So, I decided to get rid of the NSArrayController, since it was driving me
slightly crazy, and just do this manually. I've got the table **appearing** as
I'd like it to, but I can't change the selection. There are 3 columns: 1)
string, 2) NSPopUpButtonCell for MIDI ports, and 3) NSPopUpButtonCell for MIDI
channels. Basically, nothing can be changed. It comes up as 1) "default" (set
in the init of MIDIInstrument), 2) as item 2 in column 2's popup, and 3) as
item 2 in column 3's popup.
I don't know if maybe I have the functions of these two methods reversed
somehow, or what. The naming of the methods is a bit unclear. I'm assuming that
"objectValueForTableColumn" would mean what I want to "give" to the table for
display, whereas "setObjectValue:forTableColumn" would be what I want to "give"
to my object, from the table. Mind you, the latter would be clearer as
"setObjectValue:fromTableColumn", if that was the case... dunno...
Here's my manual code for updating the table:
- (id) tableView:(NSTableView *)tv objectValueForTableColumn:(NSTableColumn
*)tc row:(NSInteger)row
{
if(tv == midiInstrumentsTable)
{
id inst = [[self instrumentLibrary] objectAtIndex:row];
if(inst == nil)
return nil;
if(tc == midiInstNamesColumn)
{
// give the name for the associated MIDIInstrument
return [inst MIDI_Inst_Name];
}
else if(tc == midiPortsColumn)
{
// list the ports for the associated MIDIInstrument
NSPopUpButtonCell* ports = [tc dataCell];
[ports removeAllItems];
int i;
for(i=0;i < [[inst MIDI_Inst_Ports] count];i++)
[ports addItemWithTitle:[[inst MIDI_Inst_Ports]
objectAtIndex:i]];
return ports;
}
else if(tc == midiChannelsColumn)
{
// list the channels for the associated MIDIInstrument
(just 16 numbers)
NSPopUpButtonCell* channels = [tc dataCell];
[channels removeAllItems];
int i;
for(i=0;i < 16;i++)
[channels addItemWithTitle:[NSString
stringWithFormat:@"%i", i+1]];
return channels;
}
}
return nil;
}
- (void) tableView:(NSTableView *)tv setObjectValue:(id)v
forTableColumn:(NSTableColumn *)tc row:(NSInteger)row
{
if (tv == midiInstrumentsTable)
{
id inst = [[self instrumentLibrary] objectAtIndex:row];
if(inst == nil)
return;
if (tc == midiInstNamesColumn)
{
// set the given name
[inst setMIDI_Inst_Name:[[tc dataCell] title]];
}
else if(tc == midiPortsColumn)
{
// set the selected port
[inst setMIDI_Inst_Port:[[[tc dataCell] selectedItem]
title]];
}
else if(tc == midiChannelsColumn)
{
// set the selected channel
[inst setMIDI_Inst_Channel:[NSNumber
numberWithInt:[[[[tc dataCell] selectedItem] title] integerValue]]];
}
}
}
Any help very much appreciated.
J.
On 2010-05-19, at 2:19 PM, James Maxwell wrote:
> okay, going slightly nuts. I've implemented my MIDI_Instrument_Controller
> object, and hooked it up to my table view, but it's complaining about
> implementing numberOrRowsInTableView and
> tableView:objectValueForTableColumn:row:. Fine, except that I very definitely
> have implemented them. I tried cleaning, and reloading classes in IB, to no
> avail. Has anyone seen this? Any solutions?
>
> J.
>
>
>
> On 2010-05-18, at 6:27 PM, Mark Ritchie wrote:
>
>> Hey James!
>>
>> On 18/May/2010, at 5:42 PM, James Maxwell wrote:
>>> Okay, getting a bit deeper into this, I realize I'm still "in the woods",
>>> so to speak. I'm going to have to hook up my NSTableView to set the
>>> *selected* port and channel for the MIDIInstruments, which means it's
>>> pretty much going to have to be loaded in the nib after all (since the
>>> MIDIInstrument has to respond to the selection made in the table). So, if I
>>> do that, and make the connections to Central_MIDI_Controller, as
>>> recommended, will the NSArrayController be able to add new instances of
>>> MIDIInstrument (and new rows to my table), which also have these
>>> connections? As I mentioned, I need an arbitrary number of MIDIInstruments.
>>
>> It seems to me that you are not separating the model, view and controller
>> bits.
>> To me, MIDIInstrument sounds like it's part of the Model (the internal state
>> of things) and it should not be talking directly to the TableView. The
>> controller in the middle should be tracking and co-ordinating things.
>> I hope that helps!
>> M.
>
> James B Maxwell
> Composer/Doctoral Student
> School for the Contemporary Arts (SCA)
> School for Interactive Arts + Technology (SIAT)
> Simon Fraser University
> [email protected]
> [email protected]
>
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James B Maxwell
Composer/Doctoral Student
School for the Contemporary Arts (SCA)
School for Interactive Arts + Technology (SIAT)
Simon Fraser University
[email protected]
[email protected]
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