to show a hierarchy of
Nodes in the left pane (like iTunes or Disk Utility) and have the available tab
view items on the right change according to the type of node that the user
selects.
Thanks to Volker, Kyle, Nathan and "Idiot Savant" for earlier replies. I think
I understand now how to retain tab view items so they can be removed and
reinserted.
I managed to set up my tab view to remove and reinsert particular tab views
according to what Node is selected, by using the NSOutlineView delegate method.
I first retain all the tab view items in the awakeFromNib handler. The example
below checks whether the selected nodeType is "table". It then removes or
inserts the tab view item with the identifier "Table" in the tab view.
This seems to work OK so far. If I've goofed anywhere, please let me know, via
the mail list.
@interface MyController : NSObject
{
IBOutlet NSTabView* tabView;
IBOutlet NSTreeController* nodeTreeController;
NSArray* retainedTabViewItems;
}
@end
@implementation MyController
- (void) awakeFromNib
{
retainedTabViewItems = [tabView tabViewItems];
[retainedTabViewItems retain];
}
- (void) dealloc
{
[retainedTabViewItems release];
[super dealloc];
}
- (void) outlineViewSelectionDidChange:(NSNotification*)notification
{
NSString* nodeType = [nodeTreeController
valueForKeyPath:@"selection.type"];
NSInteger visibleTabViewItemIndex = [tabView
indexOfTabViewItemWithIdentifier:@"Table"];
NSTabViewItem* retainedTabViewItem = nil;
for (int tabViewItemIndex = 0; tabViewItemIndex < [retainedTabViewItems
count]; tabViewItemIndex++)
{
retainedTabViewItem = [retainedTabViewItems
objectAtIndex:tabViewItemIndex];
NSString* retainedTabViewItemIdentifier = [retainedTabViewItem
identifier];
if ([retainedTabViewItemIdentifier isEqualToString:@"Table"])
break;
}
BOOL tabViewItemShouldShow = [nodeType isEqualToString:@"table"];
BOOL tabViewItemDoesShow = visibleTabViewItemIndex != NSNotFound;
if (tabViewItemShouldShow && !tabViewItemDoesShow)
{
[tabView insertTabViewItem:retainedTabViewItem atIndex:3];
}
else if (!tabViewItemShouldShow && tabViewItemDoesShow)
{
[tabView removeTabViewItem:retainedTabViewItem];
}
}
// other code omitted
@end
----
From: BareFeet <[email protected]>
Date: 21 October 2009 6:02:21 PM AEDT
To: Cocoa Dev <[email protected]>
Subject: Re: Hiding tab view items
This seems like a common requirement, so I keep thinking I must be missing
something simple.
For an example of similar functionality, look at Disk Utility. The user can
navigate through a tree of nested disks and partition nodes in the left view.
The right view shows a tab view that changes its tab items depending on what
tree node is selected on the left. For instance, if you select a disk, you see
the tab view items: First Aid, Erase, Partition, RAID and Restore. But if you
select a partition, the "Partition" tab view item disappears.
Since there is no hidden/visible property for tab view items, it seems that I
have to dynamically delete and create tab view items
<snip>
----
From: BareFeet <[email protected]>
Date: 13 October 2009 1:53:03 AM AEDT
To: Cocoa Dev <[email protected]>
Subject: Hiding tab view items
Hi all,
I have a hierarchical list of objects, like the typical iTunes or XCode left
pane. When the user selects a node in this hierarchy, I display detail of that
node in the pane on the right. This right pane is divided into tab view items.
Only some of the tab view items are relevant to each type of node, so I'd like
to hide the tab view items that are not relevant. How can I do this?
In Interface Builder, I can't see any "hidden" property of tab view item. There
is a "hidden" property for the sub-view of a tab view item, but this doesn't
hide the tab view item itself, so is misleading to the user (ie they can click
on it, only to see a blank view).
<snip>
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