Re: Hiding tab view items

2010-01-28 Thread BareFeet 
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 list.develo...@tandb.com.au
Date: 21 October 2009 6:02:21 PM AEDT
To: Cocoa Dev Cocoa-dev@lists.apple.com
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 list.develo...@tandb.com.au
Date: 13 October 2009 1:53:03 AM AEDT
To: Cocoa Dev Cocoa-dev@lists.apple.com
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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Re: Hiding tab view items

2009-10-21 Thread BareFeet 
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, which is  
prohibitively complicated since those tab view items also contain  
other objects which must therefore also be dynamically created and  
deleted.


At the moment, I've set up my tab view as tabless (ie the actual tabs  
don't show). Instead of tabs, I've created several segmented controls,  
one showing each desired set of segments. I've created a small second  
tabless tab view where each tab just contains one of the segmented  
controls. When the user selects a tree node (in the left pane),  
bindings switches to the tab containing the desired segmented control.  
When the user clicks on a segment, bindings then switches to the tab  
view corresponding to that segment.


user selects tree node
 - bindings selects small tab view item which contains just the  
desired segmented control

user selects segment in segmented control
 - bindings selects large tab view item which contains all the  
necessary objects


This works and requires almost no code (just bindings), so it's  
relatively neat. But it seems silly to have to create a second tab  
view just to switch between different segment controls.


Any other insights?

Thanks,
Tom
BareFeet

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Re: Hiding tab view items

2009-10-21 Thread Kyle Sluder 
On Wed, Oct 21, 2009 at 12:02 AM, BareFeet list.develo...@tandb.com.au wrote:
 This seems like a common requirement, so I keep thinking I must be missing
 something simple.

Nope.  You're going to need to write code.  The hardest part is
replacing the tab view items; this really isn't that difficult:

// Typed in Mail
- (void)updateTabView:(NSTabView *)tabView withItems:(NSArray *)newItems;
{
  NSArray *oldItems = [tabView tabViewItems];
  NSInteger newLocation = 0;
  for (NSTabViewItem *newItem in newItems) {
NSInteger existingLocation = [tabView indexOfTabViewItem:newItem];
if (existingLocation != NSNotFound)
  [tabView removeTabItem:newItem];
[tabView insertTabViewItem:newItem atIndex:newLocation++];
  }

  for (NSTabViewItem *oldItem in oldItems)
if (![newItems containsObject:oldItem])
  [tabView removeTabViewItem:oldItem]
}

--Kyle Sluder
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Re: Hiding tab view items

2009-10-21 Thread Nathan Day 
In general hiding bit of you interface depending on the state/ 
selection of you app is considered bad because it can confuse the  
user, if you disable elements then you are tell the user that the  
element is not available for the current state/selection etc., if you  
you hide elements then the user may think they have forgotten how to  
get to a particular feature and become frustrated as they try to find  
it. Also hiding elements can in some cases cause the remaining  
elements to move around which can allow confuse users (menu items for  
example), I am not saying you are wrong to do this in your case, only  
you can decided that.


On 13/10/2009, at 1:53 AM, BareFeet wrote:

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?


Nathan Day
http://homepage.mac.com/nathan_day/

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Re: Hiding tab view items

2009-10-21 Thread BareFeet 

Thanks for the reply, Kyle.


 [tabView removeTabViewItem:oldItem]


But isn't that going to destroy the tab item, the view it contains,  
and everything in that view? Can I get it back when that tab view item  
is valid again, or do I have to programmatically create all the objects?


Thanks,
Tom
BareFeet

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Re: Hiding tab view items

2009-10-21 Thread I. Savant 

On Oct 21, 2009, at 9:03 AM, BareFeet wrote:


[tabView removeTabViewItem:oldItem]


But isn't that going to destroy the tab item, the view it contains,  
and everything in that view? Can I get it back when that tab view  
item is valid again, or do I have to programmatically create all the  
objects?


  Not if you retain it and assign it to an ivar to keep it around.

--
I.S.


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Re: Hiding tab view items

2009-10-18 Thread BareFeet 

there a different roots to success


Thanks for the input.

a) roll your own Tabs instead of Segmented cell in combination with  
a tabless NSTabView


Do you mean use a segmented control with a tabless NSTabView, where  
each segmented cell is linked to a tab view?


I have set that up, but can't see a way to hide a segmented cell. I  
can turn off the enabled flag (in Interface Builder of via the  
accessor method), but there doesn't appear to be a hidden flag. I  
thought I might be able to set the width to zero, but the  
documentation says:



setWidth:forSegment:

The width of the segment, measured in points. Specify the value 0  
if you want the segment to be sized to fit the available space  
automatically.


So I guess I'll have to build the segmented control dynamically from  
scratch each time I want to hide a segmented cell, just leaving out  
that cell in the rebuild.



b) Add/remove tab items on demand


That sounds similar to above. However, I feel more comfortable  
rebuilding just a segmented cell than trying to delete and rebuild a  
whole view.


Seems messy either way though.

Thanks,
Tom
BareFeet

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Hiding tab view items

2009-10-12 Thread BareFeet 

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).


I tried using a segmented control, instead, using bindings to link it  
to the tab view (now tabless). But segmented control cells also seem  
to lack a hidden property.


Any ideas?

Thanks,
Tom
BareFeet

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Re: Hiding tab view items

2009-10-12 Thread Volker in Lists 

Hi,

there a different roots to success

a) roll your own Tabs instead of Segmented cell in combination with a  
tabless NSTabView

b) Add/remove tab items on demand

Both are fairly easy to achieve with some pitfalls like view retains  
and such. I am using the b) route for something similar and am  
swapping in and out views in a splitview pane on account of user  
choices. I also used route a) for an intelligent  inspector without  
problems.


Cheers,
Volker

Am 12.10.2009 um 16:53 schrieb BareFeet:


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).


I tried using a segmented control, instead, using bindings to link  
it to the tab view (now tabless). But segmented control cells also  
seem to lack a hidden property.


Any ideas?

Thanks,
Tom
BareFeet

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