I have an NSTableView where I would like to be notified if the user clicks in a column "ClickMe". I linked the entire table view to a method which can extract the clickedColumn:, but I get an absolute number and not a reference to the "ClickMe" column (which may have been moved to another place).
I could of course program my own search algorithm to see if column X is actually the "Clickme" column, but that would not be very elegant. Is there a way to identify columns properly, and to receive that ID programmatically?
I found a way to do my own search in a fairly fast way, but I still have a feeling I am putting too much effort in this:
First, set the Identifier of the desired column in the Interface Builder to "ClickMeColumn". Then:
NSInteger cmColumn = [tableView columnWithIdentifier:#"ClickMeColumn"];
if ( [tableView clickedColumn] == cmColumn )
NSLog(#"Clicked me!");
I am looking for something along the lines of [tableView clickedColumnIdentifier].
What about querying NSTableView's columnAtPoint: in your table views mouseDown: or mouseUp: method?
Use any of the methods below. Called by the tableView's delegate on selection. You can extract the identifier and the title string from the relevant tableColumn.
- (void)tableView:(NSTableView *)tableView didClickTableColumn:(NSTableColumn *)tableColumn {
NSLog(#"tableView:didClickTableColumn: %#, titleString: %#", [tableColumn identifier], [[tableColumn headerCell] stringValue]);
}
- (void)tableView:(NSTableView *)tableView mouseDownInHeaderOfTableColumn:(NSTableColumn *)tableColumn {
NSLog(#"tableView:mouseDownInHeaderOfTableColumn: %#, titleString: %#", [tableColumn identifier], [[tableColumn headerCell] stringValue]);
}
From: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSTableView_Class
Related
I have an NSTableview, in this table view I populate columns with objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row.
I would like a column that is not populated. If I place a column with no identifier or an identifier that doesn't match a key I receive an error for not being key coding compliant.
Now what I have done to circumvent this is add a column with an identifier named 'skip', I check for this condition in my code with this...
-(id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row{
Pizza* pizza = [pizza objectAtIndex:row];
NSString* identifier = [tableColumn identifier];
if ([identifier isEqualToString:#"skip"]) {
return nil;
}
return [pizza valueForKey:identifier];
}
I also have to reciprocate this in the setObjectValue:(id)object forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row as well.
It seems to work fine, but it seems like a bit of a hack.
Is there a better way to do this?
Furthermore, the reason I want empty columns is because I want to place objects such as buttons that don't belong to the array that the table view is referencing.
Thanks for you input!
It's not a hack. That's how it's done. You're supposed to check the column identifier to figure out what object value to return for it. You wanted to just pass that choice through to the Pizza object, but it's common for a view to have aspects that aren't embodied in the model and therefore the controller has to mediate. If you want, you could override -valueForUndefinedKey: in the Pizza class but, in my opinion, that would be a hack. By the way, once you have a check of the column identifier, you don't have to use "skip". You can check for an empty identifier as easily.
I have a view based NSTable with ten or more rows and five columns. To populate data for this table, I have a dictionary of 5 arrays. So each dictionary object is for each column.
Now I need to get information when I click on any cell. I am using tableViewSelectionDidChange delegate to get notified on cell selection. Using this I can get only the [myTableView selectedRow] to get to know the row selected. How can I know which column was the row in. For ex: I select/click on 5th row in 3rd column. Now I need to know which column was it clicked on so that I can extract required object from the dictionary.
Any clues ?
You may override the mouseDown: event of your tableView and get the clicked column as:
- (void)mouseDown:(NSEvent *)theEvent
{
NSPoint globalLocation = [theEvent locationInWindow];
NSPoint localLocation = [self convertPoint:globalLocation fromView:nil];
NSInteger clickedCol = [self columnAtPoint:localLocation];
[super mouseDown:theEvent];
}
or you may use NSTableView delegate method:
tableView:didClickTableColumn:
For reference check:
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/NSTableViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/NSTableViewDelegate/tableView:didClickTableColumn:
I have two coloumn in NSTableView as Name and Salary with 5-10 values. I want to sort these coloumn after click on header of both the column. There is lots of data present in Internet but I am not able to use these. Please help me to do this in cocoa.
Thanks in advance and appreciate any help.
Each table column has a method setSortDescriptorPrototype
Sort descriptors are ways of telling the array how to sort itself (ascending, descending, ignoring case etc.)
Iterate over each of the columns you want as sortable and call this method on each of those columns, and pass the required sort descriptor (In my case I'll be using the column identifier)
for (NSTableColumn *tableColumn in tableView.tableColumns ) {
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:tableColumn.identifier ascending:YES selector:#selector(compare:)];
[tableColumn setSortDescriptorPrototype:sortDescriptor];
}
After writing this piece of initialization code, NSTableViewDataSource has a method - (void)tableView:(NSTableView *)aTableView sortDescriptorsDidChange:(NSArray *)oldDescriptors that notifies you whenever a sort descriptor is changed, implement this method in the data source and send a message to the data array to sort itself
- (void)tableView:(NSTableView *)aTableView sortDescriptorsDidChange:(NSArray *)oldDescriptors
{
self.data = [self.data sortedArrayUsingDescriptors:sortDescriptors];
[aTableView reloadData];
}
This method will get fired each time a column header is clicked, and NSTableColumn shows a nice little triangle showing the sorting order.
I stumbled upon this question while looking for the easiest way of implementing something similar. Although the original question is old, I hope someone finds my answer useful! Please note that I am using Xcode 5.1.1
Ok so to do this you need to:
select the actual column you want to sort in your table.
In your Attributes Inspector you need to fill in two fields: Sort Key, and Selector.
In the Sort Key field, you need to enter the value of your Identifier. The value of your Identifier is located in your Identity Inspector.
