Cocoa osx NSTableview change row highlight color - macos

Question

In my application I have a view based NSTableView with one column. The highlight color of the rows is set to regular (blue). I need to change that color to my custom color. In the interface builder I tried changing it but the only options are "None, regular and source list".
I tried this post solution with no success:
https://stackoverflow.com/a/9594543/3065901
I read that I have to use this delegate method but I dont know how to use this.
- (NSTableRowView *)tableView:(NSTableView *)tableView rowViewForRow:(NSInteger)row
I tried drawing the row in that method but i get invalid context warnings and the row still keeps with the same higlight.
Please post a simple example of how to use this delegate method:
Need help please. Thanks in advance.

Answer 1

From this link.
MyNSTableRowView.h
#import <Cocoa/Cocoa.h>
#interface MyNSTableRowView : NSTableRowView
#end
MyNSTableRowView.m
#import "MyNSTableRowView.h"
#implementation MyNSTableRowView
- (id)init
{
if (!(self = [super init])) return nil;
return self;
}
- (void)drawSelectionInRect:(NSRect)dirtyRect {
if (self.selectionHighlightStyle != NSTableViewSelectionHighlightStyleNone) {
NSRect selectionRect = NSInsetRect(self.bounds, 2.5, 2.5);
[[NSColor colorWithCalibratedWhite:.65 alpha:1.0] setStroke];
[[NSColor colorWithCalibratedWhite:.82 alpha:1.0] setFill];
NSBezierPath *selectionPath = [NSBezierPath bezierPathWithRoundedRect:selectionRect
xRadius:6 yRadius:6];
[selectionPath fill];
[selectionPath stroke];
}
}
#end
AppDelegate.m
- (NSTableRowView *)tableView:(NSTableView *)tableView rowViewForRow:(NSInteger)row
{
MyNSTableRowView *rowView = [[MyNSTableRowView alloc]init];
return rowView;
}

Answer 2

Here is user3065901's answer in Swift 3:
class MyNSTableRowView: NSTableRowView {
override func drawSelection(in dirtyRect: NSRect) {
if self.selectionHighlightStyle != .none {
let selectionRect = NSInsetRect(self.bounds, 2.5, 2.5)
NSColor(calibratedWhite: 0.65, alpha: 1).setStroke()
NSColor(calibratedWhite: 0.82, alpha: 1).setFill()
let selectionPath = NSBezierPath.init(roundedRect: selectionRect, xRadius: 6, yRadius: 6)
selectionPath.fill()
selectionPath.stroke()
}
}
}
NSTableViewDelegate:
func tableView(_ tableView: NSTableView, rowViewForRow row: Int) -> NSTableRowView? {
return MyNSTableRowView()
}

Answer 3

If you are using cell based tableview, set the NSTableView selectionHighLightStyle to None
NSTableView, and override drawRow sample below
- (void)drawRow:(NSInteger)row clipRect:(NSRect)clipRect {
NSColor* bgColor = Nil;
// Set the color only when its first responder and key window
if (self == [[self window] firstResponder] && [[self window] isMainWindow] && [[self window] isKeyWindow])
{
bgColor = [NSColor brownColor];
}
else
{
bgColor = [NSColor windowBackgroundColor];;
}
NSIndexSet* selectedRowIndexes = [self selectedRowIndexes];
if ([selectedRowIndexes containsIndex:row])
{
[bgColor setFill];
NSRectFill([self rectOfRow:row]);
}
[super drawRow:row clipRect:clipRect];
}

Answer 4

Add below line in your tableview method
ObjectiveC
[yourtableview setSelectionHighlightStyle:NSTableViewSelectionHighlightStyleNone];
Swift
yourtableview.selectionHighlightStyle = .none