Add constructor and Set taking NSColor.

Change eqauality operator to check if the NSColor objects are the same
instance or if all of the color components (m_red/green/blue) are identical.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31310 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/cocoa/colour.mm

@@ -39,6 +39,12 @@ wxColour::wxColour (const wxColour& col)
     [m_cocoaNSColor retain];
 }
 
+wxColour::wxColour( WX_NSColor aColor )
+:   m_cocoaNSColor(nil)
+{
+    Set(aColor);
+}
+
 wxColour& wxColour::operator =(const wxColour& col)
 {
     m_cocoaNSColor = col.m_cocoaNSColor;
@@ -80,3 +86,18 @@ void wxColour::Set (unsigned char r, unsigned char g, unsigned char b)
     m_blue = b;
 }
 
+void wxColour::Set( WX_NSColor aColor )
+{
+    [aColor retain];
+    [m_cocoaNSColor release];
+    m_cocoaNSColor = aColor;
+
+    /* Make a temporary color in RGB format and get the values.  Note that
+       unless the color was actually RGB to begin with it's likely that
+       these will be fairly bogus. Particulary if the color is a pattern. */
+    NSColor *rgbColor = [m_cocoaNSColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
+    m_red = [rgbColor redComponent]*255.0;
+    m_green = [rgbColor greenComponent]*255.0;
+    m_blue = [rgbColor blueComponent]*255.0;
+}
+