In the Selector field you need to enter a suitable selector method based on the object type in the column. The default method is; compare:
Based on the Table View Programming Guide for Mac. The compare: method works with NSString, NSDate, and NSNumber objects. If your table column contains only strings, you may want to consider using the caseInsensitiveCompare: method if case sensitivity is unimportant. However, consider replacing these method signatures with the localizedCompare: or localizedCaseInsensitiveCompare: methods to take into the account the user’s language requirements.
Finally, you need to declare the tableView:sortDescriptorsDidChange: method in your Table View Controller in the format shown below:
-(void)tableView:(NSTableView *)mtableView sortDescriptorsDidChange:(NSArray *)oldDescriptors
{
[listArray sortUsingDescriptors: [mtableView sortDescriptors]];
[tableView reloadData];
}
Just had lately the same issue to get tableView sorted.
My approach :
bind your sortDescriptors to tableview's arrayController
bind tableview's sortDescriptors to Arraycontroller's sort descriptor
perform the settings in attribute inspector (see Tosin's answer above)
Worked perfect for me. No need to set prototypes for columns or something else.
Thanks very much ,It is usefullly for my question.
my code like this
First, set unique values in the XIB interface，like name...
- (void)viewDidLoad {
[super viewDidLoad];
self.itemTableView.dataSource = self;
self.itemTableView.delegate = self;
self.itemTableView.selectionHighlightStyle = NSTableViewSelectionHighlightStyleRegular;
self.itemTableView.usesAlternatingRowBackgroundColors = YES;
for (NSTableColumn *tableColumn in self.itemTableView.tableColumns ) {
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:tableColumn.identifier ascending:NO selector:#selector(compare:)];
[tableColumn setSortDescriptorPrototype:sortDescriptor];
}
}
-(void)tableView:(NSTableView *)tableView sortDescriptorsDidChange:(NSArray<NSSortDescriptor *> *)oldDescriptors{
NSLog(#"sortDescriptorsDidChange：%#",oldDescriptors);
[self.itemArr sortUsingDescriptors:[tableView sortDescriptors]];
[self.itemTableView reloadData];
}
So I admit to being a total noob to cocoa, so I offer a noob question. I'm probably just missing the dumb obvious somewhere but i just cant seem to get my table to populate data.
I'm following the table view playground example but everytime i try to mimic the Basic TableView Window the first row becomes the height of the number of rows i added (at least thats what it looks like. Here is my code:
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(int)row
{
NSString *identifier = [tableColumn identifier];
if ([identifier isEqualToString:#"filename"]) {
// We pass us as the owner so we can setup target/actions into this main controller object
NSTableCellView *cellView = [fileBrowserTable makeViewWithIdentifier:identifier owner:self];
// Then setup properties on the cellView based on the column
cellView.textField.stringValue = [fileList filenameAtIndex:row];
cellView.imageView.objectValue = [[NSWorkspace sharedWorkspace] iconForFile:[fileList fullPathAtIndex:row]];
return cellView;
}
else if ([identifier isEqualToString:#"path"]) {
NSTextField *textField = [fileBrowserTable makeViewWithIdentifier:identifier owner:self];
textField.objectValue = [fileList pathAtIndex:row];
return textField;
}
else if ([identifier isEqualToString:#"preview"]) {
NSTextField *textField = [fileBrowserTable makeViewWithIdentifier:identifier owner:self];
textField.objectValue = [fileList previewAtIndex:row];
return textField;
}
return nil;
}
I think its worth mentioning that when using a the old school text field cell, I have no problems displaying data (of course the above code is different in that case) so im positive sure its not a problem with my data structure that holds the values. I have also set the correct delegate and data source
The cell using the 'filename' identifier uses the 'image and text table view cell' while the others use just a 'text table cell view'. Neither of them work so i'm guessing something is wrong with how I set my table up. But when comparing my table with that of the example, it's just a spitting reflection (minus identifiers file names).
One thing that I notice that I can't quite figure out is that the example says:
The NSTableView has two reuse identifier assocations: "MainCell" and "SizeCell" are both associated with the nib ATBasicTableViewCells.xib
I don't really understand this statement. However that being said, the example doesn't contain any ATBasicTableViewCells.xib nor does it have any associations with it (code or ib) that I can find.
Have you tried to set the rowSizeStyle of the NSTableView to NSTableViewRowSizeStyleCustom?
[UPDATE] Re-reading your question, it's not clear for me what your problem is. The solution I have given is related to problems with the size of each cell which is not taken into account unless the rowSizeStyle is set to custom.
I have NSTableView in my application. right now say is 8 columns by 48 rows.
I have a function that runs a specific a specific column to see wether or not the value in each cell is greater than a certain value. If it is I would like the application to highlight the row.
I did some reading and I am still looking for the functions calls or a process that will let me extract the cells/rows/or rect and let me change the color.
What are the functions and the steps in changing the color of the cells?
- [NSTableView selectRowIndexes:byExendingSelection:]
Source
To change the color of the cell you can try this method
-(void)tableView:(NSTableView *)tableView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
[cell setDrawsBackground:YES];
if(row==0)
[cell setBackgroundColor:[NSColor color];
else if(row==1||row==2)
[cell setBackgroundColor:[NSColor color];
else
[cell setBackgroundColor:[NSColor color];
}
this will make your row with different color.
Set a tableView delegate and implement the
– tableView:dataCellForTableColumn:row:
method. Then write a custom dataCell class to do the custom drawing.
If you extract the data as strings, you can use :-
NSAttributedString
to change the colour of both text and background.
-(void)tableView:(NSTableView *)tableView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
...gives you the pre-made cell (usually a NSTextFieldCell) which you can then color. Don't need to return it - Apple has already made it and is about to use it, just modify the object as you see fit. Works great.