Many thanks for this detailed help Jonathan.
I’ll work my way through it !
Peter
> On 4 Mar 2017, at 09:54, Jonathan Mitchell <li...@mugginsoft.com> wrote:
>
>> I’m still not out of the wood yet though.
>
>
> Sorry. I should have provided more details.
>
> What I do to support table cell view wrapping is this. However, I have to
> support back to 10.9 so it may be possible to use some of the newer auto
> NSTextField line wrapping stuff.
>
> 1. Create a nib containing a wrapping cell view and associate it with a
> column that we want to wrap the content of. View based tableviews use Auto
> Layout for interior layout but in IB it doesn’t generally add and constrains
> to the default table cell views. So make a BPWrappingTableCellView nib that
> contains an NSTextField configured to wrap and constrained to the width and
> height of the cell.
>
> columnCellNib = [[NSNib alloc] initWithNibNamed:@"BPWrappingTableCellView"
> bundle:nil];
> [self.tableView registerNib:columnCellNib forIdentifier:@"action”];
>
> 2. Now the height of a row in the tableview must equal the height of the
> tallest cell in the row. There is a NSTableViewDelegate call for this. IN
> this example I have only one column that I need to wrap. If you have more you
> will need to find out which column has the tallest content.
>
> - (CGFloat)tableView:(NSTableView *)tableView heightOfRow:(NSInteger)row
> {
> // calculate height of row based on height of cell view in variable height
> column
> id obj = self.arrayController.arrangedObjects[row];
> CGFloat height = [tableView bp_heightOfRowForString:obj.description
> variableHeightColumnIdentifier:@"action"];
> return height;
> }
>
> 3. Calculate height of cell using a worker cell. This is an NSTableView
> category method.
>
> #pragma mark -
> #pragma mark Row height support
>
> - (CGFloat)bp_heightOfRowForString:(NSString *)text
> variableHeightColumnIdentifier:(NSString *)identifier
> {
> /*
>
> Calculate height of row to accomodate wrapping text field in the
> description column.
> On 10.11 it might be possible to just use the fields Automatic setting.
>
>
> http://stackoverflow.com/questions/7504546/view-based-nstableview-with-rows-that-have-dynamic-heights
>
> */
> // we use a layout worker cell for height calcs.
> if (!self.layoutCellView) {
> self.layoutCellView = [self makeViewWithIdentifier:identifier
> owner:nil];
> }
>
> // reset size
> CGFloat width = [self tableColumnWithIdentifier:identifier].width;
> [self.layoutCellView setFrameSize:NSMakeSize(width, 10)];
>
> // set the cell text
> self.layoutCellView.textField.stringValue = text;
>
> // layout to calculate size
> self.layoutCellView.textField.preferredMaxLayoutWidth = width -
> self.layoutCellView.textField.frame.origin.x - 10;
> [self.layoutCellView layoutSubtreeIfNeeded];
> CGFloat height = self.layoutCellView.frame.size.height;
>
> if (height < 30) height = 30;
> if (height > 150) height = 150;
>
> return height;
> }
>
> 4. Deal with column resizing:
>
> - (void)tableViewColumnDidResize:(NSNotification *)aNotification
> {
> // notify table view of row height change if variable height column width
> changes
> NSTableColumn *tableColumn = aNotification.userInfo[@"NSTableColumn"];
> NSTableView *tableView = tableColumn.tableView;
> [tableView bp_columnDidResize:tableColumn
> variableHeightColumnIdentifiers:@[@"action"]];
> }
>
> Another NSTableView category method.
> - (void)bp_columnDidResize:(NSTableColumn *)tableColumn
> variableHeightColumnIdentifiers:(NSArray *)columnIds
> {
> /*
>
> Trigger row height recalculation when change table column width
>
> */
> if (self.numberOfRows > 0 && [columnIds
> containsObject:tableColumn.identifier]) {
> NSIndexSet *rowIndexSet = [NSIndexSet
> indexSetWithIndexesInRange:NSMakeRange(0, self.numberOfRows)];
> [NSAnimationContext beginGrouping];
> [[NSAnimationContext currentContext] setDuration:0];
> [self noteHeightOfRowsWithIndexesChanged:rowIndexSet];
> [NSAnimationContext endGrouping];
> }
> }
>
> HTH
>
> J
>
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