Editing an NSOutlineView item
I've successfully built an NSOutlineView and configured the items for
editing. Got that working.
Now, in my delegate/datasource, I am implementing
- (BOOL)outlineView:(NSOutlineView *)outlineView
shouldEditTableColumn:(NSTableColumn *)tableColumn
item:(id)item {
NSLog(@hi);
}
but when I tap on a field a 2nd time to edit it - this never gets invoked.
I am also implementing
- (void)outlineView:(NSOutlineView *)outlineView
setObjectValue:(id)object
forTableColumn:(NSTableColumn *)tableColumn
byItem:(id)item {
NSLog(@hi);
}
but once I replace the text of the field and hit enter, this is not called
either. Is there something else I must to do get complete editing
capability?
Also, 1 final trivial question ... let's say I want to allow editing ONLY
after right clicking and picking a context menu item. Assuming I can get
the row and column from the event, how do I programmatically turn the
editor on for a specific field?
Thanks,
-Luther
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Re: Editing an NSOutlineView item
On Oct 27, 2014, at 7:02 PM, Luther Baker lutherba...@gmail.com wrote:
I've successfully built an NSOutlineView and configured the items for
editing. Got that working.
Now, in my delegate/datasource, I am implementing
- (BOOL)outlineView:(NSOutlineView *)outlineView
shouldEditTableColumn:(NSTableColumn *)tableColumn
item:(id)item {
NSLog(@hi);
}
but when I tap on a field a 2nd time to edit it - this never gets invoked.
I'm guessing that you're using a view-based outline view (as you should, since
it's the modern way). The above method is only used for NSCell-based outline
views. This is not as clearly documented as it should be. The corresponding
method for NSTableView is clearly documented as only valid for NSCell-based
table views.
In a view-based outline view, the individual views within the cells of the
outline view act (almost) just like views elsewhere. An NSTextField controls
its own editability. You can use bindings to control the text field's
editability or you can set its editable property as conditions warrant.
The outline view is involved in a less direct manner. Its implementation of
-validateProposedFirstResponder:forEvent: is called and can control whether the
text field can become first responder, a.k.a. begin editing.
I am also implementing
- (void)outlineView:(NSOutlineView *)outlineView
setObjectValue:(id)object
forTableColumn:(NSTableColumn *)tableColumn
byItem:(id)item {
NSLog(@hi);
}
but once I replace the text of the field and hit enter, this is not called
either. Is there something else I must to do get complete editing
capability?
Again, this is not used for view-based outline views and this is most clearly
documented for the corresponding table view method. You can use bindings to
tie the text field's value to a key path of the object associated with the cell
or you can use target-action to trigger a method when the text field's value
has changed.
Also, 1 final trivial question ... let's say I want to allow editing ONLY
after right clicking and picking a context menu item. Assuming I can get
the row and column from the event, how do I programmatically turn the
editor on for a specific field?
The traditional way is to use -editColumn:row:withEvent:select:, but it's more
complicated with view-based outline views. That method will attempt to make
the cell view the first responder. Not all views accept first responder and
support a notion of editing when they are first responder. For example,
NSTableCellView does not, and that's commonly used as the cell view.
If you use a bare NSTextField as the cell view, then the above method will work
directly because the text field will accept first responder and begin editing
(assuming it's editable).
If you're using a compound cell view and you want to initiate editing on a
particular text field within it, you should make it first responder directly:
NSTableCellView* tableCellView = [outlineView viewAtColumn:column row:row
makeIfNecessary:NO];
NSTextField* textField = tableCellView.textField;
if ([textField acceptsFirstResponder])
[textField.window makeFirstResponder:textField];
You may also want to select the row and scroll it into view.
Regards,
Ken
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Re: Editing an NSOutlineView item
Thanks Ken. Just what I needed.
-Luther
On Mon, Oct 27, 2014 at 7:47 PM, Ken Thomases k...@codeweavers.com wrote:
On Oct 27, 2014, at 7:02 PM, Luther Baker lutherba...@gmail.com wrote:
I've successfully built an NSOutlineView and configured the items for
editing. Got that working.
Now, in my delegate/datasource, I am implementing
- (BOOL)outlineView:(NSOutlineView *)outlineView
shouldEditTableColumn:(NSTableColumn *)tableColumn
item:(id)item {
NSLog(@hi);
}
but when I tap on a field a 2nd time to edit it - this never gets
invoked.
I'm guessing that you're using a view-based outline view (as you should,
since it's the modern way). The above method is only used for NSCell-based
outline views. This is not as clearly documented as it should be. The
corresponding method for NSTableView is clearly documented as only valid
for NSCell-based table views.
In a view-based outline view, the individual views within the cells of the
outline view act (almost) just like views elsewhere. An NSTextField
controls its own editability. You can use bindings to control the text
field's editability or you can set its editable property as conditions
warrant.
The outline view is involved in a less direct manner. Its implementation
of -validateProposedFirstResponder:forEvent: is called and can control
whether the text field can become first responder, a.k.a. begin editing.
I am also implementing
- (void)outlineView:(NSOutlineView *)outlineView
setObjectValue:(id)object
forTableColumn:(NSTableColumn *)tableColumn
byItem:(id)item {
NSLog(@hi);
}
but once I replace the text of the field and hit enter, this is not
called
either. Is there something else I must to do get complete editing
capability?
Again, this is not used for view-based outline views and this is most
clearly documented for the corresponding table view method. You can use
bindings to tie the text field's value to a key path of the object
associated with the cell or you can use target-action to trigger a method
when the text field's value has changed.
Also, 1 final trivial question ... let's say I want to allow editing ONLY
after right clicking and picking a context menu item. Assuming I can get
the row and column from the event, how do I programmatically turn the
editor on for a specific field?
The traditional way is to use -editColumn:row:withEvent:select:, but it's
more complicated with view-based outline views. That method will attempt
to make the cell view the first responder. Not all views accept first
responder and support a notion of editing when they are first responder.
For example, NSTableCellView does not, and that's commonly used as the cell
view.
If you use a bare NSTextField as the cell view, then the above method will
work directly because the text field will accept first responder and begin
editing (assuming it's editable).
If you're using a compound cell view and you want to initiate editing on a
particular text field within it, you should make it first responder
directly:
NSTableCellView* tableCellView = [outlineView viewAtColumn:column
row:row makeIfNecessary:NO];
NSTextField* textField = tableCellView.textField;
if ([textField acceptsFirstResponder])
[textField.window makeFirstResponder:textField];
You may also want to select the row and scroll it into view.
Regards,
Ken
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