Activates the receiver, displays the color panel, and makes the current color the same as its own.
- macOS 10.0+
trueto deactivate any other color wells;
falseto keep them active. If a color panel is active with
trueand another is subsequently activated with
false, the exclusive setting of the first panel is ignored.
This method redraws the receiver. An active color well will have its color updated when the current color of the
NSColor changes. Any color well that shows its border highlights the border when it’s active